mockito mock annotation null pointer exception

All the above commented codes are not required { mockContext = Mockito.mock(Context.class);}, if you use @Mock Annotation to Context mockContext; @Mock Context mockContext; But it will work if you use @RunWith . You need to annotate the mocking object with the. It's not them. Then as if by magic, it started working for me. But for sure, NullPointerException happened because you want something which is not there. parentFeedReader.pullAndProcessAllFeeds(); Wanted 1 time: What are the arguments for/against anonymous authorship of the Gospels, Copy the n-largest files from a certain directory to the current one. Same problem can occur if you are using Junit5 since there is no more '@RunWith' annotation. You don't need SpringJUnit4ClassRunner unless you want to wire in some Spring context into your test - which is a very twisty passage of its own. Don't forget to annotate your Testing class with @RunWith (MockitoJUnitRunner.class). From first glance, I think your problem is with the Spring application context. Otherwise thanx for your input. This only happens in Android Espresso tests. privacy statement. But I mocked the consumer, why is it throwing null pointer exception and I should be skipping over that method, right? How to verify that a specific method was not called using Mockito? I removed the mocking of Method, as suggested . +1 for the "make sure your are using JUnit for all annotations"! P.S You need to think which class you actually want to test, that determines which instances should be mocked. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Undesired invocation: Which reverse polarity protection is better and why? Null pointer exception when using Mockito to mock interface 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. My issue was that I was trying to mock an object which was final in my service. I tried to do @Autowired step to since I was running into the exception of NullPointer, but it's running into exception even after that. @pyus13 This should be a new question with more code. I was using junit 4 for testing and used @BeforeEach instead of @Before while initializing. In my case i forgot to initialize my variables effectively THANK YOU !! Conclusion. Help for visitors to this question: Make sure you haven't accidentally got. NullPointerException in java.lang.reflect.Method.getParameterTypes, Add annotation to mark a type as DoNotMock, https://github.com/mockito/mockito/wiki/How-to-write-good-tests#dont-mock-a-type-you-dont-own, https://bintray.com/mockito/maven/mockito, NullPointerException when calling methods on spy of a final class with JDK > 11, Failed to mock interface in Debian but succeeded in Mac OS, Update Mockito and ByteBuddy to help with GraalVM integration, [no ticket][risk=no] Avoid mocking java.lang.reflect.Method in tests. } ". { mockContext = Mockito.mock(Context.class); }, But I want to use when()..thenReturn() to get around creating this variable and so on. To learn more, see our tips on writing great answers. The above will produce the same exact issue as OP. rev2023.5.1.43405. Stubbing Method will therefore lead to undefined behavior. Make sure the rule is also on a public class or you will receive the message: Found this solution in comments that worked for me. In my case a tested method called another method as a parameter: While repository is mocked, prefs.getUser().id) will throw NPE. { I tend to not mock the class under test (i.e. Product pr = new Product(); My tests work with Mockito 3.3.3, but fail with 3.6.0. This does not work trivially, and so the second layer mock was null. The @Mock annotation requires a test suite that searches for the annotation and gathers the information to inject the values there. Null pointers from a mock object? Newbie question. - Google Groups You should read the Javadoc of Mockito.RETURNS_DEEP_STUBS which explains this in more detail and also has some warnings about its usage. (Ep. The url value you are using to stub the HttpUrlConnection creation from HttpAdapter i.e call to httpAdapter.createHttpURLConnection doesnt match the value you are passing to pingerService.ping. I was using wrong annotation/import of Mock, so my object was not getting formed. I get a crash when I mock a method in an interface that doesn't take any parameters. I fallowed above rules correctly. xcolor: How to get the complementary color. When an object is mocked, unless stubbed all the methods return null by default. This seems so basic that I must be doing something . In Groovy, you have meta-object protocol or MOP that allows you to use meta-programming techniques. Working with EasyMock's mocks involves four steps: creating a mock of the target class. The main issue here is whenever I try to run the test syncLocalOrders_OrderNotEmptySuccessTest(), the code enters to both subscribe and throwable of fun syncLocalOrders(syncOrders: SyncOrders) (this was got by keeping breakpoints.) Most of the people just forget to specify the test runner, running class for mocking. The text was updated successfully, but these errors were encountered: You should use doReturn/when construct instead of whenever/thenReturn. When this class that contains this mocking is run alone that the test is green in Eclipse and maven too. Content Discovery initiative April 13 update: Related questions using a Review our technical responses for the 2023 Developer Survey. Can you please create another question on StackOverflow with a complete example. My issue was the last one you commented on. Conclusion. The text was updated successfully, but these errors were encountered: verify(view).hideProgressDialog()implicitly means the same as verify(view, times(1)).hideProgressDialog(). Jun 6, 2014 at 1:13. I have left comments on your draft PR. edited 17 Oct, 2020. . What is this brick with a round back and a stud on the side used for? Sign in The most widely used annotation in Mockito is @Mock. To fix this, I was able to just replace AppCompatActivity with Activity since I didn't really need it. Is there any explaination for this issue ? Make sure that method() is not declared as final: Mockito cannot mock a final method and this will come up as a wrapped NPE: Buried deep in the error message is the following: None of the above answers helped me. Connect and share knowledge within a single location that is structured and easy to search. Mockito - NullpointerException when stubbing Method 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. It is stored in surefire reports directory. 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. How to fix java.lang.UnsupportedClassVersionError: Unsupported major.minor version, Use Mockito to mock some methods but not others, Mockito test a void method throws an exception, Difference between @Mock and @InjectMocks. Not the answer you're looking for? Parameterized.. Use the MockitoRule public class MockitoTest { @Mock private IRoutingObjHttpClient routingClientMock; @Rule public MockitoRule rule = MockitoJUnit . However, maybe you want to @RunWith(SpringRunner.class) as the SpringRunner provides support for loading a Spring Application Context and having beans @Autowired into your test instance. to your account. However, I am getting nullpointer exception. String productId = pr455; Null Pointer exception passed by test method, Mockito junit testing not working- beans mocked by @mockBean are null, Mockito Null Pointer Exception and Unfinished stubbing detected, Spring Boot JUnit test beanFactory.getBean null pointer exception, Folder's list view has different sized fonts in different folders, the Allied commanders were appalled to learn that 300 glider troops had drowned at sea. When you want to use the @Mock annotation you should use the MockitoJUnitRunner. * now. Annotate the test class with: @ExtendWith(MockitoExtension.class). 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. The stack trace which is in surefire reports would show exactly what other mocks you need. When you run mvn test maven will report the location of this directory. Verify Method called throws Null Pointer exception. #271 - Github } I found that by switching to using the correct variant from mockito gets rid of the errors. i declared MockMvc object also bt didnt mension here, when debugging in StockController i am getting null pointer Exception in -> if (optional.isPresent()). I didn't check it and changed a library, sorry. //add the behavior to throw exception doThrow (new Runtime Exception ("divide operation not implemented")) .when (calcService).add (10.0,20.0); Here we've added an exception clause to a mock object. I hope it helps. Dont forget to annotate your Testing class with @RunWith(MockitoJUnitRunner.class). Not the answer you're looking for? @Service public class Service { @Autowired private Consumer<String, String> kafkaConsumer; public void clearSubscribtions () { kafkaConsumer.unsubscribe if (optional.isPresent()) { When I run the test in debug mode, I get Null Pointer Exception whenever I try to verify getUnsuccessfulCallData(false, syncMessage) is called or not. [mockito] NullPointerException thrown when mocking Groovy class private variable 'status' which is null. * is unsupported, as Mockito itself is based on these classes. How do I avoid the NullPointerException in Mockito, jUnit testing If we had a video livestream of a clock being sent to Mars, what would we see? Just note that your example code seems to have more issues, such as missing assert or verify statements and calling setters on mocks (which does not have any effect). This was my problem. Is "I didn't think it was serious" usually a good defence against "duty to rescue"? Use Mockito to mock some methods but not others, How to JUNIT a java.util.Function using Mockito, Spring 4, Mockito 2, Junit 4 in Eclipse Oxygen - DAO not mocked, NullPointerException on mockito spring's NamedParameterJdbcTemplate, the Allied commanders were appalled to learn that 300 glider troops had drowned at sea, A boy can regenerate, so demons eat him for years. Have a question about this project? 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. It can also be an import problem, so make sure you have the appropriate imported package. In you're example when (myService.getListWithData (inputData).get ()) will cause a NullPointerException because . the object in when() must be a mock created by Mockito.mock(), it does not work for manually created real objects - not sure if that's your issue, since I'm not really getting where your problem is Added some code. But why do I get Null Pointer Exception here ? 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. " @Test(expected = SyncException.class) @bohsen still getting the same issue when doReturn/when is used, updated the description with the different cases, This passes in my IDE. I don't think that's the correct approach. "Signpost" puzzle from Tatham's collection. Mockito: Trying to spy on method is calling the original method. If you have written unit tests using Mockito's @Mock annotation then you will find that @MockBean is very similar to it. Trying to upgrade Mockito from 3.4.6 (3.4.8 wasn't published to Maven central) to anything 3.5.x (3.5.7 included) and I get some weird NPEs, which don't happen if I run each test on its own: Initially I thought it might be caused by the new MockedStatic usage, but I've marked those classes with @Disable and the exceptions happen anyway and the test classes that are affected weren't using MockedStatic anyway, so I'm not exactly sure how to investigate this further. In this tutorial, we'll see common errors that lead to a NullPointerException on an Autowired field. The most likely candidate for the regression is probably #2004 @raphw does this exception ring any bells? Maybe would be nice solve it in same way as is e.g. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Ed Webb's answer helped in my case. It's not them. "This worked for me. Adding MockitoAnnotations.initMocks(this); worked, my tests seem to be using my mocks, how would I go about explicitly telling my service to use my mocks? Connect and share knowledge within a single location that is structured and easy to search. The use case of @MockBean is integration test cases. Your tests are making large assumptions that they have each object (non null) returned from the previous call. Ubuntu won't accept my choice of password. We'll also explain how to fix the problem. https://github.com/mockito/mockito/wiki/FAQ, Junit 5 with InjectMocks. I read the #1833 and sounds as good improvement. Verify Method called throws Null Pointer exception. Break even point for HDHP plan vs being uninsured? Making statements based on opinion; back them up with references or personal experience.
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