Improved error message on double registration #98
+128
−1
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As requested, an example using Mockito.
I added some more tests, and it occurred to me that we might want to have a nice error message on duplicate registrations, in case you register both in a top class and a nested class. This would have failed in any case (and does not make sense imho.). The entire test suite uses 1 MatsFactory, so it is global for all tests.