anchor.diff:              expect(errors.first, new isInstanceOf<TimeoutException>());
               return controller.close();
             });
  -
  -        });
  -
  -      });
  -
  +        });
  +      });
       });
  -
     });
  -
   }
  
positive.code:             controller.add(null);
              async.elapse(const Duration(minutes: 1));
              return ret;
            });
          });
  
          test('should increase negative duration timers to zero duration', () {
  
negative.code:         });
  
          test('should add event before advancing time', () {
            return new Future(() => new FakeAsync().run((async) {
              var controller = new StreamController();
              var ret = controller.stream.first.then((_) {
                expect(async.getClock(initialTime).now(), initialTime);
  