Spring Boot Test @SpyBean should be able to create a spy based on an interface class that is passed.

[teamfam2014]

I have created a stack overflow question regarding this enhancement here.

To summarize what was mentioned in that post above, I believe that we should be able to provide an interface class or an abstract class within the value of the @SpyBean annotation, and the framework should be intelligent enough to wrap the spring beans that extend the interface/abstract class with mockito spies. I was expecting this behaviour from the MockitoPostProcessor class.

Spring Boot Version: 2.2.8.RELEASE

[wilkinsona]

When @SpyBean is used on a field, we need a single bean to spy so that the field's value can be injected. See #7621, #10655, #11066, and #11077 where support for using @Primary to identify which bean to spy when there are multiple candidates.

When @SpyBean is used on a class, we have more freedom and I think it would be possible to allow a single class to identify multiple beans to spy upon. Looking back at the 1.x code, things appear to have been closer to this before @Primary support was added, although I'm not sure that it worked as described here.

I'll flag this one for a team meeting so that we can discuss if this is something that we want to support.

[wilkinsona]

@bclozel another one for Framework please to consider as a possible enhancement for @MockitoSpyBean.

[sbrannen]

@simonbasle, how does this relate to the current implementation of @MockitoSpyBean in Spring Framework?

[simonbasle]

@wilkinsona @sbrannen the bean override infrastructure in Framework is fields only

[wilkinsona]

Thanks, @simonbasle. I assume that you're not considering expanding that support beyond fields so I'll close this one.