我是GWT MVP模式的新手,该模式具有带有GIN组合的Activities和Places。我已经开始尝试使用Mockito为我的GWT项目编写一个JUnit测试用例。很多博客建议我不要使用GWT测试用例,因为它的性能,所以我计划坚持使用Mockito。我正在为其中一位演示者编写一个测试用例。由于我使用GIN为Presenter中的大多数内容创建实例,所以我必须模拟我的GinInjector对象。我的Junit测试用例不允许我模拟杜松子酒注射器。我在某个地方读到,我们不能在Junit测试用例中使用Gin,而是必须使用Guice。我的问题是,我如何使用Mockito模拟我的杜松子酒注射器?我发现一些测试用例使用了与我的项目完全相同的模式,只是他们使用了客户端工厂。在测试用例中,我未能用GIN替换客户端工厂。我在网上找到的代码如下,我必须在测试用例中将ClientFactory替换为GIN注入器。
@RunWith(MockitoJUnitRunner.class)公共类ContactListActivityTest{
@Mock
private IClientFactory clientFactoryMock;
@Mock
private PlaceController placeControllerMock;
@Mock
private IContactListView contactListViewMock;
@Mock
private AcceptsOneWidget acceptsOneWidgetMock;
@Mock
private IContactServiceAsync contactServiceAsyncMock;
@Mock
private EventBus eventBusMock;
private List<Contact> contacts;
private Contact contact1;
private Contact contact2;
@SuppressWarnings("unchecked")
@Before
public void setUp() throws Exception {
when(clientFactoryMock.getPlaceController()).thenReturn(placeControllerMock);
when(clientFactoryMock.getContactListView()).thenReturn(contactListViewMock);
when(clientFactoryMock.getContactService()).thenReturn(contactServiceAsyncMock);
Answer<Void> answer = new Answer<Void>() {
@Override
public Void answer(InvocationOnMock invocation) {
Object[] args = invocation.getArguments();
AsyncCallback<List<Contact>> asyncCallback = (AsyncCallback<List<Contact>>) args[0];
contact1 = new Contact();
contact1.setFirstName("Kai");
contact1.setLastName("Toedter");
contact1.setEmail("kai@toedter.com");
contact2 = new Contact();
contact2.setFirstName("Kai2");
contact2.setLastName("Toedter2");
contact2.setEmail("kai2@toedter.com");
final List<Contact> contacts2 = new ArrayList<Contact>();
contacts2.add(contact1);
contacts2.add(contact2);
asyncCallback.onSuccess(contacts2);
return null;
}
};
doAnswer(answer).when(contactServiceAsyncMock).getAllContacts(any(AsyncCallback.class));
// set the real contacts object, when clientFactory.setContacts is
// called
Answer<Void> setContactsAnswer = new Answer<Void>() {
@Override
public Void answer(InvocationOnMock invocation) throws Throwable {
contacts = (List<Contact>) invocation.getArguments()[0];
// System.out.println("answer() to setContacts(): " + contacts);
return null;
}
};
doAnswer(setContactsAnswer).when(clientFactoryMock).setContacts(any(List.class));
// Return the real contacts object, when clientFactory.getContacts is
// called
Answer<List<Contact>> getContactsAnswer = new Answer<List<Contact>>() {
@Override
public List<Contact> answer(InvocationOnMock invocation) throws Throwable {
return contacts;
}
};
doAnswer(getContactsAnswer).when(clientFactoryMock).getContacts();
}
@Test
public void testGotoPlace() {
ContactListActivity contactListActivity = new ContactListActivity(new ContactPlace(null), clientFactoryMock);
ContactPlace contactPlace = new ContactPlace("kai@toedter.com");
contactListActivity.goTo(contactPlace);
verify(placeControllerMock).goTo(contactPlace);
}
@Test
public void testStartWithEmptyToken() {
clientFactoryMock.setContacts(null); // force RCP
ContactListActivity contactListActivity = new ContactListActivity(new ContactPlace(""), clientFactoryMock);
contactListActivity.start(acceptsOneWidgetMock, eventBusMock);
verify(contactListViewMock).setPresenter(contactListActivity);
verify(contactListViewMock).initialize(contacts);
}
@Test
public void testStartWithToken() {
String token = "kai@toedter.com";
clientFactoryMock.setContacts(null); // force RCP
ContactListActivity contactListActivity = new ContactListActivity(new ContactPlace(token), clientFactoryMock);
contactListActivity.start(acceptsOneWidgetMock, eventBusMock);
verify(contactListViewMock).setPresenter(contactListActivity);
verify(contactListViewMock).initialize(contacts);
verify(contactListViewMock).selectInitialContact(contact1);
verify(eventBusMock).fireEvent(any(ContactViewEvent.class));
}
@Test
public void testMayStop() {
ContactListActivity contactListActivity = new ContactListActivity(new ContactPlace(null), clientFactoryMock);
contactListActivity.start(acceptsOneWidgetMock, eventBusMock);
contactListActivity.mayStop();
verify(contactListViewMock).setPresenter(null);
}
@Test
public void clientFactoryTest() {
List<Contact> testList = new ArrayList<Contact>();
clientFactoryMock.setContacts(testList);
Assert.assertNotNull(clientFactoryMock.getContacts());
}
}
请帮忙。
如果您的代码依赖于Ginjector
,那么您就有一个问题:您没有注入直接依赖项。如果您需要一个对象工厂,请注入一个Provider
。
但在您的情况下,IClientFactory
还充当共享状态、值持有者或List<Contact>
的本地缓存;这意味着CCD_ 5违反了单一责任原则。
因此,首先将本地缓存责任提取到其自己的对象(例如ContactListCache
对象或更通用的ValueHolder<List<Contact>>
)中,然后注入该对象的实例
当然,直接注入PlaceController
、视图和GWT-RPC服务。
但实际上,我会更进一步,重构代码以从缓存中提取检索,或者要求服务器将责任放入其自己的ContactListHolder
对象中(或者,当您使用GWT-RPC时,您可以将IContactServiceAsync
接口实现为GWT.create()
生成的接口的包装器,并添加缓存行为;请参阅http://www.google.com/events/io/2009/sessions/GoogleWebToolkitBestPractices.html以获得一些灵感)。这将大大简化活动的代码。
顺便说一句,这段代码可能过于使用了嘲讽:为什么不使用真正的PlaceController
(以及spy()
的goTo(Place)
方法)和SimpleEventBus
或CountingEventBus
呢?
我所做的是使用GwtLockito,它是Mockito的扩展。在我使用注入器的唯一一个类中,我的测试看起来像这个
@RunWith(GwtMockitoTestRunner.class)
public class AppControllerTest {
AppController controller;
@Mock
EventBus eventBus;
@Mock
AppInjector injector;
@Before
public void setUp() throws Exception {
}
@Test
public void shouldUseInjector() throws Exception {
// Given
controller = new AppController(eventBus, injector);
// When
controller.go();
// Verify
verify(injector).mainPresenter();
}
}