anchor.diff:  
             outputParser.expectSources = false;
             streamController.add('compile-expression-to-js abc\n'
  -                  '$library\n1\n1\nabc\nabc\n$module\n2+2\n'
  +                  '$library\n2\n1\nabc\nabc\n$module\n2+2\n'
                 .codeUnits);
             count += 1;
           } else if (count == 2) {
  
positive.code: 
            outputParser.expectSources = false;
            streamController.add('compile-expression-to-js abc\n'
                    '$library\n1\n1\nabc\nabc\n$module\n2+2\n'
                .codeUnits);
            count += 1;
          } else if (count == 3) {
  
negative.code:         '--platform=${ddcPlatformKernel.path}',
          '--output-dill=${dillFile.path}',
          '--target=dartdevc',
          '--packages=${package_config.path}',
          '--experimental-emit-debug-metadata',
          '--enable-experiment=non-nullable',
        ];
  
        final StreamController<List<int>> streamController =
  