jest-mock-date.ts

jest-mock-date.ts

describe('jest mock date example', () => {
  let realDateInstance = Date

  beforeAll(() => {
    const mockedDate = new Date('2016-12-14T02:00:00.000Z')
    global.Date = class extends Date {
      constructor (date) {
        if (date) {
          return super(date)
        }
        return mockedDate
      }
    }
    console.log(new Date())
  })

  afterAll(() => {
    global.Date = realDateInstance
  })

  it('should mock a date', () => {
    console.log(new Date())
  })
})