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mockito mock annotation null pointer exception

    mockito mock annotation null pointer exception

    Turns out I hadn't included the maven-surefire-plugin in my pom.xml and that meant the @ExtendWith wasn't actually doing anything! Then shouldn't this answer be marked as correct? The object is null though, so the unboxing fails accessing a null pointer. Yes I did, But getting same error Null Pointer Exception. recording its expected behavior, including the action, result, exceptions, etc. https://github.com/mockito/mockito/wiki/FAQ, Junit 5 with InjectMocks. 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. For example, the "org.easymock" package also does have an annotation called @Mock, which of course, won't work with Mockito specific setup. 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. Otherwise thanx for your input. try{ I finally reached the issue. Annotate the test class with: @ExtendWith(MockitoExtension.class). Thanks for the help and suggestions! Window window; Pingback: Null pointer exception when stubbing Ask Android Questions, Followed ur steps well bt still facing the null pointer exceptions . And it is the 3.5.0 version that made the break for me. (Ep. I don't know what's wrong, but it says that, One of them is enough for use @mock annotation, Thank you for answering! So I started writing tests for our Java-Spring-project. If not share your stack trace as well as the code you are running. You signed in with another tab or window. What is a NullPointerException, and how do I fix it? It's not them. In my case (not the case for this question), I was trying to mock a dependency for another Mock for the UUT (i.e. I see that when the, When AI meets IP: Can artists sue AI imitators? Then as if by magic, it started working for me. * is unsupported, as Mockito itself is based on these classes. What does 'They're at four. DiscountCalculator mockDiscountCalculator = Mockito.mock(DiscountCalculator.class); #2) Mock creation with Annotations. 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. 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. In your example, make sure that you have: Once I did that, the NullPointerExceptions disappeared. Of course I don't know your full implementation. Product pr = new Product(); This also applies to method calls within when (.). So, first we should mock a parameter, for instance. When it run with other test all following test failed on this NPE. The default return value of methods you haven't stubbed yet is false for boolean methods, an empty collection or map for methods returning collections or maps and null otherwise. So what I want to do is, to set: But no matter which when-clause I do, I always get a NullpointerException, which of course makes sense, because input is null. Therefore, I would be inclined to close this issue as WontFix, unless @nguyenquoc you are mocking a non-java.lang. and here are the errors https://travis-ci.org/openmrs/openmrs-module-sync2/builds/602230608?utm_source=github_status&utm_medium=notification I have a class named Pinger Service which calls a HttpAdapter opening up HttpURLConnection and returning it, where getResponseCode is then called to find out if the URL was 200 or not. rev2023.5.1.43405. Connect and share knowledge within a single location that is structured and easy to search. You run you test using SpringJUnit4ClassRunner and as far as I know, @Mock doesn't work unless you use MockitoJunitRunner or MockitoAnnotations.initMocks(this);. How should I deal with this protrusion in future drywall ceiling? @InjectMocks { After removing that line from build.gradle things were started working. I had the same problem and my issue was simply that I had not annotated the class properly using @RunWith. It seems that creating a mock of a particular class/interface in a lot of tests from independent test classes exposes this problem. Mockito : how to verify method was called on an object created within a method? rev2023.5.1.43405. 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 In my case i forgot to initialize my variables effectively THANK YOU !! I've replicated the same conditions in a unit test with robolectric and that problem doesn't exist. Mockito.when(httpAdapter.createHttpURLConnection("devnews.today")).thenReturn(mockHttpURLConnection); Website website = pingerService.ping("http://devnews.today"); Hence at runtime HttpUrlConnection is actually null wthe default return value for mocks, Instead of @Autowire on PingerService use @InjectMocks, Then, (since you are using SpringJUnit4ClassRunner.class) add a method annotated with @Before. Since you didn't stub the updateUser function it returned null and the NPE is thrown. " @Test(expected = SyncException.class) @willa I have made these changes to the test but wondering if this truely tests what the method doeshttps://github.com/openmrs/openmrs-module-sync2/pull/149, https://github.com/openmrs/openmrs-module-sync2/pull/149. 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. There are not so much diff : v3.4.6v3.5.0, but for me simple (humble, grateful ;-)) user, it is Klingon ! When using JUnit 5 or above. 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. In most of the test classes @RunWith(MockitoJUnitRunner.class) works fine in injecting mocks. String productId = pr455; Well in my case it was because of wrong annotation usage. How to force Unity Editor/TestRunner to run at full speed when in background? For me adding the annotation to the class: and modifying the version of Mockito solved this issue. For example, to mock a function that takes a primitive long as parameter, instead of using any(), you should be more specific and replace that with any(Long.class) or Mockito.anyLong(). Thanks, initMocks is deprecated, use MockitoAnnotations.openMocks instead. Please review the below code: updateUser() method verification throws Null Pointer Exception. every thing is fine just getting NullpointerException. IMHO you need to add a @RunWith(some.mockito.TestSuiteIDontRememberName.class) annotated to the test class. From first glance, I think your problem is with the Spring application context. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Connect and share knowledge within a single location that is structured and easy to search. Problem with wiki is that you read it probably when you start with Mockito as newer. Parabolic, suborbital and ballistic trajectories all follow elliptic paths. (Ep. 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. JUnit and Mockito Null Pointer Exception [duplicate], When AI meets IP: Can artists sue AI imitators? // Null pointer exception saying bar is null. 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. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. @andrei-ivanov How did you go about this in the end? Sign up for a free GitHub account to open an issue and contact its maintainers and the community. Mockito: Trying to spy on method is calling the original method. For some reason, my IDE was importing org.testng.annotations.Test by default. This also applies to method calls within when(). Your code probably calls hideProgressDialog() twice. This can help to break it down to see which class would cause this. @Test 3. In my case, Intellij created Test with org.junit.jupiter.api.Test (Junit5) instead of import org.junit.Test of (Junit4) which caused all beans to be null apparently. You need to annotate the mocking object with the. The default return value of methods you haven't stubbed yet is false for boolean methods, an empty collection or map for methods returning collections or maps and null otherwise. Find centralized, trusted content and collaborate around the technologies you use most. To learn more, see our tips on writing great answers. When this class that contains this mocking is run alone that the test is green in Eclipse and maven too. I'm the next poor soul lol. The @Mock annotation requires a test suite that searches for the annotation and gathers the information to inject the values there. This only happens in Android Espresso tests. 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. You have three options for activating the @Mock annotation: MockitoRule, MockitoJUnitRunner, MockitoAnnotations.initMocks(this). Read more >. Sign in For Kotlin : @RunWith(MockitoJUnitRunner::class). What can we do to help you to solve this issue ? Today, I shared 3 different ways to initialize mock objects in JUnit 5, using Mockito Extension ( MockitoExtension ), Mockito Annotations ( MockitoAnnotation#initMocks ), and the traditional Mockito#mock . One option is create mocks for all intermediate return values and stub them before use. Well occasionally send you account related emails. Removing the mocking of the java.lang.reflect.Method made everything green again. As we solved it by rewrite unfinished feature. Example Error: Thanks !!! I followed what @hoaz suggested. Why is printing "B" dramatically slower than printing "#"? And so the dependencies inside the MyClass remained null causing a null reference exception to be thrown once used. Find centralized, trusted content and collaborate around the technologies you use most. If you are sure by your mocking skills, the issue will be probably somewhere else. Folder's list view has different sized fonts in different folders. Undesired invocation: Working with EasyMock's mocks involves four steps: creating a mock of the target class. 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. Debug and check if you are returning something. Here is a working example of DocumentRepositoryTest class for reference: DocumentRepositoryTest class is mocking documentRepository object. Exception as an Object. IMHO using the MockitoRule is the best one, because it lets you still choose another runner like e.g. https://github.com/openmrs/openmrs-module-sync2/commit/3dec2022a0d5058c45fce3f9abdc106ce0b8c833. Mockito test a void method throws an exception. Please, read the page How to create a Minimal, Reproducible Example and edit your question to include testable code, showing that NPE, so we can, at least, see how and where it is occuring. Still, I you want to keep the compatibility you should include the junit-vintage-engine artifact in your test runtime path. 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. I'm learning and will appreciate any help, A boy can regenerate, so demons eat him for years. doCallRealMethod().when(parentFeedReader).pullAndProcessAllFeeds(); Parameterized. In the Maven/Gradle build tool, if you set to use testRuntimeOnly 'junit5',then it might not take @RunWith since it is not available and it is replaced with @ExtendWith in Junit5. Maybe you did it accidentally. Can anybody tell me what am I doing wrong? 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. @pyus13 This should be a new question with more code. What does 'They're at four. pr.setName(buhbdf); How do the interferometers on the drag-free satellite LISA receive power without altering their geodesic trajectory? Is it safe to publish research papers in cooperation with Russian academics? It's not that Mockito guys didn't do a good job, this behavior is documented . { * interface that creates problems? Thanks hope this will save someone's time. 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? Is it a basically misunderstanding from my side, or is there something else wrong? Already on GitHub? Thank you so much you saved me. 2. I get an NPE when I run the exact code on my IDE. +1 for the "make sure your are using JUnit for all annotations"! 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. I'd need more detail to to look into it. The issue was that the activity that I was testing extended AppCompatActivity instead of Activity. So given case class ValueClass(value: Int) extends AnyVal, what you want to do is ValueClass(anyInt) instead of any[ValueClass]. Core Concepts. Did the drapes in old theatres actually say "ASBESTOS" on them? For me, it was because I was stubbing the mock in the @BeforeAll method. Find centralized, trusted content and collaborate around the technologies you use most. I'll add that note. Here is a list of 3 things you should check out. Can you show all the declaration of the class. Parameterized.. Use the MockitoRule public class MockitoTest { @Mock private IRoutingObjHttpClient routingClientMock; @Rule public MockitoRule rule = MockitoJUnit . It was working before but I understand that it is not a good practise. I am running through the same problem again. Is "I didn't think it was serious" usually a good defence against "duty to rescue"? How do the interferometers on the drag-free satellite LISA receive power without altering their geodesic trajectory? Content Discovery initiative April 13 update: Related questions using a Review our technical responses for the 2023 Developer Survey. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. And what I knew was the code enters to throwable after getting Null Pointer Exception on getUnsuccessfulCallData(false, syncMessage) and the test fails Saying . Which language's style guidelines should be used when writing code that is supposed to be called from another language? The all-open compiler plugin adapts Kotlin to the requirements of those frameworks and makes classes annotated with a specific annotation and their members open without the explicit open keyword. Identify blue/translucent jelly-like animal on beach. Making statements based on opinion; back them up with references or personal experience. The above will produce the same exact issue as OP. Do I need to mock the request that I have done inside getUnsuccessfulCallData(showDialog: Boolean, syncMessage: String ) to verify the method? 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). We can use @Mock to create and inject mocked instances without having to call Mockito.mock manually. It can also be an import problem, so make sure you have the appropriate imported package. Is there any explaination for this issue ? For JUnit5 check, you are using proper imports also. (Ep. The test example did not so I had to sort of fake it. StockService stockService; 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. Break even point for HDHP plan vs being uninsured? I also notice that DAO was null so I did this(Just to mention, I did the below step to try, I know the difference between springUnit and Mockito or xyz): How do I mock external method call with Mockito. We are using in our project mockito long time. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Jun 6, 2014 at 1:13. What are the arguments for/against anonymous authorship of the Gospels, Copy the n-largest files from a certain directory to the current one. two layers of mocks). 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. Mockito.when(parentFeedReader.enabled()).thenReturn(false); Thank you very much! How to subdivide triangles into four triangles with Geometry Nodes? verify(presenter, times(1)).getUnsuccessfulCallData(eq(false), eq("Call synced successfully. Could a subterranean river or aquifer generate enough continuous momentum to power a waterwheel for the purpose of producing electricity? I was getting errors that made no sense but using Mockito.anyInt() rather than Mockito.any() solved it. Not the answer you're looking for? In you're example when (myService.getListWithData (inputData).get ()) will cause a NullPointerException because . But for sure, NullPointerException happened because you want something which is not there. The text was updated successfully, but these errors were encountered: verify(view).hideProgressDialog()implicitly means the same as verify(view, times(1)).hideProgressDialog(). Most of the people just forget to specify the test runner, running class for mocking. 3. But why do I get Null Pointer Exception here ? Asking for help, clarification, or responding to other answers. devnews.today != http://devnews.today. So instead of when-thenReturn , you might type just when-then. Yes, indeed, now I found one mock of the Method which indeed the culprit. My NPE was happening as I did not explicitly set the class under tests' dependencies to be the classes I had mocked. Updated the example, even with this set, it is still returning null. getUnsuccessfulCallData(false, syncMessage) throws Null Pointer Exception which is inside subscribe of fun syncLocalOrders(syncOrders: SyncOrders). 3. Why refined oil is cheaper than cold press oil. As for the error occuring when not mocking core classes. I'll try to do one next week, after I return from vacation, but, in the meantime, I've commented out tests one-by-one, until I discovered what triggers the problem. One of them has a Mockito.mock(Method.class). It's a simple matter of checking each object returned to see which one is null. 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. 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. Where does the version of Hamapil that is different from the Gemara come from? The use case of @MockBean is integration test cases. Can you please create another question on StackOverflow with a complete example. I tried all the suggestions that you have mentioned but couldn't solve the issue. Null pointer exception when stubbing Ask Android Questions, 7 different ways how to get NumberFormatException in Java, How to figure out if a character in a string is a number, How To Turn Number To String With Padded Space or Zeroes, How to remotely debug Java application | Codepills.com, How to build with Maven without running tests, 3 basic mistakes for NullPointerException when Mock, How to trigger action with Scheduler and Quartz in Camel | Codepills.com, How to download a file from Azure Claud Storage. Can Mockito capture arguments of a method called multiple times? So to fix an error/bug in a test, you have to change production code? Try to to check if the method that you are calling is a final method or not. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. So the class under test was unable to find its required dependencies, creating the NPE. Mockito : how to verify method was called on an object created within a method? Required fields are marked *. Foo foo = Mockito.mock(Foo.class); when(foo.print()).thenReturn("value");. As per Mockito you can create mock object by either using @Mock or Mockito.mock(Context.class); , I got NullpointerException because of using @RunWith(PowerMockRunner.class), instead of that I changed to @RunWith(MockitoJUnitRunner.class) it works fine. What if we must allow NullPointerException in Some Places. { mockContext = Mockito.mock(Context.class); }, In our example, it is the testClass instance annotated with @InjectMocks.This line will search for any mocked dependencies for testClass instance & inject them properly. Use one or the other, in this case since you are using annotations, the former would suffice. Why don't we use the 7805 for car phone chargers? Apr 25, 2016 at 18:45. What's the most energy-efficient way to run a boiler? 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. First you dont need both @RunWith(MockitoJUnitRunner.class) and MockitoAnnotations.initMocks(this); at the same time. You need to annotate the mocking object with the @Mock annotation. There are two solutions: Use deep stubbing: ValueProducerFactory valueProducerFactory = Mockito.mock(ValueProducerFactory.class, Mockito.RETURNS_DEEP . I've managed to make a reproducer You might as well consider using compiler's "all-open" plugin: Kotlin has classes and their members final by default, which makes it inconvenient to use frameworks and libraries such as Spring AOP that require classes to be open. i declared MockMvc object also bt didnt mension here, when debugging in StockController i am getting null pointer Exception in -> if (optional.isPresent()). view.hideProgressDialog(); @willa https://travis-ci.org/openmrs/openmrs-module-sync2/builds/604393280?utm_source=github_status&utm_medium=notification. But I mocked the consumer, why is it throwing null pointer exception and I should be skipping over that method, right? @Service public class Service { @Autowired private Consumer<String, String> kafkaConsumer; public void clearSubscribtions () { kafkaConsumer.unsubscribe None of these answers worked for me. What is this brick with a round back and a stud on the side used for? * now. But in few test classes both @RunWith(MockitoJUnitRunner.class) and MockitoAnnotations.initMocks(this) worked together only. In order to test private methods, you will need to refactor the code to change the access to protected (or package) and you will have to avoid static/final methods. Have a question about this project? In my case I was trying to mock a property which was annotated with @JvmField. Did you try to remove mocks until the issue no longer occurs? To learn more, see our tips on writing great answers. How do I set a property on a mocked object using Mockito? Content Discovery initiative April 13 update: Related questions using a Review our technical responses for the 2023 Developer Survey. THANK YOU!!!! @InjectMocks annotation on the service? StockController stockController; } Where does the version of Hamapil that is different from the Gemara come from?

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