"I don't write tests for one line functions or functions that are obviously trivial. Again, they'll be tested indirectly."

The funny thing about this is when I read this bullet point I thought, "Bob Martin would disagree with this". His rules for TDD ( http://butunclebob.com/ArticleS.UncleBob.TheThreeRulesOfTdd ) would force that method to be tested whether he wants to or not. Then I scroll down to see who wrote the article... Bob Martin

EDIT: But maybe he meant to emphasize "indirectly". Maybe it was under test at first but then got extracted into a simple method under refactoring.