anchor.diff:  
       test('compile one file', () async {
         final StreamController<List<int>> inputStreamController =
  -          new StreamController<List<int>>();
  -      final ReceivePort compileCalled = new ReceivePort();
  +          StreamController<List<int>>();
  +      final ReceivePort compileCalled = ReceivePort();
         when(compiler.compile(any, any, generator: anyNamed('generator')))
             .thenAnswer((Invocation invocation) async {
           expect(invocation.positionalArguments[0], equals('server.dart'));
  
positive.code:             count += 1;
              inputStreamController.add('reset\n'.codeUnits);
              inputStreamController.add('recompile ${file.path} abc\n'
                  '${file.uri}\n'
                  'abc\n'
                  .codeUnits);
              break;
            case 2:
  
negative.code:           // from compiled kernel files matches kernel file produced when
            // compiler was initialized from sources on the first run.
            if (serverCloses == 0) {
              compiledKernels.add(File(dillFile.path).readAsBytesSync());
            } else {
              checkIsEqual(
                  compiledKernels[count], File(dillFile.path).readAsBytesSync());
            }
            if (count == 0) {
              // First request is to 'compile', which results in full kernel file.
  