jest和new Date()的测试

test('new Date() should return the current date and time', () => {
  const currentDate = new Date();
  expect(currentDate).toBeInstanceOf(Date);
});

test('new Date() should create a date object with specified date and time', () => {
  const specificDate = new Date('2022-01-01T00:00:00');
  expect(specificDate.getFullYear()).toBe(2022);
  expect(specificDate.getMonth()).toBe(0);
  expect(specificDate.getDate()).toBe(1);
  expect(specificDate.getHours()).toBe(0);
  expect(specificDate.getMinutes()).toBe(0);
  expect(specificDate.getSeconds()).toBe(0);
});

test('new Date() should create a date object with current date and time when no parameters are provided', () => {
  const currentDate = new Date();
  const expectedYear = new Date().getFullYear();
  expect(currentDate.getFullYear()).toBe(expectedYear);
});