Moving from Test-Last to Test-Driven Development

Has it ever happened to you? Due to an immovable delivery schedule, time for testing is squeezed and long hours are the norm at the end of a project. Well, let’s move the testing forward in the development process. In fact, teams are learning that, rather than relegating tests to near the end of a project, there are huge benefits to adopting a test-driven process-a more maintainable and robust design, testable code, fewer defects, and a cross-functional highperformance team. By combining unit test-driven and acceptance test-driven processes in a more agile setting, you can deliver on shorter schedules without sacrificing quality. Mike Cohn shares his experiences with test-driven development, including the flexibility it offers for dealing with schedule pressure, the role of documentation, and the steps for getting started. He also describes a test “pyramid” and how to separate test specifications from test writing.

• A model for test-driven development with unit and acceptance testing
• Split large features into small, but valuable, pieces that can be written in a test-driven manner
• The critical role of test automation in test-driven development