Make is easier to use TestRestTemplate with a custom ResponseErrorHandler

Custom error handler set using RestTemplateBuilder bean or using the configuration TestRestTemplateConfiguration from Spring Boot Reference Guide is overriden by TestRestTemplate.NoOpResponseErrorHandler.

Specifically, when using the following class:

class CustomResponseErrorHandler extends DefaultResponseErrorHandler {
    // implementation
}

in the configuration of the builder:

ResponseErrorHandler customErrorHandler = new CustomResponseErrorHandler();
RestTemplateBuilder builder = builderProvider.getIfAvailable()
                                             .errorHandler(customErrorHandler);

The following line is false:

new TestRestTemplate(builder.build()).getRestTemplate().getErrorHandler().equals(customErrorHandler)

[cs94njw]

TestRestTemplate doesn’t actually offer what @bclozel describes. I am writing my unit tests, using TestRestTemplate with a ResponseType of “UUID”. When I test BAD_REQUEST errors from my service, instead of my being able to inspect the ResponseEntity and check for status “401”, TestRestTemplate throws an exception saying it can’t decode the error message as a UUID. I don’t understand why TestRestTemplate is even attempting to decode the ResponseType when a 4xx error is returned.

[bclozel]

@cs94njw I don’t understand how this is related. This looks like a different problem? Could you report that separately with a sample project (something we can git clone or download) we can take a look at?