Investigate test loader changes in ember-cli-qunit@4

[rwjblue]

Just a reminder to double check to the changes made in ember-cli/ember-cli-qunit#176 to make sure ember-exam still functions properly.

[trentmwillis]

So the ember-cli-qunit changes do cause problems here, I'm going to investigate a way to make it backwards and forwards compatible.

[calderas]

I think parallelization is no longer working on ember-cli v2.13.x due to this change since it comes with ember-cli-qunit v4.0.x by default.

[trentmwillis]

Seems likely. I'll try to find some time to look into it soon but would greatly appreciate if someone else could investigate before then.

[calderas]

I can confirm TestLoader.prototype.loadModules is not being executed when using ember-cli-qunit v4.0.x

That means ember exam runs the whole test suite N times when using --parallel --split=N

I guess this needs to be refactored to support the new behavior on cli-qunit.
https://github.com/trentmwillis/ember-exam/blob/master/vendor/ember-exam/test-loader.js#L55-L59

[trentmwillis]

Looks like ember-cli-qunit@4.0.0 changed the order of execution of some things, thus test-helper.js runs first and calls start() which runs the TestLoader. This happens before ember-exam can monkeypatch the TestLoader class. I want to update this addon to take a more explicit approach, similar to ember-cli-qunit.

[YoranBrondsema]

I'm encountering the same issue, i.e. the whole suite is executed when splitting. @trentmwillis anything I can do to help getting your PR in master?

[trentmwillis]

I just released v0.7.0 which should make it possible to work with ember-cli-qunit@4.0.0. Note you'll need to invoke a new loadEmberExam function though.

[YoranBrondsema]

@trentmwillis Awesome, works for me. Thanks so much!

[scottkidder]

Works for me for the most part except for #95