ember.js - Routine controller working but failing in test -

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i'm building ember app ember-cli , reason mundane controller works @ runtime, fails when being run through tests following error:

 typeerror: cannot read property 'find' of null

the controller nothing more than:

export default ember.arraycontroller.extend({     exercisetemplates: null,     setup: function() {         this.set('exercisetemplates', this.get('store').find('exercise-template'));     }.on('init'),  });

any ideas?

btw, here's stacktrace:

typeerror: cannot read property 'find' of null     @ eval [as setup] (trainer/controllers/workouts.js:11:54)     @ sendevent (http://localhost:4200/assets/vendor.js:27786:27)     @ new class (http://localhost:4200/assets/vendor.js:47448:9)     @ function.mixin.create.create (http://localhost:4200/assets/vendor.js:47903:16)     @ object.defaultsubject [as subject] (http://localhost:4200/assets/test-support.js:200:22)     @ object.context.(anonymous function) [as subject] (http://localhost:4200/assets/test-support.js:217:38)     @ object.eval (trainer/tests/unit/controllers/workouts-test.js:15:29)     @ object.wrapper (http://localhost:4200/assets/test-support.js:272:31)     @ object.test.run (http://localhost:4200/assets/test-support.js:1084:18)     @ http://localhost:4200/assets/test-support.js:11

the store injected controllers this.store - work if change code use this.store instead of this.get('store')?

update - trying provide more useful answer:

looking @ on of ember-data tests see there ds._setupcontainer method. @givanse's comment above think adding following test setup might help:

var container = new ember.container(); ds._setupcontainer(container);

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