There is an Ember-CLI function, which is not very well documented (luck of finds), which I used for our built-in repo add-on, which includes adding βtest supportβ to your add-on.
In your case, you can do something similar in your addon
foo |-- test-support |-- helpers | |-- common-helper.js | |-- anther-common-helper.js |-- unit |-- models |-- user-test.js
I use something very similar without any problems. It saved a lot of time for us, hope it helps
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