Mock window.confirm in Jest

window.confirm.js

describe('mocking window.confirm', () => {
  // mock window.confirm
  let windowSpy;
  beforeEach(() => {
    windowSpy = jest.spyOn(global, 'window', 'get');
    windowSpy.mockImplementation(() => ({
      confirm: () => {},
    }));
  });
  afterEach(() => {
    windowSpy.mockRestore();
  });

  it('show confirm when clicking delete card button', () => {
    // @TODO do the action that uses window.confirm here.
    expect(windowSpy).toHaveBeenCalled();
  });
});