使用Mockito验证是否使用包含子字符串的参数调用了方法

Question

When logger.error is called, there are many different things that can be passed as the 3rd argument.

How can I verify that e contains a specific substring?

This is my production code ..

public class MyClass {

    private ILogger logger = Slf4jLogbackLogger
            .generateLogger(MyClass.class.getClassLoader().getResource("log_messages.properties"));

    public void doSomething() {
        logger.info(Optional.empty(), "MyClass.doSomething");

        try {
            .. do things // throw new RuntimeException("something");

        } catch (Exception e) {
            logger.error(Optional.empty(), "HANDLE_EXCEPTION", e);
        }
    }
}

My test code ..

@RunWith(MockitoJUnitRunner.class)
public class TestMyClass {

    @Mock
    private ILogger logger;

    @InjectMocks
    @Spy
    private MyClass myClass = new MyClass();

    @Before
    public void init() throws Exception {
        MockitoAnnotations.initMocks(this);
    }

    @Test
    public void testMyClass() throws Exception {

        try {
            myClass.doSomething();
        } catch (Exception e) {
            fail("Should not have thrown any exceptions");
        }
        Mockito.verify(logger, Mockito.times(1)).error(Optional.empty(), "HANDLE_EXCEPTION", "Contains something specific");
    }
}

This is the error I'm recieving ..

org.mockito.exceptions.misusing.InvalidUseOfMatchersException: 
Invalid use of argument matchers!
3 matchers expected, 1 recorded:

This exception may occur if matchers are combined with raw values:
    //incorrect:
    someMethod(anyObject(), "raw String");
When using matchers, all arguments have to be provided by matchers.
For example:
    //correct:
    someMethod(anyObject(), eq("String by matcher"));

Have tried things like below, but same error:

ArgumentCaptor<String> argument = ArgumentCaptor.forClass(String.class);
Mockito.verify(logger, Mockito.times(1)).error(Optional.empty(), "HANDLE_EXCEPTION", argument.capture());

Answer 1

All arguments during veryfying that error method was called on logger need to be matchers in your case. Here is an example of using matchers and mocking some Service class :

@ExtendWith(MockitoExtension.class)
public class SomeTestClass {

    private static class MyService {
        public void error(Optional<String> op, String msg1, String msg2) {

        }
    }

    @Test
    void testMethod() {
        MyService myService = Mockito.mock(MyService.class);
        myService.error(Optional.empty(), "This is error", "Some error appeared");
        Mockito.verify(myService, Mockito.times(1)).error(Mockito.any(), Mockito.eq("This is error"), Mockito.contains("error"));
    }
}

Here Mockito.any() , Mockito.eq() , Mockito.contains() are methods that return matchers.

To assert that method was invoked with String containing given substring use Mockito.contains() matcher. Here you can find more information about using Matchers .