Test Driven Development (TDD) is a very simple method of development, in which you design unit tests before the coding. For example, you take a user story scenario and design pseudo code for unit test in your IDE of choice. This, of course will fail when run, and it needs additional code to translate the real word definition into functionality. Code is then added to get unit test to work, then it is refactored until the developer is sure it meets the requirement.
BDD (Behavior Driven Development) and FDD (Feature Driven Development) use this principle, and execute same process, usually using acceptance test tools such as Fitnesse or Specflow to put more focus on the requirements input process. Below is a simple introduction to TDD …
