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

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

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

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

  videoElement.currentTime = 1
  videoElement.dispatchEvent(new Event('timeupdate'))
  expect(callback).toHaveBeenCalledTimes(2)
  expect(callback).toHaveBeenCalledWith(impression)
  expect(callback).toHaveBeenCalledWith(creativeView)
  callback.mockClear()

  videoElement.currentTime = 1.5
  videoElement.dispatchEvent(new Event('timeupdate'))

  videoElement.currentTime = 2
  videoElement.dispatchEvent(new Event('timeupdate'))

  videoElement.currentTime = 2.5
  videoElement.dispatchEvent(new Event('timeupdate'))
  expect(callback).toHaveBeenCalledTimes(0)
  disconnect()

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

  expect(callback).toHaveBeenCalledTimes(0)
})