mockito mock annotation null pointer exception

The source code of the examples above are available on GitHub mincong-h/java-examples . Required fields are marked *. To learn more, see our tips on writing great answers. I finally reached the issue. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. This annotation is a shorthand for the Mockito.mock() method. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, Why are you mocking something that you're autowiring? Yes @InjectMocks is for exactly the same purpose to use all the Mock objects. How do the interferometers on the drag-free satellite LISA receive power without altering their geodesic trajectory? You signed in with another tab or window. 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. This only happens in Android Espresso tests. What is this brick with a round back and a stud on the side used for? Not the answer you're looking for? None of these answers worked for me. 5. 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? Most spring boot applications have a class @SpringBootApplication annotation somewhere that will be found when the test is launched. Read more >. in an @BeforeEach setup. 3. The reason why is that any() returns a generic object reference. 4. mvn install on a whole product), then the mock is created, but is defective, e.g. For example, the "org.easymock" package also does have an annotation called @Mock, which of course, won't work with Mockito specific setup. in testing class it mocked object is mocking perfectly but when it goes to corresponding class that mocked reference is becoming null. For JUnit5 check, you are using proper imports also. Mockito.doNothing () keeps returning null pointer exception. privacy statement. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Can corresponding author withdraw a paper after it has accepted without permission/acceptance of first author, Folder's list view has different sized fonts in different folders, Extracting arguments from a list of function calls. Also we should mock prefs. Exception as an Object. rev2023.5.1.43405. I just want to make sure, that if any class calls this method, then no matter what, just return true or the list above. 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. In short in semi-pseudocode it should look like the following; @willa I finally figured out a way by mocking the class plus mocking the some methods and then calling the real method. @David I think your problem should be a new question with a complete example. 3. In Groovy, you have meta-object protocol or MOP that allows you to use meta-programming techniques. Making statements based on opinion; back them up with references or personal experience. 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. Connect and share knowledge within a single location that is structured and easy to search. All the above commented codes are not required What does 'They're at four. The @Mock annotation requires a test suite that searches for the annotation and gathers the information to inject the values there. But I mocked the consumer, why is it throwing null pointer exception and I should be skipping over that method, right? Appreciate the response, I think the problem was I was using it in JUnit Test and while some code merges someone from team mistakenly added dex maker testImplementation dependencies. Optional optional = stockService.getProduct(productId); Sorted by: 1. Where might I find a copy of the 1983 RPG "Other Suns"? 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. Hi everyone, I have exactly this issue for existing tests migrating to any mockito from 3.5.0 to the current latest 3.10.0 If you don't control the source you're mocking, you can get around it using, Mockito - NullpointerException when stubbing Method, stackoverflow.com/help/minimal-reproducible-example, static.javadoc.io/org.mockito/mockito-core/2.20.0/org/mockito/, github.com/mockito/mockito/blob/v2.20.0/src/main/java/org/, When AI meets IP: Can artists sue AI imitators? So to fix an error/bug in a test, you have to change production code? Undesired invocation: Thanks hope this will save someone's time. What is Wario dropping at the end of Super Mario Land 2 and why? I was trying to mock a "final" method, which apparently was the problem. However I'm trying to mock a net.sf.ehcacheCache object. If you are sure by your mocking skills, the issue will be probably somewhere else. In you're example when(myService.getListWithData(inputData).get()) will cause a NullPointerException because myService.getListWithData(inputData) is null - it has not been stubbed before. Did you manage to resolve this? edited 17 Oct, 2020. . Thank you so much you saved me. What if we must allow NullPointerException in Some Places. Well occasionally send you account related emails. Already on GitHub? Add a text file to the project's src/test/resources/mockito-extensions directory named org.mockito.plugins.MockMaker and add a single line of text: After that, mocking the final method should work just fine. Canadian of Polish descent travel to Poland with Canadian passport, xcolor: How to get the complementary color, Ubuntu won't accept my choice of password, Two MacBook Pro with same model number (A1286) but different year, User without create permission can create a custom object from Managed package using Custom Rest API. I found that by switching to using the correct variant from mockito gets rid of the errors. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. By calling Mockito.spy (YourClass.class) it will create a mock which by default uses the real . Criteria Query Mockito unit test - NullPointerException. Sign in Stubbing Method will therefore lead to undefined behavior. IMHO using the MockitoRule is the best one, because it lets you still choose another runner like e.g. Content Discovery initiative April 13 update: Related questions using a Review our technical responses for the 2023 Developer Survey. I used import static reactor.core.publisher.Mono.when by accident. private variable 'status' which is null. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Content Discovery initiative April 13 update: Related questions using a Review our technical responses for the 2023 Developer Survey, Spring Controller Testing using Mockito , Null Pointer Exception, Mockito Test With java.lang.NullPointerException. I have left comments on your draft PR. Why refined oil is cheaper than cold press oil. Most likely, you mistyped returning function. Take a look at the following code snippet. I read the #1833 and sounds as good improvement. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Annotate the test class with: @ExtendWith(MockitoExtension.class). @pyus13 This should be a new question with more code. Can you show all the declaration of the class. Thanks for contributing an answer to Stack Overflow! By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. if you use @Mock Annotation to Context mockContext; But it will work if you use @RunWith(MockitoJUnitRunner.class) only. Especially when for String you got error but for java.lang.reflect. Asking for help, clarification, or responding to other answers. Already on GitHub? is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. Not sure how, since each test ran separatelly is fine and I can't tell which one, when all the suite is ran, creates some sort of corruption, since the @Origin Method invokedMethod is injected as some broken object. I had the problem that I declared @Mock MyClass myClass and then tried to mock a behaviour inside my @BeforeAll annotated method: Apparently init() was executed before the mock initialization of myClass, so myClass == null inside init(). Also ran into this issue when upgrading from Mockito 3.3.3 to Mockito 3.6.0 (from spring-boot 2.3.6 to 2.4.0). It's not them. What is a NullPointerException, and how do I fix it? So, first we should mock a parameter, for instance. When generating a mock, we can simulate the target object, specify its behavior, and finally verify whether it's used as expected. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Of course I don't know your full implementation. 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. For some reason, my IDE was importing org.testng.annotations.Test by default. Where might I find a copy of the 1983 RPG "Other Suns"? This doesnt answer the OP's original query, but its here to try help others with Mockito null pointer exceptions (NPE). 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. 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. In my case (not the case for this question), I was trying to mock a dependency for another Mock for the UUT (i.e. The issue I have is that the code stops working when I static-mock more than one method in my code. My tests work with Mockito 3.3.3, but fail with 3.6.0. anyInt() provides a native integer, so it works. Connect and share knowledge within a single location that is structured and easy to search. And most likely very trivial. 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. call, which is null because you haven't mocked it yet. I think that the problem is there. What is this brick with a round back and a stud on the side used for? use new keyword), to ensure im getting my native class behaviour for testing. And what I knew was the code enters to throwable after getting Null Pointer Exception on getUnsuccessfulCallData(false, syncMessage) and the test fails Saying something like view.hideProgressDialog() wanted 1 time but was 2 times. Still, I you want to keep the compatibility you should include the junit-vintage-engine artifact in your test runtime path. Find centralized, trusted content and collaborate around the technologies you use most. Can corresponding author withdraw a paper after it has accepted without permission/acceptance of first author. -> at com.rosia.today.TodayPagePresenterTest.syncLocalOrders_OrderNotEmptySuccessTest(TodayPagePresenterTest.kt:67) After making function open tests started to pass. You should use @InjectMocks instead. 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. @bohsen still getting the same issue when doReturn/when is used, updated the description with the different cases, This passes in my IDE. It was working before but I understand that it is not a good practise. What I use is JUnit and Mockito. Mockito cannot mock the final method. I was getting errors that made no sense but using Mockito.anyInt() rather than Mockito.any() solved it. Which reverse polarity protection is better and why? @Mock You run you test using SpringJUnit4ClassRunner and as far as I know, @Mock doesn't work unless you use MockitoJunitRunner or MockitoAnnotations.initMocks(this);. Can you do a draft pull request and we take a look? Conclusion. test.zip. @willa tried what you suggested but still have the NPE. recording its expected behavior, including the action, result, exceptions, etc. { mockContext = Mockito.mock(Context.class); }, Yes, indeed, now I found one mock of the Method which indeed the culprit. (Ep. to your account. Making statements based on opinion; back them up with references or personal experience. (Ep. In most of the test classes @RunWith(MockitoJUnitRunner.class) works fine in injecting mocks. What solved this issue for me (combination of answers above and my own additions): When doing command + N --> Test in Intellij it generates (as a default at least) some boilerplate that did not work in my case. In your example, make sure that you have: Once I did that, the NullPointerExceptions disappeared. You should read the Javadoc of Mockito.RETURNS_DEEP_STUBS which explains this in more detail and also has some warnings about its usage. Does a password policy with a restriction of repeated characters increase security? The text was updated successfully, but these errors were encountered: You should use doReturn/when construct instead of whenever/thenReturn. The CustomerProfileService will be initialized before the mocks are created, therefore, the repository will be null. It's said, that when I use the when()thenReturn() option I can mock services, without simulating them or so. Does anyone know why this behaviour happens when the method is not "open" ? It is stored in surefire reports directory. Why did DOS-based Windows require HIMEM.SYS to boot? Did you try to remove mocks until the issue no longer occurs? 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. For me the reason I was getting NPE is that I was using Mockito.any() when mocking primitives. The test example did not so I had to sort of fake it. This is where google took me when I had the same NullPointerException with Junit 5, but was correctly using @ExtendWith(MockitoExtension.class) in my maven project. return new GatewayResponse(HttpStatus.NO_CONTENT,product, Message.SUCCESS.getDesc()); How do you assert that a certain exception is thrown in JUnit tests? Not the answer you're looking for? ClientError: GraphQL.ExecutionError: Error trying to resolve rendered. Maybe you did it accidentally. using mocks in tests. https://github.com/openmrs/openmrs-module-sync2/commit/3dec2022a0d5058c45fce3f9abdc106ce0b8c833. Working with EasyMock's mocks involves four steps: creating a mock of the target class. Which language's style guidelines should be used when writing code that is supposed to be called from another language? The above will produce the same exact issue as OP. Interpreting non-statistically significant results: Do we have "no evidence" or "insufficient evidence" to reject the null? How to subdivide triangles into four triangles with Geometry Nodes? I could confirm that have this issue too. Not the answer you're looking for? Is "I didn't think it was serious" usually a good defence against "duty to rescue"? Mocking of classes in java.lang. Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, Just a note, I consider it very bad style to let a service return a, and are also the mock instances injected into the test clases with the, How to create a Minimal, Reproducible Example, When AI meets IP: Can artists sue AI imitators? Mocking classes that Mockito (or Byte Buddy) use internally will change the behavior of Mockito (or Byte Buddy) and lead to errors. In my case I was trying to mock a property which was annotated with @JvmField. getUnsuccessfulCallData(false, syncMessage) throws Null Pointer Exception which is inside subscribe of fun syncLocalOrders(syncOrders: SyncOrders). When I mock this class in java, I get a null pointer exception. And there's a problem in your test code you are telling the mocked instance to return null when calling method findById(), so most probably if that was to happen, you'll get a NPE in the main code, when trying to use the .orelse() method. doCallRealMethod().when(parentFeedReader).pullAndProcessAllFeeds(); 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. @Mock 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. Check your imports, based on the usage of. I tend to not mock the class under test (i.e. This doesnt answer the OP's original query, but its here to try help others with Mockito null pointer exceptions (NPE). 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 . pr.setName(buhbdf); to your account. How do I set a property on a mocked object using Mockito?
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