[mocktio] 模擬測試框架

http://docs.mockito.googlecode.com/hg/org/mockito/Mockito.html

 

mock object with mock(Class);

 

List mockedList = mock(List.class);

可使用 when(obj.somemethod())

List mockedList = mock(List.class);

verify(mockedList).add("one");//驗證方法調用，可用atLeast,atMost,time，never等

when(mockedList.get(0)).thenReturn("first"); //模擬返回值,亦可以使用doReturn().when

when(mockedList.get(1)).thenThrow(new RuntimeException()); //模擬拋出異常 doThrow().when

when(mockedList.get(anyInt())).thenReturn("element"); //argument matcher，參見matcher class http://docs.mockito.googlecode.com/hg/org/mockito/Matchers.html

InOrder inOrder = inOrder(firstMock, secondMock);
inOrder.verify(firstMock).add("was called first");
inOrder.verify(secondMock).add("was called second"); //驗證mock對象的調用順序

@Mock private UserProvider userProvider;//mock註解，必須在baseclass中MockitoAnnotations.initMocks(testClass);

when(mock.someMethod("some arg")).thenThrow(new RuntimeException()).thenReturn("foo");//連續迭代調用mock方法時的返回值，也可這樣：when(mock.someMethod("some arg")).thenReturn("one", "two", "three");

List list = new LinkedList();
List spy = spy(list); //模擬一個真實的object，在1.8版本以後。mock對象沒法模擬真實的函數，會overwirte全部方法，除卻stub的方法，其他方法都沒法模擬真實對象，spy對象可使用真實的object和stub方法，
//可調用when(mock.someMethod()).thenCallRealMethod();實現部分mock，可使用@

ArgumentCaptor<Person> argument = ArgumentCaptor.forClass(Person.class);
verify(mock).doSomething(argument.capture()); //驗證調用的參數是否正確，可使用@
 assertEquals("John", argument.getValue().getName());

 可使用//given //when //then 風格SpyCaptor