I've got mixed feelings about this. I'm leaning towards agreeing with you, because testing for the most part should be about the contract and not specific imple

I've got mixed feelings about this. I'm leaning towards agreeing with you, because testing for the most part should be about the contract and not specific implementation. However in rare cases, as part of early development phase perhaps, I could see this being a useful signal. Provided it gets refactored later on. I suppose having lots of mocks is a smell after all..