Stop Using (Quite So Many) Mock Objects

Mock objects are a great trick for testing code that cannot be tested any other way. Unfortunately, a lot of developers have interpreted that to mean that mock objects should be used for testing any and all code. This leads to tests that are not very thorough, tightly coupled to the code under test, hard to understand, and hard to modify. I'll discuss some techniques that help you write better tests -- most importantly, fakes and stubs.