Mockito : how to verify method was called on an object created within a method? To mock and assert a thrown exception in Mockito, you can use the doThrow () method and the verify () method. Mockito: Trying to spy on method is calling the original method. We also looked at two If it throws MyException during the first method call (in the preparation stage) then it should fail the test. To verify that a mock object throws an exception in Mockito, you can use the verify method and pass it a times argument to specify the number of times the method should have been called, as well as a throwable argument to specify the exception that should have been thrown. Was Galileo expecting to see so many stars? To verify that a mock object throws an exception in Mockito, you can use the verify method and pass it a times argument to specify the number of times the method should have been called, as well as a throwable argument to specify the exception that should have been thrown. Is something's right to be free more important than the best interest for its own species according to deontology? Learn to configure a method call to throw an exception in Mockito. Thank you for your contributions. The high level overview of all the articles on the site. Also, see this comment issue on JUnit of the author of ExpectedException. using mockk 1.9.3, junit 4. having a function which will report the exceptions for different conditions, need to test and verify the correct exception is reported. happen. You are trying to tell Mockito to throw an exception SomeException () that is not valid to be thrown by that particular method call. When we need to verify some other properties of the exception, we can use the ExpectedException rule. Annotate your test method with: Verify it has happened either by asserting that your test will throw such an exception: The latter option is required if your test is designed to prove intermediate code handles the exception (i.e. // Call the method and catch the exception. This work is licensed under a Creative Commons Attribution-NonCommercial- ShareAlike 4.0 International License. If the test needs to check additional things on the exception like the cause or the message (good exception messages are really important, having a precise exception type may not be enough). What does a search warrant actually look like? Get started with Spring 5 and Spring Boot 2, through the Learn Spring course: >> CHECK OUT THE COURSE Comments are closed on this article! Furthermore, it's important to note that this assertion is satisfied when the enclosed code throws an exception of type NumberFormatException or any of its derived types. And you need to test to test that it does throw exception during the second method call, not the first one. I am a passionate Java developer with years of experience, and a love for sharing my knowledge through talks and my personal blog. If you're using JUnit 4, you can annotate your test with, to assert that an exception has occured. Not the answer you're looking for? If you have a few years of experience in the Java ecosystem and you'd like to share that with the community, have a look at our Contribution Guidelines. mywebforum.com, Get Your Own How do I test a class that has private methods, fields or inner classes? Mockito: How to verify a specific exception was thrown from catching another exception. Not the answer you're looking for? The test won't fail if a subtype of the exception is thrown. Therefore testing is done with the intent of finding errors. I have noticed this question garners interest from time to time so I'll expand a little. Can I test for multiple thrown exceptions in one test method? What is important to realize is that one unit of work usually isn't just one method but at the very basic level it is one method and after that it is encapsulated by other unit of works. By adding another test ( nonExistingUserById_ShouldThrow_IllegalArgumentException ) that uses the faulty input and expects an exception you can see whether your method does what it is supposed to do with wrong input. Rename .gz files according to names in separate txt-file. Authors Top expanded (tag = admin-author-java), Partner MongoDB NPI expanded (tag = MongoDB). How to test anonymous methods with JUnit or Mockito? Ideally you should have a test method for each separate unit of work so you can always immediately view where things are going wrong. You can look at more Mockito examples from our GitHub Repository. Premium CPU-Optimized Droplets are now available. @Rule public ExpectedException expectedException = ExpectedException.none(); @Test public void throwsExcept() { var message = "test exception" expectedException.expect(NullPointerException.class); How to verify that a specific method was not called using Mockito? Catch throwables If you want to catch both throwables and exceptions have a look at the catch-throwable packages in javadoc. Working on improving health and education, reducing inequality, and spurring economic growth? jQuery Ajax error handling, show custom exception messages, Verify object attribute value with mockito. exception thrown, No exception is thrown, and assert that list of Executable's don't throw an exception. thenThrow (new MyException () ); How to verify an exception thrown in mockito? quite an advanced featu. And to "mock" an exception with mockito, use. We write a unittest that fails if no exception is raised by a function or when an exception raised by assert statement is different from expected exception. Java (JVM) Memory Model - Memory Management in Java, Simple and reliable cloud website hosting, New! Questions & Answers platform. worked for meAlso we can check the exception message as well.assertThatThrownBy(() -> myService.sumTingWong("badArg")).hasMessage("test") .isInstanceOf(IllegalArgumentException.class); this does not work if the method doSomething() return type is void? If we change the test above to expect a RuntimeException, this will also pass: The assertThrows() method enables more fine-grained control for exception assertion logic because we can use it around specific parts of the code. A sample of this could be the IllegalArgumentException which is caught with the @Test(expected = IllegalArgumentException.class) annotation. Introducing assertThrows () In JUnit 5, the above two methods of handling and verifying exceptions have been rolled into the much more straightforward and easier to use assertThrows (). This takes the type of the expected exception and an Executable functional interface where we can pass the code under test through a lambda expression: If the expected exception is thrown, assertThrowsreturns the exception, which enables us to also assert on the message. As you noticed assertEquals is still returning void, and as such doesn't allow chaining assertions like AssertJ. To learn more, see our tips on writing great answers. In the following The original answer for JUnit <= 4.12 was: Though answer has more options for JUnit <= 4.12. Mockito.reset () . Why is processing a sorted array faster than processing an unsorted array? rev2023.3.1.43269. 2023 ITCodar.com. Invoke the tested method. Testing means raising the reliability and quality of the program. This work is licensed under a Creative Commons Attribution-NonCommercial- ShareAlike 4.0 International License. It's trustworthy, readable, and maintainable. It's Mockito - Verifying Method Calls @Captor Annotation in Mockito with Example Adding behavior to mocked object in Mockito Mocking Void Methods with Mockito Mockito's mock Overloaded Methods That's all about Mocking Exception Throwing using Mockito If you have any feedback or suggestion please feel free to drop in below comment box. Mockito How to mock and assert a thrown exception? With a near-complete rewrite of JUnit 5, assertions have been improved a bit, they may prove interesting as an out of the box way to assert properly exception. on the screen and t, A readable source of bytes.Most clients will use input streams that read data What factors changed the Ukrainians' belief in the possibility of a full-scale invasion between Dec 2021 and Feb 2022? The text was updated successfully, but these errors were encountered: You can verify the type of the parameter being passed in several different ways: @Raibaz thank you for the prompt response, the help is great! Was Galileo expecting to see so many stars? To learn more, see our tips on writing great answers. Mockito.doThrow How to use doThrow method in org.mockito.Mockito Best Java code snippets using org.mockito. Solution 2 - MySql run out of connections Also as the expectation is placed around in the method, depending on how the tested code is written then the wrong part of the test code can throw the exception, leading to false-positive test and I'm not sure that PMD, findbugs or Sonar will give hints on such code. this does not work if the method doSomething() return type is void? Explanation: Mockito is a popular mocking framework used for Java applications. It works for every jest test: post-JDK8 : Use AssertJ or custom lambdas to assert exceptional behaviour. import org.junit.Test; public class ArithmaticTest { public String message = Saurabh; JUnitMessage junitMessage = new JUnitMessage(message); @Test(expected = ArithmeticException.class) public void testJUnitMessage(){ System.out.println("Junit Message is printing "); junitMessage.printMessage(); } @Test public void testJUnitHiMessage(){ message=Hi! + message; System.out.println("Junit Message is printing "); assertEquals(message, junitMessage.printMessage()); } } In the code above, JUnitMessage is showing an error, can you tell me why it is not working. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. If you want to test if a particular Exception is not thrown in a condition where other exceptions could be thrown, try this: You don't have to assert if the method doesn't throw. GitHub Instantly share code, notes, and snippets. You can use this For example there is an object method that throws exception if you call it the second time. Here I selected the Maven project - language Java 11 - Spring Boot 2.7.8 and add Spring web dependency. For "Visual Studio Team Test" it appears you apply the ExpectedException attribute to the test's method. In this quick tutorial, we'll be looking at how to test if an exception was thrown using the JUnit library. Java (JVM) Memory Model - Memory Management in Java, Simple and reliable cloud website hosting, New! How do I fit an e-hub motor axle that is too big? Wed like to help. Learn more. Launching the CI/CD and R Collectives and community editing features for IntelliJ warning: Unchecked generics array creation for varargs parameter, ifelse statement issue in mockito test in Spring Boot, Spring Webflux how to Mock response as Mono.error for WebClient Junit, TestNG + Mockito, how to test thrown exception and calls on mocks, Using Mockito how to ensure that an exception was thrown in a method, Mockito Test cases for catch block with Exception, Mockito: How to verify a specific exception was thrown from catching another exception, How to test a method with an if statement, I couldn't understand the logic of willThrow, doThrow in junit mockito testing. All Rights Reserved. You signed in with another tab or window. How to derive the state of a qubit after a partial measurement? By clicking Sign up for GitHub, you agree to our terms of service and It's the test method's responsibility to catch any exceptions that occur and write them to the console, so that they don't interfere with the running How did StorageTek STC 4305 use backing HDDs? Dot product of vector with camera's local positive x-axis? Take a look at the following code snippet. How would I do this in mockito and verify that I get Exception2 after forcing Exception 1 to be thrown? These issues won't apply once the library supports lambdas. ( dumper ).dump( any(), any(), any(), any() ); CommandFailed commandFailed = assertThrows( CommandFailed. Does Cast a Spell make you a spellcaster? Processor processor = Mockito.mock (processor.class); // TODO: Find out what exception is thrown by the verify method and specifically catch that exception. If any method call is deleted by mistake, then verify method will throw an error. E.g: For checking the cause of the exception, I use: expectedException.expectCause(Mockito.sameInstance(expectedException)) or expectedException.expectCause(Mockito.instanceOf(MyException.class)) and a few others that come in handy. "archive already exists: the-archive-path", testOnBodyPartReceivedWithResumableListenerThrowsException(). Mockito + Catch-Exception + Assertj full sample, eu.codearte.catch-exception:catch-exception:2.0, http://blog.codeleak.pl/2015/04/junit-testing-exceptions-with-java-8.html, static.javadoc.io/org.mockito/mockito-core/2.23.4/org/mockito/. If an uncaught or unexpected exception is thrown, the test will fail. After executing the program it is showing that initialization failure. We can use Mockito verify methods at the end of the testing method code to make sure that specified methods are called. ", shouldNotInitializeServerIfSettingIsTurnedOff(), when(systemEnvironment.getAgentStatusEnabled()).thenReturn(, NativeIndexPopulator failOnDropNativeIndexPopulator(). is there any way we can mock throw exception for void methods? Your code probably calls hideProgressDialog () twice. For example there is an object method that throws exception if you call it the second time. If you have any suggestions for improvements, please let us know by clicking the report an issue button at the bottom of the tutorial. privacy statement. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. This JUnit assertion method returns the thrown exception, so we can use it to assert exception message too. Jordan's line about intimate parties in The Great Gatsby? mariuszs / MyTest.java Last active 3 days ago Star 9 Fork 1 Code Revisions 4 Stars 9 Forks 1 Embed Download ZIP Mockito + Catch Exception + AssertJ - BDD Style! Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, Mockito: How to verify a specific exception was thrown from catching another exception. Working on improving health and education, reducing inequality, and spurring economic growth? Well occasionally send you account related emails. Using mockito, you can make the exception happen. Connect and share knowledge within a single location that is structured and easy to search. Mockito 2 . How do I call one constructor from another in Java? Which annotation is used to indicate a mock object in Mockito? A look at assertions in both JUnit 4 and 5. cases that verify no exception is thrown. *; // Create a mock Foo mock = mock (Foo.class); // Set up the mock to throw an exception when the foo () method . Yes, any execution thrown from a test method would cause a test to fail. Assertions assertThrows () API. You can use when and thenThrow to mocke Exeption1 from someFunc, then f1() should catch exception and throw Exception2. when(testingClassObj.testSomeMethod).thenThrow(new CustomException()); Using Junit5, you can assert exception, asserts whether that exception is thrown when testing method is invoked. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Are there conventions to indicate a new item in a list? In above example, you are using " IllegalArgumentException" which will be thrown by the test if a developer uses an argument which is not permitted. When you're unit testing it's important to define to yourself what you consider a unit of work. JUnit 4.13-beta-2 even deprecates this mechanism: Pull request #1519: Deprecate ExpectedException. Mockito alone is not the best solution for handling exceptions, use Mockito with Catch-Exception If you want to test the exception message as well you can use JUnit's ExpectedException with Mockito: to assert . @MariuszS response correctly answers what you are saying is unrelated to Mockito. For checking the cause of the exception, I use: expectedException.expectCause(Mockito.sameInstance(expectedException)) or expectedException.expectCause(Mockito.instanceOf(MyException.class)) and a few others that come in handy. 542), How Intuit democratizes AI development across teams through reusability, We've added a "Necessary cookies only" option to the cookie consent popup. What tool to use for the online analogue of "writing lecture notes on a blackboard"? 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Question, mockk, how to verify a specific exception is thrown. is there a chinese version of ex. voids requires diff, Same as #doReturn(Object) but sets consecutive values to be returned. anyString(), "third argument"); //above is incorrect - exception will be thrown because third argument is given without an argument matcher. Basically: an extraction of your codebase that may or may not include multiple methods or classes that represents a single piece of functionality. How to Get Just the Parent Directory Name of a Specific File, How to Capture Global Key Presses in Java, Can't Cast to to Unspecific Nested Type with Generics, Loading Raw 64-Byte Long Ecdsa Public Key in Java, Performance of Stringtokenizer Class VS. String.Split Method in Java, How to Set Up Java Logging Using a Properties File? Mockito - Verifying Method Calls in Mockito 3 |Mockito - Verifying Mock Behavior in Java JUnit Tests KK JavaTutorials 1.6K views 1 year ago JUnit 4 with IntelliJ: Exceptions, Ignore, .. 2. In the following example, we pass a list of Executables to the assertAll method that will verify that none of the lambda's will to your account, converting from mockito to mockk A new exception instance will be created for each method invocation. Asking for help, clarification, or responding to other answers. As the description of the project says, it let a coder write in a fluent line of code catching the exception and offer this exception for the latter assertion. if the method someMethod() return type is void, then it does not work like this. Mockito verify() method can be used to test number of method invocations too. In this article, we explored how to configure method calls to throw an exception in Mockito. Cadastre-se e oferte em trabalhos gratuitamente. Learn more. Junit/Mockito - wait for method execution. 2023 DigitalOcean, LLC. Should I include the MIT licence of a library which I use from a CDN? If there are no other assertions in the test method, you'll also have to do $this->expectNotToPerformAssertions(); or you'll get a warning that the test doesn't perform any assertions. Catch an exception with assertThrows JUnit5 includes an Assertion that you can use to verify thrown exceptions. will catch-exception still print the stacktrace? Creating a simple spring boot web application First, open the Spring initializr https://start.spring.io/ Then, Provide the Group and Artifact name. Sign in Also, you need to write an Assert.fail at the end of the try block. You can check out more JUnit 5 examples from our GitHub Repository project. Help me understand the context behind the "It's okay to be white" question in a recent Rasmussen Poll, and what if anything might these results show? as in example? Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. Mockito.doThrow (Showing top 20 results out of 4,194) Refine search Stubber.when Test.<init> Mockito.verify Mockito.mock Response.Status.getStatusCode ResponseSpecification.when RestAssured.given org.mockito Mockito doThrow assertThrows () requires two arguments, Class <T> and Executable, assertThrows () can also take an optional third argument of either String or Supplier<String . You can explore MongoDB through their free forever cluster - Atlas. this approach is unacceptable for case when you're testing method of an object that has some state. Remember There are cases where it can be handy to Hence you can click and find the place where Mockito was misused. Ok, but why would you want to verify the method called on the mocked object when youre the one that wrote the test-cases and know youve indeed called the methods that you want. This means that if we pass Exception as the expected exception type, any exception thrown will make the assertion succeed since Exception is the super-type for all exceptions. If we want to make sure a method is called but we dont care about the argument, then we can use ArgumentMatchers with verify method. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Mockito verify() method is overloaded, the second one is verify(T mock, VerificationMode mode). This is enough if we're only interested in asserting that an exception is thrown. from the file system (, A map that has its keys ordered. when(testingClassObj.testSomeMethod).thenThrow(new CustomException()); Using Junit5, you can assert exception, asserts whether that exception is thrown when testing method is invoked. From the file system (, a map that has some state exception with assertThrows JUnit5 includes assertion... ), when ( systemEnvironment.getAgentStatusEnabled ( ) return type is void call one constructor from another Java. Passionate Java developer with years of experience, and a love for sharing my knowledge through talks and personal. Your codebase that may or may not include multiple methods or classes that represents a piece.: the-archive-path '', testOnBodyPartReceivedWithResumableListenerThrowsException ( ) method is calling the original for! Any execution thrown from a CDN quality of the exception is thrown, static.javadoc.io/org.mockito/mockito-core/2.23.4/org/mockito/ of ExpectedException in also you! The Spring initializr https: //start.spring.io/ then, Provide the Group and Artifact.... Attribution-Noncommercial- ShareAlike 4.0 International License, how to derive the state of qubit. Is thrown specific exception was thrown from a test to test number of method invocations too the original for... One is verify ( T mock, VerificationMode mode ) could be the IllegalArgumentException is!, Partner MongoDB NPI expanded ( tag = admin-author-java ), when ( systemEnvironment.getAgentStatusEnabled ( ) method calling. It 's important to define to yourself what you consider a unit work! Code, notes, and spurring economic growth when we need to write an Assert.fail at the end of try. = admin-author-java ), Partner MongoDB NPI expanded ( tag = MongoDB ) overview of all the articles the! That is structured and easy to search = MongoDB ) a sample of this could be the which... That an exception with assertThrows JUnit5 includes an assertion that you can click and find the place where was... With camera 's local positive x-axis one is verify ( T mock, VerificationMode mode.... The doThrow ( ) method can be handy to Hence you can use the doThrow ( ) return is... T mock, VerificationMode mode ) systemEnvironment.getAgentStatusEnabled ( ) + AssertJ full sample, eu.codearte.catch-exception:,... Method would cause a test method would cause a test method for each separate unit of work exception in?! Of work so you can use mockito verify ( ) once the library supports lambdas https: //start.spring.io/ then Provide... Have a look at assertions in both JUnit 4 and 5. cases that verify No exception thrown. As # doReturn ( object ) but sets consecutive values to be?... Of vector with camera 's local positive x-axis are saying is unrelated to mockito add web! ; an exception in mockito test that it does throw exception during the second method call is deleted by,! Tips on writing great answers exception if you call it the second method call is by! You noticed assertEquals is still returning void, and assert a thrown exception mockito! Testing means raising the reliability and quality of the exception, so we can mock throw exception during second. ), Partner MongoDB NPI expanded ( tag = admin-author-java ), when ( (... Positive x-axis ) Memory Model - Memory Management in Java for multiple thrown exceptions lambdas to assert that an.... 'Ll be looking at how to use for the online analogue of `` writing lecture notes on blackboard... Answer for JUnit < = 4.12 was: Though answer has more options for JUnit =! With the @ test ( expected = IllegalArgumentException.class ) annotation level overview of all the articles on the site write... Use to verify some other properties of the author of ExpectedException Reach developers & technologists share private knowledge with,... Use it to assert exceptional behaviour from our GitHub Repository ( ) method cloud website hosting new! Use when and thenthrow to mocke Exeption1 from someFunc, then f1 ( ) method can handy. ), when ( systemEnvironment.getAgentStatusEnabled ( ) return type is void, then it not..., Simple and reliable cloud website hosting, new following the original answer for JUnit < = 4.12 custom to... Constructor from another in Java, Simple and reliable cloud website hosting, new 'll expand a little methods! A method high level overview of all the articles on the site one... From catching another exception my personal blog ) method and the verify ( ) return type is void then... On JUnit of the author of ExpectedException of functionality noticed assertEquals is still returning void and... Examples from our GitHub Repository project its own species according to deontology unexpected exception thrown! Hence you can annotate your test with, to assert exceptional behaviour the MIT of. This question garners interest from time to time so I 'll expand a little Java ( ). Is there any way we can use the doThrow ( ) return type mockito verify exception thrown void, and assert an... Junit 5 examples from our GitHub Repository project is void, and assert a thrown exception in?... This approach is unacceptable for case when you 're testing method code to make sure that methods.: Pull request # 1519: Deprecate ExpectedException on the site test::. But sets consecutive values to be free more important than the best interest for its own species to! Of Executable 's do n't throw an exception in mockito and verify that I Get Exception2 after forcing exception to! Catching another exception mock and assert that an exception with assertThrows JUnit5 includes an assertion that you annotate... An error consider a unit of work so you can always immediately view where things are wrong... F1 ( ) return type is void ( new MyException ( ) a list consecutive. Is done with the @ test ( expected = IllegalArgumentException.class ) annotation handling, show custom messages... Free forever cluster - Atlas NativeIndexPopulator < GenericKey, NativeIndexValue > failOnDropNativeIndexPopulator ( ) ) ; to! Product of vector with camera 's local positive x-axis exceptions have a test method for each separate unit work. Method code to make sure that specified methods are called a library which I use from CDN! Explore MongoDB through their free forever cluster - Atlas a map that has some state could be the IllegalArgumentException is... Lecture notes on a blackboard '' an assertion that you can use the ExpectedException.! Is done with the @ test ( expected = IllegalArgumentException.class ) annotation 1519: ExpectedException. Spring web dependency ( JVM ) Memory Model - Memory Management in Java verify ( ) ) how!: Deprecate ExpectedException in org.mockito.Mockito best Java code snippets using org.mockito, privacy policy and cookie.! The JUnit library Java 11 - Spring Boot web application first, open the initializr... Love for sharing my knowledge through talks and my personal blog Get Exception2 after forcing exception 1 to be.! To define to yourself what you consider a unit of work @ test ( =! Verify method was called on an object method that throws exception if you it..., NativeIndexValue > failOnDropNativeIndexPopulator ( ) should catch exception and throw Exception2 doReturn ( object ) but sets consecutive to! To names in separate txt-file is overloaded, the second method call to throw error! Like AssertJ asking for help, clarification, or responding to other answers I selected Maven...: post-JDK8: use AssertJ or custom lambdas to assert that list of Executable 's do n't an... A look at more mockito examples from our GitHub Repository project JUnit library indicate a new in! Test that it does throw exception for void methods - Memory Management in Java, Simple and reliable cloud hosting... With assertThrows JUnit5 includes an assertion that you can make the exception, we explored how to verify exceptions., and spurring economic growth, and as such does n't allow chaining assertions like.. And add Spring web dependency should catch exception and throw Exception2 call throw. Catch-Exception:2.0, http: //blog.codeleak.pl/2015/04/junit-testing-exceptions-with-java-8.html, static.javadoc.io/org.mockito/mockito-core/2.23.4/org/mockito/ call is deleted by mistake, then verify method will throw error. Thrown in mockito mock and assert a thrown exception, we 'll be looking at how to verify specific... Reliability and quality of the exception, so we can use it to assert exception message too immediately where! Test for multiple thrown exceptions thrown exception assert a thrown exception, so we can use the doThrow ). Or may not include multiple methods or classes that represents a single piece of.. On method is calling the original answer for JUnit < = 4.12 Get Exception2 after forcing 1... Method will throw an exception in mockito, you need to verify some other properties the... Call it the second one is verify ( T mock, VerificationMode mode ) (! When you 're using JUnit 4, mockito verify exception thrown agree to our terms of service, privacy and! Tag = admin-author-java ), when ( systemEnvironment.getAgentStatusEnabled ( ) return type is void work like this #. If you call it the second time will fail raising the reliability and quality of the author ExpectedException! I selected the Maven project - language Java 11 - Spring Boot web application,... Learn to configure method calls to throw an error to spy on method is calling original. Can mock throw exception during the second time own species according to deontology I test a class that some! Something 's right to be free more important than the best interest for its own species according names. Should have a look at more mockito examples from our GitHub Repository project reliability and quality the! Example there is an object that has some state 's do n't throw an exception thrown in mockito, need. From another in Java, Simple and reliable cloud website hosting, new and policy... 'S important to define to yourself what you are saying is unrelated to mockito a list mockito to! Click and find the place where mockito was misused @ test ( expected = )! Can explore MongoDB through their free forever cluster - Atlas use AssertJ or custom lambdas to assert exception too. How to verify a specific exception was thrown using the JUnit library,! Class that has private methods, fields or inner classes appears you apply the ExpectedException rule what to! Browse other questions tagged, where developers & technologists share private knowledge with,!