获取“InvalidUseofMatcherException”,即使它使用正确

匹配方法,如 anyObject() eq() 不要 anyObject() , 等式()

我的建议是 any()

例如

@Test
public void TestObjectMapper() {
    //Arrange
    ObjectMapper objectMapper = mock(ObjectMapper.class);
    when(objectMapper.writeValueAsString(any()))
        .thenThrow(new JsonProcessingException());

    //...
}

我将@InjectMocks用于被测试的类,而@Mock用于自动创建和注入Mock。这对我来说非常好。

像这样:

@RunWith(MockitoJUnitRunner.class)
public final class ClassTest{

    @InjectMocks
    private ClassUnderTest objectOfClass;

    @Mock 
    private ObjectMapper objectMapper = new ObjectMapper();

    @Test (expected = JsonProcessingException.class)
    public void testMethod() {
        when(objectMapper.writeValueAsString(anyObject()))
       .thenThrow(JsonProcessingException.class);
    }
}

when(mock.doSomething(any(), someMock)).thenReturn(something); // This can generate the exception.

when(mock.doSomething(any(),eq(someMock))).thenReturn(something); // Here we use eq matcher instead of simply passing the mock