Matthew Setter has a new article on his MaltBlue site today that suggests that one of the reasons a project is successful is because of effective testing.
Like many of us, despite being told repeatedly how great testing is, the benefits it will bring, the time it will save and how it will improve the quality of my applications, I too considered testing a second-thought. I saw it as something which was both expensive and time-consuming. If I was genuine with you, I'd say I believed it be be nothing more than a "nice to have", after the application was written. If you also feel (or have felt) this way - know that you're not alone.
He realized, though, that the usual false assumptions about testing were just that and starteed getting into testing, TDD and BDD on recent projects. He talks some about some general thoughts around testing like "testing can't be an after-thought" and the fact that it's no always easy. He includes a way of thinking about testing in your application and the confidence good, solid tests can bring.