ember.js - Instance initializer unit test fails with "store is undefined" -

after generating example application:

ember new preloadtest cd preloadtest/ ember g instance-initializer preload ember g model test-data ember g route index ember g adapter application 

with following files:

models/test-data.js

import ds 'ember-data';  export default ds.model.extend({   name: ds.attr('string'),   value: ds.attr( 'number' ) }); 

routes/index.js

import ember 'ember';  export default ember.route.extend({   model(){     return this.store.peekall( 'test-data' );   } }); 

instance-initializers/preload.js

export function initialize( appinstance ) {   let store = appinstance.lookup( 'service:store' );   store.pushpayload( { "testdatas": [     { "id": 1, "name": "aaa", "value": 1},     { "id": 2, "name": "bbb", "value": 2},     { "id": 3, "name": "ccc", "value": 3}   ] } ); }  export default {   name: 'preload',   initialize }; 

templates/index.hbs

<ul> {{#each model |td|}}   <li>{{td.name}}: {{td.value}}</li> {{/each}} </ul> 

adapters/application.js

import restadapter 'ember-data/adapters/rest';  export default restadapter.extend({}); 

ember serve runs application , displays preload data going /tests default unit test preload instance initializer fails error store undefined.

full error message:

died on test #1 @http://localhost:4200/assets/tests.js:212:1 module.prototype.exports@http://localhost:4200/assets/vendor.js:94:20 module.prototype.build@http://localhost:4200/assets/vendor.js:142:5 findmodule@http://localhost:4200/assets/vendor.js:193:5 requiremodule@http://localhost:4200/assets/vendor.js:181:12 testloader.prototype.require@http://localhost:4200/assets/test-loader.js:67:9 testloader.prototype.loadmodules@http://localhost:4200/assets/test-loader.js:58:13 testloader.load@http://localhost:4200/assets/test-loader.js:89:7 @http://localhost:4200/assets/test-support.js:6397:5 : store undefined@ 114 ms source:       initialize@http://localhost:4200/assets/preloadtest.js:213:5 @http://localhost:4200/assets/tests.js:213:1 runtest@http://localhost:4200/assets/test-support.js:2716:14 test.prototype.run@http://localhost:4200/assets/test-support.js:2701:4 run/<@http://localhost:4200/assets/test-support.js:2843:6 process@http://localhost:4200/assets/test-support.js:2502:4 begin@http://localhost:4200/assets/test-support.js:2484:2 resumeprocessing/<@http://localhost:4200/assets/test-support.js:2544:4 

how initialize application's store can used in unit test?

edit - tests/unit/instance-initializers/preload-test.js

import ember 'ember'; import { initialize } 'preloadtest/instance-initializers/preload'; import { module, test } 'qunit'; import destroyapp '../../helpers/destroy-app'; //import ds 'ember-data';  module('unit | instance initializer | preload', {   //needs: [ 'service:store' ],   beforeeach: function() {     ember.run(() => {       this.application = ember.application.create();       this.appinstance = this.application.buildinstance();     });   },   aftereach: function() {     ember.run(this.appinstance, 'destroy');     destroyapp(this.application);   } });  // replace real tests. test('it works', function(assert) {   initialize(this.appinstance);    // confirm results of initializer here   assert.ok(true); }); 

tried needs: [ 'service:store' ] , without (although suggested should not need this if ember-data on page - i've tried importing both in unit test , in instance initialiser).

versions:

ember      : 2.4.5 ember data : 2.5.2 

at unit test of instance-initializer, don't need real store service. in such cases, prefer using mock services. behaviour of instance-initializer to put data store provided application. can mock store.

example test code mock service:

import ember 'ember'; import { initialize } 'preloadtest/instance-initializers/preload'; import { module, test } 'qunit'; import destroyapp '../../helpers/destroy-app';  //this mock store service: const storestubfactory  = ember.service.extend({   data: null,   init(){     this.data = [];   },   pushpayload(payload){       this.get('data').pushobject(payload);    },   getallpayloads(){       return this.get('data');   } });  module('unit | instance initializer | preload', {   beforeeach: function() {     ember.run(() => {       this.application = ember.application.create();       this.appinstance = this.application.buildinstance();       //register mock service (do not  create instance, use factory)       this.appinstance.register('service:store', storestubfactory);     });   },   aftereach: function() {     ember.run(this.appinstance, 'destroy');     destroyapp(this.application);   } });  // real test: test('it works', function(assert) {   initialize(this.appinstance);    // confirm mock service has correct payload:         assert.ok(this.appinstance.lookup('service:store').getallpayloads()); }); 

second option

of course can mock appinstance paramater of initialize function below:

import ember 'ember'; import { initialize } 'preloadtest/instance-initializers/preload'; import { module, test } 'qunit'; import destroyapp '../../helpers/destroy-app';  const storestubfactory  = ember.service.extend({   data: null,   init(){     this.data = [];   },   pushpayload(payload){       this.get('data').pushobject(payload);    },   getallpayloads(){       return this.get('data');   } });  module('unit | instance initializer | preload');  // real test: test('it works', function(assert) {   let instance = storestubfactory.create();    initialize({lookup:function(servicename){return servicename==='service:store' ? instance : null;}});     // confirm mock service has correct payload:      assert.ok(instance.getallpayloads()); }); 

but prefer use first one. stated instance-initializers behaviour to put data store provided application. in second option, seems checking instance-initializer calling lookup function of appinstance too. test more coupled implementation detail.