Johannes Link: MockMe for JavaScript
http://johanneslink.net/projects/mockme.html

JS UnitTest Mockup

Second Aspect: While using mockito in Java after many years of being a passionate EasyMock advocate, I have learned that Mockito's way to handle verification of calls after the fact - instead of specifying expectations before - suits my style of test-driven development best. Thus, strictly speaking MockMe should be more of a spying framework than a mocking framework.

There are a couple of mock frameworks for JavaScript but none really did what I needed. So I took my testing problems, some inspiration from mockito and a few days off to write MockMe.

Think Mockito for Javascript