SpringBootTestContextCustomizer testRestTemplate bean name causes unexpected errors

[dustinschultz]

Spring Boot 1.4.2

SpringBootTestContextCustomizer defines a bean with the name testRestTemplate that is of type TestRestTemplate. If any user-defined bean in a unit test is defined with the same bean name, unexpected errors occur:

Such as:

java.lang.ClassCastException: org.springframework.boot.test.context.SpringBootTestContextCustomizer$TestRestTemplateFactory$$EnhancerBySpringCGLIB$$9fac7b5a cannot be cast to org.springframework.web.client.RestTemplate

Or this one (even though a RestTemplate bean is defined) because the testRestTemplate that was defined is of type org.springframework.boot.test.web.client.TestRestTemplate

No qualifying bean of type 'org.springframework.web.client.RestTemplate' available

Given the likelihood that someone defining a bean named testRestTemplate in their unit test is very high, the TestRestTemplate bean name should be namespaced (e.g. SpringBootTestContextCustomizer_testRestTemplate) so as to not conflict with user defined beans.