RestTemplate reads String data with "\" content (Even with StringHttpMessageConverter) - spring

Question

I am working with Spring Framework 4.3.6.RELEASE
For testing purposes through RestTemplate how a consumer, if the HTTP DELETE method fails because the entity does not exist, I need return an error message in raw format or String. It because 'normally' DELETE does not require mandatorily neither Accept nor Content-Type. I don't want complicate the user setting the Accept either for XML or JSON
My #Test method fails with the following error
java.lang.AssertionError:
Expected: is "The entity does not exist"
but: was "\"The entity does not exist\""
Observe the \" part
In the server side, I have declared:
#Bean
public StringHttpMessageConverter stringHttpMessageConverter(){
StringHttpMessageConverter converter = new StringHttpMessageConverter();
converter.setDefaultCharset(StandardCharsets.UTF_8);
converter.setSupportedMediaTypes(Arrays.asList(new MediaType(MediaType.TEXT_PLAIN, StandardCharsets.UTF_8)));
return converter;
}
And is registered:
#Override
public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
converters.add(httpMessageConverterConfig.mappingJackson2HttpMessageConverter());
converters.add(httpMessageConverterConfig.mappingJackson2XmlHttpMessageConverter());
converters.add(httpMessageConverterConfig.stringHttpMessageConverter());
}
With a #ControllerAdvice, working together with a method annotated with #ExceptionHandler, a ResponseEntity<Object> object is created with the following approach in some place to establish the Content-Type
if(httpServletRequest.getMethod().equals(HttpMethod.DELETE.toString())){
headers.setContentType(new MediaType(MediaType.TEXT_PLAIN, StandardCharsets.UTF_8));
}
When I print the error message in the server side it prints without \" part
The RestTemplate for testing purposes is created with:
RestTemplate restTemplate = new RestTemplate(new MockMvcClientHttpRequestFactory(mockMvc));
restTemplate.setMessageConverters(customConverters);
restTemplate.setErrorHandler(restTemplateResponseErrorHandler);
Therefore why the \" part arrives to RestTemplate?
How it can be fix it.? What missing configuration is need it?
Alpha
Test Class declaration
#Transactional
#WebAppConfiguration
#RunWith(Parameterized.class)
#ActiveProfiles(resolver=TestActiveProfilesResolver.class)
#ContextConfiguration(classes={RootApplicationContext.class, ServletApplicationContext.class})
#TestExecutionListeners(listeners={LoggingTestExecutionListener.class}, mergeMode=MergeMode.MERGE_WITH_DEFAULTS)
public class PersonaDeleteOneRestControllerClientBadRequestTest {
Some variables in that class:
#Autowired
private WebApplicationContext webApplicationContext;
#Autowired
private RestTemplateClientSupport restTemplateClientSupport;
private MockMvc mockMvc;
private RestTemplate restTemplate;
private static RestTemplateResponseErrorHandler restTemplateResponseErrorHandler;
Some creations:
#BeforeClass
public static void setUp_(){
restTemplateResponseErrorHandler = new RestTemplateResponseErrorHandler();
}
#Before
public void setUp(){
mockMvc = MockMvcBuilders.webAppContextSetup(webApplicationContext).build();
restTemplate = restTemplateClientSupport.deleteOneBadRequest(mockMvc);
restTemplate.setErrorHandler(restTemplateResponseErrorHandler);
}
The RestTemplate part is:
#Component
public class RestTemplateClientSupport {
private static final Logger logger = LoggerFactory.getLogger(RestTemplateClientSupport.class.getSimpleName());
private final List<HttpMessageConverter<?>> customConverters;
#Autowired
public RestTemplateClientSupport(List<HttpMessageConverter<?>> customConverters){
this.customConverters = customConverters;
}
private RestTemplate createRestTemplateWithListHttpMessageConverter(MockMvc mockMvc){
RestTemplate restTemplate = new RestTemplate(new MockMvcClientHttpRequestFactory(mockMvc));
restTemplate.getMessageConverters().removeIf(converter -> {
if(converter.getClass().getSimpleName().equals(MappingJackson2XmlHttpMessageConverter.class.getSimpleName())){
logger.info("Removing: {}" , converter.getClass().getSimpleName());
return true;
}
else{
return false;
}
});
restTemplate.getMessageConverters().removeIf(converter -> {
if(converter.getClass().getSimpleName().equals(MappingJackson2HttpMessageConverter.class.getSimpleName())){
logger.info("Removing: {}" , converter.getClass().getSimpleName());
return true;
}
else{
return false;
}
});
restTemplate.getMessageConverters().removeIf(converter -> {
if(converter.getClass().getSimpleName().equals(StringHttpMessageConverter.class.getSimpleName())){
logger.info("Removing: {}" , converter.getClass().getSimpleName());
return true;
}
else{
return false;
}
});
restTemplate.getMessageConverters().addAll(customConverters);
return restTemplate;
Note: I am using restTemplate.getMessageConverters().removeIf(Predicate<>.. because I need remove these 3 default converters and add my own one created.