std@0.139.0/async/delay_test.ts

Deno standard library
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delay_test.ts
// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.import { delay } from "./delay.ts";import { assert, assertRejects } from "../testing/asserts.ts";
Deno.test("[async] delay", async function () { const start = new Date(); const delayedPromise = delay(100); const result = await delayedPromise; const diff = new Date().getTime() - start.getTime(); assert(result === undefined); assert(diff >= 100);});
Deno.test("[async] delay with abort", async function () { const start = new Date(); const abort = new AbortController(); const { signal } = abort; const delayedPromise = delay(100, { signal }); setTimeout(() => abort.abort(), 0); await assertRejects( () => delayedPromise, DOMException, "Delay was aborted", );
const diff = new Date().getTime() - start.getTime(); assert(diff < 100);});
Deno.test("[async] delay with non-aborted signal", async function () { const start = new Date(); const abort = new AbortController(); const { signal } = abort; const delayedPromise = delay(100, { signal }); // abort.abort() const result = await delayedPromise; const diff = new Date().getTime() - start.getTime(); assert(result === undefined); assert(diff >= 100);});
Deno.test("[async] delay with signal aborted after delay", async function () { const start = new Date(); const abort = new AbortController(); const { signal } = abort; const delayedPromise = delay(100, { signal }); const result = await delayedPromise; abort.abort(); const diff = new Date().getTime() - start.getTime(); assert(result === undefined); assert(diff >= 100);});
Deno.test("[async] delay with already aborted signal", async function () { const start = new Date(); const abort = new AbortController(); abort.abort(); const { signal } = abort; const delayedPromise = delay(100, { signal }); await assertRejects( () => delayedPromise, DOMException, "Delay was aborted", );
const diff = new Date().getTime() - start.getTime(); assert(diff < 100);});