| 1 | /* oxlint-disable no-restricted-syntax */ |
| 2 | import { assert, describe, it } from "@effect/vitest" |
| 3 | import { assertExitFailure, assertSuccess, assertTrue, deepStrictEqual, strictEqual } from "@effect/vitest/utils" |
| 4 | import { |
| 5 | Array, |
| 6 | ByteSize, |
| 7 | Cause, |
| 8 | Channel, |
| 9 | Clock, |
| 10 | Context, |
| 11 | Data, |
| 12 | Deferred, |
| 13 | Duration, |
| 14 | Effect, |
| 15 | Exit, |
| 16 | Fiber, |
| 17 | Latch, |
| 18 | Logger, |
| 19 | type LogLevel, |
| 20 | Option, |
| 21 | type Pull, |
| 22 | Queue, |
| 23 | Ref, |
| 24 | References, |
| 25 | Result, |
| 26 | Schedule, |
| 27 | Scheduler, |
| 28 | Schema, |
| 29 | Scope, |
| 30 | Sink, |
| 31 | Stream, |
| 32 | String as Str |
| 33 | } from "effect" |
| 34 | import { isReadonlyArrayNonEmpty, type NonEmptyArray } from "effect/Array" |
| 35 | import { constTrue, constVoid, pipe } from "effect/Function" |
| 36 | import { TestClock } from "effect/testing" |
| 37 | import * as fc from "fast-check" |
| 38 | import { assertCauseFail, assertFailure } from "./utils/assert.ts" |
| 39 | import { chunkCoordination } from "./utils/chunkCoordination.ts" |
| 40 | |
| 41 | describe("Stream", () => { |
| 42 | describe("callback", () => { |
| 43 | it.effect("with take", () => |
| 44 | Effect.gen(function*() { |
| 45 | const array = [1, 2, 3, 4, 5] |
| 46 | const result = yield* Stream.callback<number>((mb) => |
| 47 | Effect.sync(() => { |
| 48 | array.forEach((n) => { |
| 49 | Queue.offerUnsafe(mb, n) |
| 50 | }) |
| 51 | }) |
| 52 | ).pipe( |
| 53 | Stream.take(array.length), |
| 54 | Stream.runCollect |
| 55 | ) |
| 56 | assert.deepStrictEqual(result, array) |
| 57 | })) |
| 58 | |
| 59 | it.effect("with cleanup", () => |
| 60 | Effect.gen(function*() { |
| 61 | let cleanup = false |
| 62 | const latch = yield* Latch.make() |
| 63 | const fiber = yield* Stream.callback<void>(Effect.fnUntraced(function*(mb) { |
| 64 | yield* Effect.addFinalizer(() => |
| 65 | Effect.sync(() => { |
| 66 | cleanup = true |
| 67 | }) |
| 68 | ) |
| 69 | yield* Queue.offer(mb, void 0) |
| 70 | })).pipe( |
| 71 | Stream.tap(() => latch.open), |
| 72 | Stream.runDrain, |
| 73 | Effect.forkChild |
| 74 | ) |
| 75 | yield* latch.await |
| 76 | yield* Fiber.interrupt(fiber) |
| 77 | assert.isTrue(cleanup) |
| 78 | })) |
| 79 | |
| 80 | it.effect("signals the end of the stream", () => |
| 81 | Effect.gen(function*() { |
| 82 | const result = yield* Stream.callback<number>((mb) => { |
| 83 | Queue.endUnsafe(mb) |
| 84 | return Effect.void |
| 85 | }).pipe(Stream.runCollect) |
| 86 | assert.isTrue(result.length === 0) |
| 87 | })) |
| 88 | |
| 89 | it.effect("handles errors", () => |
| 90 | Effect.gen(function*() { |
| 91 | const error = new Error("boom") |
| 92 | const result = yield* Stream.callback<number, Error>((mb) => { |
| 93 | Queue.failCauseUnsafe(mb, Cause.fail(error)) |
| 94 | return Effect.void |
| 95 | }).pipe( |
| 96 | Stream.runCollect, |
| 97 | Effect.exit |
| 98 | ) |
| 99 | assert.deepStrictEqual(result, Exit.fail(error)) |
| 100 | })) |
| 101 | |
| 102 | it.effect("handles defects", () => |
| 103 | Effect.gen(function*() { |
| 104 | const error = new Error("boom") |
| 105 | const result = yield* Stream.callback<number, Error>(() => { |
| 106 | throw error |
| 107 | }).pipe( |
| 108 | Stream.runCollect, |
| 109 | Effect.exit |
| 110 | ) |
| 111 | assert.deepStrictEqual(result, Exit.die(error)) |
| 112 | })) |
| 113 | |
| 114 | it.effect("backpressure", () => |
| 115 | Effect.gen(function*() { |
| 116 | let count = 0 |
| 117 | let offered = 0 |
| 118 | let done = false |
| 119 | const pull = yield* Stream.callback<number>((mb) => |
| 120 | Effect.forEach( |
| 121 | [1, 2, 3, 4, 5, 6, 7], |
| 122 | Effect.fnUntraced(function*(n) { |
| 123 | count++ |
| 124 | yield* Queue.offer(mb, n) |
| 125 | offered++ |
| 126 | }), |
| 127 | { concurrency: "unbounded" } |
| 128 | ).pipe( |
| 129 | Effect.tap(() => Effect.sync(() => done = true)) |
| 130 | ), { bufferSize: 2 }).pipe(Stream.toPull) |
| 131 | yield* Effect.yieldNow |
| 132 | assert.strictEqual(count, 7) |
| 133 | assert.strictEqual(offered, 2) |
| 134 | assert.isFalse(done) |
| 135 | yield* pull |
| 136 | assert.strictEqual(offered, 4) |
| 137 | assert.isFalse(done) |
| 138 | })) |
| 139 | }) |
| 140 | |
| 141 | describe("destructors", () => { |
| 142 | const withScopeFinalizer = <A, E, R>( |
| 143 | self: Stream.Stream<A, E, R>, |
| 144 | finalizer: (exit: Exit.Exit<unknown, unknown>) => Effect.Effect<unknown> |
| 145 | ): Stream.Stream<A, E, R> => |
| 146 | Stream.fromChannel( |
| 147 | Channel.fromTransform((upstream, scope) => |
| 148 | Effect.andThen( |
| 149 | Scope.addFinalizerExit(scope, finalizer), |
| 150 | Channel.toTransform(Stream.toChannel(self))(upstream, scope) |
| 151 | ) |
| 152 | ) |
| 153 | ) |
| 154 | |
| 155 | it.effect("mkArrayBuffer - concatenates Uint8Array chunks", () => |
| 156 | Effect.gen(function*() { |
| 157 | const buffer = yield* Stream.make( |
| 158 | new Uint8Array([1, 2]), |
| 159 | new Uint8Array([3, 4]) |
| 160 | ).pipe(Stream.mkArrayBuffer) |
| 161 | |
| 162 | assert.deepStrictEqual([...new Uint8Array(buffer)], [1, 2, 3, 4]) |
| 163 | })) |
| 164 | |
| 165 | it.effect("runForEachWhile continues across chunk boundaries", () => |
| 166 | Effect.gen(function*() { |
| 167 | const seen: Array<number> = [] |
| 168 | yield* Stream.fromArrays([1, 2], [3, 4]).pipe( |
| 169 | Stream.runForEachWhile((n) => |
| 170 | Effect.sync(() => { |
| 171 | seen.push(n) |
| 172 | return true |
| 173 | }) |
| 174 | ) |
| 175 | ) |
| 176 | assert.deepStrictEqual(seen, [1, 2, 3, 4]) |
| 177 | })) |
| 178 | |
| 179 | it.effect("runForEachWhile stops when predicate returns false", () => |
| 180 | Effect.gen(function*() { |
| 181 | const seen: Array<number> = [] |
| 182 | yield* Stream.fromArrays([1, 2, 3], [4, 5]).pipe( |
| 183 | Stream.runForEachWhile((n) => |
| 184 | Effect.sync(() => { |
| 185 | seen.push(n) |
| 186 | return n < 3 |
| 187 | }) |
| 188 | ) |
| 189 | ) |
| 190 | assert.deepStrictEqual(seen, [1, 2, 3]) |
| 191 | })) |
| 192 | |
| 193 | it.effect("toAsyncIterable - return interrupts an in-flight pull", () => |
| 194 | Effect.gen(function*() { |
| 195 | const started = yield* Deferred.make<void>() |
| 196 | let interrupted = false |
| 197 | const iterator = Stream.toAsyncIterable( |
| 198 | Stream.fromEffect( |
| 199 | Effect.andThen( |
| 200 | Deferred.succeed(started, void 0), |
| 201 | Effect.never |
| 202 | ).pipe( |
| 203 | Effect.onInterrupt(() => |
| 204 | Effect.sync(() => { |
| 205 | interrupted = true |
| 206 | }) |
| 207 | ) |
| 208 | ) |
| 209 | ) |
| 210 | )[Symbol.asyncIterator]() |
| 211 | |
| 212 | const pending = iterator.next() |
| 213 | yield* Deferred.await(started) |
| 214 | const result = yield* Effect.promise(() => iterator.return!(undefined)) |
| 215 | const pendingResult = yield* Effect.promise(() => pending) |
| 216 | |
| 217 | assert.deepStrictEqual(result, { done: true, value: undefined }) |
| 218 | assert.deepStrictEqual(pendingResult, { done: true, value: undefined }) |
| 219 | assert.isTrue(interrupted) |
| 220 | })) |
| 221 | |
| 222 | it.effect("toAsyncIterable - return does not reject an unawaited in-flight next", () => |
| 223 | Effect.gen(function*() { |
| 224 | let interrupted = false |
| 225 | const iterator = Stream.toAsyncIterable( |
| 226 | Stream.fromEffect( |
| 227 | Effect.never.pipe( |
| 228 | Effect.onInterrupt(() => |
| 229 | Effect.sync(() => { |
| 230 | interrupted = true |
| 231 | }) |
| 232 | ) |
| 233 | ) |
| 234 | ) |
| 235 | )[Symbol.asyncIterator]() |
| 236 | |
| 237 | iterator.next() |
| 238 | const result = yield* Effect.promise(() => iterator.return!(undefined)) |
| 239 | yield* Effect.promise(() => new Promise<void>((resolve) => setTimeout(resolve, 0))) |
| 240 | |
| 241 | assert.deepStrictEqual(result, { done: true, value: undefined }) |
| 242 | assert.isTrue(interrupted) |
| 243 | })) |
| 244 | |
| 245 | it.effect("toAsyncIterable - early for await exit interrupts the producer", () => |
| 246 | Effect.gen(function*() { |
| 247 | let interrupted = false |
| 248 | const iterable = Stream.toAsyncIterable( |
| 249 | Stream.callback<number>((queue) => |
| 250 | Effect.andThen( |
| 251 | Queue.offer(queue, 1), |
| 252 | Effect.never |
| 253 | ).pipe( |
| 254 | Effect.onInterrupt(() => |
| 255 | Effect.sync(() => { |
| 256 | interrupted = true |
| 257 | }) |
| 258 | ) |
| 259 | ) |
| 260 | ) |
| 261 | ) |
| 262 | |
| 263 | yield* Effect.promise(async () => { |
| 264 | for await (const _ of iterable) { |
| 265 | break |
| 266 | } |
| 267 | }) |
| 268 | |
| 269 | assert.isTrue(interrupted) |
| 270 | })) |
| 271 | |
| 272 | it.effect("toAsyncIterable - return is idempotent without an in-flight pull", () => |
| 273 | Effect.gen(function*() { |
| 274 | const iterator = Stream.toAsyncIterable(Stream.make(1))[Symbol.asyncIterator]() |
| 275 | |
| 276 | const first = yield* Effect.promise(() => iterator.return!(undefined)) |
| 277 | const second = yield* Effect.promise(() => iterator.return!(undefined)) |
| 278 | const next = yield* Effect.promise(() => iterator.next()) |
| 279 | |
| 280 | assert.deepStrictEqual(first, { done: true, value: undefined }) |
| 281 | assert.deepStrictEqual(second, { done: true, value: undefined }) |
| 282 | assert.deepStrictEqual(next, { done: true, value: undefined }) |
| 283 | })) |
| 284 | |
| 285 | it.effect("toAsyncIterable - natural completion closes the scope with a successful exit", () => |
| 286 | Effect.gen(function*() { |
| 287 | const finalizerExits: Array<Exit.Exit<unknown, unknown>> = [] |
| 288 | const stream = withScopeFinalizer( |
| 289 | Stream.make(1, 2), |
| 290 | (exit) => |
| 291 | Effect.sync(() => { |
| 292 | finalizerExits.push(exit) |
| 293 | }) |
| 294 | ) |
| 295 | const values = yield* Effect.promise(async () => { |
| 296 | const values: Array<number> = [] |
| 297 | for await (const value of Stream.toAsyncIterable(stream)) { |
| 298 | values.push(value) |
| 299 | } |
| 300 | return values |
| 301 | }) |
| 302 | |
| 303 | assert.deepStrictEqual(values, [1, 2]) |
| 304 | assert.deepStrictEqual(finalizerExits, [Exit.void]) |
| 305 | })) |
| 306 | |
| 307 | it.effect("toAsyncIterable - stream failure is forwarded to the scope", () => |
| 308 | Effect.gen(function*() { |
| 309 | const streamError = new Error("stream failure") |
| 310 | const finalizerError = new Error("finalizer failure") |
| 311 | const finalizerExits: Array<Exit.Exit<unknown, unknown>> = [] |
| 312 | const capturedLogs: Array<unknown> = [] |
| 313 | const testLogger = Logger.make<unknown, void>((options) => { |
| 314 | capturedLogs.push(options.message) |
| 315 | }) |
| 316 | const stream = withScopeFinalizer( |
| 317 | Stream.fail(streamError), |
| 318 | (exit) => |
| 319 | Effect.andThen( |
| 320 | Effect.sync(() => { |
| 321 | finalizerExits.push(exit) |
| 322 | }), |
| 323 | Effect.die(finalizerError) |
| 324 | ) |
| 325 | ) |
| 326 | |
| 327 | const thrown = yield* Effect.gen(function*() { |
| 328 | const iterable = yield* Stream.toAsyncIterableEffect(stream) |
| 329 | return yield* Effect.promise(() => iterable[Symbol.asyncIterator]().next().catch((error) => error)) |
| 330 | }).pipe(Effect.withLogger(testLogger)) |
| 331 | |
| 332 | assert.strictEqual(thrown, streamError) |
| 333 | assert.deepStrictEqual(finalizerExits, [Exit.fail(streamError)]) |
| 334 | assert.strictEqual(capturedLogs.length, 1) |
| 335 | })) |
| 336 | |
| 337 | it.effect("toAsyncIterable - throw forwards a failure exit and preserves its error", () => |
| 338 | Effect.gen(function*() { |
| 339 | const thrownError = new Error("thrown failure") |
| 340 | const finalizerError = new Error("finalizer failure") |
| 341 | const finalizerExits: Array<Exit.Exit<unknown, unknown>> = [] |
| 342 | const capturedLogs: Array<unknown> = [] |
| 343 | const testLogger = Logger.make<unknown, void>((options) => { |
| 344 | capturedLogs.push(options.message) |
| 345 | }) |
| 346 | const stream = withScopeFinalizer( |
| 347 | Stream.make(1), |
| 348 | (exit) => |
| 349 | Effect.andThen( |
| 350 | Effect.sync(() => { |
| 351 | finalizerExits.push(exit) |
| 352 | }), |
| 353 | Effect.die(finalizerError) |
| 354 | ) |
| 355 | ) |
| 356 | |
| 357 | const thrown = yield* Effect.gen(function*() { |
| 358 | const iterator = (yield* Stream.toAsyncIterableEffect(stream))[Symbol.asyncIterator]() |
| 359 | yield* Effect.promise(() => iterator.next()) |
| 360 | return yield* Effect.promise(() => iterator.throw!(thrownError).catch((error) => error)) |
| 361 | }).pipe(Effect.withLogger(testLogger)) |
| 362 | |
| 363 | assert.strictEqual(thrown, thrownError) |
| 364 | assert.deepStrictEqual(finalizerExits, [Exit.die(thrownError)]) |
| 365 | assert.strictEqual(capturedLogs.length, 1) |
| 366 | })) |
| 367 | |
| 368 | it.effect("toAsyncIterable - throw interrupts an in-flight pull", () => |
| 369 | Effect.gen(function*() { |
| 370 | const started = yield* Deferred.make<void>() |
| 371 | let interrupted = false |
| 372 | const iterator = Stream.toAsyncIterable( |
| 373 | Stream.fromEffect( |
| 374 | Effect.andThen( |
| 375 | Deferred.succeed(started, void 0), |
| 376 | Effect.never |
| 377 | ).pipe( |
| 378 | Effect.onInterrupt(() => |
| 379 | Effect.sync(() => { |
| 380 | interrupted = true |
| 381 | }) |
| 382 | ) |
| 383 | ) |
| 384 | ) |
| 385 | )[Symbol.asyncIterator]() |
| 386 | const error = new Error("boom") |
| 387 | |
| 388 | const pending = iterator.next() |
| 389 | yield* Deferred.await(started) |
| 390 | const thrown = yield* Effect.promise(() => iterator.throw!(error).catch((error) => error)) |
| 391 | const pendingResult = yield* Effect.promise(() => pending) |
| 392 | |
| 393 | assert.strictEqual(thrown, error) |
| 394 | assert.deepStrictEqual(pendingResult, { done: true, value: undefined }) |
| 395 | assert.isTrue(interrupted) |
| 396 | })) |
| 397 | }) |
| 398 | |
| 399 | describe("constructors", () => { |
| 400 | class Greeter extends Context.Service<Greeter, { |
| 401 | readonly greet: (name: string) => string |
| 402 | }>()("Greeter") {} |
| 403 | |
| 404 | it.effect("range - min less than max", () => |
| 405 | Effect.gen(function*() { |
| 406 | const result = yield* Stream.range(1, 3).pipe(Stream.runCollect) |
| 407 | assert.deepStrictEqual(result, [1, 2, 3]) |
| 408 | })) |
| 409 | |
| 410 | it.effect("range - zero chunk size does not change the emitted range", () => |
| 411 | Effect.gen(function*() { |
| 412 | const result = yield* Stream.range(1, 3, 0).pipe( |
| 413 | Stream.take(4), |
| 414 | Stream.runCollect |
| 415 | ) |
| 416 | |
| 417 | assert.deepStrictEqual(result, [1, 2, 3]) |
| 418 | })) |
| 419 | |
| 420 | it.effect("range - normalizes the chunk size without changing emitted values", () => |
| 421 | Effect.gen(function*() { |
| 422 | const results = yield* Effect.forEach([Number.NaN, 0, 2.9], (chunkSize) => |
| 423 | Stream.range(1, 5, chunkSize).pipe( |
| 424 | Stream.chunks, |
| 425 | Stream.runCollect |
| 426 | )) |
| 427 | assert.deepStrictEqual(results, [ |
| 428 | [[1], [2], [3], [4], [5]], |
| 429 | [[1], [2], [3], [4], [5]], |
| 430 | [[1, 2], [3, 4], [5]] |
| 431 | ]) |
| 432 | })) |
| 433 | |
| 434 | it.effect("service", () => |
| 435 | Effect.gen(function*() { |
| 436 | const result = yield* Stream.service(Greeter).pipe( |
| 437 | Stream.map((greeter) => greeter.greet("World")), |
| 438 | Stream.provideService(Greeter, { |
| 439 | greet: (name) => `Hello, ${name}!` |
| 440 | }), |
| 441 | Stream.runCollect |
| 442 | ) |
| 443 | assert.deepStrictEqual(result, ["Hello, World!"]) |
| 444 | })) |
| 445 | |
| 446 | it.effect("serviceOption - some", () => |
| 447 | Effect.gen(function*() { |
| 448 | const result = yield* Stream.serviceOption(Greeter).pipe( |
| 449 | Stream.map((option) => Option.map(option, (greeter) => greeter.greet("World"))), |
| 450 | Stream.provideService(Greeter, { |
| 451 | greet: (name) => `Hello, ${name}!` |
| 452 | }), |
| 453 | Stream.runCollect |
| 454 | ) |
| 455 | assert.deepStrictEqual(result, [Option.some("Hello, World!")]) |
| 456 | })) |
| 457 | |
| 458 | it.effect("serviceOption - none", () => |
| 459 | Effect.gen(function*() { |
| 460 | const result = yield* Stream.serviceOption(Greeter).pipe(Stream.runCollect) |
| 461 | assert.deepStrictEqual(result, [Option.none()]) |
| 462 | })) |
| 463 | |
| 464 | it.effect("range - min greater than max", () => |
| 465 | Effect.gen(function*() { |
| 466 | const result = yield* Stream.range(4, 3).pipe(Stream.runCollect) |
| 467 | assert.deepStrictEqual(result, []) |
| 468 | })) |
| 469 | |
| 470 | it.effect("range - min equal to max", () => |
| 471 | Effect.gen(function*() { |
| 472 | const result = yield* Stream.range(3, 3).pipe(Stream.runCollect) |
| 473 | assert.deepStrictEqual(result, [3]) |
| 474 | })) |
| 475 | |
| 476 | it.effect("fromIteratorSucceed - normalizes the chunk size", () => |
| 477 | Effect.gen(function*() { |
| 478 | const results = yield* Effect.forEach([Number.NaN, -1, 1.9], (maxChunkSize) => |
| 479 | Stream.fromIteratorSucceed([1, 2, 3][Symbol.iterator](), maxChunkSize).pipe( |
| 480 | Stream.chunks, |
| 481 | Stream.runCollect |
| 482 | )) |
| 483 | assert.deepStrictEqual(results, [ |
| 484 | [[1], [2], [3]], |
| 485 | [[1], [2], [3]], |
| 486 | [[1], [2], [3]] |
| 487 | ]) |
| 488 | })) |
| 489 | |
| 490 | it.effect("fromIterable - emits array as one chunk by default", () => |
| 491 | Effect.gen(function*() { |
| 492 | const result = yield* Stream.fromIterable([1, 2, 3, 4]).pipe( |
| 493 | Stream.chunks, |
| 494 | Stream.runCollect |
| 495 | ) |
| 496 | assert.deepStrictEqual(result, [[1, 2, 3, 4]]) |
| 497 | })) |
| 498 | |
| 499 | it.effect("fromIterable - supports chunkSize option", () => |
| 500 | Effect.gen(function*() { |
| 501 | const result = yield* Stream.fromIterable([1, 2, 3, 4, 5], { chunkSize: 2 }).pipe( |
| 502 | Stream.chunks, |
| 503 | Stream.runCollect |
| 504 | ) |
| 505 | assert.deepStrictEqual(result, [[1, 2], [3, 4], [5]]) |
| 506 | })) |
| 507 | |
| 508 | it.effect("fromIterable - normalizes the chunk size", () => |
| 509 | Effect.gen(function*() { |
| 510 | const results = yield* Effect.forEach([Number.NaN, 0, 2.9], (chunkSize) => |
| 511 | Stream.fromIterable([1, 2, 3], { chunkSize }).pipe( |
| 512 | Stream.chunks, |
| 513 | Stream.runCollect |
| 514 | )) |
| 515 | assert.deepStrictEqual(results, [ |
| 516 | [[1], [2], [3]], |
| 517 | [[1], [2], [3]], |
| 518 | [[1, 2], [3]] |
| 519 | ]) |
| 520 | })) |
| 521 | |
| 522 | it.effect("scoped - provides scope to fromEffect pull effects", () => |
| 523 | Effect.gen(function*() { |
| 524 | const releases = yield* Ref.make(0) |
| 525 | const result = yield* Stream.fromEffect( |
| 526 | Effect.acquireRelease( |
| 527 | Effect.succeed("resource"), |
| 528 | () => Ref.update(releases, (n) => n + 1) |
| 529 | ) |
| 530 | ).pipe( |
| 531 | Stream.scoped, |
| 532 | Stream.runCollect |
| 533 | ) |
| 534 | |
| 535 | assert.deepStrictEqual(result, ["resource"]) |
| 536 | assert.strictEqual(yield* Ref.get(releases), 1) |
| 537 | })) |
| 538 | |
| 539 | it.effect("scoped - provides scope to sequential mapEffect pull effects", () => |
| 540 | Effect.gen(function*() { |
| 541 | const releases = yield* Ref.make(0) |
| 542 | const result = yield* Stream.fromIterable([1, 2]).pipe( |
| 543 | Stream.mapEffect((n) => |
| 544 | Effect.acquireRelease( |
| 545 | Effect.succeed(n * 2), |
| 546 | () => Ref.update(releases, (count) => count + 1) |
| 547 | ) |
| 548 | ), |
| 549 | Stream.scoped, |
| 550 | Stream.runCollect |
| 551 | ) |
| 552 | |
| 553 | assert.deepStrictEqual(result, [2, 4]) |
| 554 | assert.strictEqual(yield* Ref.get(releases), 2) |
| 555 | })) |
| 556 | |
| 557 | it.effect("fromReadableStream - errored streams fail with the mapped error, not a finalizer defect", () => |
| 558 | Effect.gen(function*() { |
| 559 | const exit = yield* Stream.fromReadableStream({ |
| 560 | evaluate: () => |
| 561 | new ReadableStream<number>({ |
| 562 | start(controller) { |
| 563 | controller.error(new Error("boom")) |
| 564 | } |
| 565 | }), |
| 566 | onError: (error) => new Error(`mapped: ${(error as Error).message}`) |
| 567 | }).pipe(Stream.runDrain, Effect.exit) |
| 568 | |
| 569 | assertTrue(Exit.isFailure(exit)) |
| 570 | if (Exit.isFailure(exit)) { |
| 571 | assertTrue(exit.cause.reasons.every(Cause.isFailReason)) |
| 572 | deepStrictEqual(Cause.squash(exit.cause), new Error("mapped: boom")) |
| 573 | } |
| 574 | })) |
| 575 | }) |
| 576 | |
| 577 | describe("encoding", () => { |
| 578 | it.effect("decodeText handles multi-byte characters split across chunks", () => |
| 579 | Effect.gen(function*() { |
| 580 | const bytes = new TextEncoder().encode("🌍") |
| 581 | const result = yield* Stream.make(bytes.slice(0, 2), bytes.slice(2)).pipe( |
| 582 | Stream.decodeText(), |
| 583 | Stream.mkString |
| 584 | ) |
| 585 | assert.strictEqual(result, "🌍") |
| 586 | })) |
| 587 | |
| 588 | it.effect("decodeText handles mixed ASCII and multi-byte characters across chunks", () => |
| 589 | Effect.gen(function*() { |
| 590 | const bytes = new TextEncoder().encode("Hello 🌍!") |
| 591 | const split = 8 |
| 592 | const result = yield* Stream.make(bytes.slice(0, split), bytes.slice(split)).pipe( |
| 593 | Stream.decodeText(), |
| 594 | Stream.mkString |
| 595 | ) |
| 596 | assert.strictEqual(result, "Hello 🌍!") |
| 597 | })) |
| 598 | |
| 599 | describe("splitLines", () => { |
| 600 | const splitLines = (chunks: ReadonlyArray<string>) => |
| 601 | Stream.fromIterable(chunks).pipe( |
| 602 | Stream.splitLines, |
| 603 | Stream.runCollect |
| 604 | ) |
| 605 | |
| 606 | it.effect("handles an empty stream", () => |
| 607 | Effect.gen(function*() { |
| 608 | const result = yield* splitLines([]) |
| 609 | assert.deepStrictEqual(result, []) |
| 610 | })) |
| 611 | |
| 612 | it.effect("handles empty chunks and repeated line feeds", () => |
| 613 | Effect.gen(function*() { |
| 614 | const result = yield* splitLines(["", "a\n\n", "", "b\n", ""]) |
| 615 | assert.deepStrictEqual(result, ["a", "", "b"]) |
| 616 | })) |
| 617 | |
| 618 | it.effect("handles line feeds across chunks", () => |
| 619 | Effect.gen(function*() { |
| 620 | const result = yield* splitLines(["a\nb", "\nc\n", "d"]) |
| 621 | assert.deepStrictEqual(result, ["a", "b", "c", "d"]) |
| 622 | })) |
| 623 | |
| 624 | it.effect("handles carriage return / line feed pairs across chunks", () => |
| 625 | Effect.gen(function*() { |
| 626 | const result = yield* splitLines(["a\r", "\nb\r", "\nc"]) |
| 627 | assert.deepStrictEqual(result, ["a", "b", "c"]) |
| 628 | })) |
| 629 | |
| 630 | it.effect("emits a carriage-return-terminated line before pulling upstream again", () => |
| 631 | Effect.gen(function*() { |
| 632 | const result = yield* Stream.succeed("a\r").pipe( |
| 633 | Stream.concat(Stream.fail("boom")), |
| 634 | Stream.splitLines, |
| 635 | Stream.take(1), |
| 636 | Stream.runCollect, |
| 637 | Effect.result |
| 638 | ) |
| 639 | assert.deepStrictEqual(result, Result.succeed(["a"])) |
| 640 | })) |
| 641 | |
| 642 | it.effect("emits the final line when the stream does not end with a newline", () => |
| 643 | Effect.gen(function*() { |
| 644 | const result = yield* splitLines(["a\nb\nc\n", "d\ne"]) |
| 645 | assert.deepStrictEqual(result, ["a", "b", "c", "d", "e"]) |
| 646 | })) |
| 647 | |
| 648 | it.effect("does not pull upstream again after flushing the final line", () => |
| 649 | Effect.gen(function*() { |
| 650 | let pulls = 0 |
| 651 | const stream = Stream.fromPull(Effect.sync(() => { |
| 652 | const pull = Effect.suspend( |
| 653 | (): Pull.Pull<Array.NonEmptyReadonlyArray<string>, string> => { |
| 654 | pulls++ |
| 655 | switch (pulls) { |
| 656 | case 1: |
| 657 | return Effect.succeed(Array.of("a")) |
| 658 | case 2: |
| 659 | return Cause.done() |
| 660 | default: |
| 661 | return Effect.fail("pulled after done") |
| 662 | } |
| 663 | } |
| 664 | ) |
| 665 | return pull |
| 666 | })) |
| 667 | |
| 668 | const result = yield* stream.pipe( |
| 669 | Stream.splitLines, |
| 670 | Stream.runCollect |
| 671 | ) |
| 672 | |
| 673 | assert.deepStrictEqual(result, ["a"]) |
| 674 | assert.strictEqual(pulls, 2) |
| 675 | })) |
| 676 | |
| 677 | it.effect("handles standalone carriage returns within a chunk", () => |
| 678 | Effect.gen(function*() { |
| 679 | const result = yield* splitLines(["a\rb\rc"]) |
| 680 | assert.deepStrictEqual(result, ["a", "b", "c"]) |
| 681 | })) |
| 682 | |
| 683 | it.effect("handles standalone carriage returns across chunk boundaries", () => |
| 684 | Effect.gen(function*() { |
| 685 | const result = yield* splitLines(["a\r", "b\r", "c"]) |
| 686 | assert.deepStrictEqual(result, ["a", "b", "c"]) |
| 687 | })) |
| 688 | |
| 689 | it.effect.prop( |
| 690 | "matches String.linesIterator regardless of chunk boundaries", |
| 691 | { |
| 692 | chunks: Schema.Array( |
| 693 | Schema.String.check(Schema.isPattern(/^[ab\n\r]*$/), Schema.isMaxLength(8)) |
| 694 | ).check(Schema.isMaxLength(8)) |
| 695 | }, |
| 696 | Effect.fnUntraced(function*({ chunks }) { |
| 697 | const result = yield* splitLines(chunks) |
| 698 | const expected = globalThis.Array.from(Str.linesIterator(chunks.join(""))) |
| 699 | assert.deepStrictEqual(result, expected) |
| 700 | }) |
| 701 | ) |
| 702 | }) |
| 703 | }) |
| 704 | |
| 705 | describe("filtering", () => { |
| 706 | it.effect("filterMap", () => |
| 707 | Effect.gen(function*() { |
| 708 | const result = yield* Stream.make(1, 2, 3, 4).pipe( |
| 709 | Stream.filterMap((n) => n % 2 === 0 ? Result.succeed(n + 10) : Result.failVoid), |
| 710 | Stream.runCollect |
| 711 | ) |
| 712 | assert.deepStrictEqual(result, [12, 14]) |
| 713 | })) |
| 714 | |
| 715 | it.effect("filterMapEffect", () => |
| 716 | Effect.gen(function*() { |
| 717 | const result = yield* Stream.make(1, 2, 3, 4).pipe( |
| 718 | Stream.filterMapEffect((n) => Effect.succeed(n % 2 === 0 ? Result.succeed(n + 1) : Result.failVoid)), |
| 719 | Stream.runCollect |
| 720 | ) |
| 721 | assert.deepStrictEqual(result, [3, 5]) |
| 722 | })) |
| 723 | }) |
| 724 | |
| 725 | describe("taking", () => { |
| 726 | it.effect("limitBytes - does not evaluate the fallback below the limit", () => |
| 727 | Effect.gen(function*() { |
| 728 | let evaluated = false |
| 729 | const chunks = [new Uint8Array([1, 2]), new Uint8Array([3, 4])] |
| 730 | const result = yield* Stream.fromIterable(chunks).pipe( |
| 731 | Stream.limitBytes("5 B", () => { |
| 732 | evaluated = true |
| 733 | return Stream.empty |
| 734 | }), |
| 735 | Stream.runCollect |
| 736 | ) |
| 737 | |
| 738 | assert.deepStrictEqual(result, chunks) |
| 739 | assert.isFalse(evaluated) |
| 740 | })) |
| 741 | |
| 742 | it.effect("limitBytes - does not evaluate the fallback at the limit", () => |
| 743 | Effect.gen(function*() { |
| 744 | let evaluated = false |
| 745 | const chunks = [new Uint8Array([1, 2]), new Uint8Array([3, 4])] |
| 746 | const result = yield* Stream.fromIterable(chunks).pipe( |
| 747 | Stream.limitBytes(ByteSize.bytes(4), () => { |
| 748 | evaluated = true |
| 749 | return Stream.empty |
| 750 | }), |
| 751 | Stream.runCollect |
| 752 | ) |
| 753 | |
| 754 | assert.deepStrictEqual(result, chunks) |
| 755 | assert.isFalse(evaluated) |
| 756 | })) |
| 757 | |
| 758 | it.effect("limitBytes - drops the crossing chunk and switches to the fallback", () => |
| 759 | Effect.gen(function*() { |
| 760 | const first = new Uint8Array([1, 2]) |
| 761 | const crossing = new Uint8Array([3, 4, 5, 6]) |
| 762 | const after = new Uint8Array([7]) |
| 763 | const fallback = new Uint8Array([8, 9]) |
| 764 | const result = yield* Stream.make(first, crossing, after).pipe( |
| 765 | Stream.limitBytes(ByteSize.bytes(5), () => Stream.succeed(fallback)), |
| 766 | Stream.runCollect |
| 767 | ) |
| 768 | |
| 769 | assert.deepStrictEqual(result, [first, fallback]) |
| 770 | })) |
| 771 | |
| 772 | it.effect("take - pulls the first `n` values from a stream", () => |
| 773 | Effect.gen(function*() { |
| 774 | const result = yield* Stream.range(1, 5).pipe( |
| 775 | Stream.take(3), |
| 776 | Stream.runCollect |
| 777 | ) |
| 778 | assert.deepStrictEqual(result, [1, 2, 3]) |
| 779 | })) |
| 780 | |
| 781 | it.effect("take - rounds positive fractional counts down", () => |
| 782 | Effect.gen(function*() { |
| 783 | const results = yield* Effect.forEach([0.5, 1.9, 2.9], (n) => |
| 784 | Stream.make(1, 2, 3).pipe( |
| 785 | Stream.take(n), |
| 786 | Stream.runCollect |
| 787 | )) |
| 788 | assert.deepStrictEqual(results, [[], [1], [1, 2]]) |
| 789 | })) |
| 790 | |
| 791 | it.effect("take - short-circuits stream evaluation", () => |
| 792 | Effect.gen(function*() { |
| 793 | const result = yield* Stream.succeed(1).pipe( |
| 794 | Stream.concat(Stream.never), |
| 795 | Stream.take(1), |
| 796 | Stream.runCollect |
| 797 | ) |
| 798 | assert.deepStrictEqual(result, [1]) |
| 799 | })) |
| 800 | |
| 801 | it.effect("take - taking 0 short-circuits stream evaluation", () => |
| 802 | Effect.gen(function*() { |
| 803 | const result = yield* Stream.never.pipe( |
| 804 | Stream.take(0), |
| 805 | Stream.runCollect |
| 806 | ) |
| 807 | assert.deepStrictEqual(result, []) |
| 808 | })) |
| 809 | |
| 810 | it.effect("take - treating NaN as a non-positive count", () => |
| 811 | Effect.gen(function*() { |
| 812 | const result = yield* Stream.make(1, 2, 3).pipe( |
| 813 | Stream.take(Number.NaN), |
| 814 | Stream.runCollect |
| 815 | ) |
| 816 | assert.deepStrictEqual(result, []) |
| 817 | })) |
| 818 | |
| 819 | it.effect("take - NaN short-circuits stream evaluation", () => |
| 820 | Effect.gen(function*() { |
| 821 | const result = yield* Stream.never.pipe( |
| 822 | Stream.take(Number.NaN), |
| 823 | Stream.runCollect |
| 824 | ) |
| 825 | assert.deepStrictEqual(result, []) |
| 826 | })) |
| 827 | |
| 828 | it.effect("takeUntil - takes elements until a predicate is satisfied", () => |
| 829 | Effect.gen(function*() { |
| 830 | const result = yield* Stream.range(1, 5).pipe( |
| 831 | Stream.takeUntil((n) => n % 3 === 0), |
| 832 | Stream.runCollect |
| 833 | ) |
| 834 | assert.deepStrictEqual(result, [1, 2, 3]) |
| 835 | })) |
| 836 | |
| 837 | it.effect("takeWhile - takes elements while a predicate is satisfied", () => |
| 838 | Effect.gen(function*() { |
| 839 | const result = yield* Stream.range(1, 5).pipe( |
| 840 | Stream.takeWhile((n) => n % 3 !== 0), |
| 841 | Stream.runCollect |
| 842 | ) |
| 843 | assert.deepStrictEqual(result, [1, 2]) |
| 844 | })) |
| 845 | |
| 846 | it.effect("takeWhileFilter - takes elements while a filter succeeds", () => |
| 847 | Effect.gen(function*() { |
| 848 | const result = yield* Stream.range(1, 5).pipe( |
| 849 | Stream.takeWhileFilter((n) => n < 3 ? Result.succeed(n + 10) : Result.failVoid), |
| 850 | Stream.runCollect |
| 851 | ) |
| 852 | assert.deepStrictEqual(result, [11, 12]) |
| 853 | })) |
| 854 | |
| 855 | it.effect("takeUntilEffect - takes elements until an effectful predicate is satisfied", () => |
| 856 | Effect.gen(function*() { |
| 857 | const result = yield* Stream.range(1, 5).pipe( |
| 858 | Stream.takeUntilEffect((n) => Effect.succeed(n % 3 === 0)), |
| 859 | Stream.runCollect |
| 860 | ) |
| 861 | assert.deepStrictEqual(result, [1, 2, 3]) |
| 862 | })) |
| 863 | |
| 864 | it.effect("takeWhileEffect - takes elements while an effectful predicate is satisfied", () => |
| 865 | Effect.gen(function*() { |
| 866 | const result = yield* Stream.range(1, 5).pipe( |
| 867 | Stream.takeWhileEffect((n) => Effect.succeed(n % 3 !== 0)), |
| 868 | Stream.runCollect |
| 869 | ) |
| 870 | assert.deepStrictEqual(result, [1, 2]) |
| 871 | })) |
| 872 | |
| 873 | it.effect("takeRight", () => |
| 874 | Effect.gen(function*() { |
| 875 | const take = 3 |
| 876 | const stream = Stream.range(1, 5) |
| 877 | const { result1, result2 } = yield* (Effect.all({ |
| 878 | result1: pipe(stream, Stream.takeRight(take), Stream.runCollect), |
| 879 | result2: pipe(Stream.runCollect(stream), Effect.map(Array.takeRight(take))) |
| 880 | })) |
| 881 | deepStrictEqual(result1, result2) |
| 882 | })) |
| 883 | |
| 884 | it.effect("takeRight - normalizes the element count", () => |
| 885 | Effect.gen(function*() { |
| 886 | const results = yield* Effect.forEach([Number.NaN, -1, 0.5, 1.9, 2.9], (n) => |
| 887 | Stream.make(1, 2, 3).pipe( |
| 888 | Stream.takeRight(n), |
| 889 | Stream.runCollect |
| 890 | )) |
| 891 | assert.deepStrictEqual(results, [[], [], [], [3], [2, 3]]) |
| 892 | })) |
| 893 | |
| 894 | it.effect("takeRight - zero normalized counts do not evaluate the upstream", () => |
| 895 | Effect.gen(function*() { |
| 896 | const result = yield* Stream.fromEffect(Effect.die("upstream evaluated")).pipe( |
| 897 | Stream.takeRight(Number.NaN), |
| 898 | Stream.runCollect |
| 899 | ) |
| 900 | assert.deepStrictEqual(result, []) |
| 901 | })) |
| 902 | }) |
| 903 | |
| 904 | describe("pagination", () => { |
| 905 | it.effect("paginate", () => |
| 906 | Effect.gen(function*() { |
| 907 | const s: readonly [ReadonlyArray<number>, Array<number>] = [[0], [1, 2, 3, 4, 5]] |
| 908 | const pageSize = 2 |
| 909 | const result = yield* Stream.paginate(s, ([chunk, nums]) => |
| 910 | nums.length === 0 ? |
| 911 | Effect.succeed([chunk, Option.none<readonly [ReadonlyArray<number>, Array<number>]>()] as const) : |
| 912 | Effect.succeed( |
| 913 | [ |
| 914 | chunk, |
| 915 | Option.some( |
| 916 | [ |
| 917 | nums.slice(0, pageSize), |
| 918 | nums.slice(pageSize) |
| 919 | ] as const |
| 920 | ) |
| 921 | ] as const |
| 922 | )).pipe(Stream.runCollect) |
| 923 | assert.deepStrictEqual(result, [0, 1, 2, 3, 4, 5]) |
| 924 | })) |
| 925 | }) |
| 926 | |
| 927 | describe("error handling", () => { |
| 928 | it.effect("catch", () => |
| 929 | Effect.gen(function*() { |
| 930 | let error: string | undefined = undefined |
| 931 | const results = yield* Stream.make(1, 2, 3).pipe( |
| 932 | Stream.concat(Stream.fail("boom")), |
| 933 | Stream.catch((error_) => { |
| 934 | error = error_ |
| 935 | return Stream.make(4, 5, 6) |
| 936 | }), |
| 937 | Stream.runCollect |
| 938 | ) |
| 939 | assert.deepStrictEqual(results, [1, 2, 3, 4, 5, 6]) |
| 940 | assert.strictEqual(error, "boom") |
| 941 | })) |
| 942 | |
| 943 | it.effect("tapCause preserves failures", () => |
| 944 | Effect.gen(function*() { |
| 945 | const exit = yield* Stream.fail("boom").pipe( |
| 946 | Stream.tapCause(() => Effect.void), |
| 947 | Stream.runCollect, |
| 948 | Effect.exit |
| 949 | ) |
| 950 | assertExitFailure(exit, Cause.fail("boom")) |
| 951 | })) |
| 952 | |
| 953 | it.effect("tapCause preserves defects", () => |
| 954 | Effect.gen(function*() { |
| 955 | const defect = new Error("boom") |
| 956 | const exit = yield* Stream.die(defect).pipe( |
| 957 | Stream.tapCause(() => Effect.void), |
| 958 | Stream.runCollect, |
| 959 | Effect.exit |
| 960 | ) |
| 961 | assertExitFailure(exit, Cause.die(defect)) |
| 962 | })) |
| 963 | |
| 964 | it.effect("catchDefect", () => |
| 965 | Effect.gen(function*() { |
| 966 | const defect = new Error("boom") |
| 967 | const recovered = yield* Stream.die(defect).pipe( |
| 968 | Stream.catchDefect((caught) => Stream.succeed(caught)), |
| 969 | Stream.runCollect |
| 970 | ) |
| 971 | const failed = yield* Stream.fail("failure").pipe( |
| 972 | Stream.catchDefect(() => Stream.succeed("recovered")), |
| 973 | Stream.runCollect, |
| 974 | Effect.exit |
| 975 | ) |
| 976 | assert.deepStrictEqual(recovered, [defect]) |
| 977 | assertExitFailure(failed, Cause.fail("failure")) |
| 978 | })) |
| 979 | |
| 980 | it.effect("catchIf with refinement", () => |
| 981 | Effect.gen(function*() { |
| 982 | interface ErrorA { |
| 983 | readonly _tag: "ErrorA" |
| 984 | } |
| 985 | interface ErrorB { |
| 986 | readonly _tag: "ErrorB" |
| 987 | } |
| 988 | const stream: Stream.Stream<never, ErrorA | ErrorB> = Stream.fail({ _tag: "ErrorB" as const }) |
| 989 | const result = yield* pipe( |
| 990 | stream, |
| 991 | Stream.catchIf((error): error is ErrorA => error._tag === "ErrorA", () => Stream.succeed("ok")), |
| 992 | Stream.runCollect, |
| 993 | Effect.exit |
| 994 | ) |
| 995 | assert.deepStrictEqual(result, Exit.fail({ _tag: "ErrorB" as const })) |
| 996 | })) |
| 997 | |
| 998 | it.effect("catchIf with refinement orElse", () => |
| 999 | Effect.gen(function*() { |
| 1000 | interface ErrorA { |
| 1001 | readonly _tag: "ErrorA" |
| 1002 | } |
| 1003 | interface ErrorB { |
| 1004 | readonly _tag: "ErrorB" |
| 1005 | } |
| 1006 | const result = yield* (Stream.fail({ _tag: "ErrorB" as const }) as Stream.Stream<never, ErrorA | ErrorB>).pipe( |
| 1007 | Stream.catchIf( |
| 1008 | (error): error is ErrorA => error._tag === "ErrorA", |
| 1009 | () => Stream.succeed("caught"), |
| 1010 | () => Stream.succeed("fallback") |
| 1011 | ), |
| 1012 | Stream.runCollect |
| 1013 | ) |
| 1014 | assert.deepStrictEqual(result, ["fallback"]) |
| 1015 | })) |
| 1016 | |
| 1017 | it.effect("catchIf with predicate", () => |
| 1018 | Effect.gen(function*() { |
| 1019 | const result = yield* pipe( |
| 1020 | Stream.fail("boom" as string | number), |
| 1021 | Stream.catchIf( |
| 1022 | (e) => typeof e === "string", |
| 1023 | (e) => Stream.succeed(`caught: ${e}`) |
| 1024 | ), |
| 1025 | Stream.runCollect |
| 1026 | ) |
| 1027 | assert.deepStrictEqual(result, ["caught: boom"]) |
| 1028 | })) |
| 1029 | |
| 1030 | it.effect("catchIf predicate no match", () => |
| 1031 | Effect.gen(function*() { |
| 1032 | const result = yield* pipe( |
| 1033 | Stream.fail(42 as string | number), |
| 1034 | Stream.catchIf( |
| 1035 | (e) => typeof e === "string", |
| 1036 | () => Stream.succeed("caught") |
| 1037 | ), |
| 1038 | Stream.runCollect, |
| 1039 | Effect.exit |
| 1040 | ) |
| 1041 | assert.deepStrictEqual(result, Exit.fail(42)) |
| 1042 | })) |
| 1043 | |
| 1044 | it.effect("catchIf with filter input", () => |
| 1045 | Effect.gen(function*() { |
| 1046 | const matched = yield* Stream.catchFilter( |
| 1047 | Stream.fail("boom" as string | number), |
| 1048 | (e: string | number) => typeof e === "string" ? Result.succeed(e.length) : Result.fail(`fallback: ${e}`), |
| 1049 | (length) => Stream.succeed(`caught: ${length}`), |
| 1050 | (failure) => Stream.succeed(failure) |
| 1051 | ).pipe(Stream.runCollect) |
| 1052 | const unmatched = yield* Stream.catchFilter( |
| 1053 | Stream.fail(42 as string | number), |
| 1054 | (e: string | number) => typeof e === "string" ? Result.succeed(e.length) : Result.fail(`fallback: ${e}`), |
| 1055 | (length) => Stream.succeed(`caught: ${length}`), |
| 1056 | (failure) => Stream.succeed(failure) |
| 1057 | ).pipe(Stream.runCollect) |
| 1058 | assert.deepStrictEqual(matched, ["caught: 4"]) |
| 1059 | assert.deepStrictEqual(unmatched, ["fallback: 42"]) |
| 1060 | })) |
| 1061 | |
| 1062 | it.effect("catchCauseFilter", () => |
| 1063 | Effect.gen(function*() { |
| 1064 | const recovered = yield* Stream.fail("boom").pipe( |
| 1065 | Stream.catchCauseFilter( |
| 1066 | (cause) => Cause.hasFails(cause) ? Result.succeed(Cause.squash(cause)) : Result.fail(cause), |
| 1067 | (failure) => Stream.succeed(`recovered: ${failure}`) |
| 1068 | ), |
| 1069 | Stream.runCollect |
| 1070 | ) |
| 1071 | assert.deepStrictEqual(recovered, ["recovered: boom"]) |
| 1072 | })) |
| 1073 | |
| 1074 | it.effect("catchTag orElse", () => |
| 1075 | Effect.gen(function*() { |
| 1076 | class HttpError extends Data.TaggedError("HttpError")<{ |
| 1077 | readonly message: string |
| 1078 | }> {} |
| 1079 | class ValidationError extends Data.TaggedError("ValidationError")<{ |
| 1080 | readonly field: string |
| 1081 | }> {} |
| 1082 | const result = yield* Stream.catchTag( |
| 1083 | Stream.fail(new ValidationError({ field: "email" })) as Stream.Stream<never, HttpError | ValidationError>, |
| 1084 | "HttpError", |
| 1085 | () => Stream.succeed("http"), |
| 1086 | () => Stream.succeed("fallback") |
| 1087 | ).pipe(Stream.runCollect) |
| 1088 | assert.deepStrictEqual(result, ["fallback"]) |
| 1089 | })) |
| 1090 | |
| 1091 | describe("ignore", () => { |
| 1092 | type IgnoreOptions = { readonly log?: boolean | LogLevel.Severity } |
| 1093 | |
| 1094 | const makeTestLogger = () => { |
| 1095 | const capturedLogs: Array<{ |
| 1096 | readonly logLevel: LogLevel.LogLevel |
| 1097 | readonly cause: Cause.Cause<unknown> |
| 1098 | }> = [] |
| 1099 | const testLogger = Logger.make<unknown, void>((options) => { |
| 1100 | capturedLogs.push({ logLevel: options.logLevel, cause: options.cause }) |
| 1101 | }) |
| 1102 | return { capturedLogs, testLogger } |
| 1103 | } |
| 1104 | |
| 1105 | const runIgnore = (options?: IgnoreOptions, currentLogLevel: LogLevel.Severity = "Info") => |
| 1106 | Effect.gen(function*() { |
| 1107 | const { capturedLogs, testLogger } = makeTestLogger() |
| 1108 | const program = options === undefined |
| 1109 | ? Stream.fail("boom").pipe(Stream.ignore, Stream.runDrain) |
| 1110 | : Stream.fail("boom").pipe(Stream.ignore(options), Stream.runDrain) |
| 1111 | yield* program.pipe( |
| 1112 | Effect.provide(Logger.layer([testLogger])), |
| 1113 | Effect.provideService(References.MinimumLogLevel, "Trace"), |
| 1114 | Effect.provideService(References.CurrentLogLevel, currentLogLevel) |
| 1115 | ) |
| 1116 | return capturedLogs |
| 1117 | }) |
| 1118 | |
| 1119 | it.effect("does not log when log is omitted", () => |
| 1120 | Effect.gen(function*() { |
| 1121 | const logs = yield* runIgnore() |
| 1122 | assert.strictEqual(logs.length, 0) |
| 1123 | })) |
| 1124 | |
| 1125 | it.effect("does not log when log is false", () => |
| 1126 | Effect.gen(function*() { |
| 1127 | const logs = yield* runIgnore({ log: false }) |
| 1128 | assert.strictEqual(logs.length, 0) |
| 1129 | })) |
| 1130 | |
| 1131 | it.effect("logs with the current level when log is true", () => |
| 1132 | Effect.gen(function*() { |
| 1133 | const logs = yield* runIgnore({ log: true }, "Warn") |
| 1134 | assert.strictEqual(logs.length, 1) |
| 1135 | assert.strictEqual(logs[0].logLevel, "Warn") |
| 1136 | assertCauseFail(logs[0].cause, "boom") |
| 1137 | })) |
| 1138 | |
| 1139 | it.effect("logs with the provided level when log is a LogLevel", () => |
| 1140 | Effect.gen(function*() { |
| 1141 | const logs = yield* runIgnore({ log: "Error" }, "Warn") |
| 1142 | assert.strictEqual(logs.length, 1) |
| 1143 | assert.strictEqual(logs[0].logLevel, "Error") |
| 1144 | assertCauseFail(logs[0].cause, "boom") |
| 1145 | })) |
| 1146 | }) |
| 1147 | |
| 1148 | describe("catchReason", () => { |
| 1149 | class RateLimitError extends Data.TaggedError("RateLimitError")<{ |
| 1150 | readonly retryAfter: number |
| 1151 | }> {} |
| 1152 | |
| 1153 | class QuotaExceededError extends Data.TaggedError("QuotaExceededError")<{ |
| 1154 | readonly limit: number |
| 1155 | }> {} |
| 1156 | |
| 1157 | class AiError extends Data.TaggedError("AiError")<{ |
| 1158 | readonly reason: RateLimitError | QuotaExceededError |
| 1159 | }> {} |
| 1160 | |
| 1161 | class OtherError extends Data.TaggedError("OtherError")<{ |
| 1162 | readonly message: string |
| 1163 | }> {} |
| 1164 | |
| 1165 | it.effect("catches matching reason - handler succeeds", () => |
| 1166 | Effect.gen(function*() { |
| 1167 | const result = yield* Stream.fail( |
| 1168 | new AiError({ reason: new RateLimitError({ retryAfter: 60 }) }) |
| 1169 | ).pipe( |
| 1170 | Stream.catchReason("AiError", "RateLimitError", (r) => Stream.succeed(`retry: ${r.retryAfter}`)), |
| 1171 | Stream.runCollect |
| 1172 | ) |
| 1173 | assert.deepStrictEqual(result, ["retry: 60"]) |
| 1174 | })) |
| 1175 | |
| 1176 | it.effect("catches matching reason - handler fails", () => |
| 1177 | Effect.gen(function*() { |
| 1178 | const reason = new RateLimitError({ retryAfter: 60 }) |
| 1179 | const error = new OtherError({ message: "handled" }) |
| 1180 | const exit = yield* Stream.fail(new AiError({ reason })).pipe( |
| 1181 | Stream.catchReason("AiError", "RateLimitError", () => Stream.fail(error)), |
| 1182 | Stream.runCollect, |
| 1183 | Effect.exit |
| 1184 | ) |
| 1185 | assertExitFailure(exit, Cause.fail(error)) |
| 1186 | })) |
| 1187 | |
| 1188 | it.effect("ignores non-matching reason", () => |
| 1189 | Effect.gen(function*() { |
| 1190 | const reason = new QuotaExceededError({ limit: 100 }) |
| 1191 | const error = new AiError({ reason }) |
| 1192 | const exit = yield* Stream.fail(error).pipe( |
| 1193 | Stream.catchReason("AiError", "RateLimitError", () => Stream.succeed("no")), |
| 1194 | Stream.runCollect, |
| 1195 | Effect.exit |
| 1196 | ) |
| 1197 | assertExitFailure(exit, Cause.fail(error)) |
| 1198 | })) |
| 1199 | |
| 1200 | it.effect("handles non-matching reason with orElse", () => |
| 1201 | Effect.gen(function*() { |
| 1202 | const result = yield* Stream.fail( |
| 1203 | new AiError({ reason: new QuotaExceededError({ limit: 100 }) }) |
| 1204 | ).pipe( |
| 1205 | Stream.catchReason( |
| 1206 | "AiError", |
| 1207 | "RateLimitError", |
| 1208 | (reason) => Stream.succeed(`retry: ${reason.retryAfter}`), |
| 1209 | (reason) => Stream.succeed(`quota: ${reason.limit}`) |
| 1210 | ), |
| 1211 | Stream.runCollect |
| 1212 | ) |
| 1213 | assert.deepStrictEqual(result, ["quota: 100"]) |
| 1214 | })) |
| 1215 | |
| 1216 | it.effect("ignores non-matching parent tag", () => |
| 1217 | Effect.gen(function*() { |
| 1218 | const error = new OtherError({ message: "test" }) |
| 1219 | const exit = yield* (Stream.fail(error) as Stream.Stream<never, AiError | OtherError>).pipe( |
| 1220 | Stream.catchReason("AiError", "RateLimitError", () => Stream.succeed("no")), |
| 1221 | Stream.runCollect, |
| 1222 | Effect.exit |
| 1223 | ) |
| 1224 | assertExitFailure(exit, Cause.fail(error)) |
| 1225 | })) |
| 1226 | |
| 1227 | it.effect("orElse ignores non-matching parent tag", () => |
| 1228 | Effect.gen(function*() { |
| 1229 | const error = new OtherError({ message: "test" }) |
| 1230 | const exit = yield* (Stream.fail(error) as Stream.Stream<never, AiError | OtherError>).pipe( |
| 1231 | Stream.catchReason( |
| 1232 | "AiError", |
| 1233 | "RateLimitError", |
| 1234 | () => Stream.succeed("no"), |
| 1235 | () => Stream.succeed("fallback") |
| 1236 | ), |
| 1237 | Stream.runCollect, |
| 1238 | Effect.exit |
| 1239 | ) |
| 1240 | assertExitFailure(exit, Cause.fail(error)) |
| 1241 | })) |
| 1242 | }) |
| 1243 | |
| 1244 | describe("catchReasons", () => { |
| 1245 | class RateLimitError extends Data.TaggedError("RateLimitError")<{ |
| 1246 | readonly retryAfter: number |
| 1247 | }> {} |
| 1248 | |
| 1249 | class QuotaExceededError extends Data.TaggedError("QuotaExceededError")<{ |
| 1250 | readonly limit: number |
| 1251 | }> {} |
| 1252 | |
| 1253 | class AiError extends Data.TaggedError("AiError")<{ |
| 1254 | readonly reason: RateLimitError | QuotaExceededError |
| 1255 | }> {} |
| 1256 | |
| 1257 | it.effect("catches matching reason", () => |
| 1258 | Effect.gen(function*() { |
| 1259 | const result = yield* Stream.fail( |
| 1260 | new AiError({ reason: new RateLimitError({ retryAfter: 60 }) }) |
| 1261 | ).pipe( |
| 1262 | Stream.catchReasons("AiError", { |
| 1263 | RateLimitError: (r) => Stream.succeed(`retry: ${r.retryAfter}`) |
| 1264 | }), |
| 1265 | Stream.runCollect |
| 1266 | ) |
| 1267 | assert.deepStrictEqual(result, ["retry: 60"]) |
| 1268 | })) |
| 1269 | |
| 1270 | it.effect("ignores non-matching reason", () => |
| 1271 | Effect.gen(function*() { |
| 1272 | const reason = new QuotaExceededError({ limit: 100 }) |
| 1273 | const error = new AiError({ reason }) |
| 1274 | const exit = yield* Stream.fail(error).pipe( |
| 1275 | Stream.catchReasons("AiError", { |
| 1276 | RateLimitError: () => Stream.succeed("no") |
| 1277 | }), |
| 1278 | Stream.runCollect, |
| 1279 | Effect.exit |
| 1280 | ) |
| 1281 | assertExitFailure(exit, Cause.fail(error)) |
| 1282 | })) |
| 1283 | |
| 1284 | it.effect("handles non-matching reason with orElse", () => |
| 1285 | Effect.gen(function*() { |
| 1286 | const result = yield* Stream.fail( |
| 1287 | new AiError({ reason: new RateLimitError({ retryAfter: 60 }) }) |
| 1288 | ).pipe( |
| 1289 | Stream.catchReasons( |
| 1290 | "AiError", |
| 1291 | { |
| 1292 | QuotaExceededError: (reason) => Stream.succeed(`quota: ${reason.limit}`) |
| 1293 | }, |
| 1294 | (reason) => Stream.succeed(`fallback: ${reason._tag}`) |
| 1295 | ), |
| 1296 | Stream.runCollect |
| 1297 | ) |
| 1298 | assert.deepStrictEqual(result, ["fallback: RateLimitError"]) |
| 1299 | })) |
| 1300 | }) |
| 1301 | |
| 1302 | describe("ignoreCause", () => { |
| 1303 | type IgnoreCauseOptions = { readonly log?: boolean | LogLevel.Severity } |
| 1304 | |
| 1305 | const makeTestLogger = () => { |
| 1306 | const capturedLogs: Array<{ |
| 1307 | readonly logLevel: LogLevel.LogLevel |
| 1308 | readonly cause: Cause.Cause<unknown> |
| 1309 | }> = [] |
| 1310 | const testLogger = Logger.make<unknown, void>((options) => { |
| 1311 | capturedLogs.push({ logLevel: options.logLevel, cause: options.cause }) |
| 1312 | }) |
| 1313 | return { capturedLogs, testLogger } |
| 1314 | } |
| 1315 | |
| 1316 | const runIgnoreCause = ( |
| 1317 | options?: IgnoreCauseOptions, |
| 1318 | currentLogLevel: LogLevel.Severity = "Info" |
| 1319 | ) => |
| 1320 | Effect.gen(function*() { |
| 1321 | const stream: Stream.Stream<never, string, never> = Stream.fail("boom") |
| 1322 | const program: Effect.Effect<Array<never>, never, never> = options === undefined |
| 1323 | ? stream.pipe(Stream.ignoreCause, Stream.runCollect) |
| 1324 | : stream.pipe(Stream.ignoreCause(options), Stream.runCollect) |
| 1325 | yield* Effect.scope |
| 1326 | const { capturedLogs, testLogger } = makeTestLogger() |
| 1327 | yield* program.pipe( |
| 1328 | Effect.withLogger(testLogger), |
| 1329 | Effect.provideService(References.MinimumLogLevel, "Trace"), |
| 1330 | Effect.provideService(References.CurrentLogLevel, currentLogLevel) |
| 1331 | ) |
| 1332 | return capturedLogs |
| 1333 | }) |
| 1334 | |
| 1335 | it.effect("does not log when log is omitted", () => |
| 1336 | Effect.gen(function*() { |
| 1337 | const logs = yield* runIgnoreCause() |
| 1338 | assert.strictEqual(logs.length, 0) |
| 1339 | })) |
| 1340 | |
| 1341 | it.effect("does not log when log is false", () => |
| 1342 | Effect.gen(function*() { |
| 1343 | const logs = yield* runIgnoreCause({ log: false }) |
| 1344 | assert.strictEqual(logs.length, 0) |
| 1345 | })) |
| 1346 | |
| 1347 | it.effect("logs with the current level when log is true", () => |
| 1348 | Effect.gen(function*() { |
| 1349 | const logs = yield* runIgnoreCause({ log: true }, "Warn") |
| 1350 | assert.strictEqual(logs.length, 1) |
| 1351 | assert.strictEqual(logs[0].logLevel, "Warn") |
| 1352 | assertCauseFail(logs[0].cause, "boom") |
| 1353 | })) |
| 1354 | |
| 1355 | it.effect("logs with the provided level when log is a LogLevel", () => |
| 1356 | Effect.gen(function*() { |
| 1357 | const logs = yield* runIgnoreCause({ log: "Error" }, "Warn") |
| 1358 | assert.strictEqual(logs.length, 1) |
| 1359 | assert.strictEqual(logs[0].logLevel, "Error") |
| 1360 | assertCauseFail(logs[0].cause, "boom") |
| 1361 | })) |
| 1362 | }) |
| 1363 | }) |
| 1364 | |
| 1365 | describe("scanning", () => { |
| 1366 | it.effect("scan emits the initial state for Stream.empty", () => |
| 1367 | Effect.gen(function*() { |
| 1368 | const result = yield* Stream.empty.pipe( |
| 1369 | Stream.scan(() => 0, (acc, curr: number) => acc + curr), |
| 1370 | Stream.runCollect |
| 1371 | ) |
| 1372 | assert.deepStrictEqual(result, [0]) |
| 1373 | })) |
| 1374 | |
| 1375 | it.effect("scan", () => |
| 1376 | Effect.gen(function*() { |
| 1377 | const stream = Stream.make(1, 2, 3, 4, 5) |
| 1378 | const { result1, result2 } = yield* Effect.all({ |
| 1379 | result1: stream.pipe(Stream.scan(() => 0, (acc, curr) => acc + curr), Stream.runCollect), |
| 1380 | result2: Stream.runCollect(stream).pipe( |
| 1381 | Effect.map((chunk) => Array.scan(chunk, 0, (acc, curr) => acc + curr)) |
| 1382 | ) |
| 1383 | }) |
| 1384 | assert.deepStrictEqual(result1, result2) |
| 1385 | })) |
| 1386 | |
| 1387 | it.effect("scanEffect", () => |
| 1388 | Effect.gen(function*() { |
| 1389 | const result = yield* Stream.make(1, 2, 3, 4, 5).pipe( |
| 1390 | Stream.scanEffect(() => 0, (acc, curr) => Effect.succeed(acc + curr)), |
| 1391 | Stream.runCollect |
| 1392 | ) |
| 1393 | |
| 1394 | assert.deepStrictEqual(result, Array.scan([1, 2, 3, 4, 5], 0, (acc, curr) => acc + curr)) |
| 1395 | })) |
| 1396 | |
| 1397 | it.effect("mapAccumArrayEffect data-first", () => |
| 1398 | Effect.gen(function*() { |
| 1399 | const result = yield* Stream.mapAccumArrayEffect( |
| 1400 | Stream.make(1, 2, 3), |
| 1401 | () => 0, |
| 1402 | (sum, values) => Effect.succeed([sum + values.length, values] as const) |
| 1403 | ).pipe(Stream.runCollect) |
| 1404 | |
| 1405 | assert.deepStrictEqual(result, [1, 2, 3]) |
| 1406 | })) |
| 1407 | }) |
| 1408 | |
| 1409 | describe("grouping", () => { |
| 1410 | it.effect("groupBy", () => |
| 1411 | Effect.gen(function*() { |
| 1412 | const stream = Stream.make(1, 2, 3, 4, 5) |
| 1413 | const grouped = yield* stream.pipe( |
| 1414 | Stream.groupByKey((n) => n % 2 === 0 ? "even" : "odd"), |
| 1415 | Stream.mapEffect( |
| 1416 | Effect.fnUntraced(function*([key, stream]) { |
| 1417 | return [key, yield* Stream.runCollect(stream)] as const |
| 1418 | }), |
| 1419 | { concurrency: "unbounded" } |
| 1420 | ), |
| 1421 | Stream.runCollect |
| 1422 | ) |
| 1423 | assert.deepStrictEqual(grouped, [ |
| 1424 | ["odd", [1, 3, 5]], |
| 1425 | ["even", [2, 4]] |
| 1426 | ]) |
| 1427 | })) |
| 1428 | }) |
| 1429 | |
| 1430 | describe("concat", () => { |
| 1431 | class CountingScheduler extends Scheduler.MixedScheduler { |
| 1432 | ops = 0 |
| 1433 | override shouldYield() { |
| 1434 | this.ops++ |
| 1435 | return false |
| 1436 | } |
| 1437 | } |
| 1438 | |
| 1439 | it.effect("work per part does not grow with the length of a chain", () => |
| 1440 | Effect.gen(function*() { |
| 1441 | const countOps = (n: number, nest: "left" | "right") => { |
| 1442 | let stream: Stream.Stream<number> = Stream.make(0) |
| 1443 | for (let i = 1; i < n; i++) { |
| 1444 | stream = nest === "left" ? Stream.concat(stream, Stream.make(i)) : Stream.concat(Stream.make(i), stream) |
| 1445 | } |
| 1446 | const scheduler = new CountingScheduler("sync") |
| 1447 | return Stream.runDrain(stream).pipe( |
| 1448 | Effect.provideService(Scheduler.Scheduler, scheduler), |
| 1449 | Effect.map(() => scheduler.ops) |
| 1450 | ) |
| 1451 | } |
| 1452 | for (const nest of ["left", "right"] as const) { |
| 1453 | const small = yield* countOps(1_000, nest) |
| 1454 | const large = yield* countOps(2_000, nest) |
| 1455 | assertTrue(small > 1_000, `${nest}: operations were counted`) |
| 1456 | assertTrue(large / small < 2.5, `${nest}: doubling the chain multiplied the work by ${large / small}`) |
| 1457 | } |
| 1458 | })) |
| 1459 | |
| 1460 | it.effect("runs nested chains in order, closing each part before the next starts", () => |
| 1461 | Effect.gen(function*() { |
| 1462 | const log: Array<string> = [] |
| 1463 | const part = (name: string) => |
| 1464 | Stream.fromEffect(Effect.sync(() => { |
| 1465 | log.push(`start ${name}`) |
| 1466 | return name |
| 1467 | })).pipe(Stream.ensuring(Effect.sync(() => log.push(`end ${name}`)))) |
| 1468 | const stream = Stream.concat( |
| 1469 | Stream.concat(part("a"), Stream.concat(part("b"), part("c"))), |
| 1470 | Stream.concat(part("d"), part("e")) |
| 1471 | ) |
| 1472 | const expectedLog = ["a", "b", "c", "d", "e"].flatMap((name) => [`start ${name}`, `end ${name}`]) |
| 1473 | for (const run of ["first run", "second run"]) { |
| 1474 | log.length = 0 |
| 1475 | deepStrictEqual(yield* Stream.runCollect(stream), ["a", "b", "c", "d", "e"], run) |
| 1476 | deepStrictEqual(log, expectedLog, run) |
| 1477 | } |
| 1478 | })) |
| 1479 | |
| 1480 | it.effect("runs a copy of a chain with its own channel", () => |
| 1481 | Effect.gen(function*() { |
| 1482 | const chain = Stream.concat(Stream.make("a"), Stream.make("b")) |
| 1483 | const copy: Stream.Stream<string> = { ...chain, channel: Stream.make("copy").channel } |
| 1484 | deepStrictEqual(yield* Stream.runCollect(Stream.concat(copy, Stream.make("z"))), ["copy", "z"]) |
| 1485 | })) |
| 1486 | }) |
| 1487 | |
| 1488 | describe("flattening", () => { |
| 1489 | it.effect("flatten supports dropping parens in pipe", () => |
| 1490 | Effect.gen(function*() { |
| 1491 | const result = yield* pipe( |
| 1492 | Stream.make( |
| 1493 | Stream.make(1, 2), |
| 1494 | Stream.make(3, 4) |
| 1495 | ), |
| 1496 | Stream.flatten, |
| 1497 | Stream.runCollect |
| 1498 | ) |
| 1499 | assert.deepStrictEqual(result, [1, 2, 3, 4]) |
| 1500 | })) |
| 1501 | |
| 1502 | it.effect("flattenEffect supports dropping parens in pipe", () => |
| 1503 | Effect.gen(function*() { |
| 1504 | const result = yield* pipe( |
| 1505 | Stream.make( |
| 1506 | Effect.succeed(1), |
| 1507 | Effect.succeed(2), |
| 1508 | Effect.succeed(3) |
| 1509 | ), |
| 1510 | Stream.flattenEffect, |
| 1511 | Stream.runCollect |
| 1512 | ) |
| 1513 | assert.deepStrictEqual(result, [1, 2, 3]) |
| 1514 | })) |
| 1515 | }) |
| 1516 | |
| 1517 | const testOuterFailure = ( |
| 1518 | combinator: "flatMap" | "switchMap", |
| 1519 | inner: "never" | "slow" |
| 1520 | ) => |
| 1521 | Effect.gen(function*() { |
| 1522 | const started = yield* Latch.make(false) |
| 1523 | const failing = yield* Deferred.make<void>() |
| 1524 | const finalized = yield* Ref.make(0) |
| 1525 | const outer = Stream.concat( |
| 1526 | Stream.make(1), |
| 1527 | Stream.fromEffect( |
| 1528 | started.await.pipe( |
| 1529 | Effect.andThen(Deferred.succeed(failing, void 0)), |
| 1530 | Effect.andThen(Effect.fail("boom")) |
| 1531 | ) |
| 1532 | ) |
| 1533 | ) |
| 1534 | const makeInner = () => { |
| 1535 | started.openUnsafe() |
| 1536 | return (inner === "never" ? Stream.never : Stream.fromEffect(Effect.sleep(Duration.hours(1)))).pipe( |
| 1537 | Stream.ensuring(Ref.update(finalized, (n) => n + 1)) |
| 1538 | ) |
| 1539 | } |
| 1540 | const stream = combinator === "flatMap" |
| 1541 | ? Stream.flatMap(outer, makeInner, { concurrency: 2 }) |
| 1542 | : Stream.switchMap(outer, makeInner) |
| 1543 | const fiber = yield* stream.pipe( |
| 1544 | Stream.runDrain, |
| 1545 | Effect.forkChild |
| 1546 | ) |
| 1547 | yield* Deferred.await(failing) |
| 1548 | |
| 1549 | const result = yield* Fiber.await(fiber) |
| 1550 | assert.deepStrictEqual(result, Exit.fail("boom")) |
| 1551 | assert.strictEqual(yield* Ref.get(finalized), 1) |
| 1552 | }) |
| 1553 | |
| 1554 | describe("flatMap", () => { |
| 1555 | it.effect("releases each inner stream before starting the next", () => |
| 1556 | Effect.gen(function*() { |
| 1557 | const log: Array<string> = [] |
| 1558 | const resource = (n: number) => |
| 1559 | Stream.unwrap(Effect.map( |
| 1560 | Effect.acquireRelease( |
| 1561 | Effect.sync(() => log.push(`acquire ${n}`)), |
| 1562 | () => Effect.sync(() => log.push(`release ${n}`)) |
| 1563 | ), |
| 1564 | () => Stream.make(n) |
| 1565 | )) |
| 1566 | const result = yield* Stream.make(1, 2, 3).pipe( |
| 1567 | Stream.flatMap((n) => n % 2 === 0 ? Stream.make(n) : resource(n)), |
| 1568 | Stream.tap((n) => Effect.sync(() => log.push(`emit ${n}`))), |
| 1569 | Stream.runCollect |
| 1570 | ) |
| 1571 | assert.deepStrictEqual(result, [1, 2, 3]) |
| 1572 | assert.deepStrictEqual(log, [ |
| 1573 | "acquire 1", |
| 1574 | "emit 1", |
| 1575 | "release 1", |
| 1576 | "emit 2", |
| 1577 | "acquire 3", |
| 1578 | "emit 3", |
| 1579 | "release 3" |
| 1580 | ]) |
| 1581 | })) |
| 1582 | |
| 1583 | it.effect("an inner stream that closes its scope does not affect the next one", () => |
| 1584 | Effect.gen(function*() { |
| 1585 | const log: Array<string> = [] |
| 1586 | const closesScope = Stream.fromChannel( |
| 1587 | Channel.fromTransform((upstream, scope) => |
| 1588 | Effect.andThen( |
| 1589 | // flatMap supplies a Closeable scope to each inner channel. |
| 1590 | Scope.close(scope as Scope.Closeable, Exit.void), |
| 1591 | Channel.toTransform(Stream.toChannel(Stream.make(0)))(upstream, scope) |
| 1592 | ) |
| 1593 | ) |
| 1594 | ) |
| 1595 | const resource = Stream.unwrap(Effect.map( |
| 1596 | Effect.acquireRelease( |
| 1597 | Effect.sync(() => log.push("acquire")), |
| 1598 | () => Effect.sync(() => log.push("release")) |
| 1599 | ), |
| 1600 | () => Stream.make(1) |
| 1601 | )) |
| 1602 | const result = yield* Stream.make(0, 1).pipe( |
| 1603 | Stream.flatMap((n) => n === 0 ? closesScope : resource), |
| 1604 | Stream.tap((n) => Effect.sync(() => log.push(`emit ${n}`))), |
| 1605 | Stream.runCollect |
| 1606 | ) |
| 1607 | assert.deepStrictEqual(result, [0, 1]) |
| 1608 | assert.deepStrictEqual(log, ["emit 0", "acquire", "emit 1", "release"]) |
| 1609 | })) |
| 1610 | |
| 1611 | it.effect("interrupts all inner streams when the outer fails at the concurrency limit", () => |
| 1612 | Effect.gen(function*() { |
| 1613 | const latch = yield* Latch.make() |
| 1614 | const finalized = yield* Ref.make(0) |
| 1615 | const outer = Stream.concat( |
| 1616 | Stream.make(1, 2), |
| 1617 | Stream.flatMap(Stream.fromEffect(latch.await), () => Stream.fail("boom")) |
| 1618 | ) |
| 1619 | const result = yield* Stream.flatMap( |
| 1620 | outer, |
| 1621 | () => |
| 1622 | Stream.flatMap(Stream.fromEffect(latch.open), () => Stream.never).pipe( |
| 1623 | Stream.ensuring(Ref.update(finalized, (n) => n + 1)) |
| 1624 | ), |
| 1625 | { concurrency: 2 } |
| 1626 | ).pipe( |
| 1627 | Stream.runDrain, |
| 1628 | Effect.exit |
| 1629 | ) |
| 1630 | |
| 1631 | assert.deepStrictEqual(result, Exit.fail("boom")) |
| 1632 | assert.strictEqual(yield* Ref.get(finalized), 2) |
| 1633 | })) |
| 1634 | |
| 1635 | it.effect("releases a permit after a successful saturated pull", () => |
| 1636 | Effect.gen(function*() { |
| 1637 | const gate = yield* Deferred.make<void>() |
| 1638 | const outer = Stream.concat( |
| 1639 | Stream.make(1, 2), |
| 1640 | Stream.fromEffect(Deferred.succeed(gate, void 0).pipe(Effect.as(3))) |
| 1641 | ) |
| 1642 | const result = yield* Stream.flatMap( |
| 1643 | outer, |
| 1644 | (n) => n === 3 ? Stream.make(3) : Stream.fromEffect(Deferred.await(gate).pipe(Effect.as(n))), |
| 1645 | { concurrency: 2 } |
| 1646 | ).pipe(Stream.runCollect) |
| 1647 | |
| 1648 | assert.deepStrictEqual([...result].sort(), [1, 2, 3]) |
| 1649 | })) |
| 1650 | |
| 1651 | it.effect("preserves an outer element when a permit arrives during a pull", () => |
| 1652 | Effect.gen(function*() { |
| 1653 | const probing = yield* Deferred.make<void>() |
| 1654 | const gate = yield* Deferred.make<void>() |
| 1655 | const innerGate = yield* Deferred.make<void>() |
| 1656 | const innerCompleted = yield* Deferred.make<void>() |
| 1657 | const outer = Stream.concat( |
| 1658 | Stream.make(1, 2), |
| 1659 | Stream.fromEffect( |
| 1660 | Deferred.succeed(probing, void 0).pipe( |
| 1661 | Effect.andThen(Deferred.await(gate)), |
| 1662 | Effect.as(3) |
| 1663 | ) |
| 1664 | ) |
| 1665 | ) |
| 1666 | const fiber = yield* Stream.flatMap( |
| 1667 | outer, |
| 1668 | (n) => |
| 1669 | n === 3 |
| 1670 | ? Stream.make(3) |
| 1671 | : Stream.fromEffect(Deferred.await(innerGate).pipe(Effect.as(n))).pipe( |
| 1672 | Stream.ensuring(Deferred.succeed(innerCompleted, void 0)) |
| 1673 | ), |
| 1674 | { concurrency: 2 } |
| 1675 | ).pipe( |
| 1676 | Stream.runCollect, |
| 1677 | Effect.forkChild |
| 1678 | ) |
| 1679 | yield* Deferred.await(probing) |
| 1680 | yield* Deferred.succeed(innerGate, void 0) |
| 1681 | yield* Deferred.await(innerCompleted) |
| 1682 | yield* Deferred.succeed(gate, void 0) |
| 1683 | |
| 1684 | const result = yield* Fiber.join(fiber) |
| 1685 | assert.deepStrictEqual([...result].sort(), [1, 2, 3]) |
| 1686 | })) |
| 1687 | |
| 1688 | it.effect( |
| 1689 | "fails promptly and interrupts slow inner streams when the outer stream fails", |
| 1690 | () => testOuterFailure("flatMap", "slow") |
| 1691 | ) |
| 1692 | }) |
| 1693 | |
| 1694 | describe("mapEffect with concurrency", () => { |
| 1695 | for (const unordered of [false, true]) { |
| 1696 | it.effect(`fails when the mapping function throws (unordered: ${unordered})`, () => |
| 1697 | Effect.gen(function*() { |
| 1698 | const boom = new Error("boom") |
| 1699 | const fiber = yield* Stream.make(1, 2).pipe( |
| 1700 | Stream.mapEffect((n) => { |
| 1701 | if (n === 1) return Effect.never |
| 1702 | throw boom |
| 1703 | }, { concurrency: 2, unordered }), |
| 1704 | Stream.runDrain, |
| 1705 | Effect.timeoutOption("1 second"), |
| 1706 | Effect.exit, |
| 1707 | Effect.forkChild |
| 1708 | ) |
| 1709 | yield* TestClock.adjust("1 second") |
| 1710 | assertExitFailure(yield* Fiber.join(fiber), Cause.die(boom)) |
| 1711 | })) |
| 1712 | } |
| 1713 | }) |
| 1714 | |
| 1715 | describe("switchMap", () => { |
| 1716 | it.effect( |
| 1717 | "interrupts a never-ending inner stream when the outer stream fails", |
| 1718 | () => testOuterFailure("switchMap", "never") |
| 1719 | ) |
| 1720 | |
| 1721 | it.effect( |
| 1722 | "fails promptly and interrupts a slow inner stream when the outer stream fails", |
| 1723 | () => testOuterFailure("switchMap", "slow") |
| 1724 | ) |
| 1725 | }) |
| 1726 | |
| 1727 | it.effect.prop( |
| 1728 | "rechunk", |
| 1729 | { |
| 1730 | chunks: Schema.Array(Schema.Array(Schema.Int)).check(Schema.isMinLength(1)), |
| 1731 | size: Schema.Int.check(Schema.isBetween({ minimum: 1, maximum: 100 })) |
| 1732 | }, |
| 1733 | Effect.fnUntraced(function*({ chunks, size }) { |
| 1734 | const actual = yield* Stream.fromArray(chunks).pipe( |
| 1735 | Stream.filter((chunk): chunk is NonEmptyArray<number> => isReadonlyArrayNonEmpty(chunk)), |
| 1736 | Stream.flattenArray, |
| 1737 | Stream.rechunk(size), |
| 1738 | Stream.chunks, |
| 1739 | Stream.runCollect |
| 1740 | ) |
| 1741 | const expected = chunks.flat() |
| 1742 | assert.deepStrictEqual(actual, grouped(expected, size)) |
| 1743 | }) |
| 1744 | ) |
| 1745 | |
| 1746 | it.effect.each([ |
| 1747 | { size: 200001, lengths: [200000] }, |
| 1748 | { size: 200000, lengths: [200000] }, |
| 1749 | { size: 199999, lengths: [199999, 1] } |
| 1750 | ])("rechunk preserves a large source chunk with target $size", ({ lengths, size }) => |
| 1751 | Effect.gen(function*() { |
| 1752 | const values = Array.makeBy(200000, (i) => i) |
| 1753 | const actual = yield* Stream.fromArray(values).pipe( |
| 1754 | Stream.rechunk(size), |
| 1755 | Stream.chunks, |
| 1756 | Stream.runCollect |
| 1757 | ) |
| 1758 | assert.deepStrictEqual(actual.map((chunk) => chunk.length), lengths) |
| 1759 | assert.deepStrictEqual(actual.flat(), values) |
| 1760 | })) |
| 1761 | |
| 1762 | it.effect("rechunk preserves large input split across source chunks", () => |
| 1763 | Effect.gen(function*() { |
| 1764 | const values = Array.makeBy(200001, (i) => i) |
| 1765 | const actual = yield* Stream.fromArrays(values.slice(0, 1), values.slice(1)).pipe( |
| 1766 | Stream.rechunk(200002), |
| 1767 | Stream.chunks, |
| 1768 | Stream.runCollect |
| 1769 | ) |
| 1770 | assert.deepStrictEqual(actual.map((chunk) => chunk.length), [200001]) |
| 1771 | assert.deepStrictEqual(actual.flat(), values) |
| 1772 | })) |
| 1773 | |
| 1774 | it.effect("rechunk and grouped normalize their chunk size", () => |
| 1775 | Effect.gen(function*() { |
| 1776 | const counts = [Number.NaN, 0.5, 1.9, 2.9] |
| 1777 | const rechunked = yield* Effect.forEach(counts, (n) => |
| 1778 | Stream.make(1, 2, 3).pipe( |
| 1779 | Stream.rechunk(n), |
| 1780 | Stream.chunks, |
| 1781 | Stream.runCollect |
| 1782 | )) |
| 1783 | const groupedResults = yield* Effect.forEach(counts, (n) => |
| 1784 | Stream.make(1, 2, 3).pipe( |
| 1785 | Stream.grouped(n), |
| 1786 | Stream.runCollect |
| 1787 | )) |
| 1788 | const expected: typeof rechunked = [ |
| 1789 | [[1], [2], [3]], |
| 1790 | [[1], [2], [3]], |
| 1791 | [[1], [2], [3]], |
| 1792 | [[1, 2], [3]] |
| 1793 | ] |
| 1794 | assert.deepStrictEqual(rechunked, expected) |
| 1795 | assert.deepStrictEqual(groupedResults, expected) |
| 1796 | })) |
| 1797 | |
| 1798 | describe("transduce", () => { |
| 1799 | it.effect("no remainder", () => |
| 1800 | Effect.gen(function*() { |
| 1801 | const result = yield* Stream.make(1, 2, 3, 4).pipe( |
| 1802 | Stream.transduce(Sink.reduceWhile(() => 100, (n) => n % 2 === 0, (acc, n) => acc + n)), |
| 1803 | Stream.runCollect |
| 1804 | ) |
| 1805 | assert.deepStrictEqual(result, [101, 105, 104]) |
| 1806 | })) |
| 1807 | |
| 1808 | it.effect("with a sink that always signals more", () => |
| 1809 | Effect.gen(function*() { |
| 1810 | const result = yield* Stream.make(1, 2, 3).pipe( |
| 1811 | Stream.transduce(Sink.reduceWhile(() => 0, constTrue, (acc, n) => acc + n)), |
| 1812 | Stream.runCollect |
| 1813 | ) |
| 1814 | assert.deepStrictEqual(result, [6]) |
| 1815 | })) |
| 1816 | |
| 1817 | it.effect("propagates scope error", () => |
| 1818 | Effect.gen(function*() { |
| 1819 | const result = yield* Stream.make(1, 2, 3).pipe( |
| 1820 | Stream.transduce(Sink.fail("Woops")), |
| 1821 | Stream.runCollect, |
| 1822 | Effect.result |
| 1823 | ) |
| 1824 | assertFailure(result, "Woops") |
| 1825 | })) |
| 1826 | }) |
| 1827 | |
| 1828 | describe("buffer", () => { |
| 1829 | it.effect("maintains elements and ordering", () => |
| 1830 | Effect.gen(function*() { |
| 1831 | const chunks = Array.make( |
| 1832 | Array.range(0, 3), |
| 1833 | Array.range(2, 5), |
| 1834 | Array.range(3, 7) |
| 1835 | ) |
| 1836 | const result = yield* Stream.fromArrays(...chunks).pipe( |
| 1837 | Stream.buffer({ capacity: 2 }), |
| 1838 | Stream.runCollect |
| 1839 | ) |
| 1840 | assert.deepStrictEqual(result, chunks.flat()) |
| 1841 | })) |
| 1842 | |
| 1843 | it.effect("stream with a failure", () => |
| 1844 | Effect.gen(function*() { |
| 1845 | const result = yield* Stream.range(0, 9).pipe( |
| 1846 | Stream.concat(Stream.fail("boom")), |
| 1847 | Stream.buffer({ capacity: 2 }), |
| 1848 | Stream.runCollect, |
| 1849 | Effect.exit |
| 1850 | ) |
| 1851 | assertExitFailure(result, Cause.fail("boom")) |
| 1852 | })) |
| 1853 | |
| 1854 | it.effect("fast producer progresses independently", () => |
| 1855 | Effect.gen(function*() { |
| 1856 | const arr = Array.empty<number>() |
| 1857 | const latch = yield* Deferred.make<void>() |
| 1858 | const stream = Stream.range(1, 4).pipe( |
| 1859 | Stream.tap(Effect.fnUntraced(function*(n) { |
| 1860 | arr.push(n) |
| 1861 | if (n === 4) { |
| 1862 | yield* Deferred.succeed(latch, void 0) |
| 1863 | } |
| 1864 | })), |
| 1865 | Stream.buffer({ capacity: 2 }) |
| 1866 | ) |
| 1867 | const result1 = yield* stream.pipe(Stream.take(2), Stream.runCollect) |
| 1868 | yield* Deferred.await(latch) |
| 1869 | assert.deepStrictEqual(result1, [1, 2]) |
| 1870 | assert.deepStrictEqual(arr, [1, 2, 3, 4]) |
| 1871 | })) |
| 1872 | }) |
| 1873 | |
| 1874 | describe("bufferArray - suspend", () => { |
| 1875 | it.effect("maintains elements and ordering", () => |
| 1876 | Effect.gen(function*() { |
| 1877 | const chunks = Array.make( |
| 1878 | Array.range(0, 3), |
| 1879 | Array.range(2, 5), |
| 1880 | Array.range(3, 7) |
| 1881 | ) |
| 1882 | const result = yield* Stream.fromArrays(...chunks).pipe( |
| 1883 | Stream.bufferArray({ capacity: 2 }), |
| 1884 | Stream.runCollect |
| 1885 | ) |
| 1886 | assert.deepStrictEqual(result, chunks.flat()) |
| 1887 | })) |
| 1888 | |
| 1889 | it.effect("stream with a failure", () => |
| 1890 | Effect.gen(function*() { |
| 1891 | const error = "boom" |
| 1892 | const result = yield* Stream.range(0, 9).pipe( |
| 1893 | Stream.concat(Stream.fail(error)), |
| 1894 | Stream.bufferArray({ capacity: 2 }), |
| 1895 | Stream.runCollect, |
| 1896 | Effect.exit |
| 1897 | ) |
| 1898 | assertExitFailure(result, Cause.fail(error)) |
| 1899 | })) |
| 1900 | |
| 1901 | it.effect("fast producer progresses independently", () => |
| 1902 | Effect.gen(function*() { |
| 1903 | const arr = Array.empty<number>() |
| 1904 | const latch = yield* Deferred.make<void>() |
| 1905 | const stream = Stream.range(1, 4).pipe( |
| 1906 | Stream.tap(Effect.fnUntraced(function*(n) { |
| 1907 | arr.push(n) |
| 1908 | if (n === 4) { |
| 1909 | yield* Deferred.succeed(latch, void 0) |
| 1910 | } |
| 1911 | })), |
| 1912 | Stream.bufferArray({ capacity: 2 }) |
| 1913 | ) |
| 1914 | const result1 = yield* stream.pipe(Stream.take(2), Stream.runCollect) |
| 1915 | yield* Deferred.await(latch) |
| 1916 | assert.deepStrictEqual(result1, [1, 2]) |
| 1917 | assert.deepStrictEqual(arr, [1, 2, 3, 4]) |
| 1918 | })) |
| 1919 | }) |
| 1920 | |
| 1921 | describe("bufferArray - dropping", () => { |
| 1922 | it.effect("buffers a stream with a failure", () => |
| 1923 | Effect.gen(function*() { |
| 1924 | const error = "boom" |
| 1925 | const result = yield* Stream.range(1, 1_000).pipe( |
| 1926 | Stream.concat(Stream.fail(error)), |
| 1927 | Stream.concat(Stream.range(1_001, 2_000)), |
| 1928 | Stream.bufferArray({ capacity: 2, strategy: "dropping" }), |
| 1929 | Stream.runCollect, |
| 1930 | Effect.exit |
| 1931 | ) |
| 1932 | assert.deepStrictEqual(result, Exit.fail(error)) |
| 1933 | })) |
| 1934 | |
| 1935 | it.effect("fast producer progress independently", () => |
| 1936 | Effect.gen(function*() { |
| 1937 | const arr = Array.empty<number>() |
| 1938 | const latch1 = yield* Deferred.make<void>() |
| 1939 | const latch2 = yield* Deferred.make<void>() |
| 1940 | const latch3 = yield* Deferred.make<void>() |
| 1941 | const latch4 = yield* Deferred.make<void>() |
| 1942 | const stream1 = Stream.make(0).pipe( |
| 1943 | Stream.concat( |
| 1944 | Stream.fromEffect(Deferred.await(latch1)).pipe( |
| 1945 | Stream.flatMap(() => |
| 1946 | Stream.range(1, 16).pipe( |
| 1947 | Stream.rechunk(1), |
| 1948 | Stream.ensuring(Deferred.succeed(latch2, void 0)) |
| 1949 | ) |
| 1950 | ) |
| 1951 | ) |
| 1952 | ) |
| 1953 | ) |
| 1954 | const stream2 = Stream.fromEffect(Deferred.await(latch3)).pipe( |
| 1955 | Stream.flatMap(() => |
| 1956 | Stream.range(17, 24).pipe( |
| 1957 | Stream.rechunk(1), |
| 1958 | Stream.ensuring(Deferred.succeed(latch4, void 0)) |
| 1959 | ) |
| 1960 | ) |
| 1961 | ) |
| 1962 | const stream3 = Stream.make(-1) |
| 1963 | const stream = stream1.pipe( |
| 1964 | Stream.concat(stream2), |
| 1965 | Stream.concat(stream3), |
| 1966 | Stream.bufferArray({ capacity: 8, strategy: "dropping" }) |
| 1967 | ) |
| 1968 | const { result1, result2, result3 } = yield* Stream.toPull(stream).pipe( |
| 1969 | Effect.flatMap((pull) => |
| 1970 | Effect.gen(function*() { |
| 1971 | const result1 = yield* pull |
| 1972 | yield* Deferred.succeed(latch1, void 0) |
| 1973 | yield* Deferred.await(latch2) |
| 1974 | yield* pull.pipe( |
| 1975 | Effect.tap((chunk) => |
| 1976 | Effect.sync(() => { |
| 1977 | arr.push(...chunk) |
| 1978 | }) |
| 1979 | ), |
| 1980 | Effect.repeat({ times: 7 }) |
| 1981 | ) |
| 1982 | const result2 = arr.slice() |
| 1983 | yield* Deferred.succeed(latch3, void 0) |
| 1984 | yield* Deferred.await(latch4) |
| 1985 | yield* pull.pipe( |
| 1986 | Effect.tap((chunk) => |
| 1987 | Effect.sync(() => { |
| 1988 | arr.push(...chunk) |
| 1989 | }) |
| 1990 | ), |
| 1991 | Effect.repeat({ times: 7 }) |
| 1992 | ) |
| 1993 | const result3 = arr.slice() |
| 1994 | return { result1, result2, result3 } |
| 1995 | }) |
| 1996 | ), |
| 1997 | Effect.scoped |
| 1998 | ) |
| 1999 | const expected1 = Array.of(0) |
| 2000 | const expected2 = [1, 2, 3, 4, 5, 6, 7, 8] |
| 2001 | const expected3 = [1, 2, 3, 4, 5, 6, 7, 8, 17, 18, 19, 20, 21, 22, 23, 24] |
| 2002 | assert.deepStrictEqual(result1, expected1) |
| 2003 | assert.deepStrictEqual(result2, expected2) |
| 2004 | assert.deepStrictEqual(result3, expected3) |
| 2005 | })) |
| 2006 | |
| 2007 | it.effect("buffers a stream with a failure", () => |
| 2008 | Effect.gen(function*() { |
| 2009 | const error = "boom" |
| 2010 | const result = yield* pipe( |
| 2011 | Stream.range(1, 1_000), |
| 2012 | Stream.concat(Stream.fail(error)), |
| 2013 | Stream.concat(Stream.range(1_000, 2_000)), |
| 2014 | Stream.buffer({ capacity: 2, strategy: "dropping" }), |
| 2015 | Stream.runCollect, |
| 2016 | Effect.exit |
| 2017 | ) |
| 2018 | assert.deepStrictEqual(result, Exit.fail(error)) |
| 2019 | })) |
| 2020 | |
| 2021 | it.effect("fast producer progress independently", () => |
| 2022 | Effect.gen(function*() { |
| 2023 | const ref = yield* Ref.make(Array.empty<number>()) |
| 2024 | const latch1 = yield* Deferred.make<void>() |
| 2025 | const latch2 = yield* Deferred.make<void>() |
| 2026 | const latch3 = yield* Deferred.make<void>() |
| 2027 | const latch4 = yield* Deferred.make<void>() |
| 2028 | const stream1 = pipe( |
| 2029 | Stream.make(0), |
| 2030 | Stream.concat( |
| 2031 | pipe( |
| 2032 | Stream.fromEffect(Deferred.await(latch1)), |
| 2033 | Stream.flatMap(() => |
| 2034 | pipe( |
| 2035 | Stream.range(1, 17), |
| 2036 | Stream.rechunk(1), |
| 2037 | Stream.ensuring(Deferred.succeed(latch2, void 0)) |
| 2038 | ) |
| 2039 | ) |
| 2040 | ) |
| 2041 | ) |
| 2042 | ) |
| 2043 | const stream2 = pipe( |
| 2044 | Stream.fromEffect(Deferred.await(latch3)), |
| 2045 | Stream.flatMap(() => |
| 2046 | pipe( |
| 2047 | Stream.range(17, 24), |
| 2048 | Stream.rechunk(1), |
| 2049 | Stream.ensuring(Deferred.succeed(latch4, void 0)) |
| 2050 | ) |
| 2051 | ) |
| 2052 | ) |
| 2053 | const stream3 = Stream.make(-1) |
| 2054 | const stream = pipe( |
| 2055 | stream1, |
| 2056 | Stream.concat(stream2), |
| 2057 | Stream.concat(stream3), |
| 2058 | Stream.buffer({ capacity: 8, strategy: "dropping" }) |
| 2059 | ) |
| 2060 | const { result1, result2, result3 } = yield* pipe( |
| 2061 | Stream.toPull(stream), |
| 2062 | Effect.flatMap((pull) => |
| 2063 | Effect.gen(function*() { |
| 2064 | const result1 = yield* pull |
| 2065 | yield* Deferred.succeed(latch1, void 0) |
| 2066 | yield* Deferred.await(latch2) |
| 2067 | yield* pipe( |
| 2068 | pull, |
| 2069 | Effect.flatMap((chunk) => Ref.update(ref, Array.appendAll(chunk))) |
| 2070 | ) |
| 2071 | const result2 = yield* Ref.get(ref) |
| 2072 | yield* Deferred.succeed(latch3, void 0) |
| 2073 | yield* Deferred.await(latch4) |
| 2074 | yield* pipe( |
| 2075 | pull, |
| 2076 | Effect.flatMap((chunk) => Ref.update(ref, Array.appendAll(chunk))) |
| 2077 | ) |
| 2078 | const result3 = yield* (Ref.get(ref)) |
| 2079 | return { result1, result2, result3 } |
| 2080 | }) |
| 2081 | ), |
| 2082 | Effect.scoped |
| 2083 | ) |
| 2084 | const expected1 = [0] as const |
| 2085 | const expected2 = [1, 2, 3, 4, 5, 6, 7, 8] |
| 2086 | const expected3 = [1, 2, 3, 4, 5, 6, 7, 8, 17, 18, 19, 20, 21, 22, 23, 24] |
| 2087 | deepStrictEqual(result1, expected1) |
| 2088 | deepStrictEqual(result2, expected2) |
| 2089 | deepStrictEqual(result3, expected3) |
| 2090 | })) |
| 2091 | }) |
| 2092 | |
| 2093 | describe("bufferArray - sliding", () => { |
| 2094 | it.effect("buffers a stream with a failure", () => |
| 2095 | Effect.gen(function*() { |
| 2096 | const error = "boom" |
| 2097 | const result = yield* Stream.range(1, 1_000).pipe( |
| 2098 | Stream.concat(Stream.fail(error)), |
| 2099 | Stream.concat(Stream.range(1_001, 2_000)), |
| 2100 | Stream.bufferArray({ capacity: 2, strategy: "sliding" }), |
| 2101 | Stream.runCollect, |
| 2102 | Effect.exit |
| 2103 | ) |
| 2104 | assertExitFailure(result, Cause.fail(error)) |
| 2105 | })) |
| 2106 | |
| 2107 | it.effect("fast producer progress independently", () => |
| 2108 | Effect.gen(function*() { |
| 2109 | const ref = yield* Ref.make(Array.empty<number>()) |
| 2110 | |
| 2111 | const latch1 = yield* Deferred.make<void>() |
| 2112 | const latch2 = yield* Deferred.make<void>() |
| 2113 | const latch3 = yield* Deferred.make<void>() |
| 2114 | const latch4 = yield* Deferred.make<void>() |
| 2115 | const latch5 = yield* Deferred.make<void>() |
| 2116 | const stream1 = Stream.make(0).pipe( |
| 2117 | Stream.concat( |
| 2118 | pipe( |
| 2119 | Stream.fromEffect(Deferred.await(latch1)), |
| 2120 | Stream.flatMap(() => |
| 2121 | pipe( |
| 2122 | Stream.range(1, 16), |
| 2123 | Stream.rechunk(1), |
| 2124 | Stream.ensuring(Deferred.succeed(latch2, void 0)) |
| 2125 | ) |
| 2126 | ) |
| 2127 | ) |
| 2128 | ) |
| 2129 | ) |
| 2130 | const stream2 = pipe( |
| 2131 | Stream.fromEffect(Deferred.await(latch3)), |
| 2132 | Stream.flatMap(() => |
| 2133 | pipe( |
| 2134 | Stream.range(17, 25), |
| 2135 | Stream.rechunk(1), |
| 2136 | Stream.ensuring(Deferred.succeed(latch4, void 0)) |
| 2137 | ) |
| 2138 | ) |
| 2139 | ) |
| 2140 | const stream3 = pipe( |
| 2141 | Stream.fromEffect(Deferred.await(latch5)), |
| 2142 | Stream.flatMap(() => Stream.make(-1)) |
| 2143 | ) |
| 2144 | const stream = pipe( |
| 2145 | stream1, |
| 2146 | Stream.concat(stream2), |
| 2147 | Stream.concat(stream3), |
| 2148 | Stream.bufferArray({ capacity: 8, strategy: "sliding" }) |
| 2149 | ) |
| 2150 | const { result1, result2, result3 } = yield* pipe( |
| 2151 | Stream.toPull(stream), |
| 2152 | Effect.flatMap((pull) => |
| 2153 | Effect.gen(function*() { |
| 2154 | const result1 = yield* pull |
| 2155 | yield* Deferred.succeed(latch1, void 0) |
| 2156 | yield* Deferred.await(latch2) |
| 2157 | yield* pipe( |
| 2158 | pull, |
| 2159 | Effect.flatMap((chunk) => Ref.update(ref, Array.appendAll(chunk))), |
| 2160 | Effect.repeat({ times: 7 }) |
| 2161 | ) |
| 2162 | const result2 = yield* Ref.get(ref) |
| 2163 | yield* Deferred.succeed(latch3, void 0) |
| 2164 | yield* Deferred.await(latch4) |
| 2165 | yield* pipe( |
| 2166 | pull, |
| 2167 | Effect.flatMap((chunk) => Ref.update(ref, Array.appendAll(chunk))), |
| 2168 | Effect.repeat({ times: 7 }) |
| 2169 | ) |
| 2170 | const result3 = yield* (Ref.get(ref)) |
| 2171 | return { result1, result2, result3 } |
| 2172 | }) |
| 2173 | ), |
| 2174 | Effect.scoped |
| 2175 | ) |
| 2176 | const expected1 = [0] |
| 2177 | const expected2 = [9, 10, 11, 12, 13, 14, 15, 16] |
| 2178 | const expected3 = [9, 10, 11, 12, 13, 14, 15, 16, 18, 19, 20, 21, 22, 23, 24, 25] |
| 2179 | assert.deepStrictEqual(Array.fromIterable(result1), expected1) |
| 2180 | assert.deepStrictEqual(Array.fromIterable(result2), expected2) |
| 2181 | assert.deepStrictEqual(Array.fromIterable(result3), expected3) |
| 2182 | })) |
| 2183 | |
| 2184 | it.effect("buffers a stream with a failure", () => |
| 2185 | Effect.gen(function*() { |
| 2186 | const error = "boom" |
| 2187 | const result = yield* pipe( |
| 2188 | Stream.range(1, 1_000), |
| 2189 | Stream.concat(Stream.fail(error)), |
| 2190 | Stream.concat(Stream.range(1_001, 2_000)), |
| 2191 | Stream.buffer({ capacity: 2, strategy: "sliding" }), |
| 2192 | Stream.runCollect, |
| 2193 | Effect.exit |
| 2194 | ) |
| 2195 | deepStrictEqual(result, Exit.fail(error)) |
| 2196 | })) |
| 2197 | |
| 2198 | it.effect("fast producer progress independently", () => |
| 2199 | Effect.gen(function*() { |
| 2200 | const ref = yield* Ref.make(Array.empty<number>()) |
| 2201 | const latch1 = yield* Deferred.make<void>() |
| 2202 | const latch2 = yield* Deferred.make<void>() |
| 2203 | const latch3 = yield* Deferred.make<void>() |
| 2204 | const latch4 = yield* Deferred.make<void>() |
| 2205 | const stream1 = pipe( |
| 2206 | Stream.make(0), |
| 2207 | Stream.concat( |
| 2208 | pipe( |
| 2209 | Stream.fromEffect(Deferred.await(latch1)), |
| 2210 | Stream.flatMap(() => |
| 2211 | pipe( |
| 2212 | Stream.range(1, 16), |
| 2213 | Stream.rechunk(1), |
| 2214 | Stream.ensuring(Deferred.succeed(latch2, void 0)) |
| 2215 | ) |
| 2216 | ) |
| 2217 | ) |
| 2218 | ) |
| 2219 | ) |
| 2220 | const stream2 = pipe( |
| 2221 | Stream.fromEffect(Deferred.await(latch3)), |
| 2222 | Stream.flatMap(() => |
| 2223 | pipe( |
| 2224 | Stream.range(17, 24), |
| 2225 | Stream.rechunk(1), |
| 2226 | Stream.ensuring(Deferred.succeed(latch4, void 0)) |
| 2227 | ) |
| 2228 | ) |
| 2229 | ) |
| 2230 | const stream3 = Stream.make(-1) |
| 2231 | const stream = pipe( |
| 2232 | stream1, |
| 2233 | Stream.concat(stream2), |
| 2234 | Stream.concat(stream3), |
| 2235 | Stream.buffer({ capacity: 8, strategy: "sliding" }) |
| 2236 | ) |
| 2237 | const { result1, result2, result3 } = yield* pipe( |
| 2238 | Stream.toPull(stream), |
| 2239 | Effect.flatMap((pull) => |
| 2240 | Effect.gen(function*() { |
| 2241 | const result1 = yield* pull |
| 2242 | yield* Deferred.succeed(latch1, void 0) |
| 2243 | yield* Deferred.await(latch2) |
| 2244 | yield* pipe( |
| 2245 | pull, |
| 2246 | Effect.flatMap((chunk) => Ref.update(ref, Array.appendAll(chunk))) |
| 2247 | ) |
| 2248 | const result2 = yield* (Ref.get(ref)) |
| 2249 | yield* (Deferred.succeed(latch3, void 0)) |
| 2250 | yield* (Deferred.await(latch4)) |
| 2251 | yield* pipe( |
| 2252 | pull, |
| 2253 | Effect.flatMap((chunk) => Ref.update(ref, Array.appendAll(chunk))), |
| 2254 | Effect.repeat({ times: 7 }) |
| 2255 | ) |
| 2256 | const result3 = yield* (Ref.get(ref)) |
| 2257 | return { result1, result2, result3 } |
| 2258 | }) |
| 2259 | ), |
| 2260 | Effect.scoped |
| 2261 | ) |
| 2262 | const expected1 = [0] as const |
| 2263 | const expected2 = [9, 10, 11, 12, 13, 14, 15, 16] |
| 2264 | const expected3 = [9, 10, 11, 12, 13, 14, 15, 16, 18, 19, 20, 21, 22, 23, 24, -1] |
| 2265 | deepStrictEqual(result1, expected1) |
| 2266 | deepStrictEqual(result2, expected2) |
| 2267 | deepStrictEqual(result3, expected3) |
| 2268 | })) |
| 2269 | |
| 2270 | it.effect("propagates defects", () => |
| 2271 | Effect.gen(function*() { |
| 2272 | const result = yield* pipe( |
| 2273 | Stream.fromEffect(Effect.die("boom")), |
| 2274 | Stream.buffer({ capacity: 1, strategy: "sliding" }), |
| 2275 | Stream.runDrain, |
| 2276 | Effect.exit |
| 2277 | ) |
| 2278 | deepStrictEqual(result, Exit.die("boom")) |
| 2279 | })) |
| 2280 | }) |
| 2281 | |
| 2282 | describe("buffer - unbounded", () => { |
| 2283 | it.effect("buffer - buffers the stream", () => |
| 2284 | Effect.gen(function*() { |
| 2285 | const chunk = Array.range(0, 10) |
| 2286 | const result = yield* pipe( |
| 2287 | Stream.fromIterable(chunk), |
| 2288 | Stream.buffer({ capacity: "unbounded" }), |
| 2289 | Stream.runCollect |
| 2290 | ) |
| 2291 | deepStrictEqual(result, chunk) |
| 2292 | })) |
| 2293 | |
| 2294 | it.effect("buffers a stream with a failure", () => |
| 2295 | Effect.gen(function*() { |
| 2296 | const error = "boom" |
| 2297 | const result = yield* pipe( |
| 2298 | Stream.range(0, 9), |
| 2299 | Stream.concat(Stream.fail(error)), |
| 2300 | Stream.buffer({ capacity: "unbounded" }), |
| 2301 | Stream.runCollect, |
| 2302 | Effect.exit |
| 2303 | ) |
| 2304 | deepStrictEqual(result, Exit.fail(error)) |
| 2305 | })) |
| 2306 | |
| 2307 | it.effect("fast producer progress independently", () => |
| 2308 | Effect.gen(function*() { |
| 2309 | const ref = yield* Ref.make(Array.empty<number>()) |
| 2310 | const latch = yield* Deferred.make<void>() |
| 2311 | const stream = pipe( |
| 2312 | Stream.range(1, 999), |
| 2313 | Stream.tap((n) => |
| 2314 | pipe( |
| 2315 | Ref.update(ref, Array.append(n)), |
| 2316 | Effect.andThen(pipe(Deferred.succeed(latch, void 0), Effect.when(Effect.sync(() => n === 999)))) |
| 2317 | ) |
| 2318 | ), |
| 2319 | Stream.rechunk(999), |
| 2320 | Stream.buffer({ capacity: "unbounded" }) |
| 2321 | ) |
| 2322 | const result1 = yield* pipe(stream, Stream.take(2), Stream.runCollect) |
| 2323 | yield* Deferred.await(latch) |
| 2324 | const result2 = yield* Ref.get(ref) |
| 2325 | deepStrictEqual(result1, [1, 2]) |
| 2326 | deepStrictEqual(result2, Array.range(1, 999)) |
| 2327 | })) |
| 2328 | }) |
| 2329 | |
| 2330 | describe("share", () => { |
| 2331 | it.effect("sequenced", () => |
| 2332 | Effect.gen(function*() { |
| 2333 | const sharedStream = yield* Stream.fromSchedule(Schedule.spaced("1 seconds")).pipe( |
| 2334 | Stream.share({ capacity: 16 }) |
| 2335 | ) |
| 2336 | |
| 2337 | const firstFiber = yield* sharedStream.pipe( |
| 2338 | Stream.take(1), |
| 2339 | Stream.run(Sink.collect()), |
| 2340 | Effect.forkChild({ startImmediately: true }) |
| 2341 | ) |
| 2342 | |
| 2343 | yield* TestClock.adjust("1 seconds") |
| 2344 | |
| 2345 | const first = yield* Fiber.join(firstFiber) |
| 2346 | deepStrictEqual(first, [0]) |
| 2347 | |
| 2348 | const secondFiber = yield* sharedStream.pipe( |
| 2349 | Stream.take(1), |
| 2350 | Stream.run(Sink.collect()), |
| 2351 | Effect.forkChild({ startImmediately: true }) |
| 2352 | ) |
| 2353 | |
| 2354 | yield* TestClock.adjust("1 seconds") |
| 2355 | |
| 2356 | const second = yield* Fiber.join(secondFiber) |
| 2357 | deepStrictEqual(second, [0]) |
| 2358 | })) |
| 2359 | |
| 2360 | it.effect("sequenced with idleTimeToLive", () => |
| 2361 | Effect.gen(function*() { |
| 2362 | const sharedStream = yield* Stream.fromSchedule(Schedule.spaced("1 seconds")).pipe( |
| 2363 | Stream.share({ |
| 2364 | capacity: 16, |
| 2365 | idleTimeToLive: "1 second" |
| 2366 | }) |
| 2367 | ) |
| 2368 | |
| 2369 | const firstFiber = yield* sharedStream.pipe( |
| 2370 | Stream.take(1), |
| 2371 | Stream.run(Sink.collect()), |
| 2372 | Effect.forkChild({ startImmediately: true }) |
| 2373 | ) |
| 2374 | |
| 2375 | yield* TestClock.adjust("1 seconds") |
| 2376 | |
| 2377 | const first = yield* Fiber.join(firstFiber) |
| 2378 | deepStrictEqual(first, [0]) |
| 2379 | |
| 2380 | const secondFiber = yield* sharedStream.pipe( |
| 2381 | Stream.take(1), |
| 2382 | Stream.run(Sink.collect()), |
| 2383 | Effect.forkChild({ startImmediately: true }) |
| 2384 | ) |
| 2385 | |
| 2386 | yield* TestClock.adjust("1 seconds") |
| 2387 | |
| 2388 | const second = yield* Fiber.join(secondFiber) |
| 2389 | deepStrictEqual(second, [1]) |
| 2390 | })) |
| 2391 | |
| 2392 | it.effect("ends a consumer that starts after the shared upstream has ended", () => |
| 2393 | Effect.gen(function*() { |
| 2394 | const sharedStream = yield* Stream.share(Stream.make(1, 2, 3), { |
| 2395 | capacity: 16, |
| 2396 | idleTimeToLive: "1 minute" |
| 2397 | }) |
| 2398 | yield* Stream.runDrain(sharedStream) |
| 2399 | |
| 2400 | deepStrictEqual(yield* Stream.runCollect(sharedStream), []) |
| 2401 | })) |
| 2402 | |
| 2403 | it.effect("parallel", () => |
| 2404 | Effect.gen(function*() { |
| 2405 | const sharedStream = yield* Stream.fromSchedule(Schedule.spaced("1 seconds")).pipe( |
| 2406 | Stream.share({ capacity: 16 }) |
| 2407 | ) |
| 2408 | |
| 2409 | const fiber1 = yield* sharedStream.pipe( |
| 2410 | Stream.take(1), |
| 2411 | Stream.run(Sink.collect()), |
| 2412 | Effect.forkChild({ startImmediately: true }) |
| 2413 | ) |
| 2414 | const fiber2 = yield* sharedStream.pipe( |
| 2415 | Stream.take(2), |
| 2416 | Stream.run(Sink.collect()), |
| 2417 | Effect.forkChild({ startImmediately: true }) |
| 2418 | ) |
| 2419 | |
| 2420 | yield* TestClock.adjust("2 seconds") |
| 2421 | |
| 2422 | const [result1, result2] = yield* Fiber.joinAll([fiber1, fiber2]) |
| 2423 | |
| 2424 | deepStrictEqual(result1, [0]) |
| 2425 | deepStrictEqual(result2, [0, 1]) |
| 2426 | })) |
| 2427 | }) |
| 2428 | |
| 2429 | describe("raceAll", () => { |
| 2430 | it.effect("sync", () => |
| 2431 | Effect.gen(function*() { |
| 2432 | const result = yield* pipe( |
| 2433 | Stream.raceAll( |
| 2434 | Stream.make(0, 1, 2, 3), |
| 2435 | Stream.make(4, 5, 6, 7), |
| 2436 | Stream.make(7, 8, 9, 10) |
| 2437 | ), |
| 2438 | Stream.runCollect |
| 2439 | ) |
| 2440 | deepStrictEqual(result, [0, 1, 2, 3]) |
| 2441 | })) |
| 2442 | |
| 2443 | it.effect("async", () => |
| 2444 | Effect.gen(function*() { |
| 2445 | const fiber = yield* pipe( |
| 2446 | Stream.raceAll( |
| 2447 | Stream.fromSchedule(Schedule.spaced("1 second")), |
| 2448 | Stream.fromSchedule(Schedule.spaced("2 second")) |
| 2449 | ), |
| 2450 | Stream.take(5), |
| 2451 | Stream.runCollect, |
| 2452 | Effect.forkScoped |
| 2453 | ) |
| 2454 | yield* TestClock.adjust("5 second") |
| 2455 | const result = yield* Fiber.join(fiber) |
| 2456 | deepStrictEqual(result, [0, 1, 2, 3, 4]) |
| 2457 | })) |
| 2458 | |
| 2459 | it.effect("combined async + sync", () => |
| 2460 | Effect.gen(function*() { |
| 2461 | const result = yield* pipe( |
| 2462 | Stream.raceAll( |
| 2463 | Stream.fromSchedule(Schedule.spaced("1 second")), |
| 2464 | Stream.make(0, 1, 2, 3) |
| 2465 | ), |
| 2466 | Stream.runCollect |
| 2467 | ) |
| 2468 | deepStrictEqual(result, [0, 1, 2, 3]) |
| 2469 | })) |
| 2470 | |
| 2471 | it.effect("combined sync + async", () => |
| 2472 | Effect.gen(function*() { |
| 2473 | const result = yield* pipe( |
| 2474 | Stream.raceAll( |
| 2475 | Stream.make(0, 1, 2, 3), |
| 2476 | Stream.fromSchedule(Schedule.spaced("1 second")) |
| 2477 | ), |
| 2478 | Stream.runCollect |
| 2479 | ) |
| 2480 | deepStrictEqual(result, [0, 1, 2, 3]) |
| 2481 | })) |
| 2482 | }) |
| 2483 | |
| 2484 | it.effect("onStart", () => |
| 2485 | Effect.gen(function*() { |
| 2486 | let counter = 0 |
| 2487 | const result = yield* pipe( |
| 2488 | Stream.make(1, 1), |
| 2489 | Stream.onStart(Effect.sync(() => counter++)), |
| 2490 | Stream.runCollect |
| 2491 | ) |
| 2492 | strictEqual(counter, 1) |
| 2493 | deepStrictEqual(result, [1, 1]) |
| 2494 | })) |
| 2495 | |
| 2496 | it.effect("onEnd", () => |
| 2497 | Effect.gen(function*() { |
| 2498 | let counter = 0 |
| 2499 | const result = yield* pipe( |
| 2500 | Stream.make(1, 2, 3), |
| 2501 | Stream.onEnd(Effect.sync(() => counter++)), |
| 2502 | Stream.runCollect |
| 2503 | ) |
| 2504 | strictEqual(counter, 1) |
| 2505 | deepStrictEqual(result, [1, 2, 3]) |
| 2506 | })) |
| 2507 | |
| 2508 | describe("groupAdjacentBy", () => { |
| 2509 | it.effect("one big chunk", () => |
| 2510 | Effect.gen(function*() { |
| 2511 | const result = yield* pipe( |
| 2512 | Stream.fromIterable([ |
| 2513 | { code: 1, message: "A" }, |
| 2514 | { code: 1, message: "B" }, |
| 2515 | { code: 1, message: "D" }, |
| 2516 | { code: 2, message: "C" } |
| 2517 | ]), |
| 2518 | Stream.groupAdjacentBy((x) => x.code), |
| 2519 | Stream.runCollect |
| 2520 | ) |
| 2521 | deepStrictEqual( |
| 2522 | result.map(([, chunk]) => chunk), |
| 2523 | [ |
| 2524 | [ |
| 2525 | { code: 1, message: "A" }, |
| 2526 | { code: 1, message: "B" }, |
| 2527 | { code: 1, message: "D" } |
| 2528 | ], |
| 2529 | [ |
| 2530 | { code: 2, message: "C" } |
| 2531 | ] |
| 2532 | ] |
| 2533 | ) |
| 2534 | })) |
| 2535 | |
| 2536 | it.effect("several single element chunks", () => |
| 2537 | Effect.gen(function*() { |
| 2538 | const result = yield* pipe( |
| 2539 | Stream.fromArrays( |
| 2540 | [{ code: 1, message: "A" }], |
| 2541 | [{ code: 1, message: "B" }], |
| 2542 | [{ code: 1, message: "D" }], |
| 2543 | [{ code: 2, message: "C" }] |
| 2544 | ), |
| 2545 | Stream.groupAdjacentBy((x) => x.code), |
| 2546 | Stream.runCollect |
| 2547 | ) |
| 2548 | deepStrictEqual( |
| 2549 | result.map(([, chunk]) => chunk), |
| 2550 | [ |
| 2551 | [ |
| 2552 | { code: 1, message: "A" }, |
| 2553 | { code: 1, message: "B" }, |
| 2554 | { code: 1, message: "D" } |
| 2555 | ], |
| 2556 | [ |
| 2557 | { code: 2, message: "C" } |
| 2558 | ] |
| 2559 | ] |
| 2560 | ) |
| 2561 | })) |
| 2562 | |
| 2563 | it.effect("group across chunks", () => |
| 2564 | Effect.gen(function*() { |
| 2565 | const result = yield* pipe( |
| 2566 | Stream.fromArrays( |
| 2567 | [{ code: 1, message: "A" }, { code: 1, message: "B" }], |
| 2568 | [{ code: 1, message: "D" }, { code: 2, message: "C" }] |
| 2569 | ), |
| 2570 | Stream.groupAdjacentBy((x) => x.code), |
| 2571 | Stream.runCollect |
| 2572 | ) |
| 2573 | deepStrictEqual( |
| 2574 | result.map(([, chunk]) => chunk), |
| 2575 | [ |
| 2576 | [ |
| 2577 | { code: 1, message: "A" }, |
| 2578 | { code: 1, message: "B" }, |
| 2579 | { code: 1, message: "D" } |
| 2580 | ], |
| 2581 | [ |
| 2582 | { code: 2, message: "C" } |
| 2583 | ] |
| 2584 | ] |
| 2585 | ) |
| 2586 | })) |
| 2587 | }) |
| 2588 | |
| 2589 | describe("aggregateWithin", () => { |
| 2590 | it.effect("does not step the schedule while upstream is idle", () => |
| 2591 | Effect.gen(function*() { |
| 2592 | let steps = 0 |
| 2593 | const schedule = Schedule.spaced("10 millis").pipe( |
| 2594 | Schedule.tap(() => Effect.sync(() => steps++)) |
| 2595 | ) |
| 2596 | const fiber = yield* Stream.never.pipe( |
| 2597 | Stream.aggregateWithin(Sink.take(25), schedule), |
| 2598 | Stream.runDrain, |
| 2599 | Effect.forkChild({ startImmediately: true }) |
| 2600 | ) |
| 2601 | yield* TestClock.adjust("1 second") |
| 2602 | assert.strictEqual(steps, 0) |
| 2603 | yield* Fiber.interrupt(fiber) |
| 2604 | })) |
| 2605 | |
| 2606 | it.effect("schedule exhaustion drains sink leftovers without pulling more upstream", () => |
| 2607 | Effect.gen(function*() { |
| 2608 | let pulls = 0 |
| 2609 | const result = yield* Stream.make(1, 2, 3, 4, 5).pipe( |
| 2610 | Stream.concat(Stream.fromEffect(Effect.sync(() => ++pulls))), |
| 2611 | Stream.aggregateWithin( |
| 2612 | Sink.take(2).pipe(Sink.mapEffect((batch) => Effect.as(Effect.yieldNow, batch))), |
| 2613 | Schedule.forever.pipe(Schedule.upTo({ times: 0 })) |
| 2614 | ), |
| 2615 | Stream.runCollect |
| 2616 | ) |
| 2617 | |
| 2618 | assert.strictEqual(pulls, 0) |
| 2619 | assert.deepStrictEqual(result, [[1, 2], [3, 4], [5]]) |
| 2620 | })) |
| 2621 | |
| 2622 | it.effect("groupedWithin starts each window at its first element", () => |
| 2623 | Effect.gen(function*() { |
| 2624 | const queue = yield* Queue.unbounded<number>() |
| 2625 | const batches: Array<[number, ReadonlyArray<number>]> = [] |
| 2626 | yield* Stream.fromQueue(queue).pipe( |
| 2627 | Stream.groupedWithin(10, "100 millis"), |
| 2628 | Stream.runForEach((batch) => |
| 2629 | Effect.flatMap(Clock.currentTimeMillis, (now) => Effect.sync(() => batches.push([now, batch]))) |
| 2630 | ), |
| 2631 | Effect.forkChild({ startImmediately: true }) |
| 2632 | ) |
| 2633 | |
| 2634 | yield* TestClock.adjust("1030 millis") |
| 2635 | yield* Queue.offer(queue, 1) |
| 2636 | yield* TestClock.adjust("50 millis") |
| 2637 | yield* Queue.offer(queue, 2) |
| 2638 | yield* TestClock.adjust("1000 millis") |
| 2639 | yield* Queue.offer(queue, 3) |
| 2640 | yield* TestClock.adjust("100 millis") |
| 2641 | |
| 2642 | deepStrictEqual(batches, [[1130, [1, 2]], [2180, [3]]]) |
| 2643 | })) |
| 2644 | |
| 2645 | it.effect("groupedWithin does not emit empty arrays when upstream is idle", () => |
| 2646 | Effect.gen(function*() { |
| 2647 | const fiber = yield* Stream.never.pipe( |
| 2648 | Stream.groupedWithin(25, "50 millis"), |
| 2649 | Stream.take(5), |
| 2650 | Stream.runCollect, |
| 2651 | Effect.forkChild({ startImmediately: true }) |
| 2652 | ) |
| 2653 | yield* TestClock.adjust("1 second") |
| 2654 | assert.isUndefined(fiber.pollUnsafe()) |
| 2655 | })) |
| 2656 | |
| 2657 | it.effect("groupedWithin normalizes the chunk size", () => |
| 2658 | Effect.gen(function*() { |
| 2659 | const results = yield* Effect.forEach([Number.NaN, 0.5, 1.9, 2.9], (n) => |
| 2660 | Stream.make(1, 2, 3).pipe( |
| 2661 | Stream.groupedWithin(n, "1 hour"), |
| 2662 | Stream.runCollect |
| 2663 | )) |
| 2664 | assert.deepStrictEqual(results, [ |
| 2665 | [[1], [2], [3]], |
| 2666 | [[1], [2], [3]], |
| 2667 | [[1], [2], [3]], |
| 2668 | [[1, 2], [3]] |
| 2669 | ]) |
| 2670 | })) |
| 2671 | |
| 2672 | it.effect("groupedWithin flushes final partial batch on upstream end without waiting for the schedule", () => |
| 2673 | Effect.gen(function*() { |
| 2674 | const result = yield* Stream.make(1, 2, 3, 4, 5).pipe( |
| 2675 | Stream.groupedWithin(3, "1 second"), |
| 2676 | Stream.runCollect |
| 2677 | ) |
| 2678 | deepStrictEqual(result, [[1, 2, 3], [4, 5]]) |
| 2679 | })) |
| 2680 | |
| 2681 | it.effect("groupedWithin flushes partial batch when the schedule elapses while upstream is idle", () => |
| 2682 | Effect.gen(function*() { |
| 2683 | const fiber = yield* Stream.make(1, 2, 3, 4, 5).pipe( |
| 2684 | Stream.concat(Stream.never), |
| 2685 | Stream.groupedWithin(3, "1 second"), |
| 2686 | Stream.take(2), |
| 2687 | Stream.runCollect, |
| 2688 | Effect.forkChild({ startImmediately: true }) |
| 2689 | ) |
| 2690 | yield* TestClock.adjust("1 second") |
| 2691 | const result = yield* Fiber.join(fiber) |
| 2692 | deepStrictEqual(result, [[1, 2, 3], [4, 5]]) |
| 2693 | })) |
| 2694 | |
| 2695 | it.effect("simple example", () => |
| 2696 | Effect.gen(function*() { |
| 2697 | const result = yield* pipe( |
| 2698 | Stream.make(1, 1, 1, 1, 2, 2), |
| 2699 | Stream.aggregateWithin( |
| 2700 | pipe( |
| 2701 | Sink.fold( |
| 2702 | () => [[] as Array<number>, true] as readonly [Array<number>, boolean], |
| 2703 | (tuple) => tuple[1], |
| 2704 | ([array], curr: number) => |
| 2705 | Effect.succeed<readonly [Array<number>, boolean]>( |
| 2706 | curr === 1 ? [[curr, ...array], true] : [[curr, ...array], false] |
| 2707 | ) |
| 2708 | ), |
| 2709 | Sink.map((tuple) => tuple[0]) |
| 2710 | ), |
| 2711 | Schedule.spaced(Duration.minutes(30)) |
| 2712 | ), |
| 2713 | Stream.runCollect |
| 2714 | ) |
| 2715 | deepStrictEqual(result, [[2, 1, 1, 1, 1], [2]]) |
| 2716 | })) |
| 2717 | |
| 2718 | it.effect("fails fast", () => |
| 2719 | Effect.gen(function*() { |
| 2720 | const queue = yield* Queue.unbounded<number>() |
| 2721 | yield* pipe( |
| 2722 | Stream.range(1, 9), |
| 2723 | Stream.tap((n) => |
| 2724 | pipe( |
| 2725 | Effect.fail("Boom"), |
| 2726 | Effect.when(Effect.sync(() => n === 6)), |
| 2727 | Effect.andThen(Queue.offer(queue, n)) |
| 2728 | ) |
| 2729 | ), |
| 2730 | Stream.aggregateWithin( |
| 2731 | Sink.foldUntil(constVoid, 5, () => Effect.void), |
| 2732 | Schedule.forever |
| 2733 | ), |
| 2734 | Stream.runDrain, |
| 2735 | Effect.catch(() => Effect.void) |
| 2736 | ) |
| 2737 | const result = yield* Queue.takeAll(queue) |
| 2738 | yield* Queue.shutdown(queue) |
| 2739 | deepStrictEqual(result, [1, 2, 3, 4, 5]) |
| 2740 | })) |
| 2741 | |
| 2742 | it.effect("error propagation #1", () => |
| 2743 | Effect.gen(function*() { |
| 2744 | const error = new Error("Boom") |
| 2745 | const result = yield* pipe( |
| 2746 | Stream.make(1, 1, 1, 1), |
| 2747 | Stream.aggregateWithin( |
| 2748 | Sink.die(error), |
| 2749 | Schedule.spaced(Duration.minutes(30)) |
| 2750 | ), |
| 2751 | Stream.runCollect, |
| 2752 | Effect.exit |
| 2753 | ) |
| 2754 | deepStrictEqual(result, Exit.die(error)) |
| 2755 | })) |
| 2756 | |
| 2757 | it.effect("error propagation #2", () => |
| 2758 | Effect.gen(function*() { |
| 2759 | const error = new Error("Boom") |
| 2760 | const result = yield* pipe( |
| 2761 | Stream.make(1, 1), |
| 2762 | Stream.aggregateWithin( |
| 2763 | Sink.fold(() => [], constTrue, () => Effect.die(error)), |
| 2764 | Schedule.spaced(Duration.minutes(30)) |
| 2765 | ), |
| 2766 | Stream.runCollect, |
| 2767 | Effect.exit |
| 2768 | ) |
| 2769 | deepStrictEqual(result, Exit.die(error)) |
| 2770 | })) |
| 2771 | |
| 2772 | it.effect("interruption propagation #1", () => |
| 2773 | Effect.gen(function*() { |
| 2774 | const latch = yield* Deferred.make<void>() |
| 2775 | const ref = yield* Ref.make(false) |
| 2776 | const sink = Sink.fold(Array.empty<number>, constTrue, (acc, curr: number) => { |
| 2777 | if (curr === 1) { |
| 2778 | acc.push(curr) |
| 2779 | return Effect.succeed(acc) |
| 2780 | } |
| 2781 | return pipe( |
| 2782 | Deferred.succeed(latch, void 0), |
| 2783 | Effect.andThen(Effect.never), |
| 2784 | Effect.onInterrupt(() => Ref.set(ref, true)) |
| 2785 | ) |
| 2786 | }) |
| 2787 | const fiber = yield* pipe( |
| 2788 | Stream.make(1, 1, 2), |
| 2789 | Stream.aggregateWithin(sink, Schedule.spaced(Duration.minutes(30))), |
| 2790 | Stream.runCollect, |
| 2791 | Effect.forkScoped |
| 2792 | ) |
| 2793 | yield* Deferred.await(latch) |
| 2794 | yield* Fiber.interrupt(fiber) |
| 2795 | const result = yield* Ref.get(ref) |
| 2796 | assertTrue(result) |
| 2797 | })) |
| 2798 | |
| 2799 | it.effect("interruption propagation #2", () => |
| 2800 | Effect.gen(function*() { |
| 2801 | const ref = yield* Ref.make(false) |
| 2802 | const sink = Sink.fromEffect( |
| 2803 | Effect.never.pipe( |
| 2804 | Effect.onInterrupt(() => Ref.set(ref, true)) |
| 2805 | ) |
| 2806 | ) |
| 2807 | const fiber = yield* Stream.make(1, 1, 2).pipe( |
| 2808 | Stream.aggregateWithin(sink, Schedule.spaced(Duration.minutes(30))), |
| 2809 | Stream.runCollect, |
| 2810 | Effect.forkScoped({ startImmediately: true }) |
| 2811 | ) |
| 2812 | yield* Fiber.interrupt(fiber) |
| 2813 | const result = yield* Ref.get(ref) |
| 2814 | assertTrue(result) |
| 2815 | })) |
| 2816 | |
| 2817 | // it.effect("leftover handling", () => |
| 2818 | // Effect.gen(function*() { |
| 2819 | // const input = [1, 2, 2, 3, 2, 3] |
| 2820 | // const fiber = yield* pipe( |
| 2821 | // Stream.fromIterable(input), |
| 2822 | // Stream.aggregateWithin( |
| 2823 | // Sink.foldWeighted({ |
| 2824 | // initial: Chunk.empty<number>(), |
| 2825 | // maxCost: 4, |
| 2826 | // cost: (_, n) => n, |
| 2827 | // body: (acc, curr) => Chunk.append(acc, curr) |
| 2828 | // }), |
| 2829 | // Schedule.spaced(Duration.millis(100)) |
| 2830 | // ), |
| 2831 | // Stream.flattenIterable, |
| 2832 | // Stream.runCollect, |
| 2833 | // Effect.forkScoped |
| 2834 | // ) |
| 2835 | // yield* TestClock.adjust(Duration.minutes(31)) |
| 2836 | // const result = yield* Fiber.join(fiber) |
| 2837 | // deepStrictEqual(result, input) |
| 2838 | // })) |
| 2839 | }) |
| 2840 | |
| 2841 | describe("debounce", () => { |
| 2842 | it.effect("should drop earlier chunks within waitTime", () => |
| 2843 | Effect.gen(function*() { |
| 2844 | const coordination = yield* chunkCoordination([ |
| 2845 | [1], |
| 2846 | [3, 4], |
| 2847 | [5], |
| 2848 | [6, 7] |
| 2849 | ]) |
| 2850 | const stream = pipe( |
| 2851 | coordination.stream, |
| 2852 | Stream.chunks, |
| 2853 | Stream.debounce(Duration.seconds(1)) |
| 2854 | ) |
| 2855 | const fiber = yield* pipe(stream, Stream.runCollect, Effect.forkScoped) |
| 2856 | yield* coordination.offer |
| 2857 | yield* pipe( |
| 2858 | Effect.sleep(Duration.millis(500)), |
| 2859 | Effect.andThen(coordination.offer), |
| 2860 | Effect.forkScoped |
| 2861 | ) |
| 2862 | yield* pipe( |
| 2863 | Effect.sleep(Duration.seconds(2)), |
| 2864 | Effect.andThen(coordination.offer), |
| 2865 | Effect.forkScoped |
| 2866 | ) |
| 2867 | yield* pipe( |
| 2868 | Effect.sleep(Duration.millis(2500)), |
| 2869 | Effect.andThen(coordination.offer), |
| 2870 | Effect.forkScoped |
| 2871 | ) |
| 2872 | yield* TestClock.adjust(Duration.millis(3500)) |
| 2873 | const result = yield* Fiber.join(fiber) |
| 2874 | deepStrictEqual( |
| 2875 | result, |
| 2876 | [[3, 4], [6, 7]] |
| 2877 | ) |
| 2878 | })) |
| 2879 | |
| 2880 | it.effect("should take latest chunk within waitTime", () => |
| 2881 | Effect.gen(function*() { |
| 2882 | const coordination = yield* chunkCoordination([ |
| 2883 | [1, 2], |
| 2884 | [3, 4], |
| 2885 | [5, 6] |
| 2886 | ]) |
| 2887 | const stream = pipe( |
| 2888 | coordination.stream, |
| 2889 | Stream.chunks, |
| 2890 | Stream.debounce(Duration.seconds(1)) |
| 2891 | ) |
| 2892 | const fiber = yield* pipe(stream, Stream.runCollect, Effect.forkScoped) |
| 2893 | yield* pipe( |
| 2894 | coordination.offer, |
| 2895 | Effect.andThen(coordination.offer), |
| 2896 | Effect.andThen(coordination.offer) |
| 2897 | ) |
| 2898 | yield* TestClock.adjust(Duration.seconds(1)) |
| 2899 | const result = yield* Fiber.join(fiber) |
| 2900 | deepStrictEqual(result, [[5, 6]]) |
| 2901 | })) |
| 2902 | |
| 2903 | it.effect("should work properly with parallelization", () => |
| 2904 | Effect.gen(function*() { |
| 2905 | const coordination = yield* chunkCoordination([ |
| 2906 | [1], |
| 2907 | [2], |
| 2908 | [3] |
| 2909 | ]) |
| 2910 | const stream = pipe( |
| 2911 | coordination.stream, |
| 2912 | Stream.chunks, |
| 2913 | Stream.debounce(Duration.seconds(1)) |
| 2914 | ) |
| 2915 | const fiber = yield* pipe(stream, Stream.runCollect, Effect.forkScoped) |
| 2916 | yield* Effect.all([ |
| 2917 | coordination.offer, |
| 2918 | coordination.offer, |
| 2919 | coordination.offer |
| 2920 | ], { concurrency: 3, discard: true }) |
| 2921 | yield* TestClock.adjust(Duration.seconds(1)) |
| 2922 | const result = yield* Fiber.join(fiber) |
| 2923 | deepStrictEqual(result, [[3]]) |
| 2924 | })) |
| 2925 | |
| 2926 | it.effect("should handle empty chunks properly", () => |
| 2927 | Effect.gen(function*() { |
| 2928 | const fiber = yield* pipe( |
| 2929 | Stream.make(1, 2, 3), |
| 2930 | Stream.tap(() => Effect.sleep(Duration.millis(500))), |
| 2931 | Stream.debounce(Duration.seconds(1)), |
| 2932 | Stream.runCollect, |
| 2933 | Effect.forkScoped({ startImmediately: true }) |
| 2934 | ) |
| 2935 | yield* TestClock.adjust(Duration.seconds(3)) |
| 2936 | const result = yield* Fiber.join(fiber) |
| 2937 | deepStrictEqual(result, [3]) |
| 2938 | })) |
| 2939 | |
| 2940 | it.effect("should fail immediately", () => |
| 2941 | Effect.gen(function*() { |
| 2942 | const result = yield* pipe( |
| 2943 | Stream.fromEffect(Effect.fail(Option.none())), |
| 2944 | Stream.debounce(Duration.infinity), |
| 2945 | Stream.runCollect, |
| 2946 | Effect.exit |
| 2947 | ) |
| 2948 | assertExitFailure(result, Cause.fail(Option.none())) |
| 2949 | })) |
| 2950 | |
| 2951 | it.effect("should work with empty streams", () => |
| 2952 | Effect.gen(function*() { |
| 2953 | const result = yield* pipe( |
| 2954 | Stream.empty, |
| 2955 | Stream.debounce(Duration.seconds(5)), |
| 2956 | Stream.runCollect |
| 2957 | ) |
| 2958 | assertTrue(result.length === 0) |
| 2959 | })) |
| 2960 | |
| 2961 | it.effect("should pick last element from every chunk", () => |
| 2962 | Effect.gen(function*() { |
| 2963 | const fiber = yield* pipe( |
| 2964 | Stream.make(1, 2, 3), |
| 2965 | Stream.debounce(Duration.seconds(1)), |
| 2966 | Stream.runCollect, |
| 2967 | Effect.forkScoped |
| 2968 | ) |
| 2969 | yield* TestClock.adjust(Duration.seconds(1)) |
| 2970 | const result = yield* Fiber.join(fiber) |
| 2971 | deepStrictEqual(result, [3]) |
| 2972 | })) |
| 2973 | |
| 2974 | it.effect("should interrupt fibers properly", () => |
| 2975 | Effect.gen(function*() { |
| 2976 | const coordination = yield* chunkCoordination([ |
| 2977 | [1], |
| 2978 | [2], |
| 2979 | [3] |
| 2980 | ]) |
| 2981 | const fiber = yield* pipe( |
| 2982 | coordination.stream, |
| 2983 | Stream.chunks, |
| 2984 | Stream.tap(() => coordination.proceed), |
| 2985 | Stream.flattenArray, |
| 2986 | Stream.debounce(Duration.millis(200)), |
| 2987 | // Stream.interruptWhen(Effect.never), |
| 2988 | Stream.take(1), |
| 2989 | Stream.runCollect, |
| 2990 | Effect.forkScoped |
| 2991 | ) |
| 2992 | yield* pipe( |
| 2993 | coordination.offer, |
| 2994 | Effect.andThen(TestClock.adjust(Duration.millis(100))), |
| 2995 | Effect.andThen(coordination.awaitNext), |
| 2996 | Effect.repeat({ times: 2 }) |
| 2997 | ) |
| 2998 | yield* TestClock.adjust(Duration.millis(100)) |
| 2999 | const result = yield* Fiber.join(fiber) |
| 3000 | deepStrictEqual(result, [3]) |
| 3001 | })) |
| 3002 | |
| 3003 | it.effect("should interrupt children fiber on stream interruption", () => |
| 3004 | Effect.gen(function*() { |
| 3005 | const ref = yield* (Ref.make(false)) |
| 3006 | const fiber = yield* pipe( |
| 3007 | Stream.fromEffect(Effect.void), |
| 3008 | Stream.concat(Stream.fromEffect(pipe( |
| 3009 | Effect.never, |
| 3010 | Effect.onInterrupt(() => Ref.set(ref, true)) |
| 3011 | ))), |
| 3012 | Stream.debounce(Duration.millis(800)), |
| 3013 | Stream.runDrain, |
| 3014 | Effect.forkScoped |
| 3015 | ) |
| 3016 | yield* TestClock.adjust(Duration.minutes(1)) |
| 3017 | yield* Fiber.interrupt(fiber) |
| 3018 | const result = yield* Ref.get(ref) |
| 3019 | assertTrue(result) |
| 3020 | })) |
| 3021 | }) |
| 3022 | |
| 3023 | describe("throttle", () => { |
| 3024 | it.effect("throttleEnforce - free elements", () => |
| 3025 | Effect.gen(function*() { |
| 3026 | const result = yield* pipe( |
| 3027 | Stream.make(1, 2, 3, 4), |
| 3028 | Stream.throttle({ |
| 3029 | cost: () => 0, |
| 3030 | units: 0, |
| 3031 | duration: Duration.infinity, |
| 3032 | strategy: "enforce" |
| 3033 | }), |
| 3034 | Stream.runCollect |
| 3035 | ) |
| 3036 | deepStrictEqual(result, [1, 2, 3, 4]) |
| 3037 | })) |
| 3038 | |
| 3039 | it.effect("throttleEnforce - no bandwidth", () => |
| 3040 | Effect.gen(function*() { |
| 3041 | const result = yield* pipe( |
| 3042 | Stream.make(1, 2, 3, 4), |
| 3043 | Stream.throttle({ |
| 3044 | cost: () => 1, |
| 3045 | units: 0, |
| 3046 | duration: Duration.infinity, |
| 3047 | strategy: "enforce" |
| 3048 | }), |
| 3049 | Stream.runCollect |
| 3050 | ) |
| 3051 | assertTrue(result.length === 0) |
| 3052 | })) |
| 3053 | |
| 3054 | it.effect("throttleEnforce - refill bucket tokens", () => |
| 3055 | Effect.gen(function*() { |
| 3056 | const fiber = yield* pipe( |
| 3057 | Stream.fromSchedule(Schedule.spaced(Duration.millis(100))), |
| 3058 | Stream.take(10), |
| 3059 | Stream.throttle({ |
| 3060 | cost: () => 1, |
| 3061 | units: 1, |
| 3062 | duration: Duration.millis(200), |
| 3063 | strategy: "enforce" |
| 3064 | }), |
| 3065 | Stream.runCollect, |
| 3066 | Effect.forkScoped |
| 3067 | ) |
| 3068 | yield* TestClock.adjust(Duration.seconds(1)) |
| 3069 | const result = yield* Fiber.join(fiber) |
| 3070 | deepStrictEqual(result, [0, 2, 4, 6, 8]) |
| 3071 | })) |
| 3072 | |
| 3073 | it.effect("throttleShape", () => |
| 3074 | Effect.gen(function*() { |
| 3075 | const queue = yield* Queue.unbounded<number>() |
| 3076 | const fiber = yield* pipe( |
| 3077 | Stream.fromQueue(queue), |
| 3078 | Stream.throttle({ |
| 3079 | strategy: "shape", |
| 3080 | cost: (arr) => arr.reduce((a, b) => a + b, 0), |
| 3081 | units: 1, |
| 3082 | duration: Duration.seconds(1) |
| 3083 | }), |
| 3084 | Stream.toPull, |
| 3085 | Effect.flatMap((pull) => |
| 3086 | Effect.gen(function*() { |
| 3087 | yield* Queue.offer(queue, 1) |
| 3088 | const result1 = yield* pull |
| 3089 | yield* Queue.offer(queue, 2) |
| 3090 | const result2 = yield* pull |
| 3091 | yield* Effect.sleep(Duration.seconds(4)) |
| 3092 | yield* Queue.offer(queue, 3) |
| 3093 | const result3 = yield* pull |
| 3094 | return [result1, result2, result3] as const |
| 3095 | }) |
| 3096 | ), |
| 3097 | Effect.scoped, |
| 3098 | Effect.forkScoped |
| 3099 | ) |
| 3100 | yield* TestClock.adjust(Duration.seconds(8)) |
| 3101 | const result = yield* Fiber.join(fiber) |
| 3102 | deepStrictEqual(result, [[1], [2], [3]]) |
| 3103 | })) |
| 3104 | |
| 3105 | it.effect("throttleShape - infinite bandwidth", () => |
| 3106 | Effect.gen(function*() { |
| 3107 | const queue = yield* Queue.unbounded<number>() |
| 3108 | const result = yield* pipe( |
| 3109 | Stream.fromQueue(queue), |
| 3110 | Stream.throttle({ |
| 3111 | strategy: "shape", |
| 3112 | cost: () => 100_000, |
| 3113 | units: 1, |
| 3114 | duration: Duration.zero |
| 3115 | }), |
| 3116 | Stream.toPull, |
| 3117 | Effect.flatMap((pull) => |
| 3118 | Effect.gen(function*() { |
| 3119 | yield* Queue.offer(queue, 1) |
| 3120 | const result1 = yield* pull |
| 3121 | yield* Queue.offer(queue, 2) |
| 3122 | const result2 = yield* pull |
| 3123 | return [result1, result2] as const |
| 3124 | }) |
| 3125 | ), |
| 3126 | Effect.scoped |
| 3127 | ) |
| 3128 | deepStrictEqual(result, [[1], [2]]) |
| 3129 | })) |
| 3130 | |
| 3131 | it.effect("throttleShape - with burst", () => |
| 3132 | Effect.gen(function*() { |
| 3133 | const queue = yield* Queue.unbounded<number>() |
| 3134 | const fiber = yield* pipe( |
| 3135 | Stream.fromQueue(queue), |
| 3136 | Stream.throttle({ |
| 3137 | strategy: "shape", |
| 3138 | cost: (arr) => arr.reduce((a, b) => a + b, 0), |
| 3139 | units: 1, |
| 3140 | duration: Duration.seconds(1), |
| 3141 | burst: 2 |
| 3142 | }), |
| 3143 | Stream.toPull, |
| 3144 | Effect.flatMap((pull) => |
| 3145 | Effect.gen(function*() { |
| 3146 | yield* Queue.offer(queue, 1) |
| 3147 | const result1 = yield* pull |
| 3148 | yield* TestClock.adjust(Duration.seconds(2)) |
| 3149 | yield* Queue.offer(queue, 2) |
| 3150 | const result2 = yield* pull |
| 3151 | yield* TestClock.adjust(Duration.seconds(4)) |
| 3152 | yield* Queue.offer(queue, 3) |
| 3153 | const result3 = yield* pull |
| 3154 | return [result1, result2, result3] as const |
| 3155 | }) |
| 3156 | ), |
| 3157 | Effect.scoped, |
| 3158 | Effect.forkScoped |
| 3159 | ) |
| 3160 | const result = yield* Fiber.join(fiber) |
| 3161 | deepStrictEqual(result, [[1], [2], [3]]) |
| 3162 | })) |
| 3163 | |
| 3164 | it.effect("throttleShape - free elements", () => |
| 3165 | Effect.gen(function*() { |
| 3166 | const result = yield* pipe( |
| 3167 | Stream.make(1, 2, 3, 4), |
| 3168 | Stream.throttle({ |
| 3169 | strategy: "shape", |
| 3170 | cost: () => 0, |
| 3171 | units: 1, |
| 3172 | duration: Duration.infinity |
| 3173 | }), |
| 3174 | Stream.runCollect |
| 3175 | ) |
| 3176 | deepStrictEqual(result, [1, 2, 3, 4]) |
| 3177 | })) |
| 3178 | |
| 3179 | it.effect("throttleShape - keeps the rate when sleeps end early", () => |
| 3180 | Effect.gen(function*() { |
| 3181 | const clock = yield* Clock.Clock |
| 3182 | const earlyClock: Clock.Clock = { |
| 3183 | ...clock, |
| 3184 | monotonicTimeNanosUnsafe: () => (1n << 80n) + clock.monotonicTimeNanosUnsafe(), |
| 3185 | sleep: (duration) => clock.sleep(Duration.millis(Duration.toMillis(duration) - 1)) |
| 3186 | } |
| 3187 | const fiber = yield* pipe( |
| 3188 | Stream.range(1, 3), |
| 3189 | Stream.rechunk(1), |
| 3190 | Stream.throttle({ |
| 3191 | strategy: "shape", |
| 3192 | cost: (arr) => arr.length, |
| 3193 | units: 1, |
| 3194 | duration: Duration.seconds(1) |
| 3195 | }), |
| 3196 | Stream.mapEffect(() => clock.currentTimeMillis), |
| 3197 | Stream.runCollect, |
| 3198 | Effect.provideService(Clock.Clock, earlyClock), |
| 3199 | Effect.forkScoped |
| 3200 | ) |
| 3201 | yield* TestClock.adjust(Duration.seconds(3)) |
| 3202 | const timestamps = yield* Fiber.join(fiber) |
| 3203 | deepStrictEqual(timestamps, [0, 999, 1999], "Early wake-ups must not accumulate rate drift") |
| 3204 | })) |
| 3205 | |
| 3206 | it.effect("throttleShape - is not affected by wall clock changes", () => |
| 3207 | Effect.gen(function*() { |
| 3208 | const clock = yield* Clock.Clock |
| 3209 | let offset = 0 |
| 3210 | const shiftedClock: Clock.Clock = { |
| 3211 | ...clock, |
| 3212 | currentTimeMillisUnsafe: () => clock.currentTimeMillisUnsafe() + offset |
| 3213 | } |
| 3214 | const fiber = yield* pipe( |
| 3215 | Stream.range(1, 2), |
| 3216 | Stream.rechunk(1), |
| 3217 | Stream.throttle({ |
| 3218 | strategy: "shape", |
| 3219 | cost: (arr) => arr.length, |
| 3220 | units: 1, |
| 3221 | duration: Duration.seconds(1) |
| 3222 | }), |
| 3223 | Stream.tap((n) => |
| 3224 | Effect.sync(() => { |
| 3225 | if (n === 1) offset = -5000 |
| 3226 | }) |
| 3227 | ), |
| 3228 | Stream.mapEffect(() => clock.currentTimeMillis), |
| 3229 | Stream.runCollect, |
| 3230 | Effect.provideService(Clock.Clock, shiftedClock), |
| 3231 | Effect.forkScoped |
| 3232 | ) |
| 3233 | yield* TestClock.adjust(Duration.seconds(6)) |
| 3234 | const timestamps = yield* Fiber.join(fiber) |
| 3235 | deepStrictEqual(timestamps, [0, 1000], "Wall clock changes must not affect the refill rate") |
| 3236 | })) |
| 3237 | }) |
| 3238 | |
| 3239 | describe("zipping", () => { |
| 3240 | it.effect("zipWith - combines elements point-wise", () => |
| 3241 | Effect.gen(function*() { |
| 3242 | const stream1 = Stream.make(1, 2, 3) |
| 3243 | const stream2 = Stream.make("a", "b", "c") |
| 3244 | const result = yield* Stream.zipWith(stream1, stream2, (n, s) => `${n}-${s}`).pipe( |
| 3245 | Stream.runCollect |
| 3246 | ) |
| 3247 | assert.deepStrictEqual(result, ["1-a", "2-b", "3-c"]) |
| 3248 | })) |
| 3249 | |
| 3250 | it.effect("zipWith - stops when shortest stream ends", () => |
| 3251 | Effect.gen(function*() { |
| 3252 | const stream1 = Stream.make(1, 2, 3, 4, 5, 6) |
| 3253 | const stream2 = Stream.make("a", "b", "c") |
| 3254 | const result = yield* Stream.zipWith(stream1, stream2, (n, s) => `${n}-${s}`).pipe( |
| 3255 | Stream.runCollect |
| 3256 | ) |
| 3257 | assert.deepStrictEqual(result, ["1-a", "2-b", "3-c"]) |
| 3258 | })) |
| 3259 | |
| 3260 | it.effect("zipWith - does not pull too much when one stream ends", () => |
| 3261 | Effect.gen(function*() { |
| 3262 | const left = Stream.fromArrays([1, 2], [3, 4], [5]).pipe( |
| 3263 | Stream.concat(Stream.fail("boom")) |
| 3264 | ) |
| 3265 | const right = Stream.fromArrays(["a", "b"], ["c"]) |
| 3266 | const result = yield* Stream.zipWith(left, right, (n, s) => [n, s] as const).pipe( |
| 3267 | Stream.runCollect |
| 3268 | ) |
| 3269 | assert.deepStrictEqual(result, [[1, "a"], [2, "b"], [3, "c"]]) |
| 3270 | })) |
| 3271 | |
| 3272 | it.effect("zipWith - prioritizes failures", () => |
| 3273 | Effect.gen(function*() { |
| 3274 | const result = yield* Stream.zipWith( |
| 3275 | Stream.never, |
| 3276 | Stream.fail("Ouch"), |
| 3277 | (a, b) => [a, b] |
| 3278 | ).pipe( |
| 3279 | Stream.runCollect, |
| 3280 | Effect.exit |
| 3281 | ) |
| 3282 | assertExitFailure(result, Cause.fail("Ouch")) |
| 3283 | })) |
| 3284 | |
| 3285 | it.effect("zipWith - handles exceptions", () => |
| 3286 | Effect.gen(function*() { |
| 3287 | const error = new Error("Ouch") |
| 3288 | const result = yield* Stream.make(1).pipe( |
| 3289 | Stream.flatMap(() => |
| 3290 | Stream.sync(() => { |
| 3291 | throw error |
| 3292 | }) |
| 3293 | ), |
| 3294 | Stream.zipWith(Stream.make(1), (a, b) => [a, b]), |
| 3295 | Stream.runCollect, |
| 3296 | Effect.exit |
| 3297 | ) |
| 3298 | assertExitFailure(result, Cause.die(error)) |
| 3299 | })) |
| 3300 | |
| 3301 | it.effect("zipWith - handles empty streams", () => |
| 3302 | Effect.gen(function*() { |
| 3303 | const result1 = yield* Stream.zipWith( |
| 3304 | Stream.empty, |
| 3305 | Stream.make(1, 2, 3), |
| 3306 | (a, b) => [a, b] |
| 3307 | ).pipe(Stream.runCollect) |
| 3308 | |
| 3309 | const result2 = yield* Stream.zipWith( |
| 3310 | Stream.make(1, 2, 3), |
| 3311 | Stream.empty, |
| 3312 | (a, b) => [a, b] |
| 3313 | ).pipe(Stream.runCollect) |
| 3314 | |
| 3315 | assert.strictEqual(result1.length, 0) |
| 3316 | assert.strictEqual(result2.length, 0) |
| 3317 | })) |
| 3318 | |
| 3319 | it.effect.prop( |
| 3320 | "zipWith - equivalence with array operations", |
| 3321 | { |
| 3322 | left: Schema.Array(Schema.Int), |
| 3323 | right: Schema.Array(Schema.Int) |
| 3324 | }, |
| 3325 | Effect.fnUntraced(function*({ left, right }) { |
| 3326 | const stream = Stream.zipWith( |
| 3327 | Stream.fromIterable(left), |
| 3328 | Stream.fromIterable(right), |
| 3329 | (a, b) => a + b |
| 3330 | ) |
| 3331 | const result = yield* Stream.runCollect(stream) |
| 3332 | |
| 3333 | const minLength = Math.min(left.length, right.length) |
| 3334 | const expected = Array.empty<number>() |
| 3335 | for (let i = 0; i < minLength; i++) { |
| 3336 | expected.push(left[i] + right[i]) |
| 3337 | } |
| 3338 | |
| 3339 | assert.deepStrictEqual(result, expected) |
| 3340 | }) |
| 3341 | ) |
| 3342 | |
| 3343 | describe("zipWithArray", () => { |
| 3344 | it.effect("basic zipping with equal length streams", () => |
| 3345 | Effect.gen(function*() { |
| 3346 | const stream1 = Stream.make(1, 2, 3) |
| 3347 | const stream2 = Stream.make("a", "b", "c") |
| 3348 | const result = yield* Stream.zipWithArray(stream1, stream2, (left, right) => { |
| 3349 | const minLength = Math.min(left.length, right.length) |
| 3350 | const output = Array.makeBy(minLength, (i: number) => [left[i], right[i]] as const) |
| 3351 | return [output, left.slice(minLength), right.slice(minLength)] |
| 3352 | }).pipe(Stream.runCollect) |
| 3353 | |
| 3354 | assert.deepStrictEqual(result, [[1, "a"], [2, "b"], [3, "c"]]) |
| 3355 | })) |
| 3356 | |
| 3357 | it.effect("left stream shorter than right", () => |
| 3358 | Effect.gen(function*() { |
| 3359 | const stream1 = Stream.make(1, 2, 3) |
| 3360 | const stream2 = Stream.make("a", "b", "c", "d", "e") |
| 3361 | const result = yield* Stream.zipWithArray(stream1, stream2, (left, right) => { |
| 3362 | const minLength = Math.min(left.length, right.length) |
| 3363 | const output = Array.makeBy(minLength, (i: number) => [left[i], right[i]] as const) |
| 3364 | return [output, left.slice(minLength), right.slice(minLength)] |
| 3365 | }).pipe(Stream.runCollect) |
| 3366 | |
| 3367 | assert.deepStrictEqual(result, [[1, "a"], [2, "b"], [3, "c"]]) |
| 3368 | })) |
| 3369 | |
| 3370 | it.effect("right stream shorter than left", () => |
| 3371 | Effect.gen(function*() { |
| 3372 | const stream1 = Stream.make(1, 2, 3, 4, 5) |
| 3373 | const stream2 = Stream.make("a", "b", "c") |
| 3374 | const result = yield* Stream.zipWithArray(stream1, stream2, (left, right) => { |
| 3375 | const minLength = Math.min(left.length, right.length) |
| 3376 | const output = Array.makeBy(minLength, (i: number) => [left[i], right[i]] as const) |
| 3377 | return [output, left.slice(minLength), right.slice(minLength)] |
| 3378 | }).pipe(Stream.runCollect) |
| 3379 | |
| 3380 | assert.deepStrictEqual(result, [[1, "a"], [2, "b"], [3, "c"]]) |
| 3381 | })) |
| 3382 | |
| 3383 | it.effect("multiple arrays from each stream", () => |
| 3384 | Effect.gen(function*() { |
| 3385 | const stream1 = Stream.fromArrays([1, 2], [3, 4], [5, 6]) |
| 3386 | const stream2 = Stream.fromArrays(["a", "b"], ["c", "d"], ["e", "f"]) |
| 3387 | const result = yield* Stream.zipWithArray(stream1, stream2, (left, right) => { |
| 3388 | const minLength = Math.min(left.length, right.length) |
| 3389 | const output = Array.makeBy(minLength, (i: number) => [left[i], right[i]] as const) |
| 3390 | return [output, left.slice(minLength), right.slice(minLength)] |
| 3391 | }).pipe(Stream.runCollect) |
| 3392 | |
| 3393 | assert.deepStrictEqual(result, [[1, "a"], [2, "b"], [3, "c"], [4, "d"], [5, "e"], [6, "f"]]) |
| 3394 | })) |
| 3395 | |
| 3396 | it.effect("handles leftover elements correctly", () => |
| 3397 | Effect.gen(function*() { |
| 3398 | const stream1 = Stream.fromArrays([1, 2, 3], [4, 5]) |
| 3399 | const stream2 = Stream.fromArrays(["a", "b"], ["c", "d", "e"]) |
| 3400 | let leftLeftovers = 0 |
| 3401 | let rightLeftovers = 0 |
| 3402 | |
| 3403 | const result = yield* Stream.zipWithArray(stream1, stream2, (left, right) => { |
| 3404 | const minLength = Math.min(left.length, right.length) |
| 3405 | const output = Array.makeBy(minLength, (i: number) => [left[i], right[i]] as const) |
| 3406 | const leftSlice = left.slice(minLength) |
| 3407 | const rightSlice = right.slice(minLength) |
| 3408 | if (leftSlice.length > 0) { |
| 3409 | leftLeftovers++ |
| 3410 | } else if (rightSlice.length > 0) { |
| 3411 | rightLeftovers++ |
| 3412 | } |
| 3413 | return [output, leftSlice, rightSlice] |
| 3414 | }).pipe(Stream.runCollect) |
| 3415 | |
| 3416 | assert.deepStrictEqual(result, [[1, "a"], [2, "b"], [3, "c"], [4, "d"], [5, "e"]]) |
| 3417 | assert.isTrue(leftLeftovers > 0 || rightLeftovers > 0) |
| 3418 | })) |
| 3419 | |
| 3420 | it.effect("error propagation from left stream", () => |
| 3421 | Effect.gen(function*() { |
| 3422 | const result = yield* Stream.zipWithArray( |
| 3423 | Stream.make(1, 2).pipe(Stream.concat(Stream.fail("boom"))), |
| 3424 | Stream.make("a", "b", "c"), |
| 3425 | (left, right) => { |
| 3426 | const minLength = Math.min(left.length, right.length) |
| 3427 | const output = Array.makeBy(minLength, (i: number) => [left[i], right[i]] as const) |
| 3428 | return [output, [], []] |
| 3429 | } |
| 3430 | ).pipe(Stream.runCollect, Effect.exit) |
| 3431 | |
| 3432 | assertExitFailure(result, Cause.fail("boom")) |
| 3433 | })) |
| 3434 | |
| 3435 | // Keep the left stream alive: once either side ends, later errors from the other side are not observed. |
| 3436 | it.effect("error propagation from right stream", () => |
| 3437 | Effect.gen(function*() { |
| 3438 | const result = yield* Stream.zipWithArray( |
| 3439 | Stream.fromArrays([1, 2, 3], [4]), |
| 3440 | Stream.make("a", "b").pipe(Stream.concat(Stream.fail("boom"))), |
| 3441 | (left, right) => { |
| 3442 | const minLength = Math.min(left.length, right.length) |
| 3443 | const output = Array.makeBy(minLength, (i: number) => [left[i], right[i]] as const) |
| 3444 | return [output, [], []] |
| 3445 | } |
| 3446 | ).pipe(Stream.runCollect, Effect.exit) |
| 3447 | |
| 3448 | assertExitFailure(result, Cause.fail("boom")) |
| 3449 | })) |
| 3450 | |
| 3451 | it.effect("handles empty streams", () => |
| 3452 | Effect.gen(function*() { |
| 3453 | const result1 = yield* Stream.zipWithArray( |
| 3454 | Stream.empty, |
| 3455 | Stream.make(1, 2, 3), |
| 3456 | (left, right) => { |
| 3457 | return [Array.of([left[0], right[0]] as const), [], []] |
| 3458 | } |
| 3459 | ).pipe(Stream.runCollect) |
| 3460 | |
| 3461 | const result2 = yield* Stream.zipWithArray( |
| 3462 | Stream.make(1, 2, 3), |
| 3463 | Stream.empty, |
| 3464 | (left, right) => { |
| 3465 | return [Array.of([left[0], right[0]] as const), [], []] |
| 3466 | } |
| 3467 | ).pipe(Stream.runCollect) |
| 3468 | |
| 3469 | assert.strictEqual(result1.length, 0) |
| 3470 | assert.strictEqual(result2.length, 0) |
| 3471 | })) |
| 3472 | |
| 3473 | it.effect("processes arrays of different sizes within streams", () => |
| 3474 | Effect.gen(function*() { |
| 3475 | const stream1 = Stream.fromArrays([1], [2, 3, 4], [5]) |
| 3476 | const stream2 = Stream.fromArrays([10, 20], [30], [40, 50]) |
| 3477 | const result = yield* Stream.zipWithArray(stream1, stream2, (left, right) => { |
| 3478 | const minLength = Math.min(left.length, right.length) |
| 3479 | const output = Array.makeBy(minLength, (i: number) => [left[i], right[i]] as const) |
| 3480 | return [output, left.slice(minLength), right.slice(minLength)] |
| 3481 | }).pipe(Stream.runCollect) |
| 3482 | |
| 3483 | assert.deepStrictEqual(result, [[1, 10], [2, 20], [3, 30], [4, 40], [5, 50]]) |
| 3484 | })) |
| 3485 | |
| 3486 | it.effect("custom array-level logic - take pairs", () => |
| 3487 | Effect.gen(function*() { |
| 3488 | const stream1 = Stream.make(1, 2, 3, 4) |
| 3489 | const stream2 = Stream.make(10, 20, 30, 40) |
| 3490 | const result = yield* Stream.zipWithArray(stream1, stream2, (left, right) => { |
| 3491 | const pairs = Math.min(Math.floor(left.length / 2), Math.floor(right.length / 2)) |
| 3492 | const output = Array.makeBy(pairs, (i: number) => { |
| 3493 | return [left[i * 2], left[i * 2 + 1], right[i * 2], right[i * 2 + 1]] as const |
| 3494 | }) |
| 3495 | |
| 3496 | const leftUsed = pairs * 2 |
| 3497 | const rightUsed = pairs * 2 |
| 3498 | const leftLeftover = left.slice(leftUsed) |
| 3499 | const rightLeftover = right.slice(rightUsed) |
| 3500 | |
| 3501 | return [output, leftLeftover, rightLeftover] |
| 3502 | }).pipe(Stream.runCollect) |
| 3503 | |
| 3504 | assert.deepStrictEqual(result, [[1, 2, 10, 20], [3, 4, 30, 40]]) |
| 3505 | })) |
| 3506 | |
| 3507 | it.effect("does not pull too much when one stream ends", () => |
| 3508 | Effect.gen(function*() { |
| 3509 | const left = Stream.fromArrays([1, 2], [3, 4], [5]).pipe( |
| 3510 | Stream.concat(Stream.fail("boom")) |
| 3511 | ) |
| 3512 | const right = Stream.fromArrays(["a", "b"], ["c"]) |
| 3513 | const result = yield* Stream.zipWithArray(left, right, (leftArr, rightArr) => { |
| 3514 | const minLength = Math.min(leftArr.length, rightArr.length) |
| 3515 | const output = Array.makeBy(minLength, (i: number) => [leftArr[i], rightArr[i]] as const) |
| 3516 | return [output, leftArr.slice(minLength), rightArr.slice(minLength)] |
| 3517 | }).pipe(Stream.runCollect) |
| 3518 | |
| 3519 | assert.deepStrictEqual(result, [[1, "a"], [2, "b"], [3, "c"]]) |
| 3520 | })) |
| 3521 | }) |
| 3522 | |
| 3523 | describe("zip", () => { |
| 3524 | it.effect("zips two streams into tuples", () => |
| 3525 | Effect.gen(function*() { |
| 3526 | const stream1 = Stream.make(1, 2, 3) |
| 3527 | const stream2 = Stream.make("a", "b", "c") |
| 3528 | const result = yield* Stream.zip(stream1, stream2).pipe(Stream.runCollect) |
| 3529 | |
| 3530 | assert.deepStrictEqual(result, [[1, "a"], [2, "b"], [3, "c"]]) |
| 3531 | })) |
| 3532 | |
| 3533 | it.effect("terminates when left stream ends first", () => |
| 3534 | Effect.gen(function*() { |
| 3535 | const stream1 = Stream.make(1, 2) |
| 3536 | const stream2 = Stream.make("a", "b", "c", "d") |
| 3537 | const result = yield* Stream.zip(stream1, stream2).pipe(Stream.runCollect) |
| 3538 | |
| 3539 | assert.deepStrictEqual(result, [[1, "a"], [2, "b"]]) |
| 3540 | })) |
| 3541 | |
| 3542 | it.effect("terminates when right stream ends first", () => |
| 3543 | Effect.gen(function*() { |
| 3544 | const stream1 = Stream.make(1, 2, 3, 4) |
| 3545 | const stream2 = Stream.make("a", "b") |
| 3546 | const result = yield* Stream.zip(stream1, stream2).pipe(Stream.runCollect) |
| 3547 | |
| 3548 | assert.deepStrictEqual(result, [[1, "a"], [2, "b"]]) |
| 3549 | })) |
| 3550 | |
| 3551 | it.effect("handles empty left stream", () => |
| 3552 | Effect.gen(function*() { |
| 3553 | const stream1 = Stream.empty |
| 3554 | const stream2 = Stream.make("a", "b", "c") |
| 3555 | const result = yield* Stream.zip(stream1, stream2).pipe(Stream.runCollect) |
| 3556 | |
| 3557 | assert.strictEqual(result.length, 0) |
| 3558 | })) |
| 3559 | |
| 3560 | it.effect("handles empty right stream", () => |
| 3561 | Effect.gen(function*() { |
| 3562 | const stream1 = Stream.make(1, 2, 3) |
| 3563 | const stream2 = Stream.empty |
| 3564 | const result = yield* Stream.zip(stream1, stream2).pipe(Stream.runCollect) |
| 3565 | |
| 3566 | assert.strictEqual(result.length, 0) |
| 3567 | })) |
| 3568 | |
| 3569 | it.effect("propagates errors from left stream", () => |
| 3570 | Effect.gen(function*() { |
| 3571 | const stream1 = Stream.make(1, 2).pipe(Stream.concat(Stream.fail("boom"))) |
| 3572 | const stream2 = Stream.make("a", "b", "c") |
| 3573 | const result = yield* Stream.zip(stream1, stream2).pipe(Stream.runCollect, Effect.exit) |
| 3574 | |
| 3575 | assertExitFailure(result, Cause.fail("boom")) |
| 3576 | })) |
| 3577 | |
| 3578 | it.effect("propagates errors from right stream", () => |
| 3579 | Effect.gen(function*() { |
| 3580 | const stream1 = Stream.make(1, 2, 3) |
| 3581 | const stream2 = Stream.make("a", "b").pipe(Stream.concat(Stream.fail("ouch"))) |
| 3582 | const result = yield* Stream.zip(stream1, stream2).pipe(Stream.runCollect, Effect.exit) |
| 3583 | |
| 3584 | assertExitFailure(result, Cause.fail("ouch")) |
| 3585 | })) |
| 3586 | |
| 3587 | it.effect("works with pipe syntax", () => |
| 3588 | Effect.gen(function*() { |
| 3589 | const stream1 = Stream.make(1, 2, 3) |
| 3590 | const stream2 = Stream.make("a", "b", "c") |
| 3591 | const result = yield* stream1.pipe(Stream.zip(stream2), Stream.runCollect) |
| 3592 | |
| 3593 | assert.deepStrictEqual(result, [[1, "a"], [2, "b"], [3, "c"]]) |
| 3594 | })) |
| 3595 | }) |
| 3596 | |
| 3597 | describe("zipLeft", () => { |
| 3598 | it.effect("keeps only left values", () => |
| 3599 | Effect.gen(function*() { |
| 3600 | const stream1 = Stream.make(1, 2, 3) |
| 3601 | const stream2 = Stream.make("a", "b", "c") |
| 3602 | const result = yield* Stream.zipLeft(stream1, stream2).pipe(Stream.runCollect) |
| 3603 | |
| 3604 | assert.deepStrictEqual(result, [1, 2, 3]) |
| 3605 | })) |
| 3606 | |
| 3607 | it.effect("terminates when left stream ends first", () => |
| 3608 | Effect.gen(function*() { |
| 3609 | const stream1 = Stream.make(1, 2) |
| 3610 | const stream2 = Stream.make("a", "b", "c", "d") |
| 3611 | const result = yield* Stream.zipLeft(stream1, stream2).pipe(Stream.runCollect) |
| 3612 | |
| 3613 | assert.deepStrictEqual(result, [1, 2]) |
| 3614 | })) |
| 3615 | |
| 3616 | it.effect("terminates when right stream ends first", () => |
| 3617 | Effect.gen(function*() { |
| 3618 | const stream1 = Stream.make(1, 2, 3, 4) |
| 3619 | const stream2 = Stream.make("a", "b") |
| 3620 | const result = yield* Stream.zipLeft(stream1, stream2).pipe(Stream.runCollect) |
| 3621 | |
| 3622 | assert.deepStrictEqual(result, [1, 2]) |
| 3623 | })) |
| 3624 | |
| 3625 | it.effect("handles empty left stream", () => |
| 3626 | Effect.gen(function*() { |
| 3627 | const stream1 = Stream.empty |
| 3628 | const stream2 = Stream.make("a", "b", "c") |
| 3629 | const result = yield* Stream.zipLeft(stream1, stream2).pipe(Stream.runCollect) |
| 3630 | |
| 3631 | assert.strictEqual(result.length, 0) |
| 3632 | })) |
| 3633 | |
| 3634 | it.effect("handles empty right stream", () => |
| 3635 | Effect.gen(function*() { |
| 3636 | const stream1 = Stream.make(1, 2, 3) |
| 3637 | const stream2 = Stream.empty |
| 3638 | const result = yield* Stream.zipLeft(stream1, stream2).pipe(Stream.runCollect) |
| 3639 | |
| 3640 | assert.strictEqual(result.length, 0) |
| 3641 | })) |
| 3642 | |
| 3643 | it.effect("propagates errors from left stream", () => |
| 3644 | Effect.gen(function*() { |
| 3645 | const stream1 = Stream.make(1, 2).pipe(Stream.concat(Stream.fail("boom"))) |
| 3646 | const stream2 = Stream.make("a", "b", "c") |
| 3647 | const result = yield* Stream.zipLeft(stream1, stream2).pipe(Stream.runCollect, Effect.exit) |
| 3648 | |
| 3649 | assertExitFailure(result, Cause.fail("boom")) |
| 3650 | })) |
| 3651 | |
| 3652 | it.effect("propagates errors from right stream", () => |
| 3653 | Effect.gen(function*() { |
| 3654 | const stream1 = Stream.make(1, 2, 3) |
| 3655 | const stream2 = Stream.make("a", "b").pipe(Stream.concat(Stream.fail("ouch"))) |
| 3656 | const result = yield* Stream.zipLeft(stream1, stream2).pipe(Stream.runCollect, Effect.exit) |
| 3657 | |
| 3658 | assertExitFailure(result, Cause.fail("ouch")) |
| 3659 | })) |
| 3660 | |
| 3661 | it.effect("works with pipe syntax", () => |
| 3662 | Effect.gen(function*() { |
| 3663 | const stream1 = Stream.make(1, 2, 3) |
| 3664 | const stream2 = Stream.make("a", "b", "c") |
| 3665 | const result = yield* stream1.pipe(Stream.zipLeft(stream2), Stream.runCollect) |
| 3666 | |
| 3667 | assert.deepStrictEqual(result, [1, 2, 3]) |
| 3668 | })) |
| 3669 | |
| 3670 | it.effect("consumes right stream elements", () => |
| 3671 | Effect.gen(function*() { |
| 3672 | let rightPulled = 0 |
| 3673 | const stream1 = Stream.make(1, 2, 3) |
| 3674 | const stream2 = Stream.make("a", "b", "c").pipe( |
| 3675 | Stream.tap(() => |
| 3676 | Effect.sync(() => { |
| 3677 | rightPulled++ |
| 3678 | }) |
| 3679 | ) |
| 3680 | ) |
| 3681 | const result = yield* Stream.zipLeft(stream1, stream2).pipe(Stream.runCollect) |
| 3682 | |
| 3683 | assert.deepStrictEqual(result, [1, 2, 3]) |
| 3684 | assert.strictEqual(rightPulled, 3) |
| 3685 | })) |
| 3686 | }) |
| 3687 | |
| 3688 | describe("zipRight", () => { |
| 3689 | it.effect("keeps only right values", () => |
| 3690 | Effect.gen(function*() { |
| 3691 | const stream1 = Stream.make(1, 2, 3) |
| 3692 | const stream2 = Stream.make("a", "b", "c") |
| 3693 | const result = yield* Stream.zipRight(stream1, stream2).pipe(Stream.runCollect) |
| 3694 | |
| 3695 | assert.deepStrictEqual(result, ["a", "b", "c"]) |
| 3696 | })) |
| 3697 | |
| 3698 | it.effect("terminates when left stream ends first", () => |
| 3699 | Effect.gen(function*() { |
| 3700 | const stream1 = Stream.make(1, 2) |
| 3701 | const stream2 = Stream.make("a", "b", "c", "d") |
| 3702 | const result = yield* Stream.zipRight(stream1, stream2).pipe(Stream.runCollect) |
| 3703 | |
| 3704 | assert.deepStrictEqual(result, ["a", "b"]) |
| 3705 | })) |
| 3706 | |
| 3707 | it.effect("terminates when right stream ends first", () => |
| 3708 | Effect.gen(function*() { |
| 3709 | const stream1 = Stream.make(1, 2, 3, 4) |
| 3710 | const stream2 = Stream.make("a", "b") |
| 3711 | const result = yield* Stream.zipRight(stream1, stream2).pipe(Stream.runCollect) |
| 3712 | |
| 3713 | assert.deepStrictEqual(result, ["a", "b"]) |
| 3714 | })) |
| 3715 | |
| 3716 | it.effect("handles empty left stream", () => |
| 3717 | Effect.gen(function*() { |
| 3718 | const stream1 = Stream.empty |
| 3719 | const stream2 = Stream.make("a", "b", "c") |
| 3720 | const result = yield* Stream.zipRight(stream1, stream2).pipe(Stream.runCollect) |
| 3721 | |
| 3722 | assert.strictEqual(result.length, 0) |
| 3723 | })) |
| 3724 | |
| 3725 | it.effect("handles empty right stream", () => |
| 3726 | Effect.gen(function*() { |
| 3727 | const stream1 = Stream.make(1, 2, 3) |
| 3728 | const stream2 = Stream.empty |
| 3729 | const result = yield* Stream.zipRight(stream1, stream2).pipe(Stream.runCollect) |
| 3730 | |
| 3731 | assert.strictEqual(result.length, 0) |
| 3732 | })) |
| 3733 | |
| 3734 | it.effect("propagates errors from left stream", () => |
| 3735 | Effect.gen(function*() { |
| 3736 | const stream1 = Stream.make(1, 2).pipe(Stream.concat(Stream.fail("boom"))) |
| 3737 | const stream2 = Stream.make("a", "b", "c") |
| 3738 | const result = yield* Stream.zipRight(stream1, stream2).pipe(Stream.runCollect, Effect.exit) |
| 3739 | |
| 3740 | assertExitFailure(result, Cause.fail("boom")) |
| 3741 | })) |
| 3742 | |
| 3743 | it.effect("propagates errors from right stream", () => |
| 3744 | Effect.gen(function*() { |
| 3745 | const stream1 = Stream.make(1, 2, 3) |
| 3746 | const stream2 = Stream.make("a", "b").pipe(Stream.concat(Stream.fail("ouch"))) |
| 3747 | const result = yield* Stream.zipRight(stream1, stream2).pipe(Stream.runCollect, Effect.exit) |
| 3748 | |
| 3749 | assertExitFailure(result, Cause.fail("ouch")) |
| 3750 | })) |
| 3751 | |
| 3752 | it.effect("works with pipe syntax", () => |
| 3753 | Effect.gen(function*() { |
| 3754 | const stream1 = Stream.make(1, 2, 3) |
| 3755 | const stream2 = Stream.make("a", "b", "c") |
| 3756 | const result = yield* stream1.pipe(Stream.zipRight(stream2), Stream.runCollect) |
| 3757 | |
| 3758 | assert.deepStrictEqual(result, ["a", "b", "c"]) |
| 3759 | })) |
| 3760 | |
| 3761 | it.effect("consumes left stream elements", () => |
| 3762 | Effect.gen(function*() { |
| 3763 | let leftPulled = 0 |
| 3764 | const stream1 = Stream.make(1, 2, 3).pipe( |
| 3765 | Stream.tap(() => |
| 3766 | Effect.sync(() => { |
| 3767 | leftPulled++ |
| 3768 | }) |
| 3769 | ) |
| 3770 | ) |
| 3771 | const stream2 = Stream.make("a", "b", "c") |
| 3772 | const result = yield* Stream.zipRight(stream1, stream2).pipe(Stream.runCollect) |
| 3773 | |
| 3774 | assert.deepStrictEqual(result, ["a", "b", "c"]) |
| 3775 | assert.strictEqual(leftPulled, 3) |
| 3776 | })) |
| 3777 | }) |
| 3778 | |
| 3779 | describe("zipFlatten", () => { |
| 3780 | it.effect("flattens tuples when zipping", () => |
| 3781 | Effect.gen(function*() { |
| 3782 | const stream1 = Stream.make([1, "a"] as const, [2, "b"] as const, [3, "c"] as const) |
| 3783 | const stream2 = Stream.make("x", "y", "z") |
| 3784 | const result = yield* Stream.zipFlatten(stream1, stream2).pipe(Stream.runCollect) |
| 3785 | |
| 3786 | assert.deepStrictEqual(result, [[1, "a", "x"], [2, "b", "y"], [3, "c", "z"]]) |
| 3787 | })) |
| 3788 | |
| 3789 | it.effect("works with single element tuples", () => |
| 3790 | Effect.gen(function*() { |
| 3791 | const stream1 = Stream.make([1] as const, [2] as const, [3] as const) |
| 3792 | const stream2 = Stream.make("a", "b", "c") |
| 3793 | const result = yield* Stream.zipFlatten(stream1, stream2).pipe(Stream.runCollect) |
| 3794 | |
| 3795 | assert.deepStrictEqual(result, [[1, "a"], [2, "b"], [3, "c"]]) |
| 3796 | })) |
| 3797 | |
| 3798 | it.effect("works with larger tuples", () => |
| 3799 | Effect.gen(function*() { |
| 3800 | const stream1 = Stream.make([1, 2, 3] as const, [4, 5, 6] as const) |
| 3801 | const stream2 = Stream.make("a", "b") |
| 3802 | const result = yield* Stream.zipFlatten(stream1, stream2).pipe(Stream.runCollect) |
| 3803 | |
| 3804 | assert.deepStrictEqual(result, [[1, 2, 3, "a"], [4, 5, 6, "b"]]) |
| 3805 | })) |
| 3806 | |
| 3807 | it.effect("terminates when left stream ends first", () => |
| 3808 | Effect.gen(function*() { |
| 3809 | const stream1 = Stream.make([1, "a"] as const, [2, "b"] as const) |
| 3810 | const stream2 = Stream.make("x", "y", "z", "w") |
| 3811 | const result = yield* Stream.zipFlatten(stream1, stream2).pipe(Stream.runCollect) |
| 3812 | |
| 3813 | assert.deepStrictEqual(result, [[1, "a", "x"], [2, "b", "y"]]) |
| 3814 | })) |
| 3815 | |
| 3816 | it.effect("terminates when right stream ends first", () => |
| 3817 | Effect.gen(function*() { |
| 3818 | const stream1 = Stream.make([1, "a"] as const, [2, "b"] as const, [3, "c"] as const, [4, "d"] as const) |
| 3819 | const stream2 = Stream.make("x", "y") |
| 3820 | const result = yield* Stream.zipFlatten(stream1, stream2).pipe(Stream.runCollect) |
| 3821 | |
| 3822 | assert.deepStrictEqual(result, [[1, "a", "x"], [2, "b", "y"]]) |
| 3823 | })) |
| 3824 | |
| 3825 | it.effect("handles empty left stream", () => |
| 3826 | Effect.gen(function*() { |
| 3827 | const stream1 = Stream.empty |
| 3828 | const stream2 = Stream.make("a", "b", "c") |
| 3829 | const result = yield* Stream.zipFlatten(stream1, stream2).pipe(Stream.runCollect) |
| 3830 | |
| 3831 | assert.strictEqual(result.length, 0) |
| 3832 | })) |
| 3833 | |
| 3834 | it.effect("handles empty right stream", () => |
| 3835 | Effect.gen(function*() { |
| 3836 | const stream1 = Stream.make([1, "a"] as const, [2, "b"] as const) |
| 3837 | const stream2 = Stream.empty |
| 3838 | const result = yield* Stream.zipFlatten(stream1, stream2).pipe(Stream.runCollect) |
| 3839 | |
| 3840 | assert.strictEqual(result.length, 0) |
| 3841 | })) |
| 3842 | |
| 3843 | it.effect("propagates errors from left stream", () => |
| 3844 | Effect.gen(function*() { |
| 3845 | const stream1 = Stream.make([1, "a"] as const, [2, "b"] as const).pipe(Stream.concat(Stream.fail("boom"))) |
| 3846 | const stream2 = Stream.make("x", "y", "z") |
| 3847 | const result = yield* Stream.zipFlatten(stream1, stream2).pipe(Stream.runCollect, Effect.exit) |
| 3848 | |
| 3849 | assertExitFailure(result, Cause.fail("boom")) |
| 3850 | })) |
| 3851 | |
| 3852 | it.effect("propagates errors from right stream", () => |
| 3853 | Effect.gen(function*() { |
| 3854 | const stream1 = Stream.make([1, "a"] as const, [2, "b"] as const, [3, "c"] as const) |
| 3855 | const stream2 = Stream.make("x", "y").pipe(Stream.concat(Stream.fail("ouch"))) |
| 3856 | const result = yield* Stream.zipFlatten(stream1, stream2).pipe(Stream.runCollect, Effect.exit) |
| 3857 | |
| 3858 | assertExitFailure(result, Cause.fail("ouch")) |
| 3859 | })) |
| 3860 | |
| 3861 | it.effect("works with pipe syntax", () => |
| 3862 | Effect.gen(function*() { |
| 3863 | const stream1 = Stream.make([1, "a"] as const, [2, "b"] as const, [3, "c"] as const) |
| 3864 | const stream2 = Stream.make("x", "y", "z") |
| 3865 | const result = yield* stream1.pipe(Stream.zipFlatten(stream2), Stream.runCollect) |
| 3866 | |
| 3867 | assert.deepStrictEqual(result, [[1, "a", "x"], [2, "b", "y"], [3, "c", "z"]]) |
| 3868 | })) |
| 3869 | }) |
| 3870 | |
| 3871 | describe("zipWithIndex", () => { |
| 3872 | it.effect("zips stream with indices starting at 0", () => |
| 3873 | Effect.gen(function*() { |
| 3874 | const stream = Stream.make("a", "b", "c", "d") |
| 3875 | const result = yield* Stream.zipWithIndex(stream).pipe(Stream.runCollect) |
| 3876 | |
| 3877 | assert.deepStrictEqual(result, [["a", 0], ["b", 1], ["c", 2], ["d", 3]]) |
| 3878 | })) |
| 3879 | |
| 3880 | it.effect("handles empty stream", () => |
| 3881 | Effect.gen(function*() { |
| 3882 | const stream = Stream.empty |
| 3883 | const result = yield* Stream.zipWithIndex(stream).pipe(Stream.runCollect) |
| 3884 | |
| 3885 | assert.strictEqual(result.length, 0) |
| 3886 | })) |
| 3887 | |
| 3888 | it.effect("handles single element stream", () => |
| 3889 | Effect.gen(function*() { |
| 3890 | const stream = Stream.make("a") |
| 3891 | const result = yield* Stream.zipWithIndex(stream).pipe(Stream.runCollect) |
| 3892 | |
| 3893 | assert.deepStrictEqual(result, [["a", 0]]) |
| 3894 | })) |
| 3895 | |
| 3896 | it.effect("preserves order", () => |
| 3897 | Effect.gen(function*() { |
| 3898 | const stream = Stream.make(5, 4, 3, 2, 1) |
| 3899 | const result = yield* Stream.zipWithIndex(stream).pipe(Stream.runCollect) |
| 3900 | |
| 3901 | assert.deepStrictEqual(result, [[5, 0], [4, 1], [3, 2], [2, 3], [1, 4]]) |
| 3902 | })) |
| 3903 | |
| 3904 | it.effect("works with numbers", () => |
| 3905 | Effect.gen(function*() { |
| 3906 | const stream = Stream.make(10, 20, 30) |
| 3907 | const result = yield* Stream.zipWithIndex(stream).pipe(Stream.runCollect) |
| 3908 | |
| 3909 | assert.deepStrictEqual(result, [[10, 0], [20, 1], [30, 2]]) |
| 3910 | })) |
| 3911 | |
| 3912 | it.effect("propagates errors", () => |
| 3913 | Effect.gen(function*() { |
| 3914 | const stream = Stream.make(1, 2, 3).pipe(Stream.concat(Stream.fail("boom"))) |
| 3915 | const result = yield* Stream.zipWithIndex(stream).pipe(Stream.runCollect, Effect.exit) |
| 3916 | |
| 3917 | assertExitFailure(result, Cause.fail("boom")) |
| 3918 | })) |
| 3919 | |
| 3920 | it.effect("works with pipe syntax", () => |
| 3921 | Effect.gen(function*() { |
| 3922 | const stream = Stream.make("x", "y", "z") |
| 3923 | const result = yield* stream.pipe(Stream.zipWithIndex, Stream.runCollect) |
| 3924 | |
| 3925 | assert.deepStrictEqual(result, [["x", 0], ["y", 1], ["z", 2]]) |
| 3926 | })) |
| 3927 | |
| 3928 | it.effect("index increments correctly for large streams", () => |
| 3929 | Effect.gen(function*() { |
| 3930 | const stream = Stream.range(0, 99) |
| 3931 | const result = yield* Stream.zipWithIndex(stream).pipe(Stream.runCollect) |
| 3932 | |
| 3933 | assert.strictEqual(result.length, 100) |
| 3934 | assert.deepStrictEqual(result[0], [0, 0]) |
| 3935 | assert.deepStrictEqual(result[99], [99, 99]) |
| 3936 | })) |
| 3937 | }) |
| 3938 | |
| 3939 | describe("zipLatest", () => { |
| 3940 | it.effect("combines streams with latest values", () => |
| 3941 | Effect.gen(function*() { |
| 3942 | const result = yield* Stream.zipLatest( |
| 3943 | Stream.make(1, 2, 3), |
| 3944 | Stream.make("a", "b", "c", "d") |
| 3945 | ).pipe(Stream.runCollect) |
| 3946 | |
| 3947 | // Both streams emit, latest values are paired |
| 3948 | assert.isTrue(result.length > 0) |
| 3949 | assert.isTrue(result.every((item) => Array.isArray(item) && item.length === 2)) |
| 3950 | })) |
| 3951 | |
| 3952 | it.effect("waits for both streams to emit before producing output", () => |
| 3953 | Effect.gen(function*() { |
| 3954 | const queue1 = yield* Queue.unbounded<number>() |
| 3955 | const queue2 = yield* Queue.unbounded<string>() |
| 3956 | |
| 3957 | const fiber = yield* Effect.forkScoped( |
| 3958 | Stream.zipLatest( |
| 3959 | Stream.fromQueue(queue1), |
| 3960 | Stream.fromQueue(queue2) |
| 3961 | ).pipe(Stream.take(3), Stream.runCollect) |
| 3962 | ) |
| 3963 | |
| 3964 | yield* Queue.offer(queue1, 1) |
| 3965 | yield* Queue.offer(queue2, "a") |
| 3966 | yield* Queue.offer(queue1, 2) |
| 3967 | yield* Queue.offer(queue2, "b") |
| 3968 | yield* Queue.offer(queue1, 3) |
| 3969 | |
| 3970 | const result = yield* Fiber.join(fiber) |
| 3971 | |
| 3972 | assert.isTrue(result.length > 0) |
| 3973 | })) |
| 3974 | |
| 3975 | it.effect("propagates errors from left stream", () => |
| 3976 | Effect.gen(function*() { |
| 3977 | const result = yield* Stream.zipLatest( |
| 3978 | Stream.make(1, 2).pipe(Stream.concat(Stream.fail("boom"))), |
| 3979 | Stream.make("a", "b", "c") |
| 3980 | ).pipe(Stream.runCollect, Effect.exit) |
| 3981 | |
| 3982 | assertExitFailure(result, Cause.fail("boom")) |
| 3983 | })) |
| 3984 | |
| 3985 | it.effect("propagates errors from right stream", () => |
| 3986 | Effect.gen(function*() { |
| 3987 | const result = yield* Stream.zipLatest( |
| 3988 | Stream.make(1, 2, 3), |
| 3989 | Stream.make("a", "b").pipe(Stream.concat(Stream.fail("ouch"))) |
| 3990 | ).pipe(Stream.runCollect, Effect.exit) |
| 3991 | |
| 3992 | assertExitFailure(result, Cause.fail("ouch")) |
| 3993 | })) |
| 3994 | |
| 3995 | it.effect("terminates when left stream ends", () => |
| 3996 | Effect.gen(function*() { |
| 3997 | const result = yield* Stream.zipLatest( |
| 3998 | Stream.make(1, 2), |
| 3999 | Stream.make("a", "b", "c", "d", "e") |
| 4000 | ).pipe(Stream.runCollect) |
| 4001 | |
| 4002 | // Should terminate when left stream (1, 2) ends |
| 4003 | assert.isTrue(result.length > 0) |
| 4004 | })) |
| 4005 | |
| 4006 | it.effect("terminates when right stream ends", () => |
| 4007 | Effect.gen(function*() { |
| 4008 | const result = yield* Stream.zipLatest( |
| 4009 | Stream.make(1, 2, 3, 4, 5), |
| 4010 | Stream.make("a", "b") |
| 4011 | ).pipe(Stream.runCollect) |
| 4012 | |
| 4013 | // Should terminate when right stream ("a", "b") ends |
| 4014 | assert.isTrue(result.length > 0) |
| 4015 | })) |
| 4016 | |
| 4017 | it.effect("works with pipe syntax", () => |
| 4018 | Effect.gen(function*() { |
| 4019 | const result = yield* Stream.make(1, 2, 3).pipe( |
| 4020 | Stream.zipLatest(Stream.make("a", "b", "c")), |
| 4021 | Stream.runCollect |
| 4022 | ) |
| 4023 | |
| 4024 | assert.isTrue(result.length > 0) |
| 4025 | })) |
| 4026 | |
| 4027 | it.effect("basic synchronous example", () => |
| 4028 | Effect.gen(function*() { |
| 4029 | const result = yield* Stream.zipLatest( |
| 4030 | Stream.make(1, 2, 3), |
| 4031 | Stream.make("a", "b", "c") |
| 4032 | ).pipe(Stream.runCollect) |
| 4033 | |
| 4034 | // Both streams emit synchronously, latest values are paired |
| 4035 | assert.isTrue(result.length > 0) |
| 4036 | assert.isTrue(result.every((item) => Array.isArray(item) && item.length === 2)) |
| 4037 | })) |
| 4038 | }) |
| 4039 | |
| 4040 | describe("zipLatestWith", () => { |
| 4041 | it.effect("transforms combined values", () => |
| 4042 | Effect.gen(function*() { |
| 4043 | const result = yield* Stream.zipLatestWith( |
| 4044 | Stream.make(1, 2, 3), |
| 4045 | Stream.make(10, 20, 30), |
| 4046 | (n, m) => n * m |
| 4047 | ).pipe(Stream.runCollect) |
| 4048 | |
| 4049 | assert.isTrue(result.length > 0) |
| 4050 | assert.isTrue(result.every((item) => typeof item === "number")) |
| 4051 | })) |
| 4052 | |
| 4053 | it.effect("combines with custom function", () => |
| 4054 | Effect.gen(function*() { |
| 4055 | const result = yield* Stream.zipLatestWith( |
| 4056 | Stream.make(1, 2, 3), |
| 4057 | Stream.make("a", "b", "c"), |
| 4058 | (n, s) => `${n}-${s}` |
| 4059 | ).pipe(Stream.runCollect) |
| 4060 | |
| 4061 | assert.isTrue(result.length > 0) |
| 4062 | assert.isTrue(result.every((item) => typeof item === "string" && item.includes("-"))) |
| 4063 | })) |
| 4064 | |
| 4065 | it.effect("propagates errors from left stream", () => |
| 4066 | Effect.gen(function*() { |
| 4067 | const result = yield* Stream.zipLatestWith( |
| 4068 | Stream.make(1, 2).pipe(Stream.concat(Stream.fail("boom"))), |
| 4069 | Stream.make("a", "b", "c"), |
| 4070 | (n, s) => `${n}-${s}` |
| 4071 | ).pipe(Stream.runCollect, Effect.exit) |
| 4072 | |
| 4073 | assertExitFailure(result, Cause.fail("boom")) |
| 4074 | })) |
| 4075 | |
| 4076 | it.effect("propagates errors from right stream", () => |
| 4077 | Effect.gen(function*() { |
| 4078 | const result = yield* Stream.zipLatestWith( |
| 4079 | Stream.make(1, 2, 3), |
| 4080 | Stream.make("a", "b").pipe(Stream.concat(Stream.fail("ouch"))), |
| 4081 | (n, s) => `${n}-${s}` |
| 4082 | ).pipe(Stream.runCollect, Effect.exit) |
| 4083 | |
| 4084 | assertExitFailure(result, Cause.fail("ouch")) |
| 4085 | })) |
| 4086 | |
| 4087 | it.effect("terminates when left stream ends", () => |
| 4088 | Effect.gen(function*() { |
| 4089 | const result = yield* Stream.zipLatestWith( |
| 4090 | Stream.make(1, 2), |
| 4091 | Stream.make(10, 20, 30, 40), |
| 4092 | (n, m) => n + m |
| 4093 | ).pipe(Stream.runCollect) |
| 4094 | |
| 4095 | assert.isTrue(result.length > 0) |
| 4096 | })) |
| 4097 | |
| 4098 | it.effect("terminates when right stream ends", () => |
| 4099 | Effect.gen(function*() { |
| 4100 | const result = yield* Stream.zipLatestWith( |
| 4101 | Stream.make(1, 2, 3, 4), |
| 4102 | Stream.make(10, 20), |
| 4103 | (n, m) => n + m |
| 4104 | ).pipe(Stream.runCollect) |
| 4105 | |
| 4106 | assert.isTrue(result.length > 0) |
| 4107 | })) |
| 4108 | |
| 4109 | it.effect("works with pipe syntax", () => |
| 4110 | Effect.gen(function*() { |
| 4111 | const result = yield* Stream.make(1, 2, 3).pipe( |
| 4112 | Stream.zipLatestWith( |
| 4113 | Stream.make(10, 20, 30), |
| 4114 | (n, m) => n + m |
| 4115 | ), |
| 4116 | Stream.runCollect |
| 4117 | ) |
| 4118 | |
| 4119 | assert.isTrue(result.length > 0) |
| 4120 | })) |
| 4121 | |
| 4122 | it.effect("basic synchronous example", () => |
| 4123 | Effect.gen(function*() { |
| 4124 | const result = yield* Stream.zipLatestWith( |
| 4125 | Stream.make(1, 2, 3), |
| 4126 | Stream.make(10, 20, 30), |
| 4127 | (a, b) => a + b |
| 4128 | ).pipe(Stream.runCollect) |
| 4129 | |
| 4130 | assert.isTrue(result.length > 0) |
| 4131 | assert.isTrue(result.every((item) => typeof item === "number")) |
| 4132 | })) |
| 4133 | |
| 4134 | it.effect("string concatenation example", () => |
| 4135 | Effect.gen(function*() { |
| 4136 | const result = yield* Stream.zipLatestWith( |
| 4137 | Stream.make("Alice", "Bob", "Charlie"), |
| 4138 | Stream.make("Smith", "Jones"), |
| 4139 | (first, last) => `${first} ${last}` |
| 4140 | ).pipe(Stream.runCollect) |
| 4141 | |
| 4142 | assert.isTrue(result.length > 0) |
| 4143 | assert.isTrue(result.every((item) => typeof item === "string" && item.includes(" "))) |
| 4144 | })) |
| 4145 | }) |
| 4146 | }) |
| 4147 | |
| 4148 | describe("tapSink", () => { |
| 4149 | it.effect("sink that is done after stream", () => |
| 4150 | Effect.gen(function*() { |
| 4151 | const ref = yield* Ref.make(0) |
| 4152 | const sink = Sink.forEach((i: number) => Ref.update(ref, (n) => i + n)) |
| 4153 | const result = yield* pipe( |
| 4154 | Stream.make(1, 1, 2, 3, 5, 8), |
| 4155 | Stream.tapSink(sink), |
| 4156 | Stream.runCollect |
| 4157 | ) |
| 4158 | const sum = yield* (Ref.get(ref)) |
| 4159 | strictEqual(sum, 20) |
| 4160 | deepStrictEqual(result, [1, 1, 2, 3, 5, 8]) |
| 4161 | })) |
| 4162 | |
| 4163 | it.effect("sink that is done before stream", () => |
| 4164 | Effect.gen(function*() { |
| 4165 | const ref = yield* Ref.make(0) |
| 4166 | const sink = pipe( |
| 4167 | Sink.take<number>(3), |
| 4168 | Sink.map(Array.reduce(0, (x, y) => x + y)), |
| 4169 | Sink.mapEffect((i) => Ref.update(ref, (n) => n + i)) |
| 4170 | ) |
| 4171 | const result = yield* pipe( |
| 4172 | Stream.make(1, 1, 2, 3, 5, 8), |
| 4173 | Stream.rechunk(1), |
| 4174 | Stream.tapSink(sink), |
| 4175 | Stream.runCollect |
| 4176 | ) |
| 4177 | const sum = yield* (Ref.get(ref)) |
| 4178 | strictEqual(sum, 4) |
| 4179 | deepStrictEqual(result, [1, 1, 2, 3, 5, 8]) |
| 4180 | })) |
| 4181 | |
| 4182 | it.effect("sink that fails before stream", () => |
| 4183 | Effect.gen(function*() { |
| 4184 | const sink = Sink.fail("error") |
| 4185 | const result = yield* pipe( |
| 4186 | Stream.make(1, 2, 3), |
| 4187 | Stream.tapSink(sink), |
| 4188 | Stream.runCollect, |
| 4189 | Effect.flip |
| 4190 | ) |
| 4191 | strictEqual(result, "error") |
| 4192 | })) |
| 4193 | |
| 4194 | it.effect("does not read ahead", () => |
| 4195 | Effect.gen(function*() { |
| 4196 | const ref = yield* Ref.make(0) |
| 4197 | const sink = Sink.forEach((i: number) => Ref.update(ref, (n) => i + n)) |
| 4198 | yield* pipe( |
| 4199 | Stream.make(1, 2, 3, 4, 5), |
| 4200 | Stream.rechunk(1), |
| 4201 | Stream.forever, |
| 4202 | Stream.tapSink(sink), |
| 4203 | Stream.take(3), |
| 4204 | Stream.runDrain |
| 4205 | ) |
| 4206 | const result = yield* Ref.get(ref) |
| 4207 | strictEqual(result, 6) |
| 4208 | })) |
| 4209 | }) |
| 4210 | |
| 4211 | describe("dropping", () => { |
| 4212 | it.effect("drop - simple example", () => |
| 4213 | Effect.gen(function*() { |
| 4214 | const n = 2 |
| 4215 | const stream = Stream.make(1, 2, 3, 4, 5) |
| 4216 | const { result1, result2 } = yield* (Effect.all({ |
| 4217 | result1: pipe(stream, Stream.drop(n), Stream.runCollect), |
| 4218 | result2: pipe(stream, Stream.runCollect, Effect.map(Array.drop(n))) |
| 4219 | })) |
| 4220 | deepStrictEqual(result1, result2) |
| 4221 | })) |
| 4222 | |
| 4223 | it.effect("drop - normalizes the count independently of upstream chunking", () => |
| 4224 | Effect.gen(function*() { |
| 4225 | const counts = [Number.NaN, 0.5, 1.9, 2.9] |
| 4226 | const results = yield* Effect.forEach([ |
| 4227 | Stream.make(1, 2, 3), |
| 4228 | Stream.fromArrays([1], [2], [3]) |
| 4229 | ], (stream) => |
| 4230 | Effect.forEach(counts, (n) => |
| 4231 | stream.pipe( |
| 4232 | Stream.drop(n), |
| 4233 | Stream.runCollect |
| 4234 | ))) |
| 4235 | assert.deepStrictEqual(results, [ |
| 4236 | [[1, 2, 3], [1, 2, 3], [2, 3], [3]], |
| 4237 | [[1, 2, 3], [1, 2, 3], [2, 3], [3]] |
| 4238 | ]) |
| 4239 | })) |
| 4240 | |
| 4241 | it.effect("drop - does not swallow errors", () => |
| 4242 | Effect.gen(function*() { |
| 4243 | const result = yield* pipe( |
| 4244 | Stream.fail("Ouch"), |
| 4245 | Stream.concat(Stream.make(1)), |
| 4246 | Stream.drop(1), |
| 4247 | Stream.runDrain, |
| 4248 | Effect.result |
| 4249 | ) |
| 4250 | assertFailure(result, "Ouch") |
| 4251 | })) |
| 4252 | |
| 4253 | it.effect("dropRight - simple example", () => |
| 4254 | Effect.gen(function*() { |
| 4255 | const n = 2 |
| 4256 | const stream = Stream.make(1, 2, 3, 4, 5) |
| 4257 | const { result1, result2 } = yield* (Effect.all({ |
| 4258 | result1: pipe(stream, Stream.dropRight(n), Stream.runCollect), |
| 4259 | result2: pipe(stream, Stream.runCollect, Effect.map(Array.dropRight(n))) |
| 4260 | })) |
| 4261 | deepStrictEqual(result1, result2) |
| 4262 | })) |
| 4263 | |
| 4264 | it.effect("dropRight - normalizes the element count", () => |
| 4265 | Effect.gen(function*() { |
| 4266 | const results = yield* Effect.forEach([Number.NaN, 0.5, 1.9, 2.9], (n) => |
| 4267 | Stream.make(1, 2, 3).pipe( |
| 4268 | Stream.dropRight(n), |
| 4269 | Stream.runCollect |
| 4270 | )) |
| 4271 | assert.deepStrictEqual(results, [[1, 2, 3], [1, 2, 3], [1, 2], [1]]) |
| 4272 | })) |
| 4273 | |
| 4274 | it.effect("dropRight - does not swallow errors", () => |
| 4275 | Effect.gen(function*() { |
| 4276 | const result = yield* pipe( |
| 4277 | Stream.make(1), |
| 4278 | Stream.concat(Stream.fail("Ouch")), |
| 4279 | Stream.dropRight(1), |
| 4280 | Stream.runDrain, |
| 4281 | Effect.result |
| 4282 | ) |
| 4283 | assertFailure(result, "Ouch") |
| 4284 | })) |
| 4285 | |
| 4286 | it.effect("dropUntil", () => |
| 4287 | Effect.gen(function*() { |
| 4288 | const stream = Stream.make(1, 2, 3, 4, 5) |
| 4289 | const f = (n: number) => n < 3 |
| 4290 | const { result1, result2 } = yield* (Effect.all({ |
| 4291 | result1: pipe(stream, Stream.dropUntil(f), Stream.runCollect), |
| 4292 | result2: pipe( |
| 4293 | Stream.runCollect(stream), |
| 4294 | Effect.map((chunk) => pipe(chunk, Array.dropWhile((n) => !f(n)), Array.drop(1))) |
| 4295 | ) |
| 4296 | })) |
| 4297 | deepStrictEqual(result1, result2) |
| 4298 | })) |
| 4299 | |
| 4300 | it.effect("dropWhile", () => |
| 4301 | Effect.gen(function*() { |
| 4302 | const stream = Stream.make(1, 2, 3, 4, 5) |
| 4303 | const f = (n: number) => n < 3 |
| 4304 | const { result1, result2 } = yield* (Effect.all({ |
| 4305 | result1: pipe(stream, Stream.dropWhile(f), Stream.runCollect), |
| 4306 | result2: pipe(stream, Stream.runCollect, Effect.map(Array.dropWhile(f))) |
| 4307 | })) |
| 4308 | deepStrictEqual(result1, result2) |
| 4309 | })) |
| 4310 | |
| 4311 | it.effect("dropWhileFilter", () => |
| 4312 | Effect.gen(function*() { |
| 4313 | const result = yield* Stream.make(1, 2, 3, 4, 5).pipe( |
| 4314 | Stream.dropWhileFilter((n) => n < 3 ? Result.succeed(n) : Result.failVoid), |
| 4315 | Stream.runCollect |
| 4316 | ) |
| 4317 | deepStrictEqual(result, [3, 4, 5]) |
| 4318 | })) |
| 4319 | |
| 4320 | it.effect("dropWhile - short circuits", () => |
| 4321 | Effect.gen(function*() { |
| 4322 | const result = yield* pipe( |
| 4323 | Stream.make(1), |
| 4324 | Stream.concat(Stream.fail("Ouch")), |
| 4325 | Stream.take(1), |
| 4326 | Stream.dropWhile(constTrue), |
| 4327 | Stream.runDrain, |
| 4328 | Effect.result |
| 4329 | ) |
| 4330 | assertSuccess(result, void 0) |
| 4331 | })) |
| 4332 | }) |
| 4333 | |
| 4334 | describe("haltWhen", () => { |
| 4335 | it.effect("halts after the current element in the documentation example", () => |
| 4336 | Effect.gen(function*() { |
| 4337 | const halt = yield* Deferred.make<void>() |
| 4338 | const values = yield* Stream.fromArray([1, 2, 3]).pipe( |
| 4339 | Stream.tap((value) => value === 2 ? Deferred.succeed(halt, void 0) : Effect.void), |
| 4340 | Stream.haltWhen(Deferred.await(halt)), |
| 4341 | Stream.runCollect |
| 4342 | ) |
| 4343 | assert.deepStrictEqual(values, [1, 2]) |
| 4344 | })) |
| 4345 | |
| 4346 | it.effect("halts a synchronous upstream before the next chunk", () => |
| 4347 | Effect.gen(function*() { |
| 4348 | const halt = yield* Deferred.make<void>() |
| 4349 | const values = yield* Stream.fromArrays([1], [2], [3], [4]).pipe( |
| 4350 | Stream.tap((value) => value === 2 ? Deferred.succeed(halt, void 0) : Effect.void), |
| 4351 | Stream.haltWhen(Deferred.await(halt)), |
| 4352 | Stream.runCollect |
| 4353 | ) |
| 4354 | assert.deepStrictEqual(values, [1, 2]) |
| 4355 | })) |
| 4356 | |
| 4357 | it.effect("halts after the current element", () => |
| 4358 | Effect.gen(function*() { |
| 4359 | const ref = yield* Ref.make(false) |
| 4360 | const latch = yield* Deferred.make<void>() |
| 4361 | const halt = yield* Deferred.make<void>() |
| 4362 | yield* pipe( |
| 4363 | Deferred.await(latch), |
| 4364 | Effect.onInterrupt(() => Ref.set(ref, true)), |
| 4365 | Stream.fromEffect, |
| 4366 | Stream.haltWhen(Deferred.await(halt)), |
| 4367 | Stream.runDrain, |
| 4368 | Effect.forkChild |
| 4369 | ) |
| 4370 | yield* Deferred.succeed(halt, void 0) |
| 4371 | yield* Deferred.succeed(latch, void 0) |
| 4372 | const result = yield* Ref.get(ref) |
| 4373 | assert.strictEqual(result, false) |
| 4374 | })) |
| 4375 | |
| 4376 | it.effect("propagates errors", () => |
| 4377 | Effect.gen(function*() { |
| 4378 | const halt = yield* Deferred.make<void, string>() |
| 4379 | yield* Deferred.fail(halt, "fail") |
| 4380 | const result = yield* pipe( |
| 4381 | Stream.make(0), |
| 4382 | Stream.forever, |
| 4383 | Stream.haltWhen(Deferred.await(halt)), |
| 4384 | Stream.runDrain, |
| 4385 | Effect.flip |
| 4386 | ) |
| 4387 | assert.strictEqual(result, "fail") |
| 4388 | })) |
| 4389 | }) |
| 4390 | |
| 4391 | describe("intersperse", () => { |
| 4392 | it.effect("intersperse - several values", () => |
| 4393 | Effect.gen(function*() { |
| 4394 | const result = yield* pipe( |
| 4395 | Stream.make(1, 2, 3, 4), |
| 4396 | Stream.map(String), |
| 4397 | Stream.intersperse("."), |
| 4398 | Stream.runCollect |
| 4399 | ) |
| 4400 | deepStrictEqual(result, ["1", ".", "2", ".", "3", ".", "4"]) |
| 4401 | })) |
| 4402 | |
| 4403 | it.effect("intersperseAffixes - several values", () => |
| 4404 | Effect.gen(function*() { |
| 4405 | const result = yield* pipe( |
| 4406 | Stream.make(1, 2, 3, 4), |
| 4407 | Stream.map(String), |
| 4408 | Stream.intersperseAffixes({ start: "[", middle: ".", end: "]" }), |
| 4409 | Stream.runCollect |
| 4410 | ) |
| 4411 | deepStrictEqual(result, ["[", "1", ".", "2", ".", "3", ".", "4", "]"]) |
| 4412 | })) |
| 4413 | |
| 4414 | it.effect("intersperse - single value", () => |
| 4415 | Effect.gen(function*() { |
| 4416 | const result = yield* pipe( |
| 4417 | Stream.make(1), |
| 4418 | Stream.map(String), |
| 4419 | Stream.intersperse("."), |
| 4420 | Stream.runCollect |
| 4421 | ) |
| 4422 | deepStrictEqual(result, ["1"]) |
| 4423 | })) |
| 4424 | |
| 4425 | it.effect("intersperseAffixes - single value", () => |
| 4426 | Effect.gen(function*() { |
| 4427 | const result = yield* pipe( |
| 4428 | Stream.make(1), |
| 4429 | Stream.map(String), |
| 4430 | Stream.intersperseAffixes({ start: "[", middle: ".", end: "]" }), |
| 4431 | Stream.runCollect |
| 4432 | ) |
| 4433 | deepStrictEqual(result, ["[", "1", "]"]) |
| 4434 | })) |
| 4435 | |
| 4436 | it.effect("intersperse - several from repeat effect (ZIO #3729)", () => |
| 4437 | Effect.gen(function*() { |
| 4438 | const result = yield* pipe( |
| 4439 | Stream.fromEffectRepeat(Effect.succeed(42)), |
| 4440 | Stream.map(String), |
| 4441 | Stream.take(4), |
| 4442 | Stream.intersperse("."), |
| 4443 | Stream.runCollect |
| 4444 | ) |
| 4445 | deepStrictEqual(result, ["42", ".", "42", ".", "42", ".", "42"]) |
| 4446 | })) |
| 4447 | |
| 4448 | it.effect("intersperse - several from repeat effect chunk single element (ZIO #3729)", () => |
| 4449 | Effect.gen(function*() { |
| 4450 | const result = yield* pipe( |
| 4451 | Stream.fromIterableEffectRepeat(Effect.succeed(Array.of(42))), |
| 4452 | Stream.map(String), |
| 4453 | Stream.intersperse("."), |
| 4454 | Stream.take(4), |
| 4455 | Stream.runCollect |
| 4456 | ) |
| 4457 | deepStrictEqual(result, ["42", ".", "42", "."]) |
| 4458 | })) |
| 4459 | }) |
| 4460 | |
| 4461 | describe("interleave", () => { |
| 4462 | it.effect("interleave", () => |
| 4463 | Effect.gen(function*() { |
| 4464 | const stream1 = Stream.make(2, 3) |
| 4465 | const stream2 = Stream.make(5, 6, 7) |
| 4466 | const result = yield* pipe( |
| 4467 | stream1, |
| 4468 | Stream.interleave(stream2), |
| 4469 | Stream.runCollect |
| 4470 | ) |
| 4471 | deepStrictEqual(result, [2, 5, 3, 6, 7]) |
| 4472 | })) |
| 4473 | |
| 4474 | it.effect("interleaveWith", () => |
| 4475 | Effect.gen(function*() { |
| 4476 | const interleave = ( |
| 4477 | bools: ReadonlyArray<boolean>, |
| 4478 | numbers1: ReadonlyArray<number>, |
| 4479 | numbers2: ReadonlyArray<number> |
| 4480 | ): ReadonlyArray<number> => |
| 4481 | pipe( |
| 4482 | Array.head(bools), |
| 4483 | Option.map((head) => { |
| 4484 | if (head) { |
| 4485 | if (Array.isReadonlyArrayNonEmpty(numbers1)) { |
| 4486 | const head = pipe(numbers1, Array.getUnsafe(0)) |
| 4487 | const tail = pipe(numbers1, Array.drop(1)) |
| 4488 | return pipe( |
| 4489 | interleave(pipe(bools, Array.drop(1)), tail, numbers2), |
| 4490 | Array.prepend(head) |
| 4491 | ) |
| 4492 | } |
| 4493 | if (Array.isReadonlyArrayNonEmpty(numbers2)) { |
| 4494 | return interleave(pipe(bools, Array.drop(1)), Array.empty<number>(), numbers2) |
| 4495 | } |
| 4496 | return Array.empty<number>() |
| 4497 | } |
| 4498 | if (Array.isReadonlyArrayNonEmpty(numbers2)) { |
| 4499 | const head = pipe(numbers2, Array.getUnsafe(0)) |
| 4500 | const tail = pipe(numbers2, Array.drop(1)) |
| 4501 | return pipe( |
| 4502 | interleave(pipe(bools, Array.drop(1)), numbers1, tail), |
| 4503 | Array.prepend(head) |
| 4504 | ) |
| 4505 | } |
| 4506 | if (Array.isReadonlyArrayNonEmpty(numbers1)) { |
| 4507 | return interleave(pipe(bools, Array.drop(1)), numbers1, Array.empty<number>()) |
| 4508 | } |
| 4509 | return Array.empty<number>() |
| 4510 | }), |
| 4511 | Option.getOrElse(() => Array.empty<number>()) |
| 4512 | ) |
| 4513 | const boolStream = Stream.make(true, true, false, true, false) |
| 4514 | const stream1 = Stream.make(1, 2, 3, 4, 5) |
| 4515 | const stream2 = Stream.make(4, 5, 6, 7, 8) |
| 4516 | const interleavedStream = yield* pipe( |
| 4517 | stream1, |
| 4518 | Stream.interleaveWith(stream2, boolStream), |
| 4519 | Stream.runCollect |
| 4520 | ) |
| 4521 | const bools = yield* (Stream.runCollect(boolStream)) |
| 4522 | const numbers1 = yield* (Stream.runCollect(stream1)) |
| 4523 | const numbers2 = yield* (Stream.runCollect(stream2)) |
| 4524 | const interleavedChunks = interleave(bools, numbers1, numbers2) |
| 4525 | deepStrictEqual(interleavedStream, interleavedChunks) |
| 4526 | })) |
| 4527 | }) |
| 4528 | |
| 4529 | describe("merge", () => { |
| 4530 | it.effect("data-first with options", () => |
| 4531 | Effect.gen(function*() { |
| 4532 | const result = yield* Stream.runCollect( |
| 4533 | Stream.merge(Stream.make(1), Stream.never, { haltStrategy: "left" }) |
| 4534 | ) |
| 4535 | deepStrictEqual(result, [1]) |
| 4536 | })) |
| 4537 | |
| 4538 | it.effect("data-last with options", () => |
| 4539 | Effect.gen(function*() { |
| 4540 | const result = yield* pipe( |
| 4541 | Stream.make(1), |
| 4542 | Stream.merge(Stream.never, { haltStrategy: "left" }), |
| 4543 | Stream.runCollect |
| 4544 | ) |
| 4545 | deepStrictEqual(result, [1]) |
| 4546 | })) |
| 4547 | }) |
| 4548 | |
| 4549 | describe("partition", () => { |
| 4550 | it.effect("defaults to a capacity of 16", () => |
| 4551 | Effect.gen(function*() { |
| 4552 | let pulled = 0 |
| 4553 | yield* Stream.range(0, 31).pipe( |
| 4554 | Stream.rechunk(1), |
| 4555 | Stream.tap(() => |
| 4556 | Effect.sync(() => { |
| 4557 | pulled++ |
| 4558 | }) |
| 4559 | ), |
| 4560 | Stream.partition(Result.succeed) |
| 4561 | ) |
| 4562 | yield* TestClock.adjust(0) |
| 4563 | // Sixteen elements are buffered; the next offer is blocked. |
| 4564 | assert.strictEqual(pulled, 17) |
| 4565 | }).pipe(Effect.scoped)) |
| 4566 | |
| 4567 | it.effect("values", () => |
| 4568 | Effect.gen(function*() { |
| 4569 | const { result1, result2 } = yield* pipe( |
| 4570 | Stream.range(0, 5), |
| 4571 | Stream.partition((n) => n % 2 === 0 ? Result.succeed(n) : Result.fail(n)), |
| 4572 | Effect.flatMap(([evens, odds]) => |
| 4573 | Effect.all({ |
| 4574 | result1: Stream.runCollect(evens), |
| 4575 | result2: Stream.runCollect(odds) |
| 4576 | }) |
| 4577 | ), |
| 4578 | Effect.scoped |
| 4579 | ) |
| 4580 | deepStrictEqual(result1, [0, 2, 4]) |
| 4581 | deepStrictEqual(result2, [1, 3, 5]) |
| 4582 | })) |
| 4583 | |
| 4584 | it.effect("errors", () => |
| 4585 | Effect.gen(function*() { |
| 4586 | const { result1, result2 } = yield* pipe( |
| 4587 | Stream.make(0), |
| 4588 | Stream.concat(Stream.fail("boom")), |
| 4589 | Stream.partition((n) => n % 2 === 0 ? Result.succeed(n) : Result.fail(n)), |
| 4590 | Effect.flatMap(([evens, odds]) => |
| 4591 | Effect.all({ |
| 4592 | result1: Effect.flip(Stream.runCollect(evens)), |
| 4593 | result2: Effect.flip(Stream.runCollect(odds)) |
| 4594 | }) |
| 4595 | ), |
| 4596 | Effect.scoped |
| 4597 | ) |
| 4598 | assert.strictEqual(result1, "boom") |
| 4599 | assert.strictEqual(result2, "boom") |
| 4600 | })) |
| 4601 | |
| 4602 | it.effect("backpressure", () => |
| 4603 | Effect.gen(function*() { |
| 4604 | const { result1, result2, result3 } = yield* pipe( |
| 4605 | Stream.range(0, 5), |
| 4606 | Stream.partition((n) => n % 2 === 0 ? Result.succeed(n) : Result.fail(n), { capacity: 1 }), |
| 4607 | Effect.flatMap(([evens, odds]) => |
| 4608 | Effect.gen(function*() { |
| 4609 | const ref = yield* Ref.make(Array.empty<number>()) |
| 4610 | const latch = yield* Deferred.make<void>() |
| 4611 | const fiber = yield* pipe( |
| 4612 | evens, |
| 4613 | Stream.tap((n) => |
| 4614 | pipe( |
| 4615 | Ref.update(ref, Array.prepend(n)), |
| 4616 | Effect.andThen( |
| 4617 | pipe( |
| 4618 | Deferred.succeed(latch, void 0), |
| 4619 | Effect.when(Effect.sync(() => n === 2)) |
| 4620 | ) |
| 4621 | ) |
| 4622 | ) |
| 4623 | ), |
| 4624 | Stream.runDrain, |
| 4625 | Effect.forkChild |
| 4626 | ) |
| 4627 | yield* Deferred.await(latch) |
| 4628 | const result1 = yield* Ref.get(ref) |
| 4629 | const result2 = yield* Stream.runCollect(odds) |
| 4630 | yield* Fiber.await(fiber) |
| 4631 | const result3 = yield* Ref.get(ref) |
| 4632 | return { result1, result2, result3 } |
| 4633 | }) |
| 4634 | ), |
| 4635 | Effect.scoped |
| 4636 | ) |
| 4637 | deepStrictEqual(result1, [2, 0]) |
| 4638 | deepStrictEqual(result2, [1, 3, 5]) |
| 4639 | deepStrictEqual(result3, [4, 2, 0]) |
| 4640 | })) |
| 4641 | }) |
| 4642 | |
| 4643 | describe("partition", () => { |
| 4644 | it.effect("partitionEffect - allows repeated runs without hanging", () => |
| 4645 | Effect.gen(function*() { |
| 4646 | const stream = pipe( |
| 4647 | Stream.fromIterable(Array.empty<number>()), |
| 4648 | Stream.partitionEffect((n) => Effect.succeed(n % 2 === 0 ? Result.succeed(n) : Result.fail(n))), |
| 4649 | Effect.map(([passes, fails]) => pipe(fails, Stream.mergeResult(passes))), |
| 4650 | Effect.flatMap(Stream.runCollect), |
| 4651 | Effect.scoped |
| 4652 | ) |
| 4653 | const result = yield* pipe( |
| 4654 | Effect.all(Array.makeBy(100, () => stream)), |
| 4655 | Effect.as(0) |
| 4656 | ) |
| 4657 | strictEqual(result, 0) |
| 4658 | })) |
| 4659 | |
| 4660 | it.effect("partitionEffect - values", () => |
| 4661 | Effect.gen(function*() { |
| 4662 | const { result1, result2 } = yield* pipe( |
| 4663 | Stream.range(0, 5), |
| 4664 | Stream.partitionEffect((n) => Effect.succeed(n % 2 === 0 ? Result.succeed(n + 10) : Result.fail(`odd:${n}`))), |
| 4665 | Effect.flatMap(([passes, fails]) => |
| 4666 | Effect.all({ |
| 4667 | result1: Stream.runCollect(passes), |
| 4668 | result2: Stream.runCollect(fails) |
| 4669 | }) |
| 4670 | ), |
| 4671 | Effect.scoped |
| 4672 | ) |
| 4673 | deepStrictEqual(result1, [10, 12, 14]) |
| 4674 | deepStrictEqual(result2, ["odd:1", "odd:3", "odd:5"]) |
| 4675 | })) |
| 4676 | |
| 4677 | it.effect("partitionQueue - values", () => |
| 4678 | Effect.gen(function*() { |
| 4679 | const { result1, result2 } = yield* pipe( |
| 4680 | Stream.range(0, 5), |
| 4681 | Stream.partitionQueue((n) => n % 2 === 0 ? Result.succeed(n + 1) : Result.fail(`odd:${n}`)), |
| 4682 | Effect.flatMap(([passes, fails]) => |
| 4683 | Effect.all({ |
| 4684 | result1: Stream.runCollect(Stream.fromQueue(passes)), |
| 4685 | result2: Stream.runCollect(Stream.fromQueue(fails)) |
| 4686 | }) |
| 4687 | ), |
| 4688 | Effect.scoped |
| 4689 | ) |
| 4690 | deepStrictEqual(result1, [1, 3, 5]) |
| 4691 | deepStrictEqual(result2, ["odd:1", "odd:3", "odd:5"]) |
| 4692 | })) |
| 4693 | |
| 4694 | it.effect("partition - values", () => |
| 4695 | Effect.gen(function*() { |
| 4696 | const { result1, result2 } = yield* pipe( |
| 4697 | Stream.range(0, 5), |
| 4698 | Stream.partition((n) => n % 2 === 0 ? Result.succeed(n) : Result.fail(n)), |
| 4699 | Effect.flatMap(([evens, odds]) => |
| 4700 | Effect.all({ |
| 4701 | result1: Stream.runCollect(evens), |
| 4702 | result2: Stream.runCollect(odds) |
| 4703 | }) |
| 4704 | ), |
| 4705 | Effect.scoped |
| 4706 | ) |
| 4707 | deepStrictEqual(result1, [0, 2, 4]) |
| 4708 | deepStrictEqual(result2, [1, 3, 5]) |
| 4709 | })) |
| 4710 | |
| 4711 | it.effect("partition - errors", () => |
| 4712 | Effect.gen(function*() { |
| 4713 | const { result1, result2 } = yield* pipe( |
| 4714 | Stream.make(0), |
| 4715 | Stream.concat(Stream.fail("boom")), |
| 4716 | Stream.partition((n) => n % 2 === 0 ? Result.succeed(n) : Result.fail(n)), |
| 4717 | Effect.flatMap(([evens, odds]) => |
| 4718 | Effect.all({ |
| 4719 | result1: Effect.flip(Stream.runCollect(evens)), |
| 4720 | result2: Effect.flip(Stream.runCollect(odds)) |
| 4721 | }) |
| 4722 | ), |
| 4723 | Effect.scoped |
| 4724 | ) |
| 4725 | assert.strictEqual(result1, "boom") |
| 4726 | assert.strictEqual(result2, "boom") |
| 4727 | })) |
| 4728 | |
| 4729 | it.effect("partition - backpressure", () => |
| 4730 | Effect.gen(function*() { |
| 4731 | const { result1, result2, result3 } = yield* pipe( |
| 4732 | Stream.range(0, 5), |
| 4733 | Stream.partition((n) => (n % 2 === 0 ? Result.succeed(n) : Result.fail(n)), { capacity: 1 }), |
| 4734 | Effect.flatMap(([evens, odds]) => |
| 4735 | Effect.gen(function*() { |
| 4736 | const ref = yield* Ref.make(Array.empty<number>()) |
| 4737 | const latch = yield* (Deferred.make<void>()) |
| 4738 | const fiber = yield* pipe( |
| 4739 | evens, |
| 4740 | Stream.tap((n) => |
| 4741 | pipe( |
| 4742 | Ref.update(ref, Array.prepend(n)), |
| 4743 | Effect.andThen( |
| 4744 | pipe( |
| 4745 | Deferred.succeed(latch, void 0), |
| 4746 | Effect.when(Effect.sync(() => n === 2)) |
| 4747 | ) |
| 4748 | ) |
| 4749 | ) |
| 4750 | ), |
| 4751 | Stream.runDrain, |
| 4752 | Effect.forkChild |
| 4753 | ) |
| 4754 | yield* (Deferred.await(latch)) |
| 4755 | const result1 = yield* (Ref.get(ref)) |
| 4756 | const result2 = yield* (Stream.runCollect(odds)) |
| 4757 | yield* (Fiber.await(fiber)) |
| 4758 | const result3 = yield* (Ref.get(ref)) |
| 4759 | return { result1, result2, result3 } |
| 4760 | }) |
| 4761 | ), |
| 4762 | Effect.scoped |
| 4763 | ) |
| 4764 | deepStrictEqual(result1, [2, 0]) |
| 4765 | deepStrictEqual(result2, [1, 3, 5]) |
| 4766 | deepStrictEqual(result3, [4, 2, 0]) |
| 4767 | })) |
| 4768 | |
| 4769 | it.effect("partition with Filter", () => |
| 4770 | Effect.gen(function*() { |
| 4771 | const { evens, odds } = yield* pipe( |
| 4772 | Stream.range(0, 5), |
| 4773 | Stream.partition((n: number) => n % 2 === 0 ? Result.succeed(n) : Result.fail(n)), |
| 4774 | Effect.flatMap(([pass, fail]) => |
| 4775 | Effect.all({ |
| 4776 | evens: Stream.runCollect(pass), |
| 4777 | odds: Stream.runCollect(fail) |
| 4778 | }) |
| 4779 | ), |
| 4780 | Effect.scoped |
| 4781 | ) |
| 4782 | deepStrictEqual(evens, [0, 2, 4]) |
| 4783 | deepStrictEqual(odds, [1, 3, 5]) |
| 4784 | })) |
| 4785 | }) |
| 4786 | |
| 4787 | describe("peel", () => { |
| 4788 | it.effect("peel", () => |
| 4789 | Effect.gen(function*() { |
| 4790 | const sink = Sink.take<number>(3) |
| 4791 | const [peeled, rest] = yield* pipe( |
| 4792 | Stream.fromArrays(Array.range(1, 3), Array.range(4, 6)), |
| 4793 | Stream.peel(sink), |
| 4794 | Effect.flatMap(([peeled, rest]) => |
| 4795 | pipe( |
| 4796 | Stream.runCollect(rest), |
| 4797 | Effect.map((rest) => [peeled, rest]) |
| 4798 | ) |
| 4799 | ), |
| 4800 | Effect.scoped |
| 4801 | ) |
| 4802 | deepStrictEqual(peeled, [1, 2, 3]) |
| 4803 | deepStrictEqual(rest, [4, 5, 6]) |
| 4804 | })) |
| 4805 | |
| 4806 | it.effect("peel - propagates errors", () => |
| 4807 | Effect.gen(function*() { |
| 4808 | const stream = Stream.fromEffectRepeat(Effect.fail("fail")) |
| 4809 | const sink = Sink.fold<ReadonlyArray<number>, number>( |
| 4810 | Array.empty, |
| 4811 | constTrue, |
| 4812 | (acc, n) => Effect.succeed(Array.append(acc, n)) |
| 4813 | ) |
| 4814 | const result = yield* pipe( |
| 4815 | stream, |
| 4816 | Stream.peel(sink), |
| 4817 | Effect.exit, |
| 4818 | Effect.scoped |
| 4819 | ) |
| 4820 | deepStrictEqual(result, Exit.fail("fail")) |
| 4821 | })) |
| 4822 | }) |
| 4823 | |
| 4824 | describe("repeat", () => { |
| 4825 | it.effect("repeat", () => |
| 4826 | Effect.gen(function*() { |
| 4827 | const result = yield* pipe( |
| 4828 | Stream.make(1), |
| 4829 | Stream.repeat(Schedule.recurs(4)), |
| 4830 | Stream.runCollect |
| 4831 | ) |
| 4832 | deepStrictEqual(result, [1, 1, 1, 1, 1]) |
| 4833 | })) |
| 4834 | |
| 4835 | // it.effect("tick", () => |
| 4836 | // Effect.gen(function*() { |
| 4837 | // const fiber = yield* pipe( |
| 4838 | // Stream.tick("10 millis"), |
| 4839 | // Stream.take(2), |
| 4840 | // Stream.runCollect, |
| 4841 | // Effect.fork |
| 4842 | // ) |
| 4843 | // yield* (TestClock.adjust(Duration.millis(50))) |
| 4844 | // const result = yield* (Fiber.join(fiber)) |
| 4845 | // deepStrictEqual(Array.from(result), [undefined, undefined]) |
| 4846 | // })) |
| 4847 | |
| 4848 | it.effect("repeat - short circuits", () => |
| 4849 | Effect.gen(function*() { |
| 4850 | const ref = yield* Ref.make(Array.empty<number>()) |
| 4851 | const fiber = yield* pipe( |
| 4852 | Stream.fromEffect(Ref.update(ref, Array.prepend(1))), |
| 4853 | Stream.repeat(Schedule.spaced(Duration.millis(10))), |
| 4854 | Stream.take(2), |
| 4855 | Stream.runDrain, |
| 4856 | Effect.forkChild |
| 4857 | ) |
| 4858 | yield* TestClock.adjust(Duration.millis(50)) |
| 4859 | yield* Fiber.join(fiber) |
| 4860 | const result = yield* Ref.get(ref) |
| 4861 | deepStrictEqual(result, [1, 1]) |
| 4862 | })) |
| 4863 | |
| 4864 | // it.effect("repeat - Schedule.CurrentIterationMetadata", () => |
| 4865 | // Effect.gen(function*() { |
| 4866 | // const ref = yield* (Ref.make(Chunk.empty<undefined | Schedule.IterationMetadata>())) |
| 4867 | // const fiber = yield* pipe( |
| 4868 | // Stream.fromEffect( |
| 4869 | // Schedule.CurrentIterationMetadata.pipe( |
| 4870 | // Effect.flatMap((currentIterationMetadata) => Ref.update(ref, Chunk.append(currentIterationMetadata))) |
| 4871 | // ) |
| 4872 | // ), |
| 4873 | // Stream.repeat(Schedule.exponential(Duration.millis(10))), |
| 4874 | // Stream.runDrain, |
| 4875 | // Effect.fork |
| 4876 | // ) |
| 4877 | // |
| 4878 | // yield* (TestClock.adjust(Duration.millis(70))) |
| 4879 | // yield* (Fiber.interrupt(fiber)) |
| 4880 | // const result = yield* (Ref.get(ref)) |
| 4881 | // deepStrictEqual(Array.from(result), [ |
| 4882 | // { |
| 4883 | // elapsed: Duration.zero, |
| 4884 | // elapsedSincePrevious: Duration.zero, |
| 4885 | // input: undefined, |
| 4886 | // output: undefined, |
| 4887 | // now: 0, |
| 4888 | // recurrence: 0, |
| 4889 | // start: 0 |
| 4890 | // }, |
| 4891 | // { |
| 4892 | // elapsed: Duration.zero, |
| 4893 | // elapsedSincePrevious: Duration.zero, |
| 4894 | // input: undefined, |
| 4895 | // output: Duration.millis(10), |
| 4896 | // now: 0, |
| 4897 | // recurrence: 1, |
| 4898 | // start: 0 |
| 4899 | // }, |
| 4900 | // { |
| 4901 | // elapsed: Duration.millis(10), |
| 4902 | // elapsedSincePrevious: Duration.millis(10), |
| 4903 | // input: undefined, |
| 4904 | // output: Duration.millis(20), |
| 4905 | // now: 10, |
| 4906 | // recurrence: 2, |
| 4907 | // start: 0 |
| 4908 | // }, |
| 4909 | // { |
| 4910 | // elapsed: Duration.millis(30), |
| 4911 | // elapsedSincePrevious: Duration.millis(20), |
| 4912 | // input: undefined, |
| 4913 | // output: Duration.millis(40), |
| 4914 | // now: 30, |
| 4915 | // recurrence: 3, |
| 4916 | // start: 0 |
| 4917 | // } |
| 4918 | // ]) |
| 4919 | // })) |
| 4920 | |
| 4921 | it.effect("repeat - does not swallow errors on a repetition", () => |
| 4922 | Effect.gen(function*() { |
| 4923 | const ref = yield* (Ref.make(0)) |
| 4924 | const result = yield* pipe( |
| 4925 | Stream.fromEffect(pipe( |
| 4926 | Ref.getAndUpdate(ref, (n) => n + 1), |
| 4927 | Effect.flatMap((n) => n <= 2 ? Effect.succeed(n) : Effect.fail("boom")) |
| 4928 | )), |
| 4929 | Stream.repeat(Schedule.recurs(3)), |
| 4930 | Stream.runDrain, |
| 4931 | Effect.exit |
| 4932 | ) |
| 4933 | deepStrictEqual(result, Exit.fail("boom")) |
| 4934 | })) |
| 4935 | |
| 4936 | it.effect("repeatElements - simple", () => |
| 4937 | Effect.gen(function*() { |
| 4938 | const result = yield* pipe( |
| 4939 | Stream.make("A", "B", "C"), |
| 4940 | Stream.repeatElements(Schedule.recurs(1)), |
| 4941 | Stream.runCollect |
| 4942 | ) |
| 4943 | deepStrictEqual(result, ["A", "A", "B", "B", "C", "C"]) |
| 4944 | })) |
| 4945 | |
| 4946 | it.effect("repeatElements - short circuits in a schedule", () => |
| 4947 | Effect.gen(function*() { |
| 4948 | const result = yield* pipe( |
| 4949 | Stream.make("A", "B", "C"), |
| 4950 | Stream.repeatElements(Schedule.recurs(1)), |
| 4951 | Stream.take(4), |
| 4952 | Stream.runCollect |
| 4953 | ) |
| 4954 | deepStrictEqual(result, ["A", "A", "B", "B"]) |
| 4955 | })) |
| 4956 | |
| 4957 | it.effect("repeatElements - short circuits after schedule", () => |
| 4958 | Effect.gen(function*() { |
| 4959 | const result = yield* pipe( |
| 4960 | Stream.make("A", "B", "C"), |
| 4961 | Stream.repeatElements(Schedule.recurs(1)), |
| 4962 | Stream.take(3), |
| 4963 | Stream.runCollect |
| 4964 | ) |
| 4965 | deepStrictEqual(result, ["A", "A", "B"]) |
| 4966 | })) |
| 4967 | }) |
| 4968 | |
| 4969 | describe("retry", () => { |
| 4970 | it.effect("retry - retries a failing stream", () => |
| 4971 | Effect.gen(function*() { |
| 4972 | const ref = yield* Ref.make(0) |
| 4973 | const stream = pipe( |
| 4974 | Stream.fromEffect(Ref.getAndUpdate(ref, (n) => n + 1)), |
| 4975 | Stream.concat(Stream.fail(Option.none())) |
| 4976 | ) |
| 4977 | const result = yield* pipe( |
| 4978 | stream, |
| 4979 | Stream.retry(Schedule.forever), |
| 4980 | Stream.take(2), |
| 4981 | Stream.runCollect |
| 4982 | ) |
| 4983 | deepStrictEqual(Array.fromIterable(result), [0, 1]) |
| 4984 | })) |
| 4985 | |
| 4986 | it.effect("retry - cleans up resources before restarting the stream", () => |
| 4987 | Effect.gen(function*() { |
| 4988 | const ref = yield* Ref.make(0) |
| 4989 | const stream = pipe( |
| 4990 | Effect.addFinalizer(() => Ref.getAndUpdate(ref, (n) => n + 1)), |
| 4991 | Effect.as( |
| 4992 | pipe( |
| 4993 | Stream.fromEffect(Ref.get(ref)), |
| 4994 | Stream.concat(Stream.fail(Option.none())) |
| 4995 | ) |
| 4996 | ), |
| 4997 | Stream.unwrap |
| 4998 | ) |
| 4999 | const result = yield* pipe( |
| 5000 | stream, |
| 5001 | Stream.retry(Schedule.forever), |
| 5002 | Stream.take(2), |
| 5003 | Stream.runCollect |
| 5004 | ) |
| 5005 | deepStrictEqual(result, [0, 1]) |
| 5006 | })) |
| 5007 | |
| 5008 | it.effect("retry - retries a failing stream according to a schedule", () => |
| 5009 | Effect.gen(function*() { |
| 5010 | const ref = yield* Ref.make(Array.empty<number>()) |
| 5011 | const stream = pipe( |
| 5012 | Stream.fromEffect( |
| 5013 | pipe( |
| 5014 | Clock.currentTimeMillis, |
| 5015 | Effect.flatMap((n) => Ref.update(ref, Array.prepend(n))) |
| 5016 | ) |
| 5017 | ), |
| 5018 | Stream.flatMap(() => Stream.fail(Option.none())) |
| 5019 | ) |
| 5020 | const fiber = yield* pipe( |
| 5021 | stream, |
| 5022 | Stream.retry(Schedule.exponential(Duration.seconds(1))), |
| 5023 | Stream.take(3), |
| 5024 | Stream.runDrain, |
| 5025 | Effect.forkChild |
| 5026 | ) |
| 5027 | yield* TestClock.adjust(Duration.seconds(1)) |
| 5028 | yield* TestClock.adjust(Duration.seconds(2)) |
| 5029 | yield* Fiber.interrupt(fiber) |
| 5030 | const result = yield* pipe(Ref.get(ref), Effect.map(Array.map((n) => new Date(n).getSeconds()))) |
| 5031 | deepStrictEqual(Array.fromIterable(result), [3, 1, 0]) |
| 5032 | })) |
| 5033 | |
| 5034 | it.effect("retry - reset the schedule after a successful pull", () => |
| 5035 | Effect.gen(function*() { |
| 5036 | const times = yield* Ref.make(Array.empty<number>()) |
| 5037 | const ref = yield* Ref.make(0) |
| 5038 | const effect = pipe( |
| 5039 | Clock.currentTimeMillis, |
| 5040 | Effect.flatMap((time) => |
| 5041 | pipe( |
| 5042 | Ref.update(times, Array.prepend(time / 1000)), |
| 5043 | Effect.andThen(Ref.updateAndGet(ref, (n) => n + 1)) |
| 5044 | ) |
| 5045 | ) |
| 5046 | ) |
| 5047 | const stream = pipe( |
| 5048 | Stream.fromEffect(effect), |
| 5049 | Stream.flatMap((attempt) => |
| 5050 | attempt === 3 || attempt === 5 ? |
| 5051 | Stream.succeed(attempt) : |
| 5052 | Stream.fail(Option.none()) |
| 5053 | ), |
| 5054 | Stream.forever |
| 5055 | ) |
| 5056 | const fiber = yield* pipe( |
| 5057 | stream, |
| 5058 | Stream.retry(Schedule.exponential(Duration.seconds(1))), |
| 5059 | Stream.take(2), |
| 5060 | Stream.runDrain, |
| 5061 | Effect.forkChild |
| 5062 | ) |
| 5063 | yield* TestClock.adjust(Duration.seconds(1)) |
| 5064 | yield* TestClock.adjust(Duration.seconds(2)) |
| 5065 | yield* TestClock.adjust(Duration.seconds(1)) |
| 5066 | yield* Fiber.join(fiber) |
| 5067 | const result = yield* Ref.get(times) |
| 5068 | deepStrictEqual(result, [4, 3, 3, 1, 0]) |
| 5069 | })) |
| 5070 | |
| 5071 | it.effect("retry - Schedule.CurrentMetadata", () => |
| 5072 | Effect.gen(function*() { |
| 5073 | const metadata = yield* Ref.make(Array.empty<undefined | Schedule.Metadata>()) |
| 5074 | const fiber = yield* pipe( |
| 5075 | Stream.fail(1), |
| 5076 | Stream.tapError(Effect.fnUntraced(function*(_) { |
| 5077 | const currentMeta = yield* Schedule.CurrentMetadata |
| 5078 | yield* Ref.update(metadata, Array.append(currentMeta)) |
| 5079 | })), |
| 5080 | Stream.retry(Schedule.exponential(Duration.seconds(1))), |
| 5081 | Stream.runDrain, |
| 5082 | Effect.forkChild({ startImmediately: true }) |
| 5083 | ) |
| 5084 | yield* TestClock.adjust(Duration.seconds(7)) |
| 5085 | yield* Fiber.interrupt(fiber) |
| 5086 | const result = yield* Ref.get(metadata) |
| 5087 | deepStrictEqual(result, [ |
| 5088 | { |
| 5089 | elapsed: 0, |
| 5090 | elapsedSincePrevious: 0, |
| 5091 | input: undefined, |
| 5092 | output: undefined, |
| 5093 | now: 0, |
| 5094 | attempt: 0, |
| 5095 | start: 0, |
| 5096 | duration: Duration.zero |
| 5097 | }, |
| 5098 | { |
| 5099 | elapsed: 0, |
| 5100 | elapsedSincePrevious: 0, |
| 5101 | input: 1, |
| 5102 | output: Duration.millis(1000), |
| 5103 | now: 0, |
| 5104 | attempt: 1, |
| 5105 | start: 0, |
| 5106 | duration: Duration.millis(1000) |
| 5107 | }, |
| 5108 | { |
| 5109 | elapsed: 1000, |
| 5110 | elapsedSincePrevious: 1000, |
| 5111 | input: 1, |
| 5112 | output: Duration.millis(2000), |
| 5113 | now: 1000, |
| 5114 | attempt: 2, |
| 5115 | start: 0, |
| 5116 | duration: Duration.millis(2000) |
| 5117 | }, |
| 5118 | { |
| 5119 | elapsed: 3000, |
| 5120 | elapsedSincePrevious: 2000, |
| 5121 | input: 1, |
| 5122 | output: Duration.millis(4000), |
| 5123 | now: 3000, |
| 5124 | attempt: 3, |
| 5125 | start: 0, |
| 5126 | duration: Duration.millis(4000) |
| 5127 | } |
| 5128 | ]) |
| 5129 | })) |
| 5130 | }) |
| 5131 | |
| 5132 | describe("schedule", () => { |
| 5133 | it.effect("schedule", () => |
| 5134 | Effect.gen(function*() { |
| 5135 | const start = yield* Clock.currentTimeMillis |
| 5136 | const fiber = yield* pipe( |
| 5137 | Stream.range(1, 8), |
| 5138 | Stream.schedule(Schedule.fixed(Duration.millis(100))), |
| 5139 | Stream.mapEffect((n) => |
| 5140 | pipe( |
| 5141 | Clock.currentTimeMillis, |
| 5142 | Effect.map((now) => [n, now - start] as const) |
| 5143 | ) |
| 5144 | ), |
| 5145 | Stream.runCollect, |
| 5146 | Effect.forkChild |
| 5147 | ) |
| 5148 | yield* TestClock.adjust(Duration.millis(800)) |
| 5149 | const result = yield* Fiber.join(fiber) |
| 5150 | deepStrictEqual(result, [ |
| 5151 | [1, 100], |
| 5152 | [2, 200], |
| 5153 | [3, 300], |
| 5154 | [4, 400], |
| 5155 | [5, 500], |
| 5156 | [6, 600], |
| 5157 | [7, 700], |
| 5158 | [8, 800] |
| 5159 | ]) |
| 5160 | })) |
| 5161 | }) |
| 5162 | |
| 5163 | describe("sliding", () => { |
| 5164 | it.effect("sliding and slidingSize normalize window and step sizes", () => |
| 5165 | Effect.gen(function*() { |
| 5166 | const counts = [Number.NaN, 0.5, 1.9, 2.9] |
| 5167 | const windows = yield* Effect.forEach(counts, (n) => |
| 5168 | Stream.make(1, 2, 3).pipe( |
| 5169 | Stream.sliding(n), |
| 5170 | Stream.runCollect |
| 5171 | )) |
| 5172 | const steps = yield* Effect.forEach(counts, (n) => |
| 5173 | Stream.make(1, 2, 3).pipe( |
| 5174 | Stream.slidingSize(2, n), |
| 5175 | Stream.runCollect |
| 5176 | )) |
| 5177 | |
| 5178 | assert.deepStrictEqual(windows, [ |
| 5179 | [[1], [2], [3]], |
| 5180 | [[1], [2], [3]], |
| 5181 | [[1], [2], [3]], |
| 5182 | [[1, 2], [2, 3]] |
| 5183 | ]) |
| 5184 | assert.deepStrictEqual(steps, [ |
| 5185 | [[1, 2], [2, 3]], |
| 5186 | [[1, 2], [2, 3]], |
| 5187 | [[1, 2], [2, 3]], |
| 5188 | [[1, 2], [3]] |
| 5189 | ]) |
| 5190 | })) |
| 5191 | |
| 5192 | it.effect("sliding - returns a sliding window", () => |
| 5193 | Effect.gen(function*() { |
| 5194 | const stream0 = Stream.fromArrays( |
| 5195 | Array.empty<number>(), |
| 5196 | Array.make(1), |
| 5197 | Array.empty<number>(), |
| 5198 | Array.make(2, 3, 4, 5) |
| 5199 | ) |
| 5200 | const stream1 = pipe( |
| 5201 | Stream.empty, |
| 5202 | Stream.concat(Stream.make(1)), |
| 5203 | Stream.concat(Stream.empty), |
| 5204 | Stream.concat(Stream.make(2)), |
| 5205 | Stream.concat(Stream.make(3, 4, 5)) |
| 5206 | ) |
| 5207 | const stream2 = pipe( |
| 5208 | Stream.make(1), |
| 5209 | Stream.concat(Stream.empty), |
| 5210 | Stream.concat(Stream.make(2)), |
| 5211 | Stream.concat(Stream.empty), |
| 5212 | Stream.concat(Stream.make(3, 4, 5)) |
| 5213 | ) |
| 5214 | const stream3 = pipe( |
| 5215 | Stream.make(1), |
| 5216 | Stream.concat(Stream.make(2)), |
| 5217 | Stream.concat(Stream.make(3, 4, 5)) |
| 5218 | ) |
| 5219 | const result1 = yield* pipe( |
| 5220 | Stream.make(1, 2, 3, 4, 5), |
| 5221 | Stream.sliding(2), |
| 5222 | Stream.runCollect |
| 5223 | ) |
| 5224 | const result2 = yield* pipe( |
| 5225 | stream0, |
| 5226 | Stream.sliding(2), |
| 5227 | Stream.runCollect |
| 5228 | ) |
| 5229 | const result3 = yield* pipe( |
| 5230 | stream1, |
| 5231 | Stream.sliding(2), |
| 5232 | Stream.runCollect |
| 5233 | ) |
| 5234 | const result4 = yield* pipe( |
| 5235 | stream2, |
| 5236 | Stream.sliding(2), |
| 5237 | Stream.runCollect |
| 5238 | ) |
| 5239 | const result5 = yield* pipe( |
| 5240 | stream3, |
| 5241 | Stream.sliding(2), |
| 5242 | Stream.runCollect |
| 5243 | ) |
| 5244 | const expected = [[1, 2], [2, 3], [3, 4], [4, 5]] |
| 5245 | deepStrictEqual(result1, expected as any) |
| 5246 | deepStrictEqual(result2, expected as any) |
| 5247 | deepStrictEqual(result3, expected as any) |
| 5248 | deepStrictEqual(result4, expected as any) |
| 5249 | deepStrictEqual(result5, expected as any) |
| 5250 | })) |
| 5251 | |
| 5252 | it.effect("sliding - returns all elements if chunkSize is greater than the size of the stream", () => |
| 5253 | Effect.gen(function*() { |
| 5254 | const result = yield* pipe( |
| 5255 | Stream.range(1, 5), |
| 5256 | Stream.sliding(6), |
| 5257 | Stream.runCollect |
| 5258 | ) |
| 5259 | deepStrictEqual(result, [[1, 2, 3, 4, 5]]) |
| 5260 | })) |
| 5261 | |
| 5262 | it.effect("sliding - is mostly equivalent to ZStream#grouped when stepSize and chunkSize are equal", () => |
| 5263 | Effect.gen(function*() { |
| 5264 | const stream = Stream.range(1, 5) |
| 5265 | const { result1, result2 } = yield* (Effect.all({ |
| 5266 | result1: pipe(stream, Stream.slidingSize(3, 3), Stream.runCollect), |
| 5267 | result2: pipe(stream, Stream.grouped(3), Stream.runCollect) |
| 5268 | })) |
| 5269 | deepStrictEqual(result1, result2) |
| 5270 | })) |
| 5271 | |
| 5272 | it.effect("slidingSize is independent of upstream chunk boundaries", () => |
| 5273 | Effect.gen(function*() { |
| 5274 | const result = yield* Effect.all([ |
| 5275 | Stream.make(1, 2, 3, 4, 5), |
| 5276 | Stream.fromArrays([1, 2], [3, 4, 5]), |
| 5277 | Stream.fromArrays([1], [2], [3], [4], [5]), |
| 5278 | Stream.fromArrays([1], [2], [3], [4]) |
| 5279 | ].map((stream) => stream.pipe(Stream.slidingSize(2, 3), Stream.runCollect))) |
| 5280 | |
| 5281 | deepStrictEqual(result, [ |
| 5282 | [[1, 2], [4, 5]], |
| 5283 | [[1, 2], [4, 5]], |
| 5284 | [[1, 2], [4, 5]], |
| 5285 | [[1, 2], [4]] |
| 5286 | ]) |
| 5287 | })) |
| 5288 | |
| 5289 | it.effect("sliding - fails if upstream produces an error", () => |
| 5290 | Effect.gen(function*() { |
| 5291 | const result = yield* pipe( |
| 5292 | Stream.make(1, 2, 3), |
| 5293 | Stream.concat(Stream.fail("Ouch")), |
| 5294 | Stream.concat(Stream.make(4, 5)), |
| 5295 | Stream.sliding(2), |
| 5296 | Stream.runCollect, |
| 5297 | Effect.flip |
| 5298 | ) |
| 5299 | assert.strictEqual(result, "Ouch") |
| 5300 | })) |
| 5301 | |
| 5302 | it.effect("sliding - should return an empty chunk when the stream is empty", () => |
| 5303 | Effect.gen(function*() { |
| 5304 | const result = yield* pipe(Stream.empty, Stream.sliding(2), Stream.runCollect) |
| 5305 | deepStrictEqual(result, []) |
| 5306 | })) |
| 5307 | |
| 5308 | it.effect("sliding - emits elements properly when a failure occurs", () => |
| 5309 | Effect.gen(function*() { |
| 5310 | const ref = yield* Ref.make(Array.empty<Array.NonEmptyReadonlyArray<number>>()) |
| 5311 | const streamChunks = Stream.fromArrays( |
| 5312 | Array.range(1, 4), |
| 5313 | Array.range(5, 7), |
| 5314 | Array.of(8) |
| 5315 | ) |
| 5316 | const stream = pipe( |
| 5317 | streamChunks, |
| 5318 | Stream.concat(Stream.fail("Ouch")), |
| 5319 | Stream.slidingSize(3, 3) |
| 5320 | ) |
| 5321 | const either = yield* pipe( |
| 5322 | stream, |
| 5323 | Stream.mapEffect((chunk) => Ref.update(ref, Array.append(chunk))), |
| 5324 | Stream.runCollect, |
| 5325 | Effect.flip |
| 5326 | ) |
| 5327 | const result = yield* (Ref.get(ref)) |
| 5328 | assert.strictEqual(either, "Ouch") |
| 5329 | deepStrictEqual(result, [[1, 2, 3], [4, 5, 6], [7, 8]]) |
| 5330 | })) |
| 5331 | }) |
| 5332 | |
| 5333 | describe("split", () => { |
| 5334 | it.effect("split - should split properly", () => |
| 5335 | Effect.gen(function*() { |
| 5336 | const chunks = Array.make( |
| 5337 | Array.range(1, 2), |
| 5338 | Array.range(3, 4), |
| 5339 | Array.range(5, 6), |
| 5340 | Array.make(7, 8, 9), |
| 5341 | Array.of(10) |
| 5342 | ) |
| 5343 | const { result1, result2 } = yield* (Effect.all({ |
| 5344 | result1: pipe( |
| 5345 | Stream.range(0, 9), |
| 5346 | Stream.split((n) => n % 4 === 0), |
| 5347 | Stream.runCollect |
| 5348 | ), |
| 5349 | result2: pipe( |
| 5350 | Stream.fromArrays(...chunks), |
| 5351 | Stream.split((n) => n % 3 === 0), |
| 5352 | Stream.runCollect |
| 5353 | ) |
| 5354 | })) |
| 5355 | deepStrictEqual( |
| 5356 | result1, |
| 5357 | [[1, 2, 3], [5, 6, 7], [9]] |
| 5358 | ) |
| 5359 | deepStrictEqual( |
| 5360 | result2, |
| 5361 | [[1, 2], [4, 5], [7, 8], [10]] |
| 5362 | ) |
| 5363 | })) |
| 5364 | |
| 5365 | it.effect("split - is equivalent to identity when the predicate is not satisfied", () => |
| 5366 | Effect.gen(function*() { |
| 5367 | const stream = Stream.range(1, 10) |
| 5368 | const { result1, result2 } = yield* (Effect.all({ |
| 5369 | result1: pipe(stream, Stream.split((n) => n % 11 === 0), Stream.runCollect), |
| 5370 | result2: pipe( |
| 5371 | Stream.runCollect(stream), |
| 5372 | Effect.map((chunk) => pipe(Array.of(chunk), Array.filter(Array.isArrayNonEmpty))) |
| 5373 | ) |
| 5374 | })) |
| 5375 | deepStrictEqual(result1, [Array.range(1, 10)]) |
| 5376 | deepStrictEqual(result1, result2) |
| 5377 | })) |
| 5378 | |
| 5379 | it.effect("split - should output empty chunk when stream is empty", () => |
| 5380 | Effect.gen(function*() { |
| 5381 | const result = yield* pipe( |
| 5382 | Stream.empty, |
| 5383 | Stream.split((n: number) => n % 11 === 0), |
| 5384 | Stream.runCollect |
| 5385 | ) |
| 5386 | deepStrictEqual(result, []) |
| 5387 | })) |
| 5388 | }) |
| 5389 | |
| 5390 | describe("timeout", () => { |
| 5391 | it.effect("timeoutOrElse - succeed", () => |
| 5392 | Effect.gen(function*() { |
| 5393 | const result = yield* pipe( |
| 5394 | Stream.succeed(1), |
| 5395 | Stream.timeoutOrElse({ |
| 5396 | duration: Duration.infinity, |
| 5397 | orElse: () => Stream.succeed(-1) |
| 5398 | }), |
| 5399 | Stream.runCollect |
| 5400 | ) |
| 5401 | deepStrictEqual(result, [1]) |
| 5402 | })) |
| 5403 | |
| 5404 | it.effect("timeoutOrElse - should switch streams", () => |
| 5405 | Effect.gen(function*() { |
| 5406 | const result = yield* pipe( |
| 5407 | Stream.range(0, 4), |
| 5408 | Stream.tap(() => Effect.sleep(Duration.infinity)), |
| 5409 | Stream.timeoutOrElse({ |
| 5410 | duration: Duration.zero, |
| 5411 | orElse: () => Stream.succeed(4) |
| 5412 | }), |
| 5413 | Stream.runCollect |
| 5414 | ) |
| 5415 | deepStrictEqual(result, [4]) |
| 5416 | })) |
| 5417 | |
| 5418 | it.effect("timeoutOrElse - should not apply timeout after switch", () => |
| 5419 | Effect.gen(function*() { |
| 5420 | const fiber = yield* pipe( |
| 5421 | Stream.never, |
| 5422 | Stream.timeoutOrElse({ |
| 5423 | duration: Duration.zero, |
| 5424 | orElse: () => |
| 5425 | Stream.succeed(1).pipe( |
| 5426 | Stream.tap(() => Effect.sleep(Duration.seconds(1))) |
| 5427 | ) |
| 5428 | }), |
| 5429 | Stream.runCollect, |
| 5430 | Effect.forkChild({ startImmediately: true }) |
| 5431 | ) |
| 5432 | yield* TestClock.adjust(Duration.seconds(1)) |
| 5433 | const result = yield* Fiber.join(fiber) |
| 5434 | deepStrictEqual(result, [1]) |
| 5435 | })) |
| 5436 | |
| 5437 | it.effect("timeout - succeed", () => |
| 5438 | Effect.gen(function*() { |
| 5439 | const result = yield* pipe( |
| 5440 | Stream.succeed(1), |
| 5441 | Stream.timeout(Duration.infinity), |
| 5442 | Stream.runCollect |
| 5443 | ) |
| 5444 | deepStrictEqual(result, [1]) |
| 5445 | })) |
| 5446 | |
| 5447 | it.effect("timeout - should end the stream", () => |
| 5448 | Effect.gen(function*() { |
| 5449 | const result = yield* pipe( |
| 5450 | Stream.range(0, 4), |
| 5451 | Stream.tap(() => Effect.sleep(Duration.infinity)), |
| 5452 | Stream.timeout(Duration.zero), |
| 5453 | Stream.runCollect |
| 5454 | ) |
| 5455 | deepStrictEqual(result, []) |
| 5456 | })) |
| 5457 | }) |
| 5458 | |
| 5459 | describe("when", () => { |
| 5460 | it.effect("when - returns the stream if the condition is satisfied", () => |
| 5461 | Effect.gen(function*() { |
| 5462 | const stream = Stream.make(1, 2, 3, 4, 5) |
| 5463 | const { result1, result2 } = yield* (Effect.all({ |
| 5464 | result1: pipe(stream, Stream.when(Effect.succeed(true)), Stream.runCollect), |
| 5465 | result2: Stream.runCollect(stream) |
| 5466 | })) |
| 5467 | deepStrictEqual(result1, result2) |
| 5468 | })) |
| 5469 | |
| 5470 | it.effect("when - returns an empty stream if the condition is not satisfied", () => |
| 5471 | Effect.gen(function*() { |
| 5472 | const result = yield* pipe( |
| 5473 | Stream.make(1, 2, 3, 4, 5), |
| 5474 | Stream.when(Effect.succeed(false)), |
| 5475 | Stream.runCollect |
| 5476 | ) |
| 5477 | deepStrictEqual(result, []) |
| 5478 | })) |
| 5479 | |
| 5480 | it.effect("when - dies if the condition throws an exception", () => |
| 5481 | Effect.gen(function*() { |
| 5482 | const error = "boom" |
| 5483 | const result = yield* pipe( |
| 5484 | Stream.make(1, 2, 3), |
| 5485 | Stream.when(Effect.sync(() => { |
| 5486 | throw error |
| 5487 | })), |
| 5488 | Stream.runDrain, |
| 5489 | Effect.exit |
| 5490 | ) |
| 5491 | deepStrictEqual(result, Exit.die(error)) |
| 5492 | })) |
| 5493 | |
| 5494 | it.effect("when - returns the stream if the effectful condition is satisfied", () => |
| 5495 | Effect.gen(function*() { |
| 5496 | const result = yield* pipe( |
| 5497 | Stream.make(1, 2, 3, 4, 5), |
| 5498 | Stream.when(Effect.succeed(true)), |
| 5499 | Stream.runCollect |
| 5500 | ) |
| 5501 | deepStrictEqual(result, [1, 2, 3, 4, 5]) |
| 5502 | })) |
| 5503 | |
| 5504 | it.effect("when - returns an empty stream if the effectful condition is not satisfied", () => |
| 5505 | Effect.gen(function*() { |
| 5506 | const result = yield* pipe( |
| 5507 | Stream.make(1, 2, 3, 4, 5), |
| 5508 | Stream.when(Effect.succeed(false)), |
| 5509 | Stream.runCollect |
| 5510 | ) |
| 5511 | deepStrictEqual(result, []) |
| 5512 | })) |
| 5513 | |
| 5514 | it.effect("when - fails if the effectful condition fails", () => |
| 5515 | Effect.gen(function*() { |
| 5516 | const error = "boom" |
| 5517 | const result = yield* pipe( |
| 5518 | Stream.make(1, 2, 3), |
| 5519 | Stream.when(Effect.fail(error)), |
| 5520 | Stream.runDrain, |
| 5521 | Effect.exit |
| 5522 | ) |
| 5523 | deepStrictEqual(result, Exit.fail(error)) |
| 5524 | })) |
| 5525 | }) |
| 5526 | |
| 5527 | describe("zipWithNext", () => { |
| 5528 | it.effect("zipWithNext", () => |
| 5529 | Effect.gen(function*() { |
| 5530 | const result = yield* pipe( |
| 5531 | Stream.make(1, 2, 3), |
| 5532 | Stream.zipWithNext, |
| 5533 | Stream.runCollect |
| 5534 | ) |
| 5535 | deepStrictEqual(result, [ |
| 5536 | [1, Option.some(2)], |
| 5537 | [2, Option.some(3)], |
| 5538 | [3, Option.none()] |
| 5539 | ]) |
| 5540 | })) |
| 5541 | |
| 5542 | it.effect("zipWithNext - should work with multiple chunks", () => |
| 5543 | Effect.gen(function*() { |
| 5544 | const result = yield* pipe( |
| 5545 | Stream.fromArrays([1], [2], [3]), |
| 5546 | Stream.zipWithNext, |
| 5547 | Stream.runCollect |
| 5548 | ) |
| 5549 | deepStrictEqual(result, [ |
| 5550 | [1, Option.some(2)], |
| 5551 | [2, Option.some(3)], |
| 5552 | [3, Option.none()] |
| 5553 | ]) |
| 5554 | })) |
| 5555 | |
| 5556 | it.effect("zipWithNext - should work with an empty stream", () => |
| 5557 | Effect.gen(function*() { |
| 5558 | const result = yield* pipe( |
| 5559 | Stream.empty, |
| 5560 | Stream.zipWithNext, |
| 5561 | Stream.runCollect |
| 5562 | ) |
| 5563 | deepStrictEqual(result, []) |
| 5564 | })) |
| 5565 | |
| 5566 | it.effect("zipWithPrevious - should zip with previous element for a single chunk", () => |
| 5567 | Effect.gen(function*() { |
| 5568 | const result = yield* pipe( |
| 5569 | Stream.make(1, 2, 3), |
| 5570 | Stream.zipWithPrevious, |
| 5571 | Stream.runCollect |
| 5572 | ) |
| 5573 | deepStrictEqual(result, [ |
| 5574 | [Option.none(), 1], |
| 5575 | [Option.some(1), 2], |
| 5576 | [Option.some(2), 3] |
| 5577 | ]) |
| 5578 | })) |
| 5579 | |
| 5580 | it.effect("zipWithPrevious - should work with multiple chunks", () => |
| 5581 | Effect.gen(function*() { |
| 5582 | const result = yield* pipe( |
| 5583 | Stream.fromArrays([1], [2], [3]), |
| 5584 | Stream.zipWithPrevious, |
| 5585 | Stream.runCollect |
| 5586 | ) |
| 5587 | deepStrictEqual(result, [ |
| 5588 | [Option.none(), 1], |
| 5589 | [Option.some(1), 2], |
| 5590 | [Option.some(2), 3] |
| 5591 | ]) |
| 5592 | })) |
| 5593 | |
| 5594 | it.effect("zipWithPrevious - should work with an empty stream", () => |
| 5595 | Effect.gen(function*() { |
| 5596 | const result = yield* pipe( |
| 5597 | Stream.empty, |
| 5598 | Stream.zipWithPrevious, |
| 5599 | Stream.runCollect |
| 5600 | ) |
| 5601 | deepStrictEqual(result, []) |
| 5602 | })) |
| 5603 | |
| 5604 | it("zipWithPrevious - should output same values as first element plus zipping with init", () => |
| 5605 | fc.assert(fc.asyncProperty(fc.array(fc.array(fc.integer())), async (chunks) => { |
| 5606 | const stream = Stream.fromArrays(...chunks) |
| 5607 | const { result1, result2 } = await Effect.runPromise(Effect.all({ |
| 5608 | result1: pipe( |
| 5609 | stream, |
| 5610 | Stream.zipWithPrevious, |
| 5611 | Stream.runCollect |
| 5612 | ), |
| 5613 | result2: pipe( |
| 5614 | Stream.make(Option.none()), |
| 5615 | Stream.concat(pipe(stream, Stream.map(Option.some))), |
| 5616 | Stream.zip(stream), |
| 5617 | Stream.runCollect |
| 5618 | ) |
| 5619 | })) |
| 5620 | deepStrictEqual(result1, result2) |
| 5621 | }))) |
| 5622 | |
| 5623 | it.effect("zipWithPreviousAndNext", () => |
| 5624 | Effect.gen(function*() { |
| 5625 | const result = yield* pipe( |
| 5626 | Stream.make(1, 2, 3), |
| 5627 | Stream.zipWithPreviousAndNext, |
| 5628 | Stream.runCollect |
| 5629 | ) |
| 5630 | deepStrictEqual(result, [ |
| 5631 | [Option.none(), 1, Option.some(2)], |
| 5632 | [Option.some(1), 2, Option.some(3)], |
| 5633 | [Option.some(2), 3, Option.none()] |
| 5634 | ]) |
| 5635 | })) |
| 5636 | |
| 5637 | it("zipWithPreviousAndNext - should output same values as zipping with both previous and next element", () => |
| 5638 | fc.assert(fc.asyncProperty(fc.array(fc.array(fc.integer()), { minLength: 0, maxLength: 5 }), async (chunks) => { |
| 5639 | const stream = Stream.fromArrays(...chunks) |
| 5640 | const previous = pipe( |
| 5641 | Stream.make(Option.none()), |
| 5642 | Stream.concat(pipe(stream, Stream.map(Option.some))) |
| 5643 | ) |
| 5644 | const next = pipe( |
| 5645 | stream, |
| 5646 | Stream.drop(1), |
| 5647 | Stream.map(Option.some), |
| 5648 | Stream.concat(Stream.make(Option.none())) |
| 5649 | ) |
| 5650 | const { result1, result2 } = await pipe( |
| 5651 | Effect.all({ |
| 5652 | result1: pipe( |
| 5653 | stream, |
| 5654 | Stream.zipWithPreviousAndNext, |
| 5655 | Stream.runCollect |
| 5656 | ), |
| 5657 | result2: pipe( |
| 5658 | previous, |
| 5659 | Stream.zip(stream), |
| 5660 | Stream.zipFlatten(next), |
| 5661 | Stream.runCollect |
| 5662 | ) |
| 5663 | }), |
| 5664 | Effect.runPromise |
| 5665 | ) |
| 5666 | deepStrictEqual(result1, result2) |
| 5667 | }))) |
| 5668 | }) |
| 5669 | |
| 5670 | describe("broadcast", () => { |
| 5671 | it.effect("ends a subscriber that subscribes after the upstream has ended", () => |
| 5672 | Effect.gen(function*() { |
| 5673 | const stream = yield* Stream.broadcast(Stream.fromArrays([1], [2], [3]), { capacity: 8, replay: 2 }) |
| 5674 | yield* Stream.runDrain(stream) |
| 5675 | |
| 5676 | deepStrictEqual(yield* Stream.runCollect(stream), [2, 3]) |
| 5677 | })) |
| 5678 | |
| 5679 | it.effect("fails a subscriber that subscribes after the upstream has failed", () => |
| 5680 | Effect.gen(function*() { |
| 5681 | const stream = yield* Stream.broadcast(Stream.fail("boom"), { capacity: 8 }) |
| 5682 | yield* Effect.exit(Stream.runDrain(stream)) |
| 5683 | |
| 5684 | deepStrictEqual(yield* Effect.exit(Stream.runCollect(stream)), Exit.fail("boom")) |
| 5685 | })) |
| 5686 | }) |
| 5687 | |
| 5688 | describe("broadcastN", () => { |
| 5689 | it.effect("normalizes the number of downstream streams", () => |
| 5690 | Effect.gen(function*() { |
| 5691 | const results = yield* Effect.forEach([Number.NaN, -1, 0.5, 1.9, 2.9], (n) => |
| 5692 | Stream.empty.pipe( |
| 5693 | Stream.broadcastN({ n, capacity: 1 }), |
| 5694 | Effect.map((streams) => streams.length) |
| 5695 | )) |
| 5696 | assert.deepStrictEqual(results, [0, 0, 0, 1, 2]) |
| 5697 | })) |
| 5698 | |
| 5699 | it.effect("fans out to a fixed number of streams", () => |
| 5700 | Effect.gen(function*() { |
| 5701 | const [left, right] = yield* Stream.make(1, 2, 3).pipe( |
| 5702 | Stream.broadcastN({ n: 2, capacity: 4 }) |
| 5703 | ) |
| 5704 | |
| 5705 | const result = yield* Effect.all([ |
| 5706 | Stream.runCollect(left), |
| 5707 | Stream.runCollect(right) |
| 5708 | ], { concurrency: "unbounded" }) |
| 5709 | |
| 5710 | assert.deepStrictEqual(result, [[1, 2, 3], [1, 2, 3]]) |
| 5711 | })) |
| 5712 | |
| 5713 | it.effect("ends a subscriber whose end a full dropping buffer would have dropped", () => |
| 5714 | Effect.gen(function*() { |
| 5715 | const [stream] = yield* Stream.broadcastN(Stream.make(1, 2, 3), { n: 1, capacity: 1, strategy: "dropping" }) |
| 5716 | // Let the upstream fill the single slot and end before the subscriber pulls. |
| 5717 | yield* Effect.yieldNow |
| 5718 | |
| 5719 | deepStrictEqual(yield* Stream.runCollect(stream), [1, 2, 3]) |
| 5720 | })) |
| 5721 | |
| 5722 | it.effect("propagates failures to all downstream streams", () => |
| 5723 | Effect.gen(function*() { |
| 5724 | const [left, right] = yield* Stream.fail("boom").pipe( |
| 5725 | Stream.broadcastN({ n: 2, capacity: 4 }) |
| 5726 | ) |
| 5727 | |
| 5728 | const result = yield* Effect.all([ |
| 5729 | Stream.runCollect(left).pipe(Effect.exit), |
| 5730 | Stream.runCollect(right).pipe(Effect.exit) |
| 5731 | ], { concurrency: "unbounded" }) |
| 5732 | |
| 5733 | assert.deepStrictEqual(result, [Exit.fail("boom"), Exit.fail("boom")]) |
| 5734 | })) |
| 5735 | }) |
| 5736 | |
| 5737 | describe("fromEventListener", () => { |
| 5738 | it.effect("subscribes and emits events", () => |
| 5739 | Effect.gen(function*() { |
| 5740 | const target = new EventTarget() |
| 5741 | |
| 5742 | const dispatchEvents = Effect.gen(function*() { |
| 5743 | yield* Effect.yieldNow |
| 5744 | target.dispatchEvent(new CustomEvent("test", { detail: 1 })) |
| 5745 | target.dispatchEvent(new CustomEvent("test", { detail: 2 })) |
| 5746 | target.dispatchEvent(new CustomEvent("test", { detail: 3 })) |
| 5747 | target.dispatchEvent(new CustomEvent("test", { detail: 4 })) |
| 5748 | }) |
| 5749 | |
| 5750 | const stream = Stream.fromEventListener<CustomEvent>(target, "test") |
| 5751 | |
| 5752 | const [result] = yield* Effect.all([ |
| 5753 | stream.pipe( |
| 5754 | Stream.map((event) => event.detail), |
| 5755 | // take is required because the stream will never terminate on its own |
| 5756 | Stream.take(4), |
| 5757 | Stream.runCollect |
| 5758 | ), |
| 5759 | dispatchEvents |
| 5760 | ], { concurrency: "unbounded" }) |
| 5761 | |
| 5762 | assert.deepStrictEqual(result, [1, 2, 3, 4]) |
| 5763 | })) |
| 5764 | |
| 5765 | it.effect("ends after the first event with once: true", () => |
| 5766 | Effect.gen(function*() { |
| 5767 | const target = new EventTarget() |
| 5768 | |
| 5769 | const dispatchEvents = Effect.gen(function*() { |
| 5770 | yield* Effect.yieldNow |
| 5771 | target.dispatchEvent(new CustomEvent("test", { detail: 1 })) |
| 5772 | target.dispatchEvent(new CustomEvent("test", { detail: 2 })) |
| 5773 | }) |
| 5774 | |
| 5775 | const stream = Stream.fromEventListener<CustomEvent>(target, "test", { once: true }) |
| 5776 | |
| 5777 | const [result] = yield* Effect.all([ |
| 5778 | stream.pipe( |
| 5779 | Stream.map((event) => event.detail), |
| 5780 | Stream.runCollect |
| 5781 | ), |
| 5782 | dispatchEvents |
| 5783 | ], { concurrency: "unbounded" }) |
| 5784 | |
| 5785 | assert.deepStrictEqual(result, [1]) |
| 5786 | })) |
| 5787 | }) |
| 5788 | }) |
| 5789 | |
| 5790 | const grouped = <A>(arr: Array<A>, size: number): Array<NonEmptyArray<A>> => { |
| 5791 | const builder: Array<NonEmptyArray<A>> = [] |
| 5792 | for (let i = 0; i < arr.length; i = i + size) { |
| 5793 | builder.push(arr.slice(i, i + size) as NonEmptyArray<A>) |
| 5794 | } |
| 5795 | return builder |
| 5796 | } |