anchor.diff:        return response.mockContent;
       });
     }
  -  ;
   
     assert(_isMockTestExpando[currentTestCase] == false);
   
  
positive.code:       return [response.mockContentBinary, response];
      });
    }
    ;
  
    assert(_isMockTestExpando[currentTestCase] == false);
  
  
negative.code:     bool rawPath: false,
      bool followRedirects: true,
      int from,
      int to}) async {
    var uri = _getUri(port, path, secure: secure, rawPath: rawPath);
  
    HttpClient client;
    if (secure) {
      client = new HttpClient(context: clientContext);
    } else {
      client = new HttpClient();
    }
  
    try {
      var request = await client.getUrl(uri);
  
      if (!followRedirects) request.followRedirects = false;
      if (host != null) request.headers.host = host;
      if (ifModifiedSince != null) {
        request.headers.ifModifiedSince = ifModifiedSince;
      }
      _addRangeHeader(request, from, to);
      var response = await request.close();
      await response.drain();
      return response.statusCode;
    } finally {
      client.close();
    }
  }
  
  Future<HttpHeaders> getHeaders(VirtualDirectory virDir, String path,
  