Mockito cannot mock the final method. Mocking Method is certainly an issue. Undesired invocation: However, I am getting nullpointer exception. Well occasionally send you account related emails. Why did DOS-based Windows require HIMEM.SYS to boot? parentFeedReader.pullAndProcessAllFeeds(); catch(Exception e) Most of the people just forget to specify the test runner, running class for mocking. [Solved] Mockito - NullpointerException when stubbing | 9to5Answer In my case i forgot to initialize my variables effectively THANK YOU !! Thanks for the help and suggestions! You signed in with another tab or window. And so the dependencies inside the MyClass remained null causing a null reference exception to be thrown once used. Use Mockito to mock some methods but not others, Mockito test a void method throws an exception. Therefore, I would be inclined to close this issue as WontFix, unless @nguyenquoc you are mocking a non-java.lang. Here is a sample of what I think you could do if you are using mockito only and dont need to instantiate a spring container (used a single class for ease of example dont do this in actual code): If you need an example via Spring using MockBean or without and dependencies, let me know and I can post. ', referring to the nuclear power plant in Ignalina, mean? As for the error occuring when not mocking core classes. Mockito 2 can handle mocking final method. The CustomerProfileService will be initialized before the mocks are created, therefore, the repository will be null. Mockito: Trying to spy on method is calling the original method. test.zip. The text was updated successfully, but these errors were encountered: We are going to need a small reproduction case for us to debug this problem. In my case I am mocking an interface, final is not involved. I tried to add a mock for two other classes in my code and the DBConnectionManager mocked objects always return null. Yes, indeed, now I found one mock of the Method which indeed the culprit. * is unsupported, as Mockito itself is based on these classes. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. Probably you don't know what to return, or you need to return an also mocked object instance but as such, it is impossible to repair your code without implementing something completely different to your intention. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. return new GatewayResponse(HttpStatus.NO_CONTENT,product, Message.SUCCESS.getDesc()); Your tests are making large assumptions that they have each object (non null) returned from the previous call. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. getUnsuccessfulCallData(false, syncMessage) throws Null Pointer Exception which is inside subscribe of fun syncLocalOrders(syncOrders: SyncOrders). The text was updated successfully, but these errors were encountered: verify(view).hideProgressDialog()implicitly means the same as verify(view, times(1)).hideProgressDialog(). If you're using Scala and you try to create an any matcher on a value class, you'll get an unhelpful NPE. after all the above failed this import was the one which worked. @BeforeEach helped me here but it always depends on execution context. We can also configure Spy to throw an exception the same way we did with the mock: 6. Most spring boot applications have a class @SpringBootApplication annotation somewhere that will be found when the test is launched. It's important to note that we should only use it in a test class. I was using wrong annotation/import of Mock, so my object was not getting formed. MockitoExtension does not have a callback for @BeforeAll. We are using in our project mockito long time. This doesnt answer the OP's original query, but its here to try help others with Mockito null pointer exceptions (NPE). Why are players required to record the moves in World Championship Classical games? Unlike the mock() method, we need to enable Mockito annotations to use this annotation.. We can do this either by using the MockitoJUnitRunner to run the test, or by calling the MockitoAnnotations.initMocks() method explicitly. How do the interferometers on the drag-free satellite LISA receive power without altering their geodesic trajectory? In 5e D&D and Grim Hollow, how does the Specter transformation affect a human PC in regards to the 'undead' characteristics and spells? The right way to handle this would be to use an interface and mock that interface however I couldn't control the library where the "final" method was. When I run the below code, I get, Annotate the test class with: @ExtendWith(MockitoExtension.class). @TimvdLippe In my case I'm mocking also my own classes and get the same NPE. Here is a working example of DocumentRepositoryTest class for reference: DocumentRepositoryTest class is mocking documentRepository object. FYI: I am using following versions of Gradle dependencies: Your repository instance is mocked and thus will return null for all unstubbed method calls. Two MacBook Pro with same model number (A1286) but different year. StockController stockController; Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Getting a null pointer exception when invoking a method on a mock I have a class: open class Foo(private val bar: Bar) { fun print(): String { return bar.print() } } When I mock this class in java, I get a null pointer exception. I tried different version. Have you tried to go this way? Criteria Query Mockito unit test - NullPointerException. I was mocking Method too, but not in any test in error, not so easy to find, I have more than 300 in this project. } In your example, make sure that you have: Once I did that, the NullPointerExceptions disappeared. private StockService stockService; public GatewayResponse findProduct(String productId) { Identify blue/translucent jelly-like animal on beach, "Signpost" puzzle from Tatham's collection. Is there a generic term for these trajectories? Mockito: 3 Ways to Init Mock in JUnit 5 - Mincong Huang This answer doesn't solve OP's issue but since this post is the only one that shows up on googling this issue, I'm sharing my answer here. How do you assert that a certain exception is thrown in JUnit tests? Use one or the other, in this case since you are using annotations, the former would suffice. In my case, my Mockito annotation didn't match the JUnit Version. Making a mocked method return an argument that was passed to it. @tendomart I dont think it needs any class from atomfeed mocked since I am not even using it in the class that am testing. This doesnt answer the OP's original query, but its here to try help others with Mockito null pointer exceptions (NPE). I'm the next poor soul lol. Have a question about this project? Additionally, it is advised not to mock classes you don't own: https://github.com/mockito/mockito/wiki/How-to-write-good-tests#dont-mock-a-type-you-dont-own We are working on improving the user experience by working on a DoNotMock feature to avoid mocking classes/methods that are known to crash Mockito internals (#1833). What do hollow blue circles with a dot mean on the World Map? Check your imports, based on the usage of. I needed to tell the spring boot test where to look for the beans required for the example. We started with 1.10.19 version. When using @ExtendWith(MockitoExtension.class) make sure you're using JUnit 5: import org.junit.jupiter.api.Test; When using @RunWith(MockitoJUnitRunner.class) make sure you're using JUnit 4: import org.junit.Test; so this can be helpful to somebody who see such error. Can you please create another question on StackOverflow with a complete example. However I discarded my changes after noticing i was implementing something already presentI corrected it and PR is https://github.com/openmrs/openmrs-module-sync2/pull/149. So the class under test was unable to find its required dependencies, creating the NPE. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, please write as an answer and I'll mark it. Find centralized, trusted content and collaborate around the technologies you use most. After making function open tests started to pass. Where can I find the specification/docs for the first sentence of the answer? So for everyone else landing on this page in the future, try your best to find in your code mocking of java.lang.reflect.Method and address those tests. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. I have added the stacktrace below: ` org.mockito.exceptions.verification.TooManyActualInvocations: If I run it with SpringJUnit4ClassRunner, I get application initialization error if I change from MockBean to Mock for Consumer because the Consumer is AUTOWIRED in the service class, I added a sample using SpringJUnit4ClassRunner in combination with SpringBoots @MockBean annotation. Parameterized. Mockito: Trying to spy on method is calling the original method. Turned out, I had made the silly mistake of importing @Test from. verify(presenter).getUnsuccessfulCallData(eq(false), anyString()). By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. I used anyString() and anyBoolean() instead of any() and test passed . This can be done in qn @Before method, in your own runner or in an own rule. How do you test that a Python function throws an exception? This is documented in our wiki: https://github.com/mockito/mockito/wiki/How-to-write-good-tests#dont-mock-a-type-you-dont-own Our intention with DoNotMock is that we make this even more explicit. { To learn more, see our tips on writing great answers. I hope this helps. Product product = optional.get(); I am facing the same issue, but this time I am implementing an interface method that uses another class's method which for some reason returns null. I've managed to make a reproducer What's the cheapest way to buy out a sibling's share of our parents house if I have no cash and want to pay less than the appraised value? Could a subterranean river or aquifer generate enough continuous momentum to power a waterwheel for the purpose of producing electricity? Find centralized, trusted content and collaborate around the technologies you use most. Is there such a thing as "right to be heard" by the authorities? As this is the closest I found to the issue I had, it's the first result that comes up and I didn't find an appropriate answer, I'll post the solution here for any future poor souls: any() doesn't work where mocked class method uses a primitive parameter. For me it looks like that after the test with mocked Final class isn't correctly released and next tests instead of call of original java.lang.reflect.Method type calls it on mock. Use one or the other, in this case since you are using annotations, the former would suffice. *, as Mockito has to make extensive use of reflection to function correctly. First you don't need both @RunWith (MockitoJUnitRunner.class) and MockitoAnnotations.initMocks (this); at the same time. So I started writing tests for our Java-Spring-project. Why refined oil is cheaper than cold press oil. That's a good remark, Ridcully. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. I tend to not mock the class under test (i.e. How do you assert that a certain exception is thrown in JUnit tests? It can cover both Constructor injected & Field injected dependencies. I was struggling to understand why code works in Java but not in Kotlin. I was trying to mock a "final" method, which apparently was the problem. Based on above suggestion https://stackoverflow.com/a/55616702/2643815. Dont forget to annotate your Testing class with @RunWith(MockitoJUnitRunner.class). To configure the exception itself, we can pass the exception's class as in our previous examples or as an object: 5. How to force Unity Editor/TestRunner to run at full speed when in background? https://github.com/mockito/mockito/wiki/FAQ, Junit 5 with InjectMocks. Any chance to get an error or a warning for these classes if we try to mock them? This worked for me. mock instance is null after @Mock annotation - Stack Overflow You need to instantiate the routingClientMock e.g. What is Wario dropping at the end of Super Mario Land 2 and why? You can use our Bintray repository which hosts all of our versions to hopefully determine the exact version at which things start to break: https://bintray.com/mockito/maven/mockito. For example: Or alternatively, you can specify a different default answer when creating a mock, to make methods return a new mock instead of null: RETURNS_DEEP_STUBS. So instead of when-thenReturn , you might type just when-then. privacy statement. Does the order of validations and MAC with clear text matter? Because I assume that the field to mock is never mocked. You haven't mocked the behavior of getId in externalDependencyObject therefore it is returning null and giving you the NPE when toString() is called on that null. In this article, we explored how to configure method calls to throw an exception in Mockito. Where does the version of Hamapil that is different from the Gemara come from? And Inside that method write MockitoAnnotations.initMocks(this), If you don't want to use MockitoAnnotations.initMocks(this), you can use MockitoJunitRunner, Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. I see that when the, When AI meets IP: Can artists sue AI imitators? How to force Unity Editor/TestRunner to run at full speed when in background? Mocking Exception Throwing using Mockito | Baeldung Verify Method called throws Null Pointer exception. #271 - Github I see that when the someDao.findMe (someObject.getId.toString ()) execute it does NOT trigger my MockDao return statement, but instead tries to evaluate someObject.getId.toString (). P.S You need to think which class you actually want to test, that determines which instances should be mocked. Why is printing "B" dramatically slower than printing "#"? THANK YOU!!!! The issue was that the activity that I was testing extended AppCompatActivity instead of Activity. If not share your stack trace as well as the code you are running. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. However I'm trying to mock a net.sf.ehcacheCache object. rev2023.5.1.43405. Also, always include the full stack trace if there is one, and try to remove as much noise as possible from the code that has no relation to the issue. 566), Improving the copy in the close modal and post notices - 2023 edition, New blog post from our CEO Prashanth: Community is the future of AI. Spy. When generating a mock, we can simulate the target object, specify its behavior, and finally verify whether it's used as expected. Sign up for a free GitHub account to open an issue and contact its maintainers and the community. I hope it helps. For example, the "org.easymock" package also does have an annotation called @Mock, which of course, won't work with Mockito specific setup. Thanks for contributing an answer to Stack Overflow! Especially when for String you got error but for java.lang.reflect. when(stockService.getProduct(productId)).thenReturn(Optional.of(product)); Mockito - NullpointerException when stubbing Method the method needs to be marked open for this to work: Marking the method open, makes it work! This mean you should explicitly use doCallRealMethod (yourMock).when (yourMethod ()) if you want the mock's method to behave like it normally would.