If I have an UnstructuredList with a known GVK, passing it to fakeClient.List returns an error:

item[0]: can't assign or convert unstructured.Unstructured into <myGV>.<myKind> 

Running in the debugger revealed that fakeClient.List passes the underlying type to client-go, which returns a list of the underlying type. So it makes sense that fake client would error when trying to populate the UnstructuredList with objects it gets from client-go.

There should be some way for fakeClient.List to handle Unstructured* objects. IIUC the real client delegates to an unstructured client. That seems heavy-handed here, but it may be the only way to avoid a bunch of spaghetti in fakeClient.List just to handle UnstructuredList as a special case.

This is related to #702 but is not the same issue.