If practical (dependent on time constraints, complexity of the project, etc.) I like to test internal/private methods also. As stated in the OP, it allows me to feel more safe when refactoring my internal stuff.

If you test just the public methods, that one test failing won't point to which internal/private method is broken by your refactoring or adding features. Testing the internal/private methods will point out what is broke at a level of granularity lower than just testing the public interface.

In reply to Re^2: "Accessors break encapsulation" by etm117
in thread "Accessors break encapsulation"? by tlm

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