anchor.diff:    }
   
     void test_applySingleChange() {
  -    resourceProvider.getFile('/test.dart').writeAsStringSync('void main() {}');
  +    getFile('/test.dart').writeAsStringSync('void main() {}');
       dartfixListener.addSourceChange(
           "test change",
           Location('/test.dart', 10, 0, 1, 10),
  
positive.code:           ])
          ]));
      site.performApply();
      expect(resourceProvider.getFile('/test.dart').readAsStringSync(), '''
  void main(List args) {
    print(args);
  }''');
  
negative.code:               edits: [SourceEdit(10, 0, 'List args')])
          ]));
      site.performApply();
      expect(getFile('/test.dart').readAsStringSync(), 'void main(List args) {}');
      expect(state.hasBeenApplied, true);
    }
  }
  