Duplicate `BeanOverrideHandler` discovered in `@Nested` test case with superclass from different class or in interface implemented multiple times

[aykborstelmann]

Consider the following extension of the example given in #34324 :

@SpringBootTest
class SomeTest extends AbstractTest {
  @Nested
  class SomeNestedTest extends AbstractTest.BaseClassForNestedTests {}
}

abstract class AbstractTest {

  @MockitoBean SomeService someService;

  abstract class BaseClassForNestedTests {

    @Test
    void test() {}
  }
}

@Service
class SomeService {}

Upgrading from Spring Boot 3.4.1 to 3.4.3 thus upgrading Spring Framework from 6.2.1 to 6.2.3 (skipping 3.4.2 and 6.2.2 because of #34324) again leads to the same stacktrace.

java.lang.IllegalStateException: Duplicate BeanOverrideHandler discovered in test class SomeTest$SomeNestedTest: [MockitoBeanOverrideHandler@12ed9db6 field = SomeService AbstractTest.someService, beanType = SomeService, beanName = [null], strategy = REPLACE_OR_CREATE, reset = AFTER, extraInterfaces = set[[empty]], answers = RETURNS_DEFAULTS, serializable = false]
	at org.springframework.util.Assert.state(Assert.java:101)
	at org.springframework.test.context.bean.override.BeanOverrideContextCustomizerFactory.lambda$findBeanOverrideHandlers$1(BeanOverrideContextCustomizerFactory.java:55)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)
	at org.springframework.test.context.bean.override.BeanOverrideContextCustomizerFactory.findBeanOverrideHandlers(BeanOverrideContextCustomizerFactory.java:54)
	at org.springframework.test.context.bean.override.BeanOverrideContextCustomizerFactory.createContextCustomizer(BeanOverrideContextCustomizerFactory.java:46)
	at org.springframework.test.context.bean.override.BeanOverrideContextCustomizerFactory.createContextCustomizer(BeanOverrideContextCustomizerFactory.java:38)
	at org.springframework.test.context.support.AbstractTestContextBootstrapper.getContextCustomizers(AbstractTestContextBootstrapper.java:360)
	at org.springframework.test.context.support.AbstractTestContextBootstrapper.buildMergedContextConfiguration(AbstractTestContextBootstrapper.java:332)
	at org.springframework.test.context.support.AbstractTestContextBootstrapper.buildDefaultMergedContextConfiguration(AbstractTestContextBootstrapper.java:267)
	at org.springframework.test.context.support.AbstractTestContextBootstrapper.buildMergedContextConfiguration(AbstractTestContextBootstrapper.java:215)
	at org.springframework.test.context.support.AbstractTestContextBootstrapper.buildTestContext(AbstractTestContextBootstrapper.java:108)
	at org.springframework.boot.test.context.SpringBootTestContextBootstrapper.buildTestContext(SpringBootTestContextBootstrapper.java:111)
	at org.springframework.test.context.TestContextManager.<init>(TestContextManager.java:142)
	at org.springframework.test.context.TestContextManager.<init>(TestContextManager.java:126)
	at org.springframework.test.context.junit.jupiter.SpringExtension.getTestContextManager(SpringExtension.java:363)
	at org.springframework.test.context.junit.jupiter.SpringExtension.beforeAll(SpringExtension.java:128)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)

[sbrannen]

@aykborstelmann, thanks for reporting the issue and providing the reproducer.

I have confirmed that this is also a regression.

While looking into this, I also noticed that a duplicate is also reported for @MockitoBean declared at the type level on an interface that is implemented at multiple levels in a type hierarchy or enclosing class hierarchy.

In my fix in 305686d I should have actually tracked all visited types, not just enclosing classes.

So, I'll address the issue you've reported as well as the issue for interfaces in the same fix.

[aykborstelmann]

Thank you for your fast response and confirming the reproducer !

[sbrannen]

This has been fixed in e8f873a for inclusion in the upcoming 6.2.7 release.

Feel free to try it out in 6.2.7 snapshots, and let us know if the issue is resolved for you.

[aykborstelmann]

Thank you very much for the fast fix. I can confirm that it works 👍🏻