anchor.diff:          xit,
           SpyObject,
           SpyFunction;
  -import 'package:unittest/unittest.dart' hide expect;
  -
  -import 'dart:async';
   
   import 'package:angular2/src/dom/dom_adapter.dart' show DOM;
   
  
positive.code: library test_lib.test_lib;
  
  import 'package:guinness/guinness.dart' as gns;
  export 'package:guinness/guinness.dart'
  
negative.code:   NotExpect(actual) : super(actual);
  
    void toEqual(expected) => toHaveSameProps(expected);
    void toBePromise() => gns.guinness.matchers.toBeFalse(actual is Future);
    void toBeNull() => gns.guinness.matchers.toBeFalse(actual == null);
    Function get _expect => gns.guinness.matchers.expect;
  }
  
  