anchor.diff:        expectDate(subject.yearsAgo(2013), 0, 1, 1);
       });
   
  -    test("should return time years from now on the same date", () {
  +    test('should return time years from now on the same date', () {
         expectDate(subject.yearsFromNow(1), 2014, 1, 1);
         expectDate(subject.yearsFromNow(2), 2015, 1, 1);
         expectDate(subject.yearsFromNow(3), 2016, 1, 1);
  
positive.code:       expect(fixedClock.now(), new DateTime(2014));
      });
  
      test("should return fixed time", () {
        expect(new Clock.fixed(new DateTime(2013)).now(), new DateTime(2013));
      });
  
      test("should return time Duration ago", () {
        expect(subject.agoBy(new Duration(days: 366)), new DateTime(2012));
      });
  
      test("should return time Duration from now", () {
        expect(subject.fromNowBy(new Duration(days: 365)), new DateTime(2014));
      });
  
      test("should return time parts ago", () {
        expect(subject.ago(
            days: 1,
            hours: 1,
  
negative.code:           microseconds: 1000), new DateTime(2012, 12, 30, 22, 58, 58, 998));
      });
  
      test('should return time parts from now', () {
        expect(subject.fromNow(
            days: 1,
            hours: 1,
  