In model unit tests this.subject().store and this.store() are different

[YoranBrondsema]

I first posted this issue on the ember.js repository (emberjs/ember.js#10367 (comment)) but was told that it's almost certainly a bug in ember-cli-qunit.

See this discussion on StackOverflow: http://stackoverflow.com/a/25945287/1269194. In a model unit test, the Store objects returned by this.subject().store and this.store() are not the same, resulting in an error when trying to assign a model to a relationship.

For instance, say you have Parent and Child as follows:

Parent = DS.Model.extend({
    child: belongsTo('child')
});

Child = DS.Model.extend();

and in a unit test for Parent you do

this.subject().set('child', this.store().createRecord('child'));

then you get an error Error: Assertion Failed: You can only add a 'child' record to this relationship.

I encountered this bug when upgrading our non-ember-cli project to ember-cli 0.1.11.

[stefanpenner]

sounds like a bug

[YoranBrondsema]

Ok, it now seems that after upgrading from ember-data b12 to b14.1, the issue is resolved...