Aurelia：單元測試事件聚合器

作爲一名Angular（2）開發人員，我最近開始嘗試使用Aurelia。真的很喜歡它.. 但我真的有一些困難，單元測試Aurelia的Event Aggregator。這是我目前所擁有的，但是它現在不會在我的控制器中觸發事件。我現在做錯了，一些幫助會很棒！Aurelia：單元測試事件聚合器

// app.js 

@inject(UserService, EventAggregator) 
export class App { 
    constructor(userService, eventAggregator) { 
     this.userService = userService; 
     this.eventAggregator = eventAggregator; 
     this.authorizedUser = null; 

     // get authorized user 
     this.getAuthorizedUser(); 

     // subscribe to events 
     this.eventAggregator.subscribe(EVENTS.USER_LOGGED_IN, data => { 
      this.authorizedUser = data; 
     }); 
    } 

    // calls userService and sets this.authorizedUser; 
    getAuthorizedUser() { 
     .... 
    } 
}

而且我的規格目前看起來是這樣的：

describe('app',() => { 
    let component, 
     createComponent, 
     eventAggregator = new EventAggregator(), 
     userService = new UserService(); 

    beforeEach(() => {  
     component = StageComponent.withResources('app').inView('<app></app>'); 
     component.bootstrap(aurelia => { 
      aurelia.use.standardConfiguration(); 
      aurelia.container.registerInstance(UserService, userService); 
      aurelia.container.registerInstance(EventAggregator, eventAggregator); 
     }); 

     createComponent = component.create(bootstrap); 
    }); 

    // this one is working for example.. 
    it('should get authorized user when token is set', (done) => { 
     const result = 'some value'; 

     spyOn(UserService, 'getToken').and.returnValue(true); 
     spyOn(userService, 'getAuthorizedUser').and.returnValue(Promise.resolve('some value')); 

     createComponent.then(() => { 
      const viewModel = component.viewModel; 
      expect(viewModel.authorizedUser).toEqual(result); 
      done(); 
     }); 
    }); 

    // this one is failing (depending on Event Aggregator) 
    it('should set authorized user when LOGGED_IN event is fired', (done) => { 
     spyOn(UserService, 'getToken').and.returnValue(false); 

     createComponent.then(() => { 
      const viewModel = component.viewModel; 
      expect(viewModel.authorizedUser).toEqual(null); 

      eventAggregator.publish(EVENTS.USER_LOGGED_IN, 'some value'); 
      expect(viewModel.authorizedUser).toEqual('some value'); 
      done(); 
     }); 
    }); 

    afterEach(() => { 
     component.dispose(); 
    }); 


});

來源

2017-04-21 Aico Klein Ovink

你檢查了EventAggregator的實例嗎？他們肯定是一樣的嗎？我想他們應該，因爲你註冊了它的一個實例。不過，你可以嘗試'registerSingleton（）'，但我認爲它應該沒有區別。 –

這個問題是因爲你使用'新的EventAggregator'。你的類需要使用EventAggregator類的__same__實例。另外 - 我猜'EVENTS.USER_LOGGED_IN'是某種字符串？ – Tom

@thebluefox感謝您的回覆，是的，它是一個從常量導入的字符串。還更新回答我的問題（對我來說）工作解決方案。謝謝你的時間！ –

所以一些試驗和錯誤之後，我發現瞭如何單元測試上面的代碼。它並不是真正遵循Aurelia的文檔，但我對這種測試方式非常滿意。希望這可能會幫助你們中的一些人。不知道這是正確的方式，但它適用於我。請評論你的想法..

describe('app',() => { 
    let sut, 
     userServiceMock, 
     eventAggregator; 

    beforeEach(() => { 
     userServiceMock = new UserServiceMock(); // use a mock for the original service 
     eventAggregator = new EventAggregator(); 
     sut = new App(userServiceMock, eventAggregator); 
    }); 

    describe('subscribing to events',() => { 

     it('should set authorized user when LOGGED_IN event is fired', done => { 
      const authUser = {someKey: 'someValue'}; 

      // expect initial values 
      expect(sut.authorizedUser).toEqual(null); 

      // publish an event  
      eventAggregator.publish(EVENTS.USER_LOGGED_IN, authUser); 
           //^this is just a string constant 

      // expect the values changes triggered by the event 
      expect(sut.authorizedUser).toEqual(authUser); 

      done(); 
     }); 
    }); 

    afterEach(() => { 
     // sut.dispose() doesn't work here, still need to figure this out 
    }); 

});

來源

2017-04-25 17:22:17

Aurelia：單元測試事件聚合器

回答

相關問題