Ember CLI testing complicated model relationships
Solution 1:
If you are using Ember default 'Ember-QUnit' then you have to list all the models in needs.
But there is an alternative for testing which I am using i.e. ember-data-factory-guy. This is used to create factory instead of fixture data when testing Model, component, controller etc.
You can go through it.
https://github.com/danielspaniel/ember-data-factory-guy