Spring boot actuator breaks #AutoConfigureMockRestServiceServer - spring

Question

I have a class which builds multiple RestTemplates using RestTemplateBuilder:
private RestTemplate build(RestTemplateBuilder restTemplateBuilder) {
return restTemplateBuilder
.rootUri("http://localhost:8080/rest")
.build();
}
For my test setup I use #AutoConfigureMockRestServiceServer and mock responses using MockServerRestTemplateCustomizer:
mockServerRestTemplateCustomizer.getServer()
.expect(ExpectedCount.times(2),
requestToUriTemplate("/some/path/{withParameters}", "withParameters"))
.andRespond(withSuccess());
My test passes when I uncomment the spring-boot-actuator dependency in my pom and fails in the other scenario with the following message.
Expected: /some/path/parameter
Actual: http://localhost:8080/rest/pos/some/path/withParameters
I noticed by debugging through MockServerRestTemplateCustomizer that spring-boot-actuator applies a "DelegateHttpClientInterceptor" for supporting their built in metrics for rest templates. However this creates a problem with the following code which I found in RootUriRequestExpectationManager:
public static RequestExpectationManager forRestTemplate(RestTemplate restTemplate,
RequestExpectationManager expectationManager) {
Assert.notNull(restTemplate, "RestTemplate must not be null");
UriTemplateHandler templateHandler = restTemplate.getUriTemplateHandler();
if (templateHandler instanceof RootUriTemplateHandler) {
return new RootUriRequestExpectationManager(((RootUriTemplateHandler) templateHandler).getRootUri(),
expectationManager);
}
return expectationManager;
}
Because as mentioned above spring-boot-actuator registers a "DelegateHttpClientInterceptor" which leads to the above code not recognizing the RootUriTemplateHandler and therefore not matching the request using requestToUriTemplate.
What am I missing here to get this working?

Answer 1

As Andy Wilkinson pointed out, this seems to be a bug in Spring boot. I created an issue with a sample project.