我有一个方法被调用了两次，我想捕获第二次方法调用的参数。
以下是我的尝试:
ArgumentCaptor<Foo> firstFooCaptor = ArgumentCaptor.forClass(Foo.class);
ArgumentCaptor<Foo> secondFooCaptor = ArgumentCaptor.forClass(Foo.class);
verify(mockBar).doSomething(firstFooCaptor.capture());
verify(mockBar).doSomething(secondFooCaptor.capture());
// then do some assertions on secondFooCaptor.getValue()
但是我得到了一个TooManyActualInvocations异常，因为Mockito认为doSomething应该只被调用一次。
如何验证doSomething的第二次调用的参数?
当前回答
我觉得应该是
verify(mockBar, times(2)).doSomething(...)
来自mockito javadoc的示例:
ArgumentCaptor<Person> peopleCaptor = ArgumentCaptor.forClass(Person.class);
verify(mock, times(2)).doSomething(peopleCaptor.capture());
List<Person> capturedPeople = peopleCaptor.getAllValues();
assertEquals("John", capturedPeople.get(0).getName());
assertEquals("Jane", capturedPeople.get(1).getName());
其他回答
自Mockito 2.0以来，也有可能使用静态方法Matchers.argThat(ArgumentMatcher)。在Java 8的帮助下，现在写起来更清晰，可读性更高:
verify(mockBar).doSth(argThat((arg) -> arg.getSurname().equals("OneSurname")));
verify(mockBar).doSth(argThat((arg) -> arg.getSurname().equals("AnotherSurname")));
如果你使用的是低Java版本，也没有那么糟糕:
verify(mockBar).doSth(argThat(new ArgumentMatcher<Employee>() {
@Override
public boolean matches(Object emp) {
return ((Employee) emp).getSurname().equals("SomeSurname");
}
}));
当然，这些都不能验证调用的顺序-你应该使用InOrder:
InOrder inOrder = inOrder(mockBar);
inOrder.verify(mockBar).doSth(argThat((arg) -> arg.getSurname().equals("FirstSurname")));
inOrder.verify(mockBar).doSth(argThat((arg) -> arg.getSurname().equals("SecondSurname")));
请看看mockito-java8项目，它可以进行如下调用:
verify(mockBar).doSth(assertArg(arg -> assertThat(arg.getSurname()).isEqualTo("Surname")));
你也可以使用@Captor注解ArgumentCaptor。例如:
@Mock
List<String> mockedList;
@Captor
ArgumentCaptor<String> argCaptor;
@BeforeTest
public void init() {
//Initialize objects annotated with @Mock, @Captor and @Spy.
MockitoAnnotations.initMocks(this);
}
@Test
public void shouldCallAddMethodTwice() {
mockedList.add("one");
mockedList.add("two");
Mockito.verify(mockedList, times(2)).add(argCaptor.capture());
assertEquals("one", argCaptor.getAllValues().get(0));
assertEquals("two", argCaptor.getAllValues().get(1));
}
我觉得应该是
verify(mockBar, times(2)).doSomething(...)
来自mockito javadoc的示例:
ArgumentCaptor<Person> peopleCaptor = ArgumentCaptor.forClass(Person.class);
verify(mock, times(2)).doSomething(peopleCaptor.capture());
List<Person> capturedPeople = peopleCaptor.getAllValues();
assertEquals("John", capturedPeople.get(0).getName());
assertEquals("Jane", capturedPeople.get(1).getName());
如果你不想验证所有对doSomething()的调用，只验证最后一个，你可以使用ArgumentCaptor.getValue()。根据Mockito javadoc:
如果该方法被多次调用，那么它将返回最新捕获的值
所以这将工作(假设Foo有一个方法getName()):
ArgumentCaptor<Foo> fooCaptor = ArgumentCaptor.forClass(Foo.class);
verify(mockBar, times(2)).doSomething(fooCaptor.capture());
//getValue() contains value set in second call to doSomething()
assertEquals("2nd one", fooCaptor.getValue().getName());
使用Java 8的lambdas，一种方便的方法就是使用它
org.mockito.invocation.InvocationOnMock
when(client.deleteByQuery(anyString(), anyString())).then(invocationOnMock -> {
assertEquals("myCollection", invocationOnMock.getArgument(0));
assertThat(invocationOnMock.getArgument(1), Matchers.startsWith("id:"));
}
