Timetravelling in JavaScript unit tests

At the February berlinjs meet-up Krzysztof Szafranek had a very nice, short talk about TDD in JavaScript (slides here). Among many other things he was showing busterjs and the way it lets you test asynchronous stuff without having to actually wait for time to pass.

I made a note of it to give it a closer look. When I recently had to write some JavaScript again, I remembered about it and was keen to give it a try. Since we were already using jasmine as our testing framework, my colleague Christoph and I were looking for something equivalent there. To cut the intro short, there is: jasmine.Clock.