anchor.diff:      Source result = resolver
           .resolveAbsolute(parseUriWithException("package:some/file.dart"));
       expect(result, isNull);
  -  }
  -
  -  DartSdk _createSdk() {
  -    ResourceProvider resourceProvider = PhysicalResourceProvider.INSTANCE;
  -    Folder sdkFolder = FolderBasedDartSdk.defaultSdkDirectory(resourceProvider);
  -    expect(sdkFolder, isNotNull);
  -    return new FolderBasedDartSdk(resourceProvider, sdkFolder);
     }
   }
   
  
positive.code:   runReflectiveTests(UriKindTest);
  }
  
  @reflectiveTest
  class ContentCacheTest {
    void test_setContents() {
  
negative.code:     expect(source.fullName, file.getAbsolutePath());
      expect(source.isInSystemLibrary, isTrue);
    }
  }
  
  @reflectiveTest
  