video-ad-sdk/src/vastRequest/helpers/__tests__/fetch.spec.ts

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

import {fetch} from '../fetch'

test("fetch must add credentials 'include' to the request options", async () => {
  const successResponse = new Response(null, {status: 200})

  global.fetch = jest.fn(() => Promise.resolve(successResponse))

  const response = await fetch('http://example.com')

  expect(global.fetch).toHaveBeenCalledWith(
    'http://example.com',
    expect.objectContaining({credentials: 'include'})
  )
  expect(response).toEqual(successResponse)
})

test("fetch must throw an error if the response's status is above 399", async () => {
  const forbiddenResponse = new Response(null, {
    status: 403,
    statusText: 'forbidden request'
  })

  global.fetch = jest.fn(() => Promise.resolve(forbiddenResponse))

  try {
    await fetch('http://example.com')

    throw new Error('should have thrown already')
  } catch (error: any) {
    expect(error.message).toBe(forbiddenResponse.statusText)
    expect(error.response).toEqual(forbiddenResponse)
  }
})