I want to add a test to ensure #packageManifest answers a Class.

Since RPackage is in RPackageCore, but the #packageManifest method is in Manifest-Core

I'm not sure whether:

1. I have to make the test in RPackageTest but make the test method from the Manifest-Core package
   
2. I have to make the test in RPackageTest but make the test method from the Manifest-Tests package
   
3. Create a new class in Manifest-Tests to hold this new test (and someupcoming tests as well)
   

��