Code Coverage What is code coverage? When you write some code and then test it, how sure are you that you have tested the whole thing? Code coverage gives you an idea of how well tested a bit of code is.
If you have lots of branches in your code (not something I am advocating) it is important to make sure you test it all so we can use code coverage to get an idea of how much of a particular piece of code has been tested (or not).