Doc: Suggest beforeEach for all tests with QUnit global hooks?

[nruth]

It might be worth documenting this as a way of installing in an ember-cli app's test-helper.js
Excessive perhaps, but does the localStorage gets reset if you forget to add this to each test file?

setupWindowMock(QUnit.hooks)

These were added in QUnit 2.18, so relatively recent.

https://api.qunitjs.com/QUnit/hooks/
https://github.com/qunitjs/qunit/releases/tag/2.18.0

[simonihmig]

Yeah, makes sense. @nruth would you be up for a PR? 😀