Add JavaScript unit tests to core

[adamsilverstein]

With more JavaScript entering core (like the new revisions screen), it would be great to build some JavaScript unit tests. I am opening this ticket to stimulate some discussion! I'm new to JavaScript unit testing, so could use some help from those with more experience.

There are many javascript unit testing frameworks: Qunit and Jasmine seem like likely candidates. Those who have experience with JavaScript unit test - please offer direction!

So far, I set up Jasmine.js and phantomjs (headless javascript engine), which seemed relatively painless. I'm going to work on writing some actual tests next, starting with revisions. Once I have something useful, I will post the results here.

[brianhogg]

Adding a quick comment so I can get notified of the discussion. Have done some unit testing with Backbone.js/Underscore.js/Jasmine-jquery in the past, so will help where I can! Was also working great as a javascript-based TDD tool.

[DrewAPicture]

Replying to brianhogg:

Adding a quick comment so I can get notified of the discussion.

If you want to receive updates for a particular ticket, you can just select the 'Add to Cc' checkbox under the ticket description ;)

[brianhogg]

Thanks - definitely didn't see that way down under modify ticket :)

[kadamwhite]

I would love to help with this! Long-overdue, in my opinion.

[adamsilverstein]

note: this was discussed in the JavaScript dev chat in ​IRC, and work has started on this in #25088; once we have a foundation and sample test we can start building out more tests.

[SergeyBiryukov]

Related: #25096

[nacin]

Duplicate of #25096.

[nacin]

Oops, actually a duplicate of #25088.