After experiencing the concepts of test-driven-development during the last few weeks, I realised the essence of agile testing. After reviewing main parts of Janet Gregory’s and Lisa Crispin’s upcoming book on Agile Testing back in February I just now realised a common pattern in test-driven-development and agile testing: Tests – or like Brian Marick stated it: examples – drive the development process. You start with a first simple example. This might be a “the collection has just one element” during test-driven-development or “the account is activated afterwards” during a test scenario. From my point of view this can be thought as the essence of agile testing in either case.