anchor.diff:        expect(fixedClock.now(), new DateTime(2014));
       });
   
  -    test("should return fixed time", () {
  +    test('should return fixed time', () {
         expect(new Clock.fixed(new DateTime(2013)).now(), new DateTime(2013));
       });
   
  -    test("should return time Duration ago", () {
  +    test('should return time Duration ago', () {
         expect(subject.agoBy(new Duration(days: 366)), new DateTime(2012));
       });
   
  -    test("should return time Duration from now", () {
  +    test('should return time Duration from now', () {
         expect(subject.fromNowBy(new Duration(days: 365)), new DateTime(2014));
       });
   
  -    test("should return time parts ago", () {
  +    test('should return time parts ago', () {
         expect(subject.ago(
             days: 1,
             hours: 1,
  
positive.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,
  
negative.code: // Copyright 2013 Google Inc. All Rights Reserved.
  //
  // Licensed under the Apache License, Version 2.0 (the 'License');
  // you may not use this file except in compliance with the License.
  // You may obtain a copy of the License at
  //
  //     http://www.apache.org/licenses/LICENSE-2.0
  //
  // Unless required by applicable law or agreed to in writing, software
  // distributed under the License is distributed on an 'AS IS' BASIS,
  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  // See the License for the specific language governing permissions and
  // limitations under the License.
  