All three tests appear to be testing functionality that's tested elsewhere.
MessageSourceAutoConfigurationIntegrationTestsis testing that a configuration property can be set by@SpringBootTestMessageSourceAutoConfigurationProfileTestsis testing that profile can be activated by@ActiveProfilesand that a profile-specific configuration file is then loadedSpringJUnitTestsis testing that@Valuecan resolve placeholders from the environment and that the environment has been populated by `application.properties