mockito mock annotation null pointer exception mockito mock annotation null pointer exception
How to verify that a specific method was not called using Mockito? What do hollow blue circles with a dot mean on the World Map? By clicking Sign up for GitHub, you agree to our terms of service and Is there any explaination for this issue ? However I'm trying to mock a net.sf.ehcacheCache object. Can Mockito capture arguments of a method called multiple times? Add @ExtendWith(MockitoExtension.class) annotation to the test class and it should work given You are using Junit 5+ version. rev2023.5.1.43405. It was working before but I understand that it is not a good practise. Asking for help, clarification, or responding to other answers. I don't know if it helps but in Java 15 I got this log : Sadly I don't have a lot of free cycles to investigate this issue. How do the interferometers on the drag-free satellite LISA receive power without altering their geodesic trajectory? Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. (adsbygoogle = window.adsbygoogle || []).push({}); Your email address will not be published. I am running through the same problem again. Parabolic, suborbital and ballistic trajectories all follow elliptic paths. In this article, we explored how to configure method calls to throw an exception in Mockito. "Signpost" puzzle from Tatham's collection. I was using wrong annotation/import of Mock, so my object was not getting formed. getUnsuccessfulCallData(false, syncMessage) throws Null Pointer Exception which is inside subscribe of fun syncLocalOrders(syncOrders: SyncOrders). 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. I had this issue and my problem was that I was calling my method with any() instead of anyInt(). I was struggling to understand why code works in Java but not in Kotlin. The reason why is that any() returns a generic object reference. Check that the method signature is not declared as final. When this class that contains this mocking is run alone that the test is green in Eclipse and maven too. xcolor: How to get the complementary color. Sign in I haven't used mockito on Groovy-based projects, but I have done Groovy based projects in the past with copious use of test doubles. 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. Canadian of Polish descent travel to Poland with Canadian passport. Thank you very much! Parameterized. For example, the "org.easymock" package also does have an annotation called @Mock, which of course, won't work with Mockito specific setup. 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. Have a question about this project? 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. Why is printing "B" dramatically slower than printing "#"? to your account. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. NullPointerException in java.lang.reflect.Method - Github "Signpost" puzzle from Tatham's collection. 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. FYI: I am using following versions of Gradle dependencies: Your repository instance is mocked and thus will return null for all unstubbed method calls. Yes @InjectMocks is for exactly the same purpose to use all the Mock objects. 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. DiscountCalculator mockDiscountCalculator = Mockito.mock(DiscountCalculator.class); #2) Mock creation with Annotations. To learn more, see our tips on writing great answers. Your tests are making large assumptions that they have each object (non null) returned from the previous call. Identify blue/translucent jelly-like animal on beach. Content Discovery initiative April 13 update: Related questions using a Review our technical responses for the 2023 Developer Survey. 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. This doesnt answer the OP's original query, but its here to try help others with Mockito null pointer exceptions (NPE). }, NOTE: just exclude if any syntax exceptions it might be my typing mistakes. Joshua bloch in effective java says that "Arguably, all erroneous method invocations boil down to an illegal argument or illegal state, but other exceptions are standardly used for certain kinds of illegal arguments and states. return new GatewayResponse(HttpStatus.Ok,product, Message.SUCCESS.getDesc()); @andrei-ivanov 's workaround works, but is quite slow. private variable 'status' which is null. Any pointers on what i should do? This annotation is a shorthand for the Mockito.mock() method. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. 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. 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). 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? 3. Could a subterranean river or aquifer generate enough continuous momentum to power a waterwheel for the purpose of producing electricity? When you want to use the @Mock annotation you should use the MockitoJUnitRunner. java - JUnit and Mockito Null Pointer Exception - Stack Overflow privacy statement. verify(presenter).getUnsuccessfulCallData(eq(false), anyString()). I tried all the suggestions that you have mentioned but couldn't solve the issue. Should I re-do this cinched PEX connection? https://github.com/mockito/mockito/wiki/FAQ, Junit 5 with InjectMocks. He also rips off an arm to use as a sword. It's important to note that we should only use it in a test class. Spring @Autowired Field Null - Common Causes and Solutions 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. 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. 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. I was trying to mock a "final" method, which apparently was the problem. In my case it was due to wrong import of the @Test annotation, Make sure you are using the following import. 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. rev2023.5.1.43405. But for sure, NullPointerException happened because you want something which is not there. He also rips off an arm to use as a sword. 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. You are running a Mock test with @RunWith(MockitoJunitRunner.class). NullPointerException when mocking value class with any () matcher I got null pointer bcoz of @RunWith(PowerMockRunner.class), instead of that I changed to @RunWith(MockitoJUnitRunner.class). You need to annotate the mocking object with the. Maybe it was IntelliSense. 4. Cache cache = mock (Cache.class); when (cache.get (anyObject ())).thenReturn (null); I get a null pointer exception when cache.get tries to access the. But I want to use when()..thenReturn() to get around creating this variable and so on. For me, it was because I was stubbing the mock in the @BeforeAll method. Has anyone been diagnosed with PTSD and been able to get a first class medical? By using @Mock annotation this giving a build failed. Mockito, in my opinion intentionally does not provide support for these kinds of mocks, as using these . also, make sure the class and test method is public. 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. +1 for the "make sure your are using JUnit for all annotations"! Spy. Is "I didn't think it was serious" usually a good defence against "duty to rescue"? Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. Take a look at the following code snippet. The text was updated successfully, but these errors were encountered: You should use doReturn/when construct instead of whenever/thenReturn. What does 'They're at four. In my case, it was the wrong import for when(). When you run mvn test maven will report the location of this directory. java mockito nullpointerexception unit-testing. In most of the test classes @RunWith(MockitoJUnitRunner.class) works fine in injecting mocks. 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. I replaced @Mock with @InjectMocks - then issue was resolved. BSMP. }, @RunWith(MockitoJunitRunner.class) Somehow, Intellij assumed I want to use, I somehow missed this line "MockitoAnnotations.initMocks(this); ". Is there such a thing as "right to be heard" by the authorities? Is there any known 80-bit collision attack? This worked for me. Verify method called throws Null Pointer Exception So I mean the point 39 where is about mocking final (new feature for us that allow leave Powermock in combination of static mock). 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 . JUnit and Mockito Null Pointer Exception [duplicate], When AI meets IP: Can artists sue AI imitators? If not share your stack trace as well as the code you are running. StockService stockService; Alright thought the class youre mocking had dependencies on the former. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. So we mostly read now only what is new = e.g. You have to make class and member functions open, otherwise NPE was being thrown. Which language's style guidelines should be used when writing code that is supposed to be called from another language? Does a password policy with a restriction of repeated characters increase security? while doing Mock to Window geting null instance I wasn't author of our test. Your code probably calls hideProgressDialog() twice. 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 (). Why don't we use the 7805 for car phone chargers? I creat. Most spring boot applications have a class @SpringBootApplication annotation somewhere that will be found when the test is launched. ', referring to the nuclear power plant in Ignalina, mean? 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. 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. @InjectMocks annotation on the service? You are instantiating a new service Service service = new Service(); but from what I can see you are never injecting the mock bean into the new service. 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. StockController stockController; And so the dependencies inside the MyClass remained null causing a null reference exception to be thrown once used. Hope it helped. What is the current status? Thanks, initMocks is deprecated, use MockitoAnnotations.openMocks instead. Already on GitHub? I had the same issue, but I found updating my tests (which were originally written for JUnit 3 and used the legacy setUp() and tearDown() methods) to JUnit 4 and modern annotated fixture methods worked. Use one or the other, in this case since you are using annotations, the former would suffice. Asking for help, clarification, or responding to other answers. Why the obscure but specific description of Jane Doe II in the original complaint for Westenbroek v. Kappa Kappa Gamma Fraternity? Is there a generic term for these trajectories? First, let's define a Spring component with an empty doWork method: @Component public class MyComponent { public void doWork() {} } Then, let's define our service class. public void ControllerTest() Mockito : how to verify method was called on an object created within a method? It can also be an import problem, so make sure you have the appropriate imported package. " @Test(expected = SyncException.class) It is stored in surefire reports directory. What does 'They're at four. 3 basic mistakes for NullPointerException when Mock 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.) Is "I didn't think it was serious" usually a good defence against "duty to rescue"? If a caller passes null in some parameter for which null values are prohibited, convention dictates that . Mockito : how to verify method was called on an object created within a method? Null Pointer Exception When Mocking Method With No Parameters - Github This doesnt answer the OP's original query, but its here to try help others with Mockito null pointer exceptions (NPE). 1 Answer. Find centralized, trusted content and collaborate around the technologies you use most. try{ Have you tried to go this way? when(stockService.getProduct(productId)).thenReturn(Optional.of(product)); Yes, indeed, now I found one mock of the Method which indeed the culprit. in an @BeforeEach setup. When I run the below code, I get, What can we do to help you to solve this issue ? This does not work trivially, and so the second layer mock was null. I used import static reactor.core.publisher.Mono.when by accident. THANK YOU!!!! What does 'They're at four. So given case class ValueClass(value: Int) extends AnyVal, what you want to do is ValueClass(anyInt) instead of any[ValueClass]. Thankyou Rammgarot. mockito - NullPointerException when calling a mocked method - Stack 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 . MvcResults mvcResults = mockMvc.perform(get(/product).param(id, productId)).andExpect(Status().isOk()).andReturn(); test.zip. NullPointerException when using Mockito - OpenMRS Talk The test itself, ran by itself, works but if the whole suite is ran, some tests that follow it get the problem described above. @Mock Please create a small reproduction case, e.g. { I'm also a big fan of mockito when using Java. You can, mock instance is null after @Mock annotation, https://github.com/mockito/mockito/wiki/FAQ, https://stackoverflow.com/a/55616702/2643815, When AI meets IP: Can artists sue AI imitators? This can help to break it down to see which class would cause this. 3. Therefore, I am closing this as "Infeasible". ', referring to the nuclear power plant in Ignalina, mean? Getting Started with Mockito @Mock, @Spy, @Captor and - Baeldung Conclusion. Needed to change the variable-names, since it's from my company ;). Presentation of the Problem. @InjectMocks From first glance, I think your problem is with the Spring application context. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. to your account. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. It's a simple matter of checking each object returned to see which one is null. Making a mocked method return an argument that was passed to it. 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. What if we must allow NullPointerException in Some Places. It's not them. To solve this, you can use the @InjectMocks annotation instead of = new CustomerProfileService (customerProfileRepository); Alternatively, you can manually create the spied service in the before/beforeEach . You run you test using SpringJUnit4ClassRunner and as far as I know, @Mock doesn't work unless you use MockitoJunitRunner or MockitoAnnotations.initMocks(this);. Could a subterranean river or aquifer generate enough continuous momentum to power a waterwheel for the purpose of producing electricity? First you dont need both @RunWith(MockitoJUnitRunner.class) and MockitoAnnotations.initMocks(this); at the same time. But in few test classes both @RunWith(MockitoJUnitRunner.class) and MockitoAnnotations.initMocks(this) worked together only. @tendomart I dont think it needs any class from atomfeed mocked since I am not even using it in the class that am testing. @willa https://travis-ci.org/openmrs/openmrs-module-sync2/builds/604393280?utm_source=github_status&utm_medium=notification. Creating Mocks and Spies in Mockito with Code Examples I think calling mock (YourClass.class) returns a mock which upon calling its methods throws a NPE. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. view.hideProgressDialog(); In this case you should annotate your class with: You should also import into your dependency (Maven - pom.xml): You have three options for activating the @Mock annotation: MockitoRule, MockitoJUnitRunner, MockitoAnnotations.initMocks(this).