As a recent convert to Test Driven Development (or TDD as his friends call him), I was surprised to hear that there were in fact 2 kinds of developer driven testing.  The standard one that everyone knows of is unit testing:  writing little testXXX methods that test a single publicly exposed method.  But the lesser known – but just as important – are acceptance tests:  tests which verify that  a group of classes working together properly fulfill some functionality.

So this first post will take a closer look at the first type of testing, unit tests, and will go into the value it provides to you as a developer.

read on