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
|
/**
* remove-me @jest-environment jsdom
*/
/// <reference lib="dom" />
import { MicroTaskScheduler } from './task-scheduler';
/*
* We're skipping this test due to JSDOM issue:
* https://github.com/jsdom/jsdom/issues/2961
*
* It should pass on Node >= 12.0, but since the core library
* is expected to run on Node >= 10.0, and this test only applies
* to the demo project, it's better disabling it for now than
* getting false negatives.
*
* When this test is eventually re-enabled, don't forget to remove
* the `remove-me` text at the top of this file to re-enable the
* loading of jsdom.
*/
// eslint-disable-next-line jest/no-disabled-tests
describe.skip('task-scheduler', () => {
let taskScheduler: MicroTaskScheduler;
let task: jest.Mock;
beforeEach(() => {
taskScheduler = new MicroTaskScheduler();
task = jest.fn();
});
it('should execute task', async () => {
taskScheduler.start();
taskScheduler.postTask(task);
await new Promise((resolve) => setTimeout(resolve, 0));
expect(task).toHaveBeenCalledTimes(1);
});
it('should execute task twice when posted twice', async () => {
taskScheduler.start();
taskScheduler.postTask(task);
taskScheduler.postTask(task);
await new Promise((resolve) => setTimeout(resolve, 0));
expect(task).toHaveBeenCalledTimes(2);
});
it('should not execute task when not started', async () => {
taskScheduler.postTask(task);
await new Promise((resolve) => setTimeout(resolve, 0));
expect(task).not.toHaveBeenCalled();
});
it('should not execute task when stopped', async () => {
taskScheduler.start();
taskScheduler.stop();
taskScheduler.postTask(task);
await new Promise((resolve) => setTimeout(resolve, 0));
expect(task).not.toHaveBeenCalled();
});
it('should not register listener twice', async () => {
const addEventListenerSpy = jest.spyOn(window, 'addEventListener');
taskScheduler.start();
taskScheduler.start();
expect(addEventListenerSpy).toHaveBeenCalledTimes(1);
});
});
|
