TDD. When you can move on?

Question

When doing TDD, how to tell \"that\'s enough tests for this class / feature\"?

I.e. when could you tell that you completed testing all edge cases?

Answer 1

You could always use a test coverage tool like EMMA (http://emma.sourceforge.net/) or its Eclipse plugin EclEmma (http://www.eclemma.org/) or the like. Some developers believe that 100% test coverage is a worthy goal; others disagree.