| 1 | import assert from "node:assert/strict"; |
| 2 | import { test } from "node:test"; |
| 3 | import { CaptureQueue, abortable } from "./captureQueue.js"; |
| 4 | |
| 5 | test("an already-cancelled wait still consumes the underlying promise rejection", async () => { |
| 6 | const controller = new AbortController(); controller.abort(); |
| 7 | let reject!: (reason: Error) => void; |
| 8 | const work = new Promise<void>((_resolve, fail) => { reject = fail; }); |
| 9 | await assert.rejects(abortable(work, controller.signal), /cancelled/); |
| 10 | reject(new Error("late page evaluation failure")); |
| 11 | await new Promise<void>(resolve => setImmediate(resolve)); |
| 12 | }); |
| 13 | |
| 14 | test("cancelled middle waiter cannot release an earlier capture or unblock its successor", async () => { |
| 15 | const queue = new CaptureQueue(); |
| 16 | let finish!: () => void; |
| 17 | const first = queue.run(new AbortController().signal, () => new Promise<void>(resolve => { finish = resolve; })); |
| 18 | await Promise.resolve(); |
| 19 | const controller = new AbortController(); |
| 20 | const second = queue.run(controller.signal, async () => assert.fail("cancelled waiter ran")); |
| 21 | let thirdEntered = false; |
| 22 | const third = queue.run(new AbortController().signal, async () => { thirdEntered = true; }); |
| 23 | controller.abort(); |
| 24 | await assert.rejects(second, /cancelled/); |
| 25 | assert.equal(thirdEntered, false); |
| 26 | finish(); |
| 27 | await Promise.all([first, third]); |
| 28 | assert.equal(thirdEntered, true); |
| 29 | }); |
| 30 | |
| 31 | test("failure releases its slot exactly once", async () => { |
| 32 | const queue = new CaptureQueue(); |
| 33 | await assert.rejects(queue.run(new AbortController().signal, async () => { throw new Error("probe failed"); }), /probe failed/); |
| 34 | assert.equal(await queue.run(new AbortController().signal, async () => 42), 42); |
| 35 | }); |
| 36 |