How to use shouldMarkInvocationsAsVerifiedInOrder method of org.mockito.internal.invocation.InvocationsFinderTest class

You can use a spy on your static class and mock only specific methods:

@RunWith(PowerMockRunner.class)
@PrepareForTest(MyStaticTest.MyStaticClass.class)
public class MyStaticTest {

public static class MyStaticClass {
    public static String getA(String a) {
        return a;
    }
    public static String getB(String b) {
        return b;
    }
}

@Test
public void should_partial_mock_static_class() throws Exception {
    //given
    PowerMockito.spy(MyStaticClass.class);
    given(MyStaticClass.getB(Mockito.anyString())).willReturn("B");
    //then
    assertEquals("A", MyStaticClass.getA("A"));
    assertEquals("B", MyStaticClass.getA("B"));
    assertEquals("C", MyStaticClass.getA("C"));
    assertEquals("B", MyStaticClass.getB("A"));
    assertEquals("B", MyStaticClass.getB("B"));
    assertEquals("B", MyStaticClass.getB("C"));
}

}

You may refactor your code a little bit. In the "Working with Legacy Code" book by Martin Fowler, he describes a technique of separating the external API (think Java Mail API) from your own application code. The technique is called "Wrap and Skin" and is pretty simple.

What you should do is simply:

1. Create an interface MySession (which is your own stuff) by extracting methods from the javax.mail.Session class.
2. Implement that interface by creating a concrete class (looking a bit like the original javax.mail.Session)
3. In each method DELEGATE the call to equivalent javax.mail.Session method
4. Create your mock class which implements MySession :-)
5. Update your production code to use MySession instead of javax.mail.Session

Happy testing!

EDIT: Also take a look at this blog post: http://www.mhaller.de/archives/18-How-to-mock-a-thirdparty-final-class.html

I can't see any synchronization in your test. Messaging is asynchronous by nature (meaning that your test can finish before the message arrives).

Try using a Latch concept, which blocks until the message arrives or until the timeout expires.

First you need a test listener bean for your queue:

@Bean
@lombok.RequiredArgsContructor
@lombok.Setter
public class TestListener {
    
    private final ReceiveOrderQueueListener realListener;
    private CountDownLatch latch;

    public void onMessage(Message message) {
        realListener.onMessage(message);
        latch.countDown();
    }
}

Make sure to configure it to be used in place of your original listener in the test context.

Then in your test you can set the latch:

public class ReceiveOrderQueueListenerTest {

    @Autowired
    private TestListener testListener;

    @Test
    public void testAbleToReceiveMessage() {
        RequestForService rfs = new RequestForService();
        rfs.setClaimNumber("a claim");

        // Set latch for 1 message.
        CountDownLatch latch = new CountDownLatch(1);  
        testListener.setLatch(latch);

        rabbitTemplate.convertAndSend("some.queue", rfs);

        // Wait max 5 seconds, then do assertions.
        latch.await(5, TimeUnit.SECONDS);
        verify(mockRepos).save(new OrderRequest());
    }
}

Note that there are better ways how to use latches (e.g. channel interceptors or LatchCountDownAndCallRealMethodAnswer with Mockito), but this is the basic idea. See Spring AMQP testing reference for more info.

Spring provides a class called MockHttpServletRequest, which can be used to test code that needs a HttpServletRequest.

public void testCheckBatchExecutionSchedule() throws Exception
{
   MockHttpServletRequest request = new MockHttpServletRequest();
   request.addParameter("parameterName", "someValue");
   assertTrue("Batch is Completed :", returnPointsRatingDisputeFrom.checkBatchExecutionSchedule(request));
}

You should avoid creating business objects with new in a Spring application. You should always get them from the application context - it will ease mocking them in your test.

In your use case, you should simply create your validator as a bean (say defaultTerminationValidator) and inject it in your controller :

public class TerminationController extends AbstractController {

    private TerminationValidator terminationValidator;

    @Autowired
    public setDefaultTerminationValidator(TerminationValidator validator) {
        this.terminationValidator = validator;
    }

    @InitBinder("termination")
    public void initBinder(WebDataBinder binder, HttpServletRequest request) {
        binder.setValidator(terminationValidator);
        binder.setAllowedFields(new String[] { "termId[**]", "terminationDate",
                "accountSelection", "iban", "bic" });
    }

    [...]
}

That way, you will be able to simply inject a mock in your test.

As of Java 11, WildFly 14+ and Mockito 2.23.0+, adding jdk.unsupported module dependency to your WAR solves the problem. You can do this in two ways:

A. META-INF/MANIFEST.MF

Add the following line to META_INF/MANIFEST.MF of your WAR archive:

Dependencies: jdk.unsupported

Note that the file must end with a new line or carriage return.

Here is how you'd typically do it with ShrinkWrap/Arquillian:

@Deployment
public static WebArchive createDeployment() {
    return ShrinkWrap.create(WebArchive.class, "my-app.war")
        .addPackages(true, Mockito.class.getPackage(), Objenesis.class.getPackage(), ByteBuddy.class.getPackage())
        .addAsManifestResource(new StringAsset("Dependencies: jdk.unsupported\n" /* required by Mockito */), "MANIFEST.MF");
}

B. WEB-INF/jboss-deployment-structure.xml

Add the following content to WEB-INF/jboss-deployment-structure.xml of your WAR archive:

<jboss-deployment-structure>
  <deployment>
    <dependencies>
      <module name="jdk.unsupported" />
    </dependencies>
  </deployment>
</jboss-deployment-structure>

It is quite easy with Mockito:

@RunWith(MockitoJUnitRunner.class)
public class RuleIdValidatorTest {
    @Mock
    private RuleStore ruleStoreMock;

    @InjectMocks
    private RuleIdValidator ruleIdValidator;

    @Test
    public void someTest() {
        when(ruleStoreMock.doSomething("arg")).thenReturn("result");

        String actual = ruleIdValidator.doSomeThatDelegatesToRuleStore();

        assertEquals("result", actual);
    }
}

Read more about @InjectMocks in the Mockito javadoc or in a blog post that I wrote about the topic some time ago.

Available as of Mockito 1.8.3, enhanced in 1.9.0.

Actually, the old style of exception testing is to wrap a try block around the code that throws the exception and then add a fail() statement at the end of the try block. Something like this:

public void testNullParameter() {
    try {
        IPAddress addr = new IPAddress(null);
        fail("InvalidIPAddressException not thrown.");
    } catch(InvalidIPAddressException e) {
        assertNotNull(e.getMessage());
    }
}

This isn't much different from what you wrote but:

1. Your assertTrue(addr.getOctets() == null); is useless.
2. The intend and the syntax are clearer IMO and thus easier to read.

Still, this is a bit ugly. But this is where JUnit 4 comes to the rescue as exception testing is one of the biggest improvements in JUnit 4. With JUnit 4, you can now write your test like this:

@Test (expected=InvalidIPAddressException.class) 
public void testNullParameter() throws InvalidIPAddressException {
    IPAddress addr = new IPAddress(null);
}

Nice, isn't it?

Now, regarding the real question, if I don't expect an exception to be thrown, I'd definitely go for way #1 (because it's less verbose) and let JUnit handle the exception and fail the test as expected.

HttpSession is an interface, so you'll need to either write your own implementation of it, or mock it. I would recommend mocking it with Mockito, then stubbing getAttribute and setAttribute to delegate to a HashMap, or some other suitable structure.

So in your test class, you'll have fields for

• your mocked HttpSession,
• a real HashMap<String,Object>

and you'll use Answer<Object> objects for each of getAttribute and setAttribute. Each Answer will just delegate the call off to the HashMap.

You could set all this up either in a @Before method, or in a @Test method like this.

@Mock private HttpSession mockHttpSession;
Map<String,Object> attributes = new HashMap<String,Object>();

@Test
public void theTestMethod() {

    Mockito.doAnswer(new Answer<Object>(){
        @Override
        public Object answer(InvocationOnMock invocation) throws Throwable {
            String key = (String) invocation.getArguments()[0];
            return attributes.get(key);
        }
    }).when(mockHttpSession).getAttribute(anyString());

    Mockito.doAnswer(new Answer<Object>(){
        @Override
        public Object answer(InvocationOnMock invocation) throws Throwable {
            String key = (String) invocation.getArguments()[0];
            Object value = invocation.getArguments()[1];
            attributes.put(key, value);
            return null;
        }
    }).when(mockHttpSession).setAttribute(anyString(), any());