Favorite testing framework and why?

[robbbz]

Related:

• What's up with ava?
• How do you test browser-side modules built for use with browserify?
• What framework do you use to test webapps?
• Any experience with Intern?

[sindresorhus]

None. Testing could be so much better! I'm a big fan of tape for its simple syntax and lack of implicit globals, but I really dread the default TAP output. It's also a bit buggy and the code is very coupled to being a TAP stream, so it's hard to reason about. My own test runner AVA is the closest something can get to being my favorite, but it still has a long way to go until I'm completely happy about it.

The few times I've had to test browser-side modules I used a combination of Mocha and PhantomJS. It was a horrific experience. We're currently looking into browser testing with AVA using Browserify.

Haven't tried Intern. I looked at it far back when it was first released and it felt a bit heavy for my taste. Looks like it could maybe work with AVA through an adapter.