A test configuration annotated with @TestConfiguration does not override a bean, if it is defined as a separate class. Only using @TesConfiguration on an inner class works in this case.
Not working:
@TestConfiguration
public class ExternalTestConfig {
@Bean
public MyBean myBean() {
return Mockito.mock(MyBean.class);
}
}@SpringBootTest(properties = "spring.main.allow-bean-definition-overriding=true")
@Import(ExternalTestConfig.class)
public class ExternalTestConfigApplicationTest {
@Autowired
private MyBean myBeanMock;
@Test
void contextLoads() {
// test fails, if myBeanMock is not a mock
Mockito.verifyNoInteractions(myBeanMock);
}
}Working:
@SpringBootTest(properties = "spring.main.allow-bean-definition-overriding=true")
class InnerClassTestConfigApplicationTest {
@Autowired
private MyBean myBeanMock;
@Test
void contextLoads() {
// test fails, if myBeanMock is not a mock
Mockito.verifyNoInteractions(myBeanMock);
}
@TestConfiguration
public static class TestConfig{
@Bean
public MyBean myBean() {
return Mockito.mock(MyBean.class);
}
}
}My example uses spring boot 2.6.6, code can be found here: https://github.com/spring-boot-demos/demo-testing-bean-overriding
I read several blogs and articles and found some other examples, which do not work, e.g. this blog with example code which is very similar to my example code.
In my understanding, the behaviour of a class annotated with @TestConfiguration should be the same, no matter if defined as inner or separate class.
A test configuration annotated with
@TestConfigurationdoes not override a bean, if it is defined as a separate class. Only using@TesConfigurationon an inner class works in this case.Not working:
Working:
My example uses spring boot 2.6.6, code can be found here: https://github.com/spring-boot-demos/demo-testing-bean-overriding
I read several blogs and articles and found some other examples, which do not work, e.g. this blog with example code which is very similar to my example code.
In my understanding, the behaviour of a class annotated with
@TestConfigurationshould be the same, no matter if defined as inner or separate class.