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79b3bc05d6
* establish basic event loop for workers * make "self.close()" inside worker * remove "runWorkerMessageLoop() - instead manually call global function in Rust when message arrives. This is done in preparation for structured clone * refactor "WorkerChannel" and use distinct structs for internal and external channels; "WorkerChannelsInternal" and "WorkerHandle" * move "State.worker_channels_internal" to "Worker.internal_channels" * add "WorkerEvent" enum for child->host communication; currently "Message(Buf)" and "Error(ErrBox)" variants are supported * add tests for nested workers * add tests for worker throwing error on startup
84 lines
2.3 KiB
TypeScript
84 lines
2.3 KiB
TypeScript
// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
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import { test, assert, assertEquals } from "./test_util.ts";
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export interface ResolvableMethods<T> {
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resolve: (value?: T | PromiseLike<T>) => void;
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// eslint-disable-next-line @typescript-eslint/no-explicit-any
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reject: (reason?: any) => void;
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}
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export type Resolvable<T> = Promise<T> & ResolvableMethods<T>;
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export function createResolvable<T>(): Resolvable<T> {
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let methods: ResolvableMethods<T>;
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const promise = new Promise<T>((resolve, reject): void => {
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methods = { resolve, reject };
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});
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// TypeScript doesn't know that the Promise callback occurs synchronously
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// therefore use of not null assertion (`!`)
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return Object.assign(promise, methods!) as Resolvable<T>;
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}
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test(async function workersBasic(): Promise<void> {
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const promise = createResolvable();
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const jsWorker = new Worker("../tests/subdir/test_worker.js", {
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type: "module",
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name: "jsWorker"
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});
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const tsWorker = new Worker("../tests/subdir/test_worker.ts", {
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type: "module",
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name: "tsWorker"
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});
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tsWorker.onmessage = (e): void => {
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assertEquals(e.data, "Hello World");
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promise.resolve();
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};
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jsWorker.onmessage = (e): void => {
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assertEquals(e.data, "Hello World");
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tsWorker.postMessage("Hello World");
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};
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jsWorker.onerror = (e: Event): void => {
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e.preventDefault();
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jsWorker.postMessage("Hello World");
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};
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jsWorker.postMessage("Hello World");
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await promise;
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});
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test(async function nestedWorker(): Promise<void> {
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const promise = createResolvable();
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const nestedWorker = new Worker("../tests/subdir/nested_worker.js", {
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type: "module",
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name: "nested"
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});
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nestedWorker.onmessage = (e): void => {
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assert(e.data.type !== "error");
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promise.resolve();
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};
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nestedWorker.postMessage("Hello World");
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await promise;
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});
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test(async function workerThrowsWhenExecuting(): Promise<void> {
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const promise = createResolvable();
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const throwingWorker = new Worker("../tests/subdir/throwing_worker.js", {
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type: "module"
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});
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// eslint-disable-next-line @typescript-eslint/no-explicit-any
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throwingWorker.onerror = (e: any): void => {
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e.preventDefault();
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assertEquals(e.message, "Uncaught Error: Thrown error");
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promise.resolve();
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};
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await promise;
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});
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