1import * as NodeServices from "@effect/platform-node/NodeServices";
2import { expect, it } from "@effect/vitest";
3import {
4 EnvironmentId,
5 PreviewAutomationClientDisconnectedError,
6 PreviewAutomationInvalidSelectorError,
7 PreviewAutomationMalformedResponseError,
8 PreviewAutomationNoAvailableHostError,
9 PreviewAutomationTargetNotEditableError,
10 PreviewTabId,
11 ProviderInstanceId,
12 ThreadId,
13 type PreviewAutomationHost,
14 type PreviewAutomationRequest,
15 type PreviewAutomationStreamEvent,
16 SERVER_BROWSER_AUTOMATION_CLIENT_ID,
17} from "@t3tools/contracts";
18import * as Effect from "effect/Effect";
19import * as Exit from "effect/Exit";
20import * as Deferred from "effect/Deferred";
21import * as Fiber from "effect/Fiber";
22import * as Result from "effect/Result";
23import * as Scheduler from "effect/Scheduler";
24import * as Stream from "effect/Stream";
25import * as TestClock from "effect/testing/TestClock";
26
27import * as PreviewAutomationBroker from "./PreviewAutomationBroker.ts";
28
29const makeBroker = PreviewAutomationBroker.make.pipe(Effect.provide(NodeServices.layer));
30
31const scope = {
32 environmentId: EnvironmentId.make("environment-1"),
33 requestNamespace: "provider-session-1",
34 thread: {
35 threadId: ThreadId.make("thread-1"),
36 providerSessionId: "provider-session-1",
37 providerInstanceId: ProviderInstanceId.make("codex"),
38 },
39 client: undefined,
40 capabilities: new Set(["preview"] as const),
41 issuedAt: 1,
42};
43
44const makeHost = (overrides: Partial<PreviewAutomationHost> = {}): PreviewAutomationHost => ({
45 clientId: "client-1",
46 environmentId: scope.environmentId,
47 ...overrides,
48});
49
50type RoutedRequest = PreviewAutomationRequest & {
51 readonly connectionId: PreviewAutomationStreamEvent["connectionId"];
52};
53
54const requestsFrom = (
55 events: Stream.Stream<PreviewAutomationStreamEvent>,
56 onConnected: (connectionId: PreviewAutomationStreamEvent["connectionId"]) => void = () => {},
57): Stream.Stream<RoutedRequest> =>
58 events.pipe(
59 Stream.filterMap((event) => {
60 if (event.type === "connected") {
61 onConnected(event.connectionId);
62 return Result.failVoid;
63 }
64 return Result.succeed({ ...event.request, connectionId: event.connectionId });
65 }),
66 );
67
68it.effect("atomically registers a connected host and correlates its response", () =>
69 Effect.scoped(
70 Effect.gen(function* () {
71 const broker = yield* makeBroker;
72 const requests = requestsFrom(yield* broker.connect(makeHost()));
73 yield* Stream.runForEach(requests, (request) =>
74 broker.respond({
75 clientId: "client-1",
76 connectionId: request.connectionId,
77 requestId: request.requestId,
78 ok: true,
79 result: { available: true },
80 }),
81 ).pipe(Effect.forkScoped);
82 yield* Effect.yieldNow;
83
84 const result = yield* broker.invoke<{ available: boolean }>({
85 scope,
86 operation: "open",
87 input: {},
88 });
89
90 expect(result).toEqual({ available: true });
91 }),
92 ),
93);
94
95it.effect("targets multiple tabs explicitly while retaining a default tab", () =>
96 Effect.scoped(
97 Effect.gen(function* () {
98 const broker = yield* makeBroker;
99 const appTabId = PreviewTabId.make("tab-web-app");
100 const simulatorTabId = PreviewTabId.make("tab-ios-simulator");
101 const openedTabIds = [appTabId, simulatorTabId];
102 let openIndex = 0;
103 const routedRequests: RoutedRequest[] = [];
104 const requests = requestsFrom(yield* broker.connect(makeHost()));
105 yield* Stream.runForEach(requests, (request) => {
106 routedRequests.push(request);
107 return broker.respond({
108 clientId: "client-1",
109 connectionId: request.connectionId,
110 requestId: request.requestId,
111 ok: true,
112 result:
113 request.operation === "open"
114 ? { available: true, tabId: openedTabIds[openIndex++] }
115 : { url: "http://localhost:3200" },
116 });
117 }).pipe(Effect.forkScoped);
118 yield* Effect.yieldNow;
119
120 yield* broker.invoke({ scope, operation: "open", input: { reuseExistingTab: false } });
121 yield* broker.invoke({ scope, operation: "open", input: { reuseExistingTab: false } });
122 yield* broker.invoke({ scope, operation: "snapshot", input: {} });
123 yield* broker.invoke({ scope, operation: "snapshot", input: {}, tabId: appTabId });
124 yield* broker.invoke({ scope, operation: "snapshot", input: {} });
125
126 expect(routedRequests).toHaveLength(5);
127 expect(routedRequests[0]?.tabId).toBeUndefined();
128 expect(routedRequests[1]?.tabId).toBe(appTabId);
129 expect(routedRequests[2]?.tabId).toBe(simulatorTabId);
130 expect(routedRequests[2]?.tabIdExplicit).toBe(false);
131 expect(routedRequests[3]?.tabId).toBe(appTabId);
132 expect(routedRequests[3]?.tabIdExplicit).toBe(true);
133 expect(routedRequests[4]?.tabId).toBe(appTabId);
134 }),
135 ),
136);
137
138it.effect.each([true, false])(
139 "keeps an older target stable while a newer explicit tab responds (implicit: %s)",
140 (implicit) =>
141 Effect.scoped(
142 Effect.gen(function* () {
143 const broker = yield* makeBroker;
144 const olderTabId = PreviewTabId.make("tab-older-request");
145 const newerTabId = PreviewTabId.make("tab-newer-request");
146 const releaseOlderResponse = yield* Deferred.make<void>();
147 const routedRequests: RoutedRequest[] = [];
148 const requests = requestsFrom(yield* broker.connect(makeHost()));
149 yield* Stream.runForEach(requests, (request) => {
150 routedRequests.push(request);
151 const response = Effect.gen(function* () {
152 if (request.tabId === olderTabId && request.operation === "snapshot") {
153 yield* Deferred.await(releaseOlderResponse);
154 }
155 yield* broker.respond({
156 clientId: "client-1",
157 connectionId: request.connectionId,
158 requestId: request.requestId,
159 ok: true,
160 result: { url: "http://localhost:3200" },
161 });
162 if (request.tabId === newerTabId) {
163 yield* Deferred.succeed(releaseOlderResponse, undefined);
164 }
165 });
166 return response.pipe(Effect.forkScoped, Effect.asVoid);
167 }).pipe(Effect.forkScoped);
168 yield* Effect.yieldNow;
169
170 yield* broker.invoke({ scope, operation: "status", input: {}, tabId: olderTabId });
171 let capturedTabId: PreviewTabId | undefined;
172 const older = yield* broker
173 .invoke({
174 scope,
175 operation: "snapshot",
176 input: {},
177 ...(implicit ? {} : { tabId: olderTabId }),
178 onTargetTab: (tabId) => {
179 capturedTabId = tabId;
180 },
181 })
182 .pipe(Effect.forkScoped);
183 yield* Effect.yieldNow;
184 const newer = yield* broker
185 .invoke({ scope, operation: "snapshot", input: {}, tabId: newerTabId })
186 .pipe(Effect.forkScoped);
187 yield* Fiber.join(newer);
188 yield* Fiber.join(older);
189 yield* broker.invoke({
190 scope,
191 operation: "status",
192 input: {},
193 tabId: olderTabId,
194 updateCurrentTab: false,
195 });
196 yield* broker.invoke({ scope, operation: "snapshot", input: {} });
197
198 expect(routedRequests.at(-1)?.tabId).toBe(newerTabId);
199 expect(capturedTabId).toBe(olderTabId);
200 }),
201 ),
202);
203
204it.effect("tracks the tab returned by a targeted recording stop", () =>
205 Effect.scoped(
206 Effect.gen(function* () {
207 const broker = yield* makeBroker;
208 const browsingTabId = PreviewTabId.make("tab-session-b");
209 const recordingTabId = PreviewTabId.make("tab-session-a-recording");
210 const routedRequests: RoutedRequest[] = [];
211 const requests = requestsFrom(yield* broker.connect(makeHost()));
212 yield* Stream.runForEach(requests, (request) => {
213 routedRequests.push(request);
214 return broker.respond({
215 clientId: "client-1",
216 connectionId: request.connectionId,
217 requestId: request.requestId,
218 ok: true,
219 result:
220 request.operation === "open"
221 ? { available: true, tabId: browsingTabId }
222 : request.operation === "recordingStop"
223 ? { id: "recording-1", tabId: recordingTabId }
224 : { url: "http://localhost:3200" },
225 });
226 }).pipe(Effect.forkScoped);
227 yield* Effect.yieldNow;
228
229 yield* broker.invoke({ scope, operation: "open", input: {} });
230 yield* broker.invoke({ scope, operation: "recordingStop", input: {} });
231 yield* broker.invoke({ scope, operation: "snapshot", input: {} });
232
233 expect(routedRequests.at(-1)?.tabId).toBe(recordingTabId);
234 }),
235 ),
236);
237
238it.effect("does not let a no-tab response suppress an earlier tab decision", () =>
239 Effect.scoped(
240 Effect.gen(function* () {
241 const broker = yield* makeBroker;
242 const initialTabId = PreviewTabId.make("tab-initial");
243 const openedTabId = PreviewTabId.make("tab-opened-late");
244 const releaseOpenResponse = yield* Deferred.make<void>();
245 const routedRequests: RoutedRequest[] = [];
246 const requests = requestsFrom(yield* broker.connect(makeHost()));
247 yield* Stream.runForEach(requests, (request) => {
248 routedRequests.push(request);
249 const marker =
250 typeof request.input === "object" && request.input !== null && "marker" in request.input
251 ? request.input.marker
252 : undefined;
253 const response = Effect.gen(function* () {
254 if (marker === "older") {
255 yield* Deferred.await(releaseOpenResponse);
256 }
257 yield* broker.respond({
258 clientId: "client-1",
259 connectionId: request.connectionId,
260 requestId: request.requestId,
261 ok: true,
262 result:
263 request.operation === "open"
264 ? { available: true, tabId: marker === "older" ? openedTabId : initialTabId }
265 : { url: "http://localhost:3200" },
266 });
267 if (marker === "newer") {
268 yield* Deferred.succeed(releaseOpenResponse, undefined);
269 }
270 });
271 return response.pipe(Effect.forkScoped, Effect.asVoid);
272 }).pipe(Effect.forkScoped);
273 yield* Effect.yieldNow;
274
275 yield* broker.invoke({ scope, operation: "open", input: {} });
276 const older = yield* broker
277 .invoke({
278 scope,
279 operation: "open",
280 input: { marker: "older", reuseExistingTab: false },
281 })
282 .pipe(Effect.forkScoped);
283 yield* Effect.yieldNow;
284 const newer = yield* broker
285 .invoke({ scope, operation: "snapshot", input: { marker: "newer" } })
286 .pipe(Effect.forkScoped);
287 yield* Fiber.join(newer);
288 yield* Fiber.join(older);
289 yield* broker.invoke({ scope, operation: "snapshot", input: {} });
290
291 expect(routedRequests.at(-1)?.tabId).toBe(openedTabId);
292 }),
293 ),
294);
295
296it.effect("announces a live replacement stream before delivering requests", () =>
297 Effect.scoped(
298 Effect.gen(function* () {
299 const broker = yield* makeBroker;
300 const events = yield* broker.connect(makeHost());
301 const receivedTypes: PreviewAutomationStreamEvent["type"][] = [];
302 const consumer = yield* events.pipe(
303 Stream.take(2),
304 Stream.runForEach((event) => {
305 receivedTypes.push(event.type);
306 return event.type === "connected"
307 ? Effect.void
308 : broker.respond({
309 clientId: "client-1",
310 connectionId: event.connectionId,
311 requestId: event.request.requestId,
312 ok: true,
313 result: "ready",
314 });
315 }),
316 Effect.forkScoped,
317 );
318 yield* Effect.yieldNow;
319
320 const result = yield* broker.invoke<string>({ scope, operation: "status", input: {} });
321 yield* Fiber.join(consumer);
322
323 expect(receivedTypes).toEqual(["connected", "request"]);
324 expect(result).toBe("ready");
325 }),
326 ),
327);
328
329it.effect(
330 "keeps a server-host open alive for installation without extending other operations",
331 () =>
332 Effect.scoped(
333 Effect.gen(function* () {
334 const broker = yield* makeBroker;
335 const received = yield* Deferred.make<RoutedRequest>();
336 const requests = requestsFrom(yield* broker.connect(makeHost(), { preferred: true }));
337 yield* Stream.runForEach(requests, (request) =>
338 request.operation === "open"
339 ? Deferred.succeed(received, request)
340 : broker.respond({
341 clientId: "client-1",
342 connectionId: request.connectionId,
343 requestId: request.requestId,
344 ok: true,
345 result: request.timeoutMs,
346 }),
347 ).pipe(Effect.forkScoped);
348 const opening = yield* broker
349 .invoke({ scope, operation: "open", input: {} })
350 .pipe(Effect.forkScoped);
351 const request = yield* Deferred.await(received);
352 yield* TestClock.adjust(16_000);
353 yield* broker.respond({
354 clientId: "client-1",
355 connectionId: request.connectionId,
356 requestId: request.requestId,
357 ok: true,
358 result: "opened",
359 });
360 expect(yield* Fiber.join(opening)).toBe("opened");
361 expect(yield* broker.invoke({ scope, operation: "status", input: {} })).toBe(15_000);
362 expect(yield* broker.invoke({ scope, operation: "navigate", input: {} })).toBe(15_000);
363 }),
364 ),
365);
366
367it.effect("preserves bounded request and remote selector diagnostics", () => {
368 const locator = "role=button[name='request-secret']";
369 const remoteMessage = "Unexpected token near remote-secret.";
370 const remoteError = {
371 _tag: "PreviewAutomationInvalidSelectorError",
372 message: remoteMessage,
373 detail: { selector: "role=button[name='remote-secret']" },
374 } as const;
375
376 return Effect.scoped(
377 Effect.gen(function* () {
378 const broker = yield* makeBroker;
379 const requests = requestsFrom(yield* broker.connect(makeHost()));
380 yield* Stream.runForEach(requests, (request) =>
381 broker.respond({
382 clientId: "client-1",
383 connectionId: request.connectionId,
384 requestId: request.requestId,
385 ok: false,
386 error: remoteError,
387 }),
388 ).pipe(Effect.forkScoped);
389 yield* Effect.yieldNow;
390
391 const error = yield* broker
392 .invoke<void>({
393 scope,
394 operation: "click",
395 input: { locator },
396 tabId: PreviewTabId.make("tab-1"),
397 timeoutMs: 1_234,
398 })
399 .pipe(Effect.flip);
400
401 expect(error).toBeInstanceOf(PreviewAutomationInvalidSelectorError);
402 expect(error).toMatchObject({
403 operation: "click",
404 environmentId: scope.environmentId,
405 threadId: scope.thread.threadId,
406 providerSessionId: scope.thread.providerSessionId,
407 providerInstanceId: scope.thread.providerInstanceId,
408 clientId: "client-1",
409 requestId: "preview-0",
410 tabId: "tab-1",
411 timeoutMs: 1_234,
412 selectorKind: "locator",
413 selectorLength: locator.length,
414 remoteTag: "PreviewAutomationInvalidSelectorError",
415 remoteMessageLength: remoteMessage.length,
416 remoteDetailKind: "object",
417 });
418 expect(error.message).toBe(
419 `Preview automation click received an invalid locator (${locator.length} characters).`,
420 );
421 expect(error.message).not.toContain("secret");
422 expect(error.cause).toBe(remoteError);
423 expect("selector" in error).toBe(false);
424 expect("remoteMessage" in error).toBe(false);
425 expect("remoteDetail" in error).toBe(false);
426 }),
427 );
428});
429
430it.effect("classifies a remote non-editable target without collapsing it to execution", () => {
431 const remoteError = {
432 _tag: "PreviewAutomationTargetNotEditableError",
433 message: "remote target details",
434 detail: { selectorKind: "focused-element" },
435 } as const;
436
437 return Effect.scoped(
438 Effect.gen(function* () {
439 const broker = yield* makeBroker;
440 const requests = requestsFrom(yield* broker.connect(makeHost()));
441 yield* Stream.runForEach(requests, (request) =>
442 broker.respond({
443 clientId: "client-1",
444 connectionId: request.connectionId,
445 requestId: request.requestId,
446 ok: false,
447 error: remoteError,
448 }),
449 ).pipe(Effect.forkScoped);
450 yield* Effect.yieldNow;
451
452 const error = yield* broker
453 .invoke<void>({
454 scope,
455 operation: "type",
456 input: { text: "hello" },
457 tabId: PreviewTabId.make("tab-1"),
458 })
459 .pipe(Effect.flip);
460
461 expect(error).toBeInstanceOf(PreviewAutomationTargetNotEditableError);
462 expect(error).toMatchObject({
463 operation: "type",
464 tabId: "tab-1",
465 selectorKind: "focused-element",
466 remoteTag: "PreviewAutomationTargetNotEditableError",
467 });
468 expect(error.message).toBe("Preview automation type requires an editable focused element.");
469 }),
470 );
471});
472
473it.effect.each([
474 "PreviewAutomationRecordingTransferError",
475 "PreviewAutomationRecordingDesktopUpdateRequiredError",
476 "PreviewAutomationRecordingTooLargeError",
477 "PreviewAutomationRecordingDeadlineExpiredError",
478] as const)("preserves recording failure %s", (tag) =>
479 Effect.scoped(
480 Effect.gen(function* () {
481 const broker = yield* makeBroker;
482 const remoteError = {
483 _tag: tag,
484 message: "remote recording details",
485 detail: { reason: "untrusted-reason", threadId: "untrusted-thread" },
486 };
487 const requests = requestsFrom(yield* broker.connect(makeHost()));
488 yield* Stream.runForEach(requests, (request) =>
489 broker.respond({
490 clientId: "client-1",
491 connectionId: request.connectionId,
492 requestId: request.requestId,
493 ok: false,
494 error: remoteError,
495 }),
496 ).pipe(Effect.forkScoped);
497 yield* Effect.yieldNow;
498 const error = yield* broker
499 .invoke<void>({
500 scope,
501 operation: "recordingStop",
502 input: {},
503 })
504 .pipe(Effect.flip);
505 expect(error).toMatchObject({
506 _tag: tag,
507 threadId: scope.thread.threadId,
508 });
509 expect(error.cause).toBe(remoteError);
510 expect(error.message).not.toContain("remote recording details");
511 }),
512 ),
513);
514
515it.effect.each([
516 { clientId: SERVER_BROWSER_AUTOMATION_CLIENT_ID, shown: true },
517 { clientId: "client-1", shown: false },
518])("tells the agent why its own server browser failed ($clientId)", ({ clientId, shown }) =>
519 Effect.scoped(
520 Effect.gen(function* () {
521 const broker = yield* makeBroker;
522 const requests = requestsFrom(yield* broker.connect(makeHost({ clientId })));
523 yield* Stream.runForEach(requests, (request) =>
524 broker.respond({
525 clientId,
526 connectionId: request.connectionId,
527 requestId: request.requestId,
528 ok: false,
529 error: {
530 _tag: "PreviewAutomationExecutionError",
531 message: "page.goto: net::ERR_CONNECTION_REFUSED at http://localhost:4719/",
532 },
533 }),
534 ).pipe(Effect.forkScoped);
535 yield* Effect.yieldNow;
536 const error = yield* broker
537 .invoke<void>({ scope, operation: "open", input: {} })
538 .pipe(Effect.flip);
539 expect(error._tag).toBe("PreviewAutomationExecutionError");
540 // A desktop or other remote host's text stays out of the agent's context.
541 expect(error.message.includes("ERR_CONNECTION_REFUSED")).toBe(shown);
542 }),
543 ),
544);
545
546it.effect("distinguishes malformed remote failures", () =>
547 Effect.scoped(
548 Effect.gen(function* () {
549 const broker = yield* makeBroker;
550 const requests = requestsFrom(yield* broker.connect(makeHost()));
551 yield* Stream.runForEach(requests, (request) =>
552 broker.respond({
553 clientId: "client-1",
554 connectionId: request.connectionId,
555 requestId: request.requestId,
556 ok: false,
557 }),
558 ).pipe(Effect.forkScoped);
559 yield* Effect.yieldNow;
560
561 const error = yield* broker
562 .invoke<void>({ scope, operation: "status", input: {}, timeoutMs: 2_000 })
563 .pipe(Effect.flip);
564
565 expect(error).toBeInstanceOf(PreviewAutomationMalformedResponseError);
566 expect(error).toMatchObject({
567 operation: "status",
568 environmentId: scope.environmentId,
569 threadId: scope.thread.threadId,
570 providerSessionId: scope.thread.providerSessionId,
571 providerInstanceId: scope.thread.providerInstanceId,
572 clientId: "client-1",
573 requestId: "preview-0",
574 timeoutMs: 2_000,
575 });
576 }),
577 ),
578);
579
580it.effect("rejects calls when no connected host exists", () =>
581 Effect.gen(function* () {
582 const broker = yield* makeBroker;
583 const error = yield* broker
584 .invoke<void>({ scope, operation: "status", input: {} })
585 .pipe(Effect.flip);
586
587 expect(error).toBeInstanceOf(PreviewAutomationNoAvailableHostError);
588 expect(error).toMatchObject({
589 operation: "status",
590 environmentId: scope.environmentId,
591 threadId: scope.thread.threadId,
592 providerSessionId: scope.thread.providerSessionId,
593 providerInstanceId: scope.thread.providerInstanceId,
594 });
595 }),
596);
597
598it.effect("does not create host state from focus updates without a live stream", () =>
599 Effect.gen(function* () {
600 const broker = yield* makeBroker;
601 yield* broker.focusHost({
602 clientId: "client-1",
603 environmentId: scope.environmentId,
604 connectionId: "connection-missing",
605 focused: true,
606 });
607
608 const error = yield* broker
609 .invoke<void>({ scope, operation: "status", input: {} })
610 .pipe(Effect.flip);
611 expect(error).toBeInstanceOf(PreviewAutomationNoAvailableHostError);
612 }),
613);
614
615it.effect("removes host availability when the authoritative request stream disconnects", () =>
616 Effect.scoped(
617 Effect.gen(function* () {
618 const broker = yield* makeBroker;
619 const requests = requestsFrom(yield* broker.connect(makeHost()));
620 const beforeAcquisition = yield* broker
621 .invoke<void>({ scope, operation: "status", input: {} })
622 .pipe(Effect.flip);
623 expect(beforeAcquisition).toBeInstanceOf(PreviewAutomationNoAvailableHostError);
624
625 const consumer = yield* Stream.runDrain(requests).pipe(Effect.forkScoped);
626 yield* Effect.yieldNow;
627 yield* Fiber.interrupt(consumer);
628
629 const error = yield* broker
630 .invoke<void>({ scope, operation: "status", input: {} })
631 .pipe(Effect.flip);
632 expect(error).toBeInstanceOf(PreviewAutomationNoAvailableHostError);
633 }),
634 ),
635);
636
637it.effect("routes requests for background threads through an environment-level host", () =>
638 Effect.scoped(
639 Effect.gen(function* () {
640 const broker = yield* makeBroker;
641 const backgroundThreadId = ThreadId.make("thread-background");
642 const requests = requestsFrom(yield* broker.connect(makeHost()));
643 let routedThreadId: string | undefined;
644 yield* Stream.runForEach(requests, (request) => {
645 routedThreadId = request.threadId;
646 return broker.respond({
647 clientId: "client-1",
648 connectionId: request.connectionId,
649 requestId: request.requestId,
650 ok: true,
651 result: "background",
652 });
653 }).pipe(Effect.forkScoped);
654 yield* Effect.yieldNow;
655
656 const result = yield* broker.invoke<string>({
657 scope: {
658 ...scope,
659 thread: {
660 ...scope.thread,
661 threadId: backgroundThreadId,
662 providerSessionId: "provider-session-background",
663 },
664 },
665 operation: "status",
666 input: {},
667 });
668
669 expect(result).toBe("background");
670 expect(routedThreadId).toBe(backgroundThreadId);
671 }),
672 ),
673);
674
675it.effect("never routes a provider session to a host from another environment", () =>
676 Effect.scoped(
677 Effect.gen(function* () {
678 const broker = yield* makeBroker;
679 const matchingRequests = requestsFrom(
680 yield* broker.connect(makeHost({ clientId: "client-matching" })),
681 );
682 const foreignRequests = requestsFrom(
683 yield* broker.connect(
684 makeHost({
685 clientId: "client-foreign",
686 environmentId: EnvironmentId.make("environment-foreign"),
687 }),
688 ),
689 );
690 yield* Stream.runForEach(matchingRequests, (request) =>
691 broker.respond({
692 clientId: "client-matching",
693 connectionId: request.connectionId,
694 requestId: request.requestId,
695 ok: true,
696 result: "matching",
697 }),
698 ).pipe(Effect.forkScoped);
699 yield* Stream.runForEach(foreignRequests, (request) =>
700 broker.respond({
701 clientId: "client-foreign",
702 connectionId: request.connectionId,
703 requestId: request.requestId,
704 ok: true,
705 result: "foreign",
706 }),
707 ).pipe(Effect.forkScoped);
708 yield* Effect.yieldNow;
709
710 expect(yield* broker.invoke<string>({ scope, operation: "status", input: {} })).toBe(
711 "matching",
712 );
713 }),
714 ),
715);
716
717it.effect("pins a provider session to its initial host despite later focus changes", () =>
718 Effect.scoped(
719 Effect.gen(function* () {
720 const broker = yield* makeBroker;
721 let firstConnectionId = "";
722 let secondConnectionId = "";
723 const firstRequests = requestsFrom(
724 yield* broker.connect(makeHost({ clientId: "client-first" })),
725 (connectionId) => {
726 firstConnectionId = connectionId;
727 },
728 );
729 const secondRequests = requestsFrom(
730 yield* broker.connect(makeHost({ clientId: "client-second" })),
731 (connectionId) => {
732 secondConnectionId = connectionId;
733 },
734 );
735 yield* Stream.runForEach(firstRequests, (request) =>
736 broker.respond({
737 clientId: "client-first",
738 connectionId: request.connectionId,
739 requestId: request.requestId,
740 ok: true,
741 result: "first",
742 }),
743 ).pipe(Effect.forkScoped);
744 yield* Stream.runForEach(secondRequests, (request) =>
745 broker.respond({
746 clientId: "client-second",
747 connectionId: request.connectionId,
748 requestId: request.requestId,
749 ok: true,
750 result: "second",
751 }),
752 ).pipe(Effect.forkScoped);
753 yield* Effect.yieldNow;
754
755 yield* broker.focusHost({
756 clientId: "client-first",
757 environmentId: scope.environmentId,
758 connectionId: "connection-stale",
759 focused: true,
760 liveTabs: [{ threadId: scope.thread.threadId, tabId: PreviewTabId.make("stale-tab") }],
761 });
762 expect(yield* broker.invoke<string>({ scope, operation: "status", input: {} })).toBe(
763 "second",
764 );
765 yield* broker.focusHost({
766 clientId: "client-first",
767 environmentId: scope.environmentId,
768 connectionId: firstConnectionId,
769 focused: true,
770 });
771
772 const firstPinnedScope = {
773 ...scope,
774 thread: { ...scope.thread, providerSessionId: "provider-session-first-pinned" },
775 };
776 expect(
777 yield* broker.invoke<string>({ scope: firstPinnedScope, operation: "status", input: {} }),
778 ).toBe("first");
779
780 yield* broker.focusHost({
781 clientId: "client-second",
782 environmentId: scope.environmentId,
783 connectionId: secondConnectionId,
784 focused: true,
785 });
786
787 expect(
788 yield* broker.invoke<string>({ scope: firstPinnedScope, operation: "status", input: {} }),
789 ).toBe("first");
790 expect(
791 yield* broker.invoke<string>({
792 scope: {
793 ...scope,
794 thread: { ...scope.thread, providerSessionId: "provider-session-second-pinned" },
795 },
796 operation: "status",
797 input: {},
798 }),
799 ).toBe("second");
800 }),
801 ),
802);
803
804it.effect("prefers the live tab owner for new sessions without moving existing leases", () =>
805 Effect.scoped(
806 Effect.gen(function* () {
807 const broker = yield* makeBroker;
808 const connections = new Map<string, string>();
809 for (const clientId of ["owner", "other"]) {
810 const requests = requestsFrom(
811 yield* broker.connect(makeHost({ clientId })),
812 (connectionId) => connections.set(clientId, connectionId),
813 );
814 yield* Stream.runForEach(requests, (request) =>
815 broker.respond({
816 clientId,
817 connectionId: request.connectionId,
818 requestId: request.requestId,
819 ok: true,
820 result: clientId,
821 }),
822 ).pipe(Effect.forkScoped);
823 }
824 yield* Effect.yieldNow;
825 yield* broker.focusHost({
826 clientId: "owner",
827 environmentId: scope.environmentId,
828 connectionId: connections.get("owner")!,
829 focused: false,
830 liveTabs: [
831 { threadId: scope.thread.threadId, tabId: PreviewTabId.make("signed-in"), visible: true },
832 ],
833 });
834 yield* broker.focusHost({
835 clientId: "other",
836 environmentId: scope.environmentId,
837 connectionId: connections.get("other")!,
838 focused: true,
839 liveTabs: [
840 {
841 threadId: scope.thread.threadId,
842 tabId: PreviewTabId.make("signed-in"),
843 visible: false,
844 },
845 {
846 threadId: ThreadId.make("another-thread"),
847 tabId: PreviewTabId.make("different-tab"),
848 visible: true,
849 },
850 ],
851 });
852 expect(yield* broker.invoke<string>({ scope, operation: "evaluate", input: {} })).toBe(
853 "owner",
854 );
855 expect(
856 yield* broker.invoke<string>({
857 scope: { ...scope, thread: { ...scope.thread, providerSessionId: "explicit-owner" } },
858 tabId: PreviewTabId.make("signed-in"),
859 operation: "snapshot",
860 input: {},
861 }),
862 ).toBe("owner");
863 expect(
864 yield* broker.invoke<string>({
865 scope: { ...scope, thread: { ...scope.thread, providerSessionId: "other-tab" } },
866 tabId: PreviewTabId.make("different-tab"),
867 operation: "evaluate",
868 input: {},
869 }),
870 ).toBe("other");
871
872 yield* broker.focusHost({
873 clientId: "owner",
874 environmentId: scope.environmentId,
875 connectionId: connections.get("owner")!,
876 focused: false,
877 liveTabs: [],
878 });
879 expect(yield* broker.invoke<string>({ scope, operation: "evaluate", input: {} })).toBe(
880 "owner",
881 );
882 expect(
883 yield* broker.invoke<string>({
884 scope: { ...scope, thread: { ...scope.thread, providerSessionId: "after-tab-closed" } },
885 operation: "evaluate",
886 input: {},
887 }),
888 ).toBe("other");
889 }),
890 ),
891);
892
893it.effect("prefers a focused host over unrelated extra capabilities for a new session", () =>
894 Effect.scoped(
895 Effect.gen(function* () {
896 const broker = yield* makeBroker;
897 let focusedConnectionId = "";
898 for (const [clientId, supportedOperations] of [
899 ["focused", ["status"]],
900 ["background", ["status", "resize"]],
901 ] as const) {
902 const requests = requestsFrom(
903 yield* broker.connect(makeHost({ clientId, supportedOperations })),
904 (connectionId) => {
905 if (clientId === "focused") focusedConnectionId = connectionId;
906 },
907 );
908 yield* Stream.runForEach(requests, (request) =>
909 broker.respond({
910 clientId,
911 connectionId: request.connectionId,
912 requestId: request.requestId,
913 ok: true,
914 result: clientId,
915 }),
916 ).pipe(Effect.forkScoped);
917 }
918 yield* Effect.yieldNow;
919 yield* broker.focusHost({
920 clientId: "focused",
921 environmentId: scope.environmentId,
922 connectionId: focusedConnectionId,
923 focused: true,
924 });
925 expect(yield* broker.invoke<string>({ scope, operation: "status", input: {} })).toBe(
926 "focused",
927 );
928 }),
929 ),
930);
931
932it.effect("does not route new operations to legacy hosts that did not advertise support", () =>
933 Effect.scoped(
934 Effect.gen(function* () {
935 const broker = yield* makeBroker;
936 const legacyEvents = yield* broker.connect(makeHost());
937 yield* Stream.runDrain(legacyEvents).pipe(Effect.forkScoped);
938 yield* Effect.yieldNow;
939
940 const error = yield* broker
941 .invoke<void>({ scope, operation: "resize", input: { mode: "fill" } })
942 .pipe(Effect.flip);
943
944 expect(error).toBeInstanceOf(PreviewAutomationNoAvailableHostError);
945 expect(error).toMatchObject({ operation: "resize", environmentId: scope.environmentId });
946 }),
947 ),
948);
949
950it.effect("routes resize to a capable host instead of a newer legacy connection", () =>
951 Effect.scoped(
952 Effect.gen(function* () {
953 const broker = yield* makeBroker;
954 const capableRequests = requestsFrom(
955 yield* broker.connect(
956 makeHost({ clientId: "client-capable", supportedOperations: ["resize"] }),
957 ),
958 );
959 const legacyRequests = requestsFrom(
960 yield* broker.connect(makeHost({ clientId: "client-legacy" })),
961 );
962 yield* Stream.runForEach(capableRequests, (request) =>
963 broker.respond({
964 clientId: "client-capable",
965 connectionId: request.connectionId,
966 requestId: request.requestId,
967 ok: true,
968 result: "capable",
969 }),
970 ).pipe(Effect.forkScoped);
971 yield* Stream.runForEach(legacyRequests, (request) =>
972 broker.respond({
973 clientId: "client-legacy",
974 connectionId: request.connectionId,
975 requestId: request.requestId,
976 ok: true,
977 result: "legacy",
978 }),
979 ).pipe(Effect.forkScoped);
980 yield* Effect.yieldNow;
981
982 expect(
983 yield* broker.invoke<string>({ scope, operation: "resize", input: { mode: "fill" } }),
984 ).toBe("capable");
985 }),
986 ),
987);
988
989it.effect("does not move a live legacy assignment to another runtime for resize", () =>
990 Effect.scoped(
991 Effect.gen(function* () {
992 const broker = yield* makeBroker;
993 const legacyRequests = requestsFrom(
994 yield* broker.connect(makeHost({ clientId: "client-legacy" })),
995 );
996 yield* Stream.runForEach(legacyRequests, (request) =>
997 broker.respond({
998 clientId: "client-legacy",
999 connectionId: request.connectionId,
1000 requestId: request.requestId,
1001 ok: true,
1002 result: "legacy",
1003 }),
1004 ).pipe(Effect.forkScoped);
1005 yield* Effect.yieldNow;
1006
1007 expect(yield* broker.invoke<string>({ scope, operation: "status", input: {} })).toBe(
1008 "legacy",
1009 );
1010
1011 const capableRequests = requestsFrom(
1012 yield* broker.connect(
1013 makeHost({ clientId: "client-capable", supportedOperations: ["resize"] }),
1014 ),
1015 );
1016 yield* Stream.runForEach(capableRequests, (request) =>
1017 broker.respond({
1018 clientId: "client-capable",
1019 connectionId: request.connectionId,
1020 requestId: request.requestId,
1021 ok: true,
1022 result: "capable",
1023 }),
1024 ).pipe(Effect.forkScoped);
1025 yield* Effect.yieldNow;
1026
1027 const error = yield* broker
1028 .invoke<void>({ scope, operation: "resize", input: { mode: "fill" } })
1029 .pipe(Effect.flip);
1030 expect(error).toBeInstanceOf(PreviewAutomationNoAvailableHostError);
1031 expect(yield* broker.invoke<string>({ scope, operation: "status", input: {} })).toBe(
1032 "legacy",
1033 );
1034 }),
1035 ),
1036);
1037
1038it.effect("ignores stale focus updates for a different environment", () =>
1039 Effect.scoped(
1040 Effect.gen(function* () {
1041 const broker = yield* makeBroker;
1042 let firstConnectionId = "";
1043 const firstRequests = requestsFrom(
1044 yield* broker.connect(makeHost({ clientId: "client-first" })),
1045 (connectionId) => {
1046 firstConnectionId = connectionId;
1047 },
1048 );
1049 const secondRequests = requestsFrom(
1050 yield* broker.connect(makeHost({ clientId: "client-second" })),
1051 );
1052 yield* Stream.runForEach(firstRequests, (request) =>
1053 broker.respond({
1054 clientId: "client-first",
1055 connectionId: request.connectionId,
1056 requestId: request.requestId,
1057 ok: true,
1058 result: "first",
1059 }),
1060 ).pipe(Effect.forkScoped);
1061 yield* Stream.runForEach(secondRequests, (request) =>
1062 broker.respond({
1063 clientId: "client-second",
1064 connectionId: request.connectionId,
1065 requestId: request.requestId,
1066 ok: true,
1067 result: "second",
1068 }),
1069 ).pipe(Effect.forkScoped);
1070 yield* Effect.yieldNow;
1071
1072 yield* broker.focusHost({
1073 clientId: "client-first",
1074 environmentId: EnvironmentId.make("environment-stale"),
1075 connectionId: firstConnectionId,
1076 focused: true,
1077 });
1078
1079 expect(yield* broker.invoke<string>({ scope, operation: "status", input: {} })).toBe(
1080 "second",
1081 );
1082 }),
1083 ),
1084);
1085
1086it.effect("fails over a pinned provider session only after its host disconnects", () =>
1087 Effect.scoped(
1088 Effect.gen(function* () {
1089 const broker = yield* makeBroker;
1090 const firstTabId = PreviewTabId.make("tab-on-first-host");
1091 let firstConnectionId = "";
1092 let secondRoutedTabId: PreviewTabId | undefined;
1093 const firstRequests = requestsFrom(
1094 yield* broker.connect(makeHost({ clientId: "client-first" })),
1095 (connectionId) => {
1096 firstConnectionId = connectionId;
1097 },
1098 );
1099 const secondRequests = requestsFrom(
1100 yield* broker.connect(makeHost({ clientId: "client-second" })),
1101 );
1102 const firstConsumer = yield* Stream.runForEach(firstRequests, (request) =>
1103 broker.respond({
1104 clientId: "client-first",
1105 connectionId: request.connectionId,
1106 requestId: request.requestId,
1107 ok: true,
1108 result: request.operation === "open" ? { host: "first", tabId: firstTabId } : "first",
1109 }),
1110 ).pipe(Effect.forkScoped);
1111 yield* Stream.runForEach(secondRequests, (request) => {
1112 secondRoutedTabId = request.tabId;
1113 return broker.respond({
1114 clientId: "client-second",
1115 connectionId: request.connectionId,
1116 requestId: request.requestId,
1117 ok: true,
1118 result: "second",
1119 });
1120 }).pipe(Effect.forkScoped);
1121 yield* Effect.yieldNow;
1122
1123 yield* broker.focusHost({
1124 clientId: "client-first",
1125 environmentId: scope.environmentId,
1126 connectionId: firstConnectionId,
1127 focused: true,
1128 liveTabs: [{ threadId: scope.thread.threadId, tabId: firstTabId }],
1129 });
1130 expect(yield* broker.invoke({ scope, operation: "open", input: {} })).toEqual({
1131 host: "first",
1132 tabId: firstTabId,
1133 });
1134
1135 yield* Fiber.interrupt(firstConsumer);
1136 yield* Effect.yieldNow;
1137
1138 expect(yield* broker.invoke<string>({ scope, operation: "status", input: {} })).toBe(
1139 "second",
1140 );
1141 expect(secondRoutedTabId).toBeUndefined();
1142 }),
1143 ),
1144);
1145
1146it.effect("lets the browser host resolve an active tab locally", () =>
1147 Effect.scoped(
1148 Effect.gen(function* () {
1149 const broker = yield* makeBroker;
1150 const requests = requestsFrom(yield* broker.connect(makeHost()));
1151 let routedTabId: string | undefined;
1152 yield* Stream.runForEach(requests, (request) => {
1153 routedTabId = request.tabId;
1154 return broker.respond({
1155 clientId: "client-1",
1156 connectionId: request.connectionId,
1157 requestId: request.requestId,
1158 ok: true,
1159 });
1160 }).pipe(Effect.forkScoped);
1161 yield* Effect.yieldNow;
1162
1163 yield* broker.invoke<void>({ scope, operation: "click", input: { x: 10, y: 10 } });
1164
1165 expect(routedTabId).toBeUndefined();
1166 }),
1167 ),
1168);
1169
1170it.effect("keeps a replacement stream authoritative when the old stream finalizes", () =>
1171 Effect.scoped(
1172 Effect.gen(function* () {
1173 const broker = yield* makeBroker;
1174 let firstConnectionId = "";
1175 let replacementConnectionId = "";
1176 const firstRequests = requestsFrom(yield* broker.connect(makeHost()), (connectionId) => {
1177 firstConnectionId = connectionId;
1178 });
1179 yield* Stream.runDrain(firstRequests).pipe(Effect.forkScoped);
1180 yield* Effect.yieldNow;
1181
1182 const replacementRequests = requestsFrom(
1183 yield* broker.connect(makeHost()),
1184 (connectionId) => {
1185 replacementConnectionId = connectionId;
1186 },
1187 );
1188 yield* Stream.runForEach(replacementRequests, (request) =>
1189 broker.respond({
1190 clientId: "client-1",
1191 connectionId: request.connectionId,
1192 requestId: request.requestId,
1193 ok: true,
1194 result: "replacement",
1195 }),
1196 ).pipe(Effect.forkScoped);
1197 yield* Effect.yieldNow;
1198
1199 expect(replacementConnectionId).not.toBe(firstConnectionId);
1200 const result = yield* broker.invoke<string>({ scope, operation: "status", input: {} });
1201 expect(result).toBe("replacement");
1202 }),
1203 ),
1204);
1205
1206it.effect("does not carry a tab id across a replacement automation stream", () =>
1207 Effect.scoped(
1208 Effect.gen(function* () {
1209 const broker = yield* makeBroker;
1210 const openedTabId = PreviewTabId.make("tab-first-webcontents");
1211 const firstRequests = requestsFrom(yield* broker.connect(makeHost()));
1212 yield* Stream.runForEach(firstRequests, (request) =>
1213 broker.respond({
1214 clientId: "client-1",
1215 connectionId: request.connectionId,
1216 requestId: request.requestId,
1217 ok: true,
1218 result:
1219 request.operation === "open"
1220 ? { host: "first", tabId: openedTabId }
1221 : { host: "first" },
1222 }),
1223 ).pipe(Effect.forkScoped);
1224 yield* Effect.yieldNow;
1225
1226 expect(yield* broker.invoke({ scope, operation: "open", input: {} })).toEqual({
1227 host: "first",
1228 tabId: openedTabId,
1229 });
1230
1231 const routedRequests: RoutedRequest[] = [];
1232 const replacementRequests = requestsFrom(yield* broker.connect(makeHost()));
1233 yield* Stream.runForEach(replacementRequests, (request) => {
1234 routedRequests.push(request);
1235 return broker.respond({
1236 clientId: "client-1",
1237 connectionId: request.connectionId,
1238 requestId: request.requestId,
1239 ok: true,
1240 result: "replacement",
1241 });
1242 }).pipe(Effect.forkScoped);
1243 yield* Effect.yieldNow;
1244
1245 expect(yield* broker.invoke<string>({ scope, operation: "status", input: {} })).toBe(
1246 "replacement",
1247 );
1248 expect(routedRequests.at(-1)?.tabId).toBeUndefined();
1249 }),
1250 ),
1251);
1252
1253it.effect("fails requests assigned to the stream that is replaced", () =>
1254 Effect.scoped(
1255 Effect.gen(function* () {
1256 const broker = yield* makeBroker;
1257 const requests = requestsFrom(yield* broker.connect(makeHost()));
1258 yield* Stream.runDrain(requests).pipe(Effect.forkScoped);
1259 const pending = yield* broker
1260 .invoke<void>({ scope, operation: "status", input: {} })
1261 .pipe(Effect.flip, Effect.forkScoped);
1262 yield* Effect.yieldNow;
1263
1264 const replacementRequests = requestsFrom(yield* broker.connect(makeHost()));
1265 yield* Stream.runDrain(replacementRequests).pipe(Effect.forkScoped);
1266
1267 const error = yield* Fiber.join(pending);
1268 expect(error).toBeInstanceOf(PreviewAutomationClientDisconnectedError);
1269 expect(error).toMatchObject({
1270 operation: "status",
1271 environmentId: scope.environmentId,
1272 threadId: scope.thread.threadId,
1273 providerSessionId: scope.thread.providerSessionId,
1274 providerInstanceId: scope.thread.providerInstanceId,
1275 clientId: "client-1",
1276 requestId: "preview-0",
1277 timeoutMs: 15_000,
1278 });
1279 }),
1280 ),
1281);
1282
1283it.effect("accepts responses only from the host that received the request", () =>
1284 Effect.scoped(
1285 Effect.gen(function* () {
1286 const broker = yield* makeBroker;
1287 const requests = requestsFrom(yield* broker.connect(makeHost()));
1288 yield* Stream.runForEach(requests, (request) =>
1289 Effect.gen(function* () {
1290 yield* broker.respond({
1291 clientId: "client-foreign",
1292 connectionId: request.connectionId,
1293 requestId: request.requestId,
1294 ok: true,
1295 result: "foreign",
1296 });
1297 yield* broker.respond({
1298 clientId: "client-1",
1299 connectionId: "connection-stale",
1300 requestId: request.requestId,
1301 ok: true,
1302 result: "stale",
1303 });
1304 yield* broker.respond({
1305 clientId: "client-1",
1306 connectionId: request.connectionId,
1307 requestId: request.requestId,
1308 ok: true,
1309 result: "owner",
1310 });
1311 }),
1312 ).pipe(Effect.forkScoped);
1313 yield* Effect.yieldNow;
1314
1315 const result = yield* broker.invoke<string>({ scope, operation: "status", input: {} });
1316 expect(result).toBe("owner");
1317 }),
1318 ),
1319);
1320
1321it.effect("discards buffered actions before completing an evicted host stream", () =>
1322 Effect.scoped(
1323 Effect.gen(function* () {
1324 const broker = yield* makeBroker;
1325 const connected = yield* Deferred.make<void>();
1326 const received = yield* Deferred.make<void>();
1327 const actionRouted = yield* Deferred.make<void>();
1328 const releaseConsumer = yield* Deferred.make<void>();
1329 const operations: string[] = [];
1330 const consumer = yield* Stream.runForEach(yield* broker.connect(makeHost()), (event) => {
1331 if (event.type === "connected") return Deferred.succeed(connected, undefined);
1332 operations.push(event.request.operation);
1333 return Deferred.succeed(received, undefined).pipe(
1334 Effect.andThen(Deferred.await(releaseConsumer)),
1335 );
1336 }).pipe(Effect.forkScoped);
1337 yield* Deferred.await(connected);
1338 const timedOut = yield* broker
1339 .invoke<void>({ scope, operation: "snapshot", input: {}, timeoutMs: 1_000 })
1340 .pipe(Effect.flip, Effect.forkScoped);
1341 yield* Deferred.await(received);
1342 const buffered = yield* broker
1343 .invoke<void>({
1344 scope,
1345 operation: "click",
1346 input: {},
1347 timeoutMs: 10_000,
1348 onTargetTab: () => {
1349 Deferred.doneUnsafe(actionRouted, Effect.void);
1350 },
1351 })
1352 .pipe(Effect.flip, Effect.forkScoped);
1353 yield* Deferred.await(actionRouted);
1354 yield* TestClock.adjust(2_000);
1355 expect(yield* Fiber.join(timedOut)).toMatchObject({ _tag: "PreviewAutomationTimeoutError" });
1356 expect(yield* Fiber.join(buffered)).toMatchObject({
1357 _tag: "PreviewAutomationClientDisconnectedError",
1358 });
1359 yield* Deferred.succeed(releaseConsumer, undefined);
1360 expect(Exit.isSuccess(yield* Fiber.await(consumer))).toBe(true);
1361 expect(operations).toEqual(["snapshot"]);
1362 }),
1363 ),
1364);
1365
1366it.effect("rejects a routed action when its generation is evicted before delivery", () =>
1367 Effect.scoped(
1368 Effect.gen(function* () {
1369 const broker = yield* makeBroker;
1370 const connected = yield* Deferred.make<void>();
1371 const received = yield* Deferred.make<void>();
1372 const actionRouted = yield* Deferred.make<void>();
1373 const operations: string[] = [];
1374 const consumer = yield* Stream.runForEach(yield* broker.connect(makeHost()), (event) => {
1375 if (event.type === "connected") return Deferred.succeed(connected, undefined);
1376 operations.push(event.request.operation);
1377 return Deferred.succeed(received, undefined);
1378 }).pipe(Effect.forkScoped);
1379 yield* Deferred.await(connected);
1380 const timedOut = yield* broker
1381 .invoke<void>({ scope, operation: "snapshot", input: {}, timeoutMs: 1_000 })
1382 .pipe(Effect.flip, Effect.forkScoped);
1383 yield* Deferred.await(received);
1384
1385 // Suspend only this invocation in the gap between route selection and delivery.
1386 const tasks: Array<() => void> = [];
1387 let paused = false;
1388 const dispatcher: Scheduler.SchedulerDispatcher = {
1389 scheduleTask: (task) => tasks.push(task),
1390 flush: () => {
1391 let task: (() => void) | undefined;
1392 while ((task = tasks.shift()) !== undefined) task();
1393 },
1394 };
1395 const scheduler: Scheduler.Scheduler = {
1396 executionMode: "async",
1397 makeDispatcher: () => dispatcher,
1398 shouldYield: () => paused,
1399 };
1400 const action = yield* broker
1401 .invoke<void>({
1402 scope,
1403 operation: "click",
1404 input: {},
1405 onTargetTab: () => {
1406 paused = true;
1407 Deferred.doneUnsafe(actionRouted, Effect.void);
1408 },
1409 })
1410 .pipe(
1411 Effect.flip,
1412 Effect.provideService(Scheduler.Scheduler, scheduler),
1413 Effect.forkScoped,
1414 );
1415 yield* Deferred.await(actionRouted);
1416 yield* TestClock.adjust(2_000);
1417 expect(yield* Fiber.join(timedOut)).toMatchObject({ _tag: "PreviewAutomationTimeoutError" });
1418 expect(Exit.isSuccess(yield* Fiber.await(consumer))).toBe(true);
1419
1420 paused = false;
1421 dispatcher.flush();
1422 expect(yield* Fiber.join(action)).toMatchObject({
1423 _tag: "PreviewAutomationClientDisconnectedError",
1424 });
1425 expect(operations).toEqual(["snapshot"]);
1426 }),
1427 ),
1428);
1429
1430it.effect("keeps a host whose operation timeout arrives just after the budget", () =>
1431 Effect.scoped(
1432 Effect.gen(function* () {
1433 const broker = yield* makeBroker;
1434 const received = yield* Deferred.make<void>();
1435 const requests = requestsFrom(yield* broker.connect(makeHost()));
1436 yield* Stream.runForEach(requests, (request) =>
1437 Effect.gen(function* () {
1438 if (request.operation === "waitFor") {
1439 yield* Deferred.succeed(received, undefined);
1440 // The browser starts its own timer after delivery, so its timeout lands late.
1441 yield* Effect.sleep(request.timeoutMs + 50);
1442 }
1443 yield* broker.respond({
1444 clientId: "client-1",
1445 connectionId: request.connectionId,
1446 requestId: request.requestId,
1447 ...(request.operation === "waitFor"
1448 ? {
1449 ok: false,
1450 error: { _tag: "PreviewAutomationTimeoutError", message: "Selector timed out" },
1451 }
1452 : { ok: true, result: "responsive" }),
1453 });
1454 }),
1455 ).pipe(Effect.forkScoped);
1456 const timedOut = yield* broker
1457 .invoke<void>({ scope, operation: "waitFor", input: {}, timeoutMs: 1_000 })
1458 .pipe(Effect.flip, Effect.forkScoped);
1459 yield* Deferred.await(received);
1460 yield* TestClock.adjust(1_050);
1461 expect(yield* Fiber.join(timedOut)).toMatchObject({
1462 _tag: "PreviewAutomationTimeoutError",
1463 remoteTag: "PreviewAutomationTimeoutError",
1464 });
1465 expect(yield* broker.invoke({ scope, operation: "status", input: {} })).toBe("responsive");
1466 }),
1467 ),
1468);
1469
1470it.effect("keeps the host connected when a background status read times out", () =>
1471 Effect.scoped(
1472 Effect.gen(function* () {
1473 const broker = yield* makeBroker;
1474 const requests = requestsFrom(yield* broker.connect(makeHost()));
1475 // A busy host answers its actions but not the metadata read behind them.
1476 yield* Stream.runForEach(requests, (request) =>
1477 request.operation === "status"
1478 ? Effect.void
1479 : broker.respond({
1480 clientId: "client-1",
1481 connectionId: request.connectionId,
1482 requestId: request.requestId,
1483 ok: true,
1484 result: { operation: request.operation },
1485 }),
1486 ).pipe(Effect.forkScoped);
1487 yield* Effect.yieldNow;
1488
1489 const status = yield* broker
1490 .invoke<void>({
1491 scope,
1492 operation: "status",
1493 input: {},
1494 timeoutMs: 500,
1495 updateCurrentTab: false,
1496 })
1497 .pipe(Effect.flip, Effect.forkScoped);
1498 yield* TestClock.adjust(500);
1499 expect(yield* Fiber.join(status)).toMatchObject({ _tag: "PreviewAutomationTimeoutError" });
1500
1501 expect(yield* broker.invoke({ scope, operation: "snapshot", input: {} })).toEqual({
1502 operation: "snapshot",
1503 });
1504 }),
1505 ),
1506);