All three tests appear to be testing functionality that's tested elsewhere.
MessageSourceAutoConfigurationIntegrationTests
is testing that a configuration property can be set by@SpringBootTest
MessageSourceAutoConfigurationProfileTests
is testing that profile can be activated by@ActiveProfiles
and that a profile-specific configuration file is then loadedSpringJUnitTests
is testing that@Value
can resolve placeholders from the environment and that the environment has been populated by `application.properties