It was impossible to select the 'all' filter for categories that have
the default list filter set to 'no subcategories'. This happens because
'/all' was not appended to the URL and in the absence of any list filter
('all' or 'none'), the default list filter ('none') was automatically
selected.
Using arrow functions changes `this` context, which is undesired in tests, e.g. it makes it impossible to setup things like pretender (`this.server`) in `beforeEach` hooks.
Ember guides always use classic functions in examples (e.g. https://guides.emberjs.com/release/testing/test-types/), and that's what it uses in its own test suite, as do various addons and ember apps.
It was also already used in Discourse where `this` was required. Moving forward, it will be needed in more places as we migrate toward ember-cli.
(I might later add a custom rule to eslint-discourse-ember to enforce this)
The prefixing logic is moved into a `prefixProtocol` function in lib:url.
This commit also renames an incorrectly named test and uses https as default instead of http, in 2020 it's reasonable to think we most likely want https and not http. User can still specify http if required.
We used many global functions to handle tests when they should be
imported like other libraries in our application. This also gets us
closer to the way Ember CLI prefers our tests to be laid out.
This is where they should be as far as ember is concerned. Note this is
a huge commit and we should be really careful everything continues to
work properly.
