text: test("basic functionality", () => {
      var d = new Date();
      expect(d.getUTCDay()).toBe(d.getUTCDay());
      expect(d.getUTCDay()).not.toBeNaN();
      expect(d.getUTCDay()).toBeGreaterThanOrEqual(0);
      expect(d.getUTCDay()).toBeLessThanOrEqual(6);
      expect(new Date(NaN).getUTCDay()).toBe(NaN);
  });
  