[mocktio] 模拟测试框架

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

mock object with mock(Class);

List mockedList = mock(List.class);

可以使用 when(obj.somemethod())

List mockedList = mock(List.class);

verify(mockedList).add("one");//验证方法调用，可用atLeast,atMost,time，never等

when(mockedList.get(0)).thenReturn("first"); //模拟返回值,亦可使用doReturn().when

when(mockedList.get(1)).thenThrow(new RuntimeException()); //模拟抛出异常 doThrow().when

when(mockedList.get(anyInt())).thenReturn("element"); //argument matcher，参见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"); //验证mock对象的调用顺序

@Mock private UserProvider userProvider;//mock注解，必须在baseclass中MockitoAnnotations.initMocks(testClass);

when(mock.someMethod("some arg")).thenThrow(new RuntimeException()).thenReturn("foo");//连续迭代调用mock方法时的返回值，也可这样：when(mock.someMethod("some arg")).thenReturn("one", "two", "three");

List list = new LinkedList();
List spy = spy(list); //模拟一个真实的object，在1.8版本之后。mock对象无法模拟真实的函数，会overwirte所有方法，除却stub的方法，其余方法都无法模拟真实对象，spy对象可以使用真实的object和stub方法，
//可调用when(mock.someMethod()).thenCallRealMethod();实现部分mock，可以使用@Spy

ArgumentCaptor<Person> argument = ArgumentCaptor.forClass(Person.class);
verify(mock).doSomething(argument.capture()); //验证调用的参数是否正确，可以使用@Captor
 assertEquals("John", argument.getValue().getName());

 可以使用//given //when //then 风格