anchor.diff:  import 'package:analyzer/src/context/builder.dart';
   import 'package:analyzer/src/generated/package_build.dart';
   import 'package:analyzer/src/generated/source.dart';
  -import 'package:mockito/mockito.dart';
   import 'package:package_config/packages.dart';
   import 'package:test/test.dart';
   import 'package:test_reflective_loader/test_reflective_loader.dart';
  
positive.code:   });
  }
  
  class MockContextBuilder extends Mock implements ContextBuilder {}
  
  class MockPackages extends Mock implements Packages {}
  
  class MockUriResolver extends Mock implements UriResolver {}
  
  @reflectiveTest
  class PackageBuildFileUriResolverTest extends _BaseTest {
  
negative.code:         ? provider.newFile(_p(path), '')
          : provider.getResource(_p(path));
      final Source source = file.createSource(uri);
      packageUriResolver.resolveAbsoluteMap[uri] = source;
      return uri;
    }
  
  