Add native-events mode

[ro0gr]

addresses #311

I've rebased commits from #325 for more convenient review and addressed @pzuraq comment.

---

ember-native-events context allows not to rely on global ember test helpers(click, fillIn,..).

One of the benefits of native-events mode is an ability to test jquery-free applications.
However we still use jquery selectors like :is, :contains etc(#289).
In order to drop dependency on jquery provided by Ember by default we bundle our own jquery version.

To enable native dom helpers in your tests, put this lines into your tests/test-helper.js:

// tests/test-helper.js
...
import { useNativeEvents } from 'ember-cli-page-object/extend';

useNativeEvents(); // this will replace classic contexts with `e-n-d-h`

Tests

I've expanded property tests with [native-dom] mode for both integration and acceptance contexts. It seems a little not optimal however it gives a solid code coverage with a minimal efforts.

todo

• make CI green (Update ember-cli@2.16 #333)

[ro0gr]

As @pzuraq noticed in #ec-page-object slack channel we still allow to specify jquery selectors in page objects in a native-dom mode:

[7:26 PM] moreso what I mean is here: https://github.com/san650/ember-cli-page-object/pull/339/files#diff-66f0a7ca63b50a6b9973d119ab2570a5R43
[7:26] in theory, a user could pass in a jquery selector
[7:27] which would then be matched correctly, pull the corresponding element out, and apply the native dom helper

That means the current native-dom name is not very precise. We might get a naming collision If we occasionally will decide to provide true native-dom mode w/o jquery on board. So in the last commit I've renamed native-dom to native-events as @magistrula previously suggested.

Also useNativeDOMHelpers renamed to useNativeEvents

[san650]

@ro0gr can you rebase with master?

[ro0gr]

Sure. Will do it today

[coveralls]

Coverage increased (+0.1%) to 98.063% when pulling fdadc85 on ro0gr:native-dom into 8030784 on san650:master.

[ro0gr]

It's finally green 🎉

[san650]

👏 👏 👏 👏 🎉 🍾

[simonihmig]

@ro0gr Thanks a lot for working on this! Also to all others who helped to get this to land! (@pzuraq @magistrula @san650) This is highly appreciated! 👍 👏

I just wished I could have helped more, but time was too limited. But we do have an app I want to give the alpha version a try, will report back if there are any issues!