1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
|
// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
import { test, assert, assertEquals } from "./test_util.ts";
export interface ResolvableMethods<T> {
resolve: (value?: T | PromiseLike<T>) => void;
// eslint-disable-next-line @typescript-eslint/no-explicit-any
reject: (reason?: any) => void;
}
export type Resolvable<T> = Promise<T> & ResolvableMethods<T>;
export function createResolvable<T>(): Resolvable<T> {
let methods: ResolvableMethods<T>;
const promise = new Promise<T>((resolve, reject): void => {
methods = { resolve, reject };
});
// TypeScript doesn't know that the Promise callback occurs synchronously
// therefore use of not null assertion (`!`)
return Object.assign(promise, methods!) as Resolvable<T>;
}
test(async function workersBasic(): Promise<void> {
const promise = createResolvable();
const jsWorker = new Worker("../tests/subdir/test_worker.js", {
type: "module",
name: "jsWorker"
});
const tsWorker = new Worker("../tests/subdir/test_worker.ts", {
type: "module",
name: "tsWorker"
});
tsWorker.onmessage = (e): void => {
assertEquals(e.data, "Hello World");
promise.resolve();
};
jsWorker.onmessage = (e): void => {
assertEquals(e.data, "Hello World");
tsWorker.postMessage("Hello World");
};
jsWorker.onerror = (e: Event): void => {
e.preventDefault();
jsWorker.postMessage("Hello World");
};
jsWorker.postMessage("Hello World");
await promise;
});
test(async function nestedWorker(): Promise<void> {
const promise = createResolvable();
const nestedWorker = new Worker("../tests/subdir/nested_worker.js", {
type: "module",
name: "nested"
});
nestedWorker.onmessage = (e): void => {
assert(e.data.type !== "error");
promise.resolve();
};
nestedWorker.postMessage("Hello World");
await promise;
});
test(async function workerThrowsWhenExecuting(): Promise<void> {
const promise = createResolvable();
const throwingWorker = new Worker("../tests/subdir/throwing_worker.js", {
type: "module"
});
// eslint-disable-next-line @typescript-eslint/no-explicit-any
throwingWorker.onerror = (e: any): void => {
e.preventDefault();
assertEquals(e.message, "Uncaught Error: Thrown error");
promise.resolve();
};
await promise;
});
|
