14

生成示例应用程序后:

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

使用以下文件:

模型/测试数据.js

import DS from 'ember-data';

export default DS.Model.extend({
  name: DS.attr('string'),
  value: DS.attr( 'number' )
});

路线/index.js

import Ember from 'ember';

export default Ember.Route.extend({
  model(){
    return this.store.peekAll( 'test-data' );
  }
});

实例初始化器/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
};

模板/index.hbs

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

适配器/application.js

import RESTAdapter from 'ember-data/adapters/rest';

export default RESTAdapter.extend({});

ember serve运行应用程序并显示预加载数据,但进入实例初始化程序/tests的默认单元测试失败并出现错误。preloadstore is undefined

完整的错误信息

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 is 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

如何初始化应用程序的存储以便它可以在单元测试中使用?

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

import Ember from 'ember';
import { initialize } from 'preloadtest/instance-initializers/preload';
import { module, test } from 'qunit';
import destroyApp from '../../helpers/destroy-app';
//import DS from '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 this with your real tests.
test('it works', function(assert) {
  initialize(this.appInstance);

  // you would normally confirm the results of the initializer here
  assert.ok(true);
});

有无尝试needs: [ 'service:store' ](尽管它建议如果 Ember-Data 在页面上,您不需要这样做- 我也尝试在单元测试和实例初始化程序中导入)。

版本

Ember      : 2.4.5
Ember Data : 2.5.2
4

1 回答 1

10

在实例初始化程序的单元测试中,您不需要获得真正的store服务。在这种情况下,更喜欢使用模拟服务。您的实例初始化程序的行为是将一些数据放入应用程序提供的存储中。您可以轻松地模拟该商店。

带有模拟服务的示例测试代码:

import Ember from 'ember';
import { initialize } from 'preloadtest/instance-initializers/preload';
import { module, test } from 'qunit';
import destroyApp from '../../helpers/destroy-app';

//this is the 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 your mock service (do not  create instance, use factory)
      this.appInstance.register('service:store', storeStubFactory);
    });
  },
  afterEach: function() {
    Ember.run(this.appInstance, 'destroy');
    destroyApp(this.application);
  }
});

// This is your real test:
test('it works', function(assert) {
  initialize(this.appInstance);

  // confirm that mock service has the correct payload:      
  assert.ok(this.appInstance.lookup('service:store').getAllPayloads());
});

第二种选择

当然你也可以模拟函数的appInstance参数initialize如下:

import Ember from 'ember';
import { initialize } from 'preloadtest/instance-initializers/preload';
import { module, test } from 'qunit';
import destroyApp from '../../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');

// This is your real test:
test('it works', function(assert) {
  let instance = storeStubFactory.create();

  initialize({lookup:function(serviceName){return serviceName==='service:store' ? instance : null;}}); 

  // confirm that mock service has the correct payload:   
  assert.ok(instance.getAllPayloads());
});

但我更喜欢使用第一个。我们说过,您的实例初始化器行为是将一些数据放入应用程序提供的存储中。但是在第二个选项中,我们似乎也在检查您的实例初始化程序是否也在调用 appInstance 的查找函数。该测试与您的实现细节更加耦合。

于 2016-04-28T11:07:52.323 回答