Parallelize mocha tests

[amilajack]

Parallelize mocha tests

[thangngoc89]

I usually use AVA. It was built with parralism and es6 in mind

[amilajack]

mocha-parallel/mocha-parallel-tests#53

[amilajack]

Initially, this project was using Ava but I had to switch to mocha because I couldn't get chaijs to work with mocha

[amilajack]

I also like the cleaner output of mocha.

[amilajack]

But if we can get these things with Ava, lets migrate to it.

[thangngoc89]

Ok. That's cool. Can you be more specific sbot what you can't do with ava?

[amilajack]

It's helpful to have the tests output in an ordered 'list', like they do in mocha.

[thangngoc89]

I played around with Jest for a few day. So far so good, it uses expect as it assert library so no change on tests file. And with Jest 14, they released a killer feature: Snapshot testing with React

http://facebook.github.io/jest/blog/2016/07/27/jest-14.html

I suggest you give it a try

[amilajack]

This should be a planned feature but at the moment i dont think its very urgent. When this project is stable i think we should migrate add screenshot tests to all the component tests.

[thangngoc89]

we should migrate add screenshot tests to all the component tests.

Agreed. Visual testing is slow and error prone.

I forgot to mention, Jest can run test in parallel by default

[onbjerg]

@amilajack You can get mocha-like output from ava. Remember that ava is TAP-compatible, so you can use any TAP reporter.

This was probably the one you were looking for.

[amilajack]

@onbjerg Can I have nested tests like this:

describe('Some', () => {
  describe('Another', () => {
    it('should test Foo', () => {
      // Some test here
    })
  })
})

[onbjerg]

Not really. I agree with sindre that it is sort of an anti-pattern and should be discouraged. The most you can do is:

import test from 'ava'

test('something', (t) => {
  t.is(1, 1, '1 is 1')
})

Regardless, the thing you're asking was/is being discussed in avajs/ava#222.

[amilajack]

Can chai be used with ava?

[onbjerg]

Actually, scratch that. There's a package for that(tm): https://github.com/sheerun/ava-spec.

Can chai be used with ava?

Yes. But you might want to read a bit more about it here, as there are some trade-offs: Custom assertions.

Also, read avajs/ava#25 (which is linked in that section of the README), since the trade off might not be a deal-breaker overall.

[amilajack]

I see. All our tests are already written in mocha. It would be worth he migration to ava if it supported running tests on multiple threads. At the moment tho there are a bunch of architectural concerns with the project that need attention right now. Are you interested in contributing? 😁

[onbjerg]

It runs tests in parallel per default.

I might be up for contributing 🍇

[amilajack]

Yesss! 🔥🎉😁

What areas are you experienced in? Node? React? Redux? etc

[onbjerg]

Been doing Node for a few years, been doing React/Redux for a year or so 😬 I'm experienced in a lot of other things, too, but I don't think they apply to this project.

[amilajack]

That's great! Also I invited you to the gitter. I just commented an introduction to the project. Would recommend checking that out.

[amilajack]

@onbjerg just looked into jest and it looks very promising. What do you think about PR'ing for this? 😀