anchor.diff:        'FLUTTER_ROOT': '/'
       },
     );
  -  MockFuchsiaSdk fuchsiaSdk;
  +  FakeFuchsiaSdk fuchsiaSdk;
   
     setUp(() {
  -    fuchsiaSdk = MockFuchsiaSdk();
  +    fuchsiaSdk = FakeFuchsiaSdk();
       fileSystem = MemoryFileSystem.test();
     });
   
  
positive.code: import 'package:flutter_tools/src/fuchsia/fuchsia_sdk.dart';
  import 'package:flutter_tools/src/project.dart';
  import 'package:meta/meta.dart';
  import 'package:mockito/mockito.dart';
  import 'package:process/process.dart';
  
  import '../../src/common.dart';
  import '../../src/context.dart';
  import '../../src/testbed.dart';
  
  // Defined globally for mocks to use.
  FileSystem fileSystem;
  
  void main() {
  
negative.code:   });
  }
  
  class FakeFuchsiaPM extends Fake implements FuchsiaPM {
    String _appName;
  
    @override
  