SpringBoot Seems a wrong type resolved with JacksonTester

With following hierarchy,

abstract class Some<T extends Some<T>> {
}

class Other extends Some<Other> {
}

@JsonTest
abstract class SomeTest<T extends Some<T>> {

    SomeTest(Class<T> entityClass) {
        this.entityClass = entityClass;
    }

    final Class<T> entityClass;

    @Autowired
    private ObjectMapper objectMapper;

    @Autowired
    private JacksonTester<T> jacksonTester;
}

class OtherTest extends SomeTest<Other> {

    OtherTest() {
        super(Other.class);
    }
}

The autowired jacksonTester has the Some.class as it's resolved type which should be, I think, Other.class.

When I instantiate the jacksonTester manually, like this, it works.

    @PostConstruct
    private void onPostConstruct() {
        jacksonTester = new JacksonTester<>(getClass(), ResolvableType.forClass(entityClass), objectMapper);
    }

FYI, No jackson related annotations are in the hierarchy.

Comment From: wilkinsona

Thanks for the report. Unfortunately, I don't think there's anything we can do about this. Type erasure means that the T cannot be resolved to Other.

To use JacksonTester with a complex type hierarchy with generics, you should create it manually as you have shown above. This gives you an opportunity to provide the type information that cannot be resolved automatically.