Well, I guess we will have to agree to disagree. I like that you brought cohesion into the picture, as it is one part of getting compression right. I also like that you have been talking about listening to your tests. It is important to listen to your tests, and your code in general, as it can talk and give feedback to those who know how to listen. Ultimately though I feel that coupling is a good thing, and I'm not sure how writing the types of unit tests you describe would help me find the unwanted types of coupling. To me the only coupling I don't want is random coupling, which I would automatically avoid just by not using random extra things in the code, by having a very general aesthetic sense of what the responsibilities of a class should and should not be, and by refactoring to simplify things (although that simplification is often accomplished by either introducing some new coupling or by replacing some existing coupling with more desirable coupling).
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Well, I guess we will have to agree to disagree. I like that you brought cohesion into the picture, as it is one part of getting compression right. I also like that you have been talking about listening to your tests. It is important to listen to your tests, and your code in general, as it can talk and give feedback to those who know how to listen. Ultimately though I feel that coupling is a good thing, and I'm not sure how writing the types of unit tests you describe would help me find the unwanted types of coupling. To me the only coupling I don't want is random coupling, which I would automatically avoid just by not using random extra things in the code, by having a very general aesthetic sense of what the responsibilities of a class should and should not be, and by refactoring to simplify things (although that simplification is often accomplished by either introducing some new coupling or by replacing some existing coupling with more desirable coupling).