when(response.getWriter()).thenReturn(new PrintWriter(stream));
List<Converter> converters = new ArrayList<>();
converters.add(new CalendarConverter());
final DefaultTypeNameExtractor extractor = new DefaultTypeNameExtractor();
Instance<Converter> convertersInst = new MockInstanceImpl<>(converters);
Instance<SingleValueConverter> singleValueConverters = new MockInstanceImpl<>();
XStreamConverters xStreamConverters = new XStreamConverters(convertersInst, singleValueConverters);
serialization = new XStreamXMLSerialization(response, new XStreamBuilderImpl(xStreamConverters, extractor, new Serializee()), environment);