awesome-coding-javascript/src/javascript/throttle/throttle.test.js at master · caiyongmin/awesome-coding-javascript · GitHub

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
import throttle from './throttle';
import sleep from './../../shared/sleep';

describe('throttle', () => {
  it('when less than interval, will throttle', async () => {
    let count = 0;
    const addCount = () => {
      count += 1;
    };

    const timer = setInterval(throttle(addCount, 400), 200);
    /**
     * 400 -> 1
     * 800 -> 2
     */
    setTimeout(() => {
      clearInterval(timer);
    }, 1000);
    await sleep(1500);
    expect(count).toBe(2);
  });

  it('when greate than interval, normally call', async () => {
    let count = 0;
    const addCount = () => {
      count += 1;
    };

    const timer = setInterval(throttle(addCount, 200), 300);
    /**
     * 300 -> 1
     * 600 -> 2
     * 900 -> 3
     */
    setTimeout(() => {
      clearInterval(timer);
    }, 1000);
    await sleep(1500);
    expect(count).toBe(3);
  });
});