JavaScript Mock a date in jest not working in different environment mock date jest,mock new date jest,mock date.now

So I trying to Mock a date in my test, this is what I did :

const mockDate = new Date('2018-01-01');
const backupDate = Date;

beforeEach(() => {
  (global.Date as any) = jest.fn(() => mockDate);
})

afterEach(() => {
  (global.Date as any) = backupDate;
  jest.clearAllMocks();
});



const backupDate = Date;
(global.Date as any) = jest.fn(() => mockDate);
expect(myModule).toMatchSnapshot();
(global.Date as any) = jest.fn(() => backupDate);

So this test in my local works fine and it's match with my snapshots :

exports[`should match with date`] = `
[MockFunction] {
  "calls": Array [
    Array [
      Object {
           "myDate" : "Mon Jan 01 2018 01:00:00 GMT+0100 (Central European Standard Time)"
}]]}

but in production environment I getting this instead which cause failing the test : Mon Jan 01 2018 01:00:00 GMT+0100 (CET)

Any idea what is wrong?

Answer:1

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