I am trying to prevent my spring boot application to start if I consider two or more active profiles to be conflicting. I.e. dev and prod should not be active at the same time.

Moreover, I want to make sure this logic and its integration into Spring bootstrapping code is properly tested.

I tried EnvironmentPostProcessor as well as ApplicationEvent<ApplicationEnvironmentPrepared>, I have annotated the test with @SpringBootTest and I use assertThrows in the test method.

If I do new AnnotationApplicationContext() I don’t seem to find a way to manipulate the environment used by the context and if I try to SpringApplication.run() a test application myself, it doesn’t seem to be able to find any injectable bean for environment at all.

I am pretty sure I am trying the wrong things and maybe there’s an easier way to achieve my goal anyway. Any hints or pointers would be greatly appreciated.