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34 lines
852 B
TypeScript
34 lines
852 B
TypeScript
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// Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.
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// NOTE: these are just sometests to test the TypeScript types. Real coverage is
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// provided by WPT.
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import {
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assert,
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assertEquals,
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} from "../../../test_util/std/testing/asserts.ts";
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import { deferred } from "../../../test_util/std/async/deferred.ts";
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Deno.test("messagechannel", async () => {
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const mc = new MessageChannel();
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const mc2 = new MessageChannel();
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assert(mc.port1);
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assert(mc.port2);
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const promise = deferred();
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mc.port2.onmessage = (e) => {
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assertEquals(e.data, "hello");
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assertEquals(e.ports.length, 1);
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assert(e.ports[0] instanceof MessagePort);
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e.ports[0].close();
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promise.resolve();
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};
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mc.port1.postMessage("hello", [mc2.port1]);
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mc.port1.close();
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await promise;
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mc.port2.close();
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mc2.port2.close();
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});
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