| 1 | import { assert, describe, it } from "@effect/vitest" |
| 2 | import { Deferred, Effect, Exit, Fiber } from "effect" |
| 3 | import * as Worker from "effect/workers/Worker" |
| 4 | import { isWorkerError, WorkerError, WorkerReceiveError } from "effect/workers/WorkerError" |
| 5 | |
| 6 | interface TestPort { |
| 7 | readonly postMessage: (message: any, transfers?: any) => void |
| 8 | } |
| 9 | |
| 10 | const testPort: TestPort = { postMessage: () => {} } |
| 11 | |
| 12 | const makePlatform = ( |
| 13 | onListen: (options: { |
| 14 | readonly emit: (data: any) => void |
| 15 | readonly deferred: Deferred.Deferred<never, WorkerError> |
| 16 | }) => void |
| 17 | ) => |
| 18 | Worker.makePlatform<TestPort>()({ |
| 19 | setup: ({ worker }) => Effect.succeed(worker), |
| 20 | listen: ({ deferred, emit }) => Effect.sync(() => onListen({ deferred, emit })) |
| 21 | }) |
| 22 | |
| 23 | const spawnerLayer = Worker.layerSpawner(() => testPort) |
| 24 | |
| 25 | const exitError = new WorkerError({ |
| 26 | reason: new WorkerReceiveError({ message: "The worker has exited with code: 1" }) |
| 27 | }) |
| 28 | |
| 29 | describe("Worker", () => { |
| 30 | it.effect("run fails when the worker exits before the ready message", () => |
| 31 | Effect.gen(function*() { |
| 32 | const platform = makePlatform(({ deferred }) => { |
| 33 | Deferred.doneUnsafe(deferred, exitError) |
| 34 | }) |
| 35 | const worker = yield* platform.spawn(0) |
| 36 | const error = yield* Effect.flip(worker.run(() => Effect.void)) |
| 37 | assert.isTrue(isWorkerError(error)) |
| 38 | }).pipe(Effect.provide(spawnerLayer))) |
| 39 | |
| 40 | it.effect("run fails when the worker exits while waiting for ready", () => |
| 41 | Effect.gen(function*() { |
| 42 | let deferred: Deferred.Deferred<never, WorkerError> | undefined |
| 43 | const platform = makePlatform((options) => { |
| 44 | deferred = options.deferred |
| 45 | }) |
| 46 | const worker = yield* platform.spawn(0) |
| 47 | const fiber = yield* Effect.forkChild( |
| 48 | worker.run(() => Effect.void), |
| 49 | { startImmediately: true } |
| 50 | ) |
| 51 | assert.isUndefined(fiber.pollUnsafe()) |
| 52 | |
| 53 | Deferred.doneUnsafe(deferred!, exitError) |
| 54 | const exit = yield* Fiber.await(fiber) |
| 55 | assert.isTrue(Exit.isFailure(exit)) |
| 56 | }).pipe(Effect.provide(spawnerLayer))) |
| 57 | |
| 58 | it.effect("run is interruptible while waiting for ready", () => |
| 59 | Effect.gen(function*() { |
| 60 | const platform = makePlatform(() => {}) |
| 61 | const worker = yield* platform.spawn(0) |
| 62 | const fiber = yield* Effect.forkChild( |
| 63 | worker.run(() => Effect.void), |
| 64 | { startImmediately: true } |
| 65 | ) |
| 66 | assert.isUndefined(fiber.pollUnsafe()) |
| 67 | |
| 68 | yield* Fiber.interrupt(fiber) |
| 69 | const exit = yield* Fiber.await(fiber) |
| 70 | assert.isTrue(Exit.hasInterrupts(exit)) |
| 71 | }).pipe(Effect.provide(spawnerLayer))) |
| 72 | |
| 73 | it.effect("run still fails on worker exit after ready", () => |
| 74 | Effect.gen(function*() { |
| 75 | let deferred: Deferred.Deferred<never, WorkerError> | undefined |
| 76 | const platform = makePlatform((options) => { |
| 77 | deferred = options.deferred |
| 78 | options.emit([0]) |
| 79 | }) |
| 80 | const worker = yield* platform.spawn(0) |
| 81 | const fiber = yield* Effect.forkChild( |
| 82 | worker.run(() => Effect.void), |
| 83 | { startImmediately: true } |
| 84 | ) |
| 85 | assert.isUndefined(fiber.pollUnsafe()) |
| 86 | |
| 87 | Deferred.doneUnsafe(deferred!, exitError) |
| 88 | const exit = yield* Fiber.await(fiber) |
| 89 | assert.isTrue(Exit.isFailure(exit)) |
| 90 | }).pipe(Effect.provide(spawnerLayer))) |
| 91 | }) |