This short video shows how to use Mockito Argument Matchers for stubbing and verifying mocks in Java unit tests. Mockito is an open source mocking framework that tastes really good. It lets you write beautiful tests with clean and simple API. Mockito doesn’t give you hangover because the tests are very readable and they produce clean verification errors.
Video Source: http://www.canoo.com/blog/2010/12/15/mockito-screencasts-for-stubbing-verifying-and-argument-matching/