mockito mock annotation null pointer exception

By clicking Sign up for GitHub, you agree to our terms of service and Why did DOS-based Windows require HIMEM.SYS to boot? view.hideProgressDialog(); Can corresponding author withdraw a paper after it has accepted without permission/acceptance of first author. Window window; Pingback: Null pointer exception when stubbing Ask Android Questions, Followed ur steps well bt still facing the null pointer exceptions . Am just thinking , do you have atom feeds started ? Did you try to remove mocks until the issue no longer occurs? Did the drapes in old theatres actually say "ASBESTOS" on them? Changed it to @Before and it works like charm. Mockito : how to verify method was called on an object created within a method? Working with EasyMock's mocks involves four steps: creating a mock of the target class. So I had: I have no idea why that produced a NullPointerException. I will be happy to look at the stack trace if you share it. Can anybody tell me what am I doing wrong? Thank you for your help to point the real error. Specify Mockito running class. rev2023.5.1.43405. You have three options for activating the @Mock annotation: MockitoRule, MockitoJUnitRunner, MockitoAnnotations.initMocks(this). Removing the mocking of the java.lang.reflect.Method made everything green again. Does the order of validations and MAC with clear text matter? What is this brick with a round back and a stud on the side used for? Required fields are marked *. I am using JUnit version 4 and i still needed "@RunWith(MockitoJUnitRunner.class)" annotation for "when" method to work properly. 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. And so the dependencies inside the MyClass remained null causing a null reference exception to be thrown once used. I have added the stacktrace below: ` org.mockito.exceptions.verification.TooManyActualInvocations: To fix this, I was able to just replace AppCompatActivity with Activity since I didn't really need it. You are running a Mock test with @RunWith(MockitoJunitRunner.class). That's means I also used the feature to mock final object mock-maker-inline. Debug and check if you are returning something. 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. Most of the people just forget to specify the test runner, running class for mocking. In my case it was due to wrong import of the @Test annotation, Make sure you are using the following import. For JUnit 5 the test class has to be annotated with: you need to initialize MockitoAnnotations.initMocks(this) method has to called to initialize annotated fields. 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. Have a question about this project? Well occasionally send you account related emails. How to verify that a specific method was not called using Mockito? You signed in with another tab or window. So instead of when-thenReturn , you might type just when-then. Change getUnsuccessfulCallData(showDialog: Boolean, syncMessage: String) to open instead of internal or enable mock-maker-inline (if you haven't already). Thankyou Rammgarot. So given case class ValueClass(value: Int) extends AnyVal, what you want to do is ValueClass(anyInt) instead of any[ValueClass]. 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(). It can cover both Constructor injected & Field injected dependencies. 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? @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. rev2023.5.1.43405. 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. Add @ExtendWith(MockitoExtension.class) annotation to the test class and it should work given You are using Junit 5+ version. @willa https://travis-ci.org/openmrs/openmrs-module-sync2/builds/604393280?utm_source=github_status&utm_medium=notification. The issue was that the activity that I was testing extended AppCompatActivity instead of Activity. I needed to tell the spring boot test where to look for the beans required for the example. Verify method called throws Null Pointer Exception @David I think your problem should be a new question with a complete example. To configure the exception itself, we can pass the exception's class as in our previous examples or as an object: 5. 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. @Mock Annotation. anyInt() provides a native integer, so it works. Don't forget to annotate your Testing class with @RunWith (MockitoJUnitRunner.class). 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. 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. It's a simple matter of checking each object returned to see which one is null. I was getting errors that made no sense but using Mockito.anyInt() rather than Mockito.any() solved it. 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. The above will produce the same exact issue as OP. I hope this helps. And the stack trace tells you precisely where it is occurring: Take a look at the test class in this example, I don't think you should be using Autowired annotation in a test class. If not share your stack trace as well as the code you are running. verify(presenter, times(1)).getUnsuccessfulCallData(eq(false), eq("Call synced successfully. Where might I find a copy of the 1983 RPG "Other Suns"? Maybe would be nice solve it in same way as is e.g. https://github.com/openmrs/openmrs-module-sync2/commit/3dec2022a0d5058c45fce3f9abdc106ce0b8c833. use new keyword), to ensure im getting my native class behaviour for testing. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. What if we must allow NullPointerException in Some Places. You have to inject the class annotated with @Mock Identify blue/translucent jelly-like animal on beach. 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 could confirm that have this issue too. How do I set a property on a mocked object using Mockito? For Mockito, there is no direct support to mock private and static methods. You signed in with another tab or window. We are using in our project mockito long time. Not the answer you're looking for? To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Well occasionally send you account related emails. I was using junit 4 for testing and used @BeforeEach instead of @Before while initializing. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Content Discovery initiative April 13 update: Related questions using a Review our technical responses for the 2023 Developer Survey. for String class so some error message that point to this. It, 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. toString() results in a null pointer exception, and using the mock also results in a null pointer exception. Did the drapes in old theatres actually say "ASBESTOS" on them? Turns out I hadn't included the maven-surefire-plugin in my pom.xml and that meant the @ExtendWith wasn't actually doing anything! You might get NullPointerException exception when you try to mock object in your tests. You signed in with another tab or window. This can help to break it down to see which class would cause this. Thanks for the help and suggestions! When generating a mock, we can simulate the target object, specify its behavior, and finally verify whether it's used as expected. However I'm trying to mock a net.sf.ehcacheCache object. JUnit and Mockito Null Pointer Exception [duplicate], When AI meets IP: Can artists sue AI imitators? When using JUnit 5 or above. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Example Error: Thanks !!! Is it safe to publish research papers in cooperation with Russian academics? I don't think that's the correct approach. If I were you, I'd first try to initialize the mocked instances in a @Before method and see if the test runs then, I'd read the Mockito (sorry, but I normally use EasyMock) library documentation, and check how is the @Mock annotation used (I can tell you you have chances for this to be the problem). 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. My tests work with Mockito 3.3.3, but fail with 3.6.0. @pyus13 This should be a new question with more code. In 5e D&D and Grim Hollow, how does the Specter transformation affect a human PC in regards to the 'undead' characteristics and spells? recording its expected behavior, including the action, result, exceptions, etc. rev2023.5.1.43405. Worked example; To subscribe to this RSS feed, copy and paste this URL into your RSS reader. -> at com.rosia.today.TodayPagePresenter$syncLocalOrders$2.accept(TodayPagePresenter.kt:75), As I have already mentioned on previous conversation, after debugging the code, I came to know that verifying call of function Has anyone faced the same issue? 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. But was 2 times. For me, even after adding @RunWith(MockitoJUnitRunner.class) it was not working. In my case, my Mockito annotation didn't match the JUnit Version. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Since you didn't stub the updateUser function it returned null and the NPE is thrown. Do this for all the mocks you are creating. 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? We can also configure Spy to throw an exception the same way we did with the mock: 6. Learn how your comment data is processed. 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 When calculating CR, what is the damage per turn for a monster with multiple attacks? Mockito class javadoc where is enumeration of features. 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). (adsbygoogle = window.adsbygoogle || []).push({}); Your email address will not be published. Original implementation is changed in the meantime and we don't mock java.lang.reflect. Is there such a thing as "right to be heard" by the authorities? catch(Exception e) Why is printing "B" dramatically slower than printing "#"? our application uses JUNIT5 , same issue occured. This is clearly related to Mockito and my spring beans not being injected correctly. The issue I have is that the code stops working when I static-mock more than one method in my code. In this article, we explored how to configure method calls to throw an exception in Mockito. The @Mock annotation requires a test suite that searches for the annotation and gathers the information to inject the values there. Two MacBook Pro with same model number (A1286) but different year, "Signpost" puzzle from Tatham's collection. By clicking Sign up for GitHub, you agree to our terms of service and But in few test classes both @RunWith(MockitoJUnitRunner.class) and MockitoAnnotations.initMocks(this) worked together only. The object is null though, so the unboxing fails accessing a null pointer. I creat. 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. Spy. In my case, it was the wrong import for when(). We can use @Mock to create and inject mocked instances without having to call Mockito.mock manually. test.zip. Alright thought the class youre mocking had dependencies on the former. @andrei-ivanov 's workaround works, but is quite slow. @andrei-ivanov How did you go about this in the end? Corner case: Mockito: Trying to spy on method is calling the original method. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. @bohsen still getting the same issue when doReturn/when is used, updated the description with the different cases, This passes in my IDE. with stubbing behaviour of the MyService mock instance: When you do this, the MyRepository test suite mock instance can be removed, as it is not required anymore. This doesnt answer the OP's original query, but its here to try help others with Mockito null pointer exceptions (NPE). one or more moons orbitting around a double planet system. Content Discovery initiative April 13 update: Related questions using a Review our technical responses for the 2023 Developer Survey. 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. Content Discovery initiative April 13 update: Related questions using a Review our technical responses for the 2023 Developer Survey, Mock and InjectMocks return NullPointerException, Spring @Autowired field is null when running Mockito test. Can Mockito capture arguments of a method called multiple times? In your example, make sure that you have: Once I did that, the NullPointerExceptions disappeared. If you are sure by your mocking skills, the issue will be probably somewhere else. 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. Hope it helped. 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. 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. The test keeps failing with 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. What's the most energy-efficient way to run a boiler? IMHO you need to add a @RunWith(some.mockito.TestSuiteIDontRememberName.class) annotated to the test class. Please create a small reproduction case, e.g. } Conclusion. This other SO question is more specifically about that, but you'd miss it when you don't know the issue is with value classes. after all the above failed this import was the one which worked. 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. Can you please create another question on StackOverflow with a complete example. Also note, I just created a dummy Consumer class cause I did not have the actual class in my environment, Is there a way to run this with SpringJUnit4ClassRunner.class. 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. You need to instantiate the routingClientMock e.g. In the following example, we'll create a mocked ArrayList manually without using the @Mock annotation: @Test public void whenNotUseMockAnnotation_thenCorrect() { List . 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). Find centralized, trusted content and collaborate around the technologies you use most. 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). The use case of @MockBean is integration test cases. mvn install on a whole product), then the mock is created, but is defective, e.g. Any pointers on what i should do? Asking for help, clarification, or responding to other answers. This annotation is a shorthand for the Mockito.mock() method. Leaving this comment for the next poor soul." One option is create mocks for all intermediate return values and stub them before use. Find centralized, trusted content and collaborate around the technologies you use most. Of course I don't know your full implementation. Parameterized. In my case (not the case for this question), I was trying to mock a dependency for another Mock for the UUT (i.e. Im still using Junit 4 for reasons outside my control. Spring testing support with override the real bean with the mock created using Mockito. For me, it was because I was stubbing the mock in the @BeforeAll method. In Groovy, you have meta-object protocol or MOP that allows you to use meta-programming techniques. We don't need mock this class now. That's why you get a NPE, because mockHttpURLConnection is null in your test method. And the stack trace tells you precisely where it is occurring: PingerServiceTests.java:44. When I pass from mockito(-jupiter) 3.4.6 to 3.5.0 everything goes wrong. Thanks for contributing an answer to Stack Overflow! Mockito cannot mock the final method. I know I should not be testing void methods like this, but I am just testing Mockito.doNothing() as of now with a simple example. Needed to change the variable-names, since it's from my company ;). Find centralized, trusted content and collaborate around the technologies you use most. 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. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Content Discovery initiative April 13 update: Related questions using a Review our technical responses for the 2023 Developer Survey. Core Concepts. Is "I didn't think it was serious" usually a good defence against "duty to rescue"? 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). -> at com.rosia.today.TodayPagePresenterTest.syncLocalOrders_OrderNotEmptySuccessTest(TodayPagePresenterTest.kt:67) Wanted 1 time: Yes I did, But getting same error Null Pointer Exception. 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 to fix an error/bug in a test, you have to change production code?

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