用mockito嘲笑GWT EventBus [英] mocking GWT EventBus with mockito

问题描述

我在执行EventBus的SimpleEventBus实现时遇到了一些问题：
我有一个活动，它也是特定事件的处理程序。

代码：

  @Mock私人AssetCellList视图; 
 @Mock private AcceptsOneWidget面板; 
 @Mock private SelectionModel< Asset> selectionModel设置; 
 @Mock private HasData< Asset> cellList; 
 @Mock私人AssetService服务; 
 @Mock私人资产资产; 
 @Mock私人列表< Asset>列表; 
 @Mock private AssetListDTOClientImpl assetDTO; 
 @Mock private AssetEvent事件; 
 
 
 @Before 
 public void setUp（）抛出异常{
 MockitoAnnotations.initMocks（this）; 
 
 
 @Test 
 public void test（）{
 
 
 / *一些stubbing * / 
 when（view .getSelectionModel（））thenReturn（selectionModel的）。 
 when（view.getList（））。thenReturn（cellList）; 
 when（assetDTO.getAssetList（））。thenReturn（list）; 
 when（assetDTO.getAssetList（）。get（anyInt（）））。thenReturn（asset）; 
 when（event.getAssetDTO（））。thenReturn（assetDTO）; 
 
 
 / *创建真实EventBus * / 
 EventBus eventBus = new SimpleEventBus（）; 
 
 / *创建活动* / 
 AssetListActivity activity = new AssetListActivity（eventBus，
 view，
 service）; 
 
 / *侦测eventBus * / 
 EventBus eventBusSpy = spy（eventBus）; 
 / *监视活动* / 
 AssetListActivity activitySpy = spy（activity）; 
 
 
 / *开始活动* / 
 activity.start（panel）; 
 
 / *验证服务电话 - > OK * / 
 verify（service，times（1））。getAssets（anyInt（））; 
 
 / *模拟最终引发事件的服务* / 
 eventBus.fireEvent（event）; 
 
 / *验证eventBus确实触发了事件 - > NO OK * / 
 verify（eventBusSpy，times（1））。addHandler（eq（AssetEvent.TYPE），isA（AssetEventHandler.class））; 
 
 / *稍后验证* / 
验证（activitySpy）.onAssetsReceived（event）; 
 
 
 
 
 
 
 
错误追踪在eventBusSpy验证中说： 
 
 
 通缉但未调用：
 simpleEventBus.addHandler（
事件类型，
 isA（猫.ccma.testproject.client.events.AssetEventHandler）
）; 
  - >在cat.ccma.testproject.client.AssetListTest.test（AssetListTest.java:87）
其实，这个模拟与零交互。 
  
谢谢。  
解决方案
 
 
 
请注意，您也可以使用  com .google.gwt.event.shared.testing.CountingEventBus  这是一个简单的 EventBus （使用新的除了传递一个 EventBus 实例进行包装）以及添加一个 getCount（GwtEvent.Type）的SimpleEventBus  code>方法。 
然后执行 assertEquals（1，countingEventBus.getCount（AssetEvent.TYPE））;  
 
I have some problems spying on a real SimpleEventBus implementation of EventBus:
I have an activity which is also a handler for a specific event. This event is fired by a service.

The code:
    @Mock private AssetCellList view;
    @Mock private AcceptsOneWidget panel;
    @Mock private SelectionModel<Asset> selectionModel;
    @Mock private HasData<Asset> cellList;
    @Mock private AssetService service;
    @Mock private Asset asset;
    @Mock private List<Asset> list;
    @Mock private AssetListDTOClientImpl assetDTO;
    @Mock private AssetEvent event;


    @Before
    public void setUp() throws Exception {
        MockitoAnnotations.initMocks(this);
    }

    @Test 
    public void test(){


        /*Some stubbing*/
        when(view.getSelectionModel()).thenReturn(selectionModel);
        when(view.getList()).thenReturn(cellList);
        when(assetDTO.getAssetList()).thenReturn(list);
        when(assetDTO.getAssetList().get(anyInt())).thenReturn(asset);
        when(event.getAssetDTO()).thenReturn(assetDTO);


        /*Creatin the Real EventBus*/
        EventBus eventBus = new SimpleEventBus();

        /*Creating the activity */
        AssetListActivity activity = new AssetListActivity(eventBus, 
                view,
                service);

        /*Spying the eventBus*/
        EventBus eventBusSpy = spy(eventBus);
        /*Spying the activity*/
        AssetListActivity activitySpy = spy(activity);


        /*Starting the activity*/
        activity.start(panel);

        /*verifying the service call -> OK */
        verify(service, times(1)).getAssets(anyInt());

        /*Simulating the service which eventually fires an event*/
        eventBus.fireEvent(event);

        /*verifying that the eventBus really fires the event --> NO OK*/
        verify(eventBusSpy, times(1)).addHandler( eq( AssetEvent.TYPE ),                      isA(AssetEventHandler.class));

        /*later verifiction*/
        verify(activitySpy).onAssetsReceived(event);

    }
The error trace is in th eventBusSpy verification and says:
Wanted but not invoked:
simpleEventBus.addHandler(
    Event type,
    isA(cat.ccma.testproject.client.events.AssetEventHandler)
);
-> at cat.ccma.testproject.client.AssetListTest.test(AssetListTest.java:87)
Actually, there were zero interactions with this mock.
Thank You.
解决方案
Shouldn't you pass the spied instance to your activity, instead of spying it afterwards?

Note you can also use a com.google.gwt.event.shared.testing.CountingEventBus which is a simple EventBus (uses new SimpleEventBus unless you pass an EventBus instance to be wrapped) with the addition of a getCount(GwtEvent.Type) method.
You'd then do an assertEquals(1, countingEventBus.getCount(AssetEvent.TYPE));

                        
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