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
import { delay } from './delay.js'import { pipedAsync } from './pipedAsync.js'import { tapAsync } from './tapAsync.js'
test('happy', async () => {  const result = await tapAsync(delay, 1)  expect(result).toBe(1)})
test('complex', async () => {  let marker = false  const fn = () => marker = true  const result = await pipedAsync(    1,    async x => {      await delay(100)
      return x + 1    },    tapAsync(fn),    x => x + 1  )  expect(marker).toBeTrue()  expect(result).toBe(3)})