video-ad-sdk/src/adUnit/helpers/metrics/handlers/__tests__/onRewind.spec.ts

VAST/VPAID SDK that allows video ads to be played on top of any player

import {linearEvents} from '../../../../../tracker'
import {onRewind} from '../onRewind'

const {rewind} = linearEvents
let videoElement: HTMLVideoElement

beforeEach(() => {
  videoElement = document.createElement('video')
  Object.defineProperty(videoElement, 'duration', {
    value: 100,
    writable: true
  })
  Object.defineProperty(videoElement, 'currentTime', {
    value: 0,
    writable: true
  })
})

afterEach(() => {
  ;(videoElement as any) = null
})

test('onRewind must call the callback with rewind when there is a rewind of the current video', () => {
  const callback = jest.fn()
  const disconnect = onRewind({videoElement} as any, callback)

  videoElement.currentTime = 10
  videoElement.dispatchEvent(new Event('timeupdate'))
  expect(callback).toHaveBeenCalledTimes(0)

  videoElement.currentTime = 25
  videoElement.dispatchEvent(new Event('timeupdate'))
  expect(callback).toHaveBeenCalledTimes(0)

  videoElement.currentTime = 24.5
  videoElement.dispatchEvent(new Event('timeupdate'))
  expect(callback).toHaveBeenCalledTimes(0)

  videoElement.currentTime = 15
  videoElement.dispatchEvent(new Event('timeupdate'))
  expect(callback).toHaveBeenCalledTimes(1)
  expect(callback).toHaveBeenCalledWith(rewind)
  callback.mockClear()

  disconnect()

  videoElement.currentTime = 50
  videoElement.dispatchEvent(new Event('timeupdate'))
  videoElement.currentTime = 25
  videoElement.dispatchEvent(new Event('timeupdate'))
  videoElement.currentTime = 10

  expect(callback).toHaveBeenCalledTimes(0)
})