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denoland-deno/tests/unit_node/events_test.ts

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TypeScript

// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
import events, { addAbortListener, EventEmitter } from "node:events";
EventEmitter.captureRejections = true;
Deno.test("regression #20441", async () => {
const { promise, resolve } = Promise.withResolvers<void>();
const ee = new EventEmitter();
ee.on("foo", function () {
const p = new Promise((_resolve, reject) => {
setTimeout(() => {
reject();
}, 100);
});
return p;
});
ee.on("error", function (_) {
resolve();
});
ee.emit("foo");
await promise;
});
Deno.test("eventemitter async resource", () => {
// @ts-ignore: @types/node is outdated
class Foo extends events.EventEmitterAsyncResource {}
const foo = new Foo();
// @ts-ignore: @types/node is outdated
foo.emit("bar");
});
Deno.test("addAbortListener", async () => {
const { promise, resolve } = Promise.withResolvers<void>();
const abortController = new AbortController();
addAbortListener(abortController.signal, () => {
resolve();
});
abortController.abort();
await promise;
});