I am trying to write jUnit test cases for custom teaser component which extends the core Teaser component using the Delegation Pattern for Sling Models using "@Self @Via(type=ResourceSuperType.class)" as specified here: https://github.com/adobe/aem-core-wcm-components/wiki/Delegation-Pattern-for-Sling-Models When I try to set the context (io.wcm.testing.mock.aem.junit5.AemContext) and adapt the context's request (I've tried resource as well) to the model I have created (like the "PageHeadline" from the example), I am getting a NullPointerException.
I am using AEM 220.127.116.11 and trying to run test cases in JUnit 5
Anyway, next to the working solution this seems to be a short-coming of the mocking libraries. Can you create a minimal testcase (at best without any AEM dependency) and post it to the sling-developer list?
I have the same issue. I needed to declare the delegate proxy core component (Page in my case) as optional in my sling model as it is not resolved in the unit test (should not be optional in the real use case). Is a pity because my custom logic is simply a fallback of the core component one. I would like to have the object not null in my unit test so I will drop the Optional annotation for the field.