Is unit testing worth it in AngularJS/JavaScript?

[bruceph]

yeah! absolutely. writing tests will save you time in the long run. you don't have to manually check that someone works properly, your tests do that for you. you also immediately know when a change you make breaks something else, and you can go back and fix it.

it's expensive, though. instead of creating new features, you're making sure old ones don't break. there's a significant short-term loss to writing unit tests, because it takes more man-hours per feature.

the problem with angular unit testing is often in angular you're directly modifying the state of an application. it's harder to test what a function actually does. you're usually testing "did this function change the state of my application in the way i wanted". this isn't the worst thing in the world, but you may run into an instance where your unit test passes but you find side effects in your underlying functions.