@johngw/stream/test/transformers/timeout.test.ts

Reactive programming tools using the WHATWG Streams API.

import { fromTimeline } from '@johngw/stream-jest'
import { timeout } from '@johngw/stream/transformers/timeout'
import { write } from '@johngw/stream/sinks/write'

test('makes sure that events are emitted within a number of milliseconds', async () => {
  await expect(
    fromTimeline(`
      -T500-1-|
    `)
      .pipeThrough(timeout(10))
      .pipeTo(write())
  ).rejects.toThrow('Exceeded 10ms')

  await expect(
    fromTimeline(`
    -T5-1-T5-2-|
    `).pipeThrough(timeout(500))
  ).toMatchTimeline(`
    ----1----2--
  `)
})