mockito mock annotation null pointer exception

Is there such a thing as "right to be heard" by the authorities? That's means I also used the feature to mock final object mock-maker-inline. Exception as an Object. 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. test.zip. Sign in Is it a basically misunderstanding from my side, or is there something else wrong? 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. 5. Spring @Autowired Field Null - Common Causes and Solutions That's why you get a NPE, because mockHttpURLConnection is null in your test 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. Somehow, Intellij assumed I want to use, I somehow missed this line "MockitoAnnotations.initMocks(this); ". https://github.com/openmrs/openmrs-module-sync2/commit/3dec2022a0d5058c45fce3f9abdc106ce0b8c833. Does a password policy with a restriction of repeated characters increase security? Connect and share knowledge within a single location that is structured and easy to search. 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.) There are not so much diff : v3.4.6v3.5.0, but for me simple (humble, grateful ;-)) user, it is Klingon ! By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. 3. privacy statement. Annotate the test class with: @ExtendWith(MockitoExtension.class). First you don't need both @RunWith (MockitoJUnitRunner.class) and MockitoAnnotations.initMocks (this); at the same time. When it run with other test all following test failed on this NPE. I could confirm that have this issue too. If I run it with SpringJUnit4ClassRunner, I get application initialization error if I change from MockBean to Mock for Consumer because the Consumer is AUTOWIRED in the service class, I added a sample using SpringJUnit4ClassRunner in combination with SpringBoots @MockBean annotation. I've replicated the same conditions in a unit test with robolectric and that problem doesn't exist. As for the error occuring when not mocking core classes. 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. Maybe try setting a breakpoint and run the test in debugmode. Sign in Having the same problem using Junit 5 , I resolve it using : @ExtendWith(MockitoExtension.class) instead of @RunWith(MockitoJUnitRunner.class) . 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). How do you assert that a certain exception is thrown in JUnit tests? I have left comments on your draft PR. I think calling mock (YourClass.class) returns a mock which upon calling its methods throws a NPE. You are running a Mock test with @RunWith(MockitoJunitRunner.class). Thanks for the help and suggestions! 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. Mockito: Trying to spy on method is calling the original method. This does not work trivially, and so the second layer mock was null. ")), verify(presenter).getUnsuccessfulCallData(eq(false), eq("Call synced successfully.")). Is "I didn't think it was serious" usually a good defence against "duty to rescue"? Using Spring Boot @SpyBean - Shekhar Gulati using mocks in tests. You have three options for activating the @Mock annotation: MockitoRule, MockitoJUnitRunner, MockitoAnnotations.initMocks(this). 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. For Kotlin : @RunWith(MockitoJUnitRunner::class). I fallowed above rules correctly. And the stack trace tells you precisely where it is occurring: PingerServiceTests.java:44. 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. If I run the test class in a suite of tests (e.g. Parameterized. We don't need mock this class now. 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. You will have to adapt to your environment/configuration. Has anyone been diagnosed with PTSD and been able to get a first class medical? Parameterized.. Use the MockitoRule public class MockitoTest { @Mock private IRoutingObjHttpClient routingClientMock; @Rule public MockitoRule rule = MockitoJUnit . ', referring to the nuclear power plant in Ignalina, mean? 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. Change getUnsuccessfulCallData(showDialog: Boolean, syncMessage: String) to open instead of internal or enable mock-maker-inline (if you haven't already). 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 a caller passes null in some parameter for which null values are prohibited, convention dictates that . If you have written unit tests using Mockito's @Mock annotation then you will find that @MockBean is very similar to it. What is this brick with a round back and a stud on the side used for? Here is a working example of DocumentRepositoryTest class for reference: DocumentRepositoryTest class is mocking documentRepository object. Unfortunately, Method is one of the classes that Mockito relies on internally for its behavior. This also applies to method calls within when(). 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. I will be happy to look at the stack trace if you share it. 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. To learn more, see our tips on writing great answers. Most of the people just forget to specify the test runner, running class for mocking. Yes @InjectMocks is for exactly the same purpose to use all the Mock objects. In the following example, we'll create a mocked ArrayList manually without using the @Mock annotation: @Test public void whenNotUseMockAnnotation_thenCorrect() { List . How do I avoid the NullPointerException in Mockito, jUnit testing toString() results in a null pointer exception, and using the mock also results in a null pointer exception. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. Just find what was problem. Mockito : how to verify method was called on an object created within a method? 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? When using JUnit 5 or above. Should I re-do this cinched PEX connection? Already on GitHub? What does 'They're at four. Required fields are marked *. This only happens in Android Espresso tests. I came across this issue while writing unit tests for Android. Actually, you just allow null as a value for switch, so you' d now have to implement all the cases where switch is null as well, in your method. It was working before but I understand that it is not a good practise. return new GatewayResponse(HttpStatus.NO_CONTENT,product, Message.SUCCESS.getDesc()); 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). How do the interferometers on the drag-free satellite LISA receive power without altering their geodesic trajectory? xcolor: How to get the complementary color. After making function open tests started to pass. 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). To learn more, see our tips on writing great answers. Yes I did, But getting same error Null Pointer Exception. Thanks for contributing an answer to Stack Overflow! for String class so some error message that point to this. Spring testing support with override the real bean with the mock created using Mockito. Add @ExtendWith(MockitoExtension.class) annotation to the test class and it should work given You are using Junit 5+ version. I didn't check it and changed a library, sorry. We started with 1.10.19 version. To learn more, see our tips on writing great answers. When to use LinkedList over ArrayList in Java? 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. The right way to handle this would be to use an interface and mock that interface however I couldn't control the library where the "final" method was. Find centralized, trusted content and collaborate around the technologies you use most. In my case I am mocking an interface, final is not involved. It doesnt work for me always gives this error "dexcache == null (and no default could be found; consider setting the 'dexmaker.dexcache' system property)". 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. Foo foo = Mockito.mock(Foo.class); when(foo.print()).thenReturn("value");. Where might I find a copy of the 1983 RPG "Other Suns"? private variable 'status' which is null. edited 17 Oct, 2020. . Could a subterranean river or aquifer generate enough continuous momentum to power a waterwheel for the purpose of producing electricity? Is "I didn't think it was serious" usually a good defence against "duty to rescue"? The use case of @MockBean is integration test cases. Therefore, I would be inclined to close this issue as WontFix, unless @nguyenquoc you are mocking a non-java.lang. 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. Yes I have worked on a prototype to make that happen: #1833 Sadly I haven't had the time to get back to that. rev2023.5.1.43405. I tend to not mock the class under test (i.e. java - JUnit and Mockito Null Pointer Exception - Stack Overflow Already on GitHub? The CustomerProfileService will be initialized before the mocks are created, therefore, the repository will be null. Does a password policy with a restriction of repeated characters increase security? Something like Is it safe to publish research papers in cooperation with Russian academics? For Mockito, there is no direct support to mock private and static methods. Not the answer you're looking for? Presentation of the Problem. It's not that Mockito guys didn't do a good job, this behavior is documented . Mockito, in my opinion intentionally does not provide support for these kinds of mocks, as using these . DiscountCalculator mockDiscountCalculator = Mockito.mock(DiscountCalculator.class); #2) Mock creation with Annotations. 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. +1 for the "make sure your are using JUnit for all annotations"! Verify method called throws Null Pointer Exception And it is the 3.5.0 version that made the break for me. Mockito cannot mock the final method. Thankyou Rammgarot. 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. What if we must allow NullPointerException in Some Places. That's a good remark, Ridcully. I don't think that's the correct approach. privacy statement. 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. Does anyone know why this behaviour happens when the method is not "open" ? 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. { Wondering if it is the version of mockito: Ok - figured it out - it is because the method is final. You probably wanted to return the value for the mocked object. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Did you manage to resolve this? Use Mockito to mock some methods but not others, Mockito test a void method throws an exception. Learn how your comment data is processed. For me the reason I was getting NPE is that I was using Mockito.any() when mocking primitives. toString() results in a null pointer exception, and using the mock also results in a null pointer exception. Still, I you want to keep the compatibility you should include the junit-vintage-engine artifact in your test runtime path. Did you try to remove mocks until the issue no longer occurs? IMHO using the MockitoRule is the best one, because it lets you still choose another runner like e.g. 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. Mockito : how to verify method was called on an object created within a method? By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. If you want to mock an object, you need to annotate the object with @Mock annotation. So given case class ValueClass(value: Int) extends AnyVal, what you want to do is ValueClass(anyInt) instead of any[ValueClass]. So, first we should mock a parameter, for instance. In my case I was trying to mock a property which was annotated with @JvmField. The solution was to change the annotation from @BeforeAll to @BeforeEach. I get a crash when I mock a method in an interface that doesn't take any parameters. He also rips off an arm to use as a sword. Am just thinking , do you have atom feeds started ? StockController stockController; Null pointer exception when using Mockito to mock interface. Same problem can occur if you are using Junit5 since there is no more '@RunWith' annotation. rev2023.5.1.43405. Please create a small reproduction case, e.g. I was struggling to understand why code works in Java but not in Kotlin. When generating a mock, we can simulate the target object, specify its behavior, and finally verify whether it's used as expected. If the null hypothesis is never really true, is there a point to using a statistical test without a priori power analysis? Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. @ManoDestra No, how? Yes, indeed, now I found one mock of the Method which indeed the culprit. Mockito provides the capability to a mock to throw exceptions, so exception handling can be tested. "Signpost" puzzle from Tatham's collection. Thanks for contributing an answer to Stack Overflow! Conclusion. Can corresponding author withdraw a paper after it has accepted without permission/acceptance of first author. Interpreting non-statistically significant results: Do we have "no evidence" or "insufficient evidence" to reject the null? 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. What is the current status? @willa tried what you suggested but still have the NPE. public void pullAndProcessAllFeeds_shouldNotSyncIfPullIsDisabled() { Connect and share knowledge within a single location that is structured and easy to search. @BeforeEach helped me here but it always depends on execution context. 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. Optional optional = stockService.getProduct(productId); 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. when(stockService.getProduct(productId)).thenReturn(Optional.of(product)); Have a question about this project? I am running through the same problem again. When I mock this class in java, I get a null pointer exception. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. 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 . All the above commented codes are not required 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. // Null pointer exception saying bar is null. Don't forget to annotate your Testing class with @RunWith (MockitoJUnitRunner.class). The reason why is that any() returns a generic object reference. 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. Generating points along line with specifying the origin of point generation in QGIS, Folder's list view has different sized fonts in different folders. Not the answer you're looking for? What would help is to perform a bisect of Mockito versions to figure out which specific PR is causing issues. Mockito - NullpointerException when stubbing Method