Useful design patterns for unit testing/TDD?

Question

Reading this question has helped me solidify some of the problems I\'ve always had with unit-testing, TDD, et al.

Since coming across the TDD approach to development I k

Answer 1

Design patterns aren't directly relevant to TDD, as they are implementation details. You shouldn't try to fit patterns into your code just because they exist, but rather they tend to appear as your code evolves. They also become useful if your code is smelly, since they help resolve such issues. Don't develop code with design patterns in mind, just write code. Then get tests passing, and refactor.