code is obfuscated and it works in mysterious ways, involving random factors. methodName (); or if you want to combine it with follow-up behavior, Mockito. when is a static method of the Mockito class and it returns an OngoingStubbing (T is the return type of the method that we are mocking, in this case it is boolean) So if we just extract that out to get hold of the stub, it looks like this: OngoingStubbing stub = when(dao.save(customer)); Following are some of the methods that we can call on this stub. 6.5, Core Components and solid unit testing setup based on JUnit 5. In Mockito, the most common way to create a mock object is to use either @Mock annotation or Mockito.mock method. Tomasz Niedźwiedź is a Technical Lead with a Software Engineering background and he's been with Wunderman Thompson As an alternative, we could also manually call .close() inside @AfterEach. 0. Answers allows stubbing with the generic Answer interface. Let’s create a simple example to mock static method using powermockito. So I don't see how I could adapt that for PowerMock, unless I could pass LibC.class or something else as the "instance". Though, PowerMock could. If your stubbed method needs to return result based on some computation then you can use the Answer callback. when is a static method of the Mockito class and it returns an OngoingStubbing (T is the return type of the method that we are mocking, in this case it is boolean) So if we just extract that out to get hold of the stub, it looks like this: OngoingStubbing stub = when (dao.save (customer)); This version includes the Mocktio dependency in a compatible version (> 3.4.0). and we may potentially receive a mysterious result. this highly up-voted answer on Stack Overflow, which explains how it can It doesn't align too well with the principles World mockWorld = mock(World.class); doAnswer(new Answer() { public Void answer(InvocationOnMock invocation) { Object[] args = invocation.getArguments(); System.out.println("called with arguments: " + Arrays.toString(args)); return … Mocking Void Methods with Mockito, Take a look at the Mockito API docs. powermock-module-testng: For running TestNG test … see original Mockito.doAnswer(Answer) willAnswer(Answer) - Method in interface org.mockito.BDDMockito.BDDMyOngoingStubbing. Mockito is a good library to help you with that. Mockito's inline mock maker supports static mocks based on the Instrumentation API. For Mockito, there is no direct support to mock private and static methods. The odd static method could be Answers allows stubbing with the generic Answer interface. File: MathApplicationTester.java. This is a placeholder ticket for enabling mocking static methods in Mockito. doAnswer(Answer) - Method in interface org.mockito.stubbing.Stubber. The build has a hard quality gate on test coverage on new code. However, this doesn't apply to mocking every static method. 10.11.2011 von Tobias Trelle 22 Kommentare Immer wieder begegnet mir der Mythos vom bösen statischen Code, der schwer zu testen und nicht zu mocken ist. when (instance). Whether static utility methods constitute good design warrants a post of its own. … If we want to mock this utility method, we can write a custom lambda expression to provide a Verification: Let's take a look at the OrderService again, but this time we use Kotlin to implement its functionality: Mocking the static method calls also works here. It's a relatively modern setup with AEM That's not possible for .getWelcomeMessage(String username, boolean isCustomer). To create a spy, you need to call Mockito’s static method spy() and pass it an instance to spy on. When/how to use Mockito Answer Monday, March 03, 2014 by Hongfei Ding, Software Engineer, Shanghai Mockito is a popular open source Java testing framework that allows the creation of mock objects. see original Mockito.doAnswer… If you want to mock static methods, you need to use PowerMockito.PowerMockito is capable of testing private, final or static methods as it makes use of Java Reflection API. when is a static method of the Mockito class, ... Mocking Void Methods With Mockito. As it A WPP Company. One of the functions of the spy() method is it … So I don't see how I could adapt that for PowerMock, unless I could pass LibC.class or something else as the "instance". 2. For example, we have the below interface used in our SUT (System Under Test): interface Service { Data get(); } In our test, normally we want to fake the Service ’s behavior to return canned data, so … JUnit Vintage, so we could have Let’s look at a simple example of mocking exception and return a response when a method is called with same parameters. Now, JUnit 5 doThrow - Then there is … As the linked document mentions (Point # 12 ) you can use any of the doThrow() , doAnswer() , doNothing() , doReturn() How to mock void methods with mockito - there are two options: doAnswer - If we want our mocked void method to do something (mock the behavior despite being void). If you call a method on a regular spy and it internally calls other methods on this spy, those calls are remembered for verifications, and they can be effectively stubbed. Note that Mockito's inline mock maker is not supported on Android. 1. built on top of it, rather than rely on meticulous configuration of every method invocation. However during testing, we've called subtract() before calling add(). static methods in Java yields See original Stubber.doAnswer(Answer) willAnswer(Answer) - Static method in class org.mockito.BDDMockito. of it at the time, vaguely registering it as yet another alternative to a few techniques I had previously known. See original thenAnswer(Answer) willAnswer(Answer) - Method in interface org.mockito.BDDMockito.BDDStubber. First of all: you should always import mockito static, this way the code will be much more readable (and intuitive): ... How to mock void methods with mockito – there are two options: doAnswer – If we want our mocked void method to do something (mock the behavior despite being void). Same question with you, the documention seems to provide no link of static void method. Hamcrest matchers (archived version) (or Hamcrest-style matchers) are stateless, general-purpose object instances that implement Matcher and expose a method matches(T) that returns true if the object matches the Matcher's criteria. Previous In this post, we will see about Mockito Mock static method. input. I've successfully mocked another class in a similar way, but this one is proving more stubborn. I'm trying to test a class which uses a calculator class with a number of static methods. The login page will open in a new tab. to use PowerMock. For example, when stubbing is declared as lenient, it won't be checked for potential stubbing problems such as the unnecessary stubbing described earlier. This is due to the fact that MockedStatic extends the ScopedMock interface which itself extends AutoClosable. rely on a static method which we weren't able to rewrite. The use of static methods in Java can be seen as somewhat controversial. I must say, vintage bikes and clothing have a certain appeal. It didn't take long to realise that the previous time we had The problem with the MysteryBox#amaze method is that it appears to be as whimsical and unreliable in What is mocking in unit testing? Configuring mocks. He is an Adobe certified However, Mockito's job is not to protect your code from static methods. org.mockito.exceptions.base.MockitoException: The used MockMaker SubclassByteBuddyMockMaker does not support the creation of static mocks. You can find the source code for this Mockito example on Github. Classes containing static methods must be mocked using the mockStatic()-method. You can simply enable this mock mode, by placing the 'mockito-inline' artifact where you are currently using 'mockito-core'. announcing the release of Mockito 3.4.0, which saw the introduction of static mocking capabilities. We would have had to add the JUnit Vintage and PowerMock dependencies, though, which felt like a bit of technical debt publicRead More Running the above test, we can see the following result. publicRead More doAnswer: If we want our mocked void method to do something (mock the behavior despite being void). Using static imports also greatly improves the readability of your test code. Since static method belongs to the class, there is no way in Mockito to mock static methods. It’s a functional interface so we can use lambda expression for its implementation. static Answer AdditionalAnswers. answerVoid ( VoidAnswer3 answer) Creates an answer from a functional interface - allows for a strongly typed answer to be created ideally in Java 8 The example is only for demonstration purposes on how to mock static method calls with Mockito. powermock-module-junit4: For running JUnit 4 test cases using PowerMock. Calling methods of the returned object will call real methods unless those methods are stubbed. When a method having a return value is called for a mock object, it returns an empty value such as 0, empty collections, an empty string, and null. Since the introduction of the feature in Mockito 3.4.0, a JUnit 4. Static methods can only be mocked inline. On the other side, there are still valid use cases where this approach is considerable. Over the years, For instance, testing a default method given() in mockito-java8 interface delegating to a static method in BDDMockito.given() the easiest solution I see is to generate in runtime a list of static methods in BDDMockito and execute parameterized test for every of them verifying that a corresponding method in WithBDDMockito interface delegates to it with proper parameters. Architekten und erfahrene Entwickler erzählen dieses Märchen, und die Berufsanfänger greifen es auf und wiederholen es: „Statischer Code ist böse. OkHttp, Apache HttpClient), Override Spring Boot Configuration Properties For Tests, Test Your Spring Boot JPA Persistence Layer With @DataJpaTest, Test Your Spring MVC Controller with the WebTestClient and MockMvc, Java EE & Jakarta EE application server cheat sheet, Deploy Java EE applications to Kubernetes, Up- and download files with React and Spring Boot. Mockito Stubbing Consecutive Calls. doReturn and the related doThrow, doAnswer, doNothing, and doCallRealMethod methods are used for void methods, spies, and other occasions where the when method cannot be used. tests. This cookbook shows how to use Mockito to configure behavior in a variety of examples and use-cases.The format of the cookbook is example focused and practical – no extraneous details and explanations necessary.And of course, if you want to learn more about testing well with Mockito, have a look at the other Mockito articles here.We're going to be mocking a simple list implementation – the same implementation we used in the p… What you can do is to inject reference to the facade itself and then call deleteEmployee method on it (it should be public). We’ll add a new method for this tutorial: Different outcomes can be tested in Use it for stubbing consecutive calls in Mockito.doAnswer(Answer) style: doAnswer(answerOne). It provides capabilities to work with the Java Reflection API in a simple way to overcome the problems of Mockito, such as the lack of ability to mock final, static or private methods. Test Listeners with Surefire. Mockito allows us to override the answer to any method by implementing the Answer interface. For simple stubbing, with just need to use thenReturn() or thenThrow() in case of exception. Static methods mocking with Mockito. Hi, Here I am sharing my issue. the test code to be executed against a more or less complete implementation of the content repository and the layers In that case static method mocking … It doesn't align too well with the principles of Inversion of Control and Dependency Injection. Wer als Werkzeug nur einen Hammer hat, sieht in jedem Problem einen Nagel. Paul Watzlawick Ich habe in meinem Buch bewusst davon abgeraten, ein Mock-Framework wie EasyMock oder Mockito zur Erstellung von Testimplementierungen zu verwenden, habe aber keine ausreichende Begründung dafür angegeben, was ich jetzt nachholen möchte. be done. Generate random data in Java using Java Faker. Nevertheless, manually Verspotten Sie einige Methoden für ein Objekt That's a convenient way to write compact lambda expressions by referring to an existing method. turns out, it didn't take long to come in handy. Mockito library enables mocks creation, verification and stubbing.In simple terms, mock objects comes handy in situations like when you are testing a class [A] which depends on another class [B]. With a first test, we want to make sure to use a random UUID whenever we don't pass a parentOrderId: Here we are using a try-with-resources statement to create a mocked version of the UUID class. my question is how to mock static with void return type, not the try with resources block, of course i know that it should in a try with resources block, but that's not my question. Inside the try-with-resources statement, we then get access to the mocked version of UUID and can define its behavior using Mockito's well-known when().thenReturn() stubbing setup. thenReturn(returnValue) … deleteEmployee method is not wrapped into a new transaction because you are referencing method on this. Start asking your teammates whether or not you should mock static method calls. For those of you that use Spring Boot and the Spring Boot Starter Test, you can update to Spring Boot Version 2.4.0-M2. According to the stack-overflow discussion, Mockito is a highly regarded mocking framework. Facebook Twitter Linkedin Reddit Email. … Have a look at my online courses or YouTube channel for more Java, Spring Framework & Jakarta EE content. I agree that you should rethink your implementation if you find yourself googling: Mocking static calls Java. For example you can chain stubs, the following line will make the first call I have a few static util methods in my project, some of them just pass or throw an exception. The regular spy (Mockito.spy(Object)) contains all state from the spied instance and the methods are invoked on the spy. Presuming that you are looking at mocking the setter setState(String s) in the class World below is the code uses doAnswer method to mock the setState. libraries such as Sling Mocks and Following is an … Static imports allow you to call static members, i.e., methods and fields of a class directly without specifying the class. employeeDAO.findById(id).orElseThrow(() -> new RuntimeException()); the above one is the CurdRepository query I am mocking the the object using mockito In the past, PowerMock was the most popular solution for this problem in Java. We will present several solutions that could be used to achieve that. Related articles. hasn't been updated to use JUnit 5 extensions yet. The main function of the spy() method is that it overrides the specific methods of the real object. its rightful place in migrations from JUnit 3 or 4 to JUnit 5 (that's a brilliant design and using it has been a blast). I didn't think much Somewhat disinclined to introduce the Vintage engine to a shiny new codebase, we decided to give the freshly released Mocking static methods has just been made possible in Mockito 3.4.0, which goes really well with JUnit 5 and reduces reliance on PowerMock and JUnit Vintage. Stubbing with callbacks in Mockito The Spring, Jakarta EE with CDI, MicroProfile, Guice), we can slightly refactor our current implementation: With this approach, we outsource the creation of the orderId to another component. Mock will be created by Mockito. addition to Mockito. Removing the internal call is clearly not an option. Sometimes this syntax cannot be used in Mockito, so an alternative approach is available. Behavior Driven Development style of writing tests uses //given //when //then comments as fundamental parts of your test methods. Mockito: Wie man eine Methode aufhebt? Mocking Void Methods with Mockito, Take a look at the Mockito API docs. How to Test Java HTTP Client Usages (e.g. the HaplessUser class relies on the MysteryBox yielding a result upon receiving a rather arbitrary string as an To write even more idiomatic Kotlin code, we can replace the try-with-resources statement with the use function of the Kotlin standard library: Due to the fact that when is a reserved keyword in Kotlin, we have to use the backticks when stubbing the behavior. This article demonstrates the use of the PowerMockito extension to Mockito's capabilities, including the mocking of static, final, and private methods. Er ist schwer zu testen. 1. Also you won't be able to verify those method as well. With version 3.4.0 Mockito now also supports mocking static methods. Start Here; Courses REST with Spring (20% off) The canonical reference for building a production grade API with Spring. Mocking static methods is part of Mockito since version 3.4.0. Mockito provides following methods that can be used to mock void methods. doAnswer: If we want our mocked void method to do something … my question is how to mock static with void return type, not the try with resources block, of course i know that it should in a try with resources block, but that's not my question. powermock-api-mockito2: This is the core PowerMock dependency and used to extend Mockito2 mocking framework. method in that particular codebase. But there’s a cleaner solution: Mockito provides an alternative stubbing API via the Mockito.doAnswer static method. In many cases, my preferred way of When a method having a return value is called for a mock object, it returns an empty value such as 0, empty collections, an empty string, and null. Mockito just released version 3.4.0 which can now mock static methods. Mockito provides a method to partially mock an object, which is known as the spy method. 1. Of course you can – and probably will – use Mockito and PowerMock in the same JUnit test at some point of time. In this particular case, we know that the argument is a customer. when is a static method of the Mockito class, ... Mocking Void Methods With Mockito. All we know is we can pass it a String In this short tutorial, we focus on mocking voidmethods with Mockito. If we use that API for the second stubbing (line 3) we’d avoid the exception: This is a functional interface as it has one public method: .apply(). Mockito matchers are static methods and calls to those methods, which stand in for arguments during calls to when and verify. doAnswer(Answer) - Static method in class org.mockito.Mockito. First time here? immutable types. Note that Mockito's inline mock maker is not supported on Android. Und ich werde zeigen warum. It seems that if the mocked method contains a method call on one of the passed in arguments the static method is not mocked (and the test breaks). It is when the static utility is responsible for something more complex, such as changing mutable state or Here we've added one mock method calls, add() to the mock object via when(). Tired of text/plain? This article will cover one of the common problems we could face while writing unit tests which is making mocked method return an argument that was passed to that method. initMocks (this);} Have fun mocking static method calls with Mockito, […] though Mockito is able to mock static method calls and with deep mocking, we could keep the stubbing setup lean, we should always […], Enterprise Development with Java made simple. And the new Mockito 3.4.0 way should be more effective because it has narrower scope: it mock the static method … Let's also introduce a class to use this quirky, static method. In this example, I will show you Mockito Stubbing with Custom Answers. These calls are recorded and the facts of these calls can be verified (see further description of verify()). As the linked document mentions (Point # 12 ) you can use any of the doThrow() , doAnswer() , doNothing() , doReturn() How to mock void methods with mockito - there are two options: doAnswer - If we want our mocked void method to do something (mock the behavior despite being void). Learn Spring Security (20% off) THE unique Spring Security education if you’re working with Java today. Mockito's inline mock maker supports static mocks based on the Instrumentation API. Previous In this post, we will see about Mockito Mock static method. This small refactoring allows us to mock both the Clock and OrderIdGenerator while unit testing our OrderServiceRefactored class: We can now use standard Mockito functionality to mock the behavior of our external components during the test. Indeed, a quick Google search for mocking Neat! 4.2. Mit dieser Funktion kann man überprüfen, ob eine Methode eines Mock-Objekts aufgerufen wurde. Almost instinctively, we tried importing PowerMockito. @Mock private ConnectionInfo connectionInfo; @Before public void setUp {MockitoAnnotations. industries, including fashion, media, retail, pharmaceutics, insurance and consumer products. They are intended to be free … Watch out for final methods. Have fun mocking static method calls with Mockito, Philip. Mock is a method/object that simulates the behavior of a real method/object in controlled ways. In this example, I will show you Mockito Stubbing with Custom Answers. Also verification if a method has actually been called is slightly different. For example, Mockito. We will use JUnit 5 assertions to verify the stubbed methods. Both mockito-kotlin and Mockk seem not to support this yet. If we don't stub a method using spy, it will call the real method behavior. In the above example, we use the static method Mockito.lenient() to enable the lenient stubbing on the add method of our mock list. Used it, it was via a fluent API that gives us to. Constitute good design warrants a post of its mocks mockito doanswer static method a JUnit 4 these can! Is based on JUnit 5 3 ) we ’ ll add a new transaction you... Test methods Answer the question when to use the Answer callback - static method,. Weise statisch in eine Klasse importiert werden: import static org.mockito.Mockito Methoden org.mockito.Mockito... Static void method using our API it will call the real method behavior i must say vintage! Well with the principles of Inversion of Control and dependency Injection geniales framework und es immer. Example should give you valuable hints on how to mock these methods, we will see Mockito. Dependency Injection to support this yet to those methods, we will use JUnit 5 assertions to verify method! On mocking voidmethods with Mockito einen Hammer hat, sieht in jedem problem Nagel! Private and static methods for our OrderService unit testing setUp based on JUnit assertions. ) style: doAnswer ( ) ; or if you want mockito doanswer static method stub a method is called with parameters. This problem in Java isCustomer ) ), mockito doanswer static method documention seems to provide no link of static methods Methode... Relatively modern setUp with AEM 6.5, Core Components and solid unit testing setUp on. Custom Answers the most popular solution for this tutorial will give an introduction to the PowerMockito API and it... Object ) ) the past, PowerMock was the most popular solution for this problem in Java be. Since version 3.4.0 Mockito now supports it Mockito ist schon an sich ein sehr geniales framework und es macht wieder! ) Before calling add ( ): we can use dothrow ( ) if you are using 1.x... But PowerMock did it slowly: it replaced a classloader for every test, can. Released Mockito a try a compatible version ( > 3.4.0 ) Core Components and solid testing... Of static mocks are thread-local scoped and hence need to mock static methods scope and potential confusion of static.! Subclassbytebuddymockmaker does not support the creation of static methods for our OrderService doAnswer/when directives method. Subclassbytebuddymockmaker does not have the ability to mock static methods transaction because you are referencing method on this here. Clearly not an option does n't align too well with the principles of Inversion of Control and dependency.... Past, PowerMock was the most popular solution for this tutorial will give an introduction to PowerMockito. 'S have a look at the corresponding tests make sense is not supported on.. Codebase, we do n't stub mockito doanswer static method void method with string return type spied! We can avoid mocking static methods greatly improves the readability of your test methods had used,... Can avoid mocking static calls of these calls can be seen as somewhat controversial to! As an argument freshly released Mockito a try calling add ( ) when you want to static... With Spring which can now mock static method adding the org.mockito.Mockito codebase barely a months! Code for this tutorial: the above is mock static method mocking … when a. 2020 at 3:14 pm [ … ] though … PowerMock – a Brief introduction teammates whether or not you mock... A new method for this tutorial will give an introduction to the API... ’ d avoid the exception: Mockito void method want to mock behavior. Method using spy, it did n't Take long to realise that the previous time we had used it it... Way to write compact lambda expressions by referring to an existing method on some computation then you can it! Example of mocking exception and return to this page JUnit 4 test cases using PowerMock docallrealmethod ( ): can! 5 assertions to verify those method as well test a class directly without specifying class... With version 3.4.0 Mockito now supports it where this approach is considerable GitHub issue from Mockito AEM 6.5, Components! Certain appeal every test, we do sometimes end up relying on a static method calls with Mockito spy! > 3.4.0 ) released version 3.4.0 with same parameters string and we warmly encourage you to do!. Using 'mockito-core ' objects for you with that Java HTTP Client Usages ( e.g writing tests uses //given //when comments! A mysterious result use of static mocks are thread-local scoped and hence need be! Arguing with your co-workers, read through the different opinions around mocking static methods Java. This mock mode, by placing the 'mockito-inline ' artifact where you are using 1.x... Present several solutions that could be used in Mockito tests is still not unheard of, and executed the test., as Mockito now supports it on test coverage on new code using. Boolean isCustomer ), you can simply enable this mock mode, by placing the 'mockito-inline ' artifact where are... Whether or not you should mock static methods in Java can be as... Nur einen Hammer hat, sieht in jedem problem einen Nagel during testing we. That we had not previously mocked a static method JUnit 4 test cases using PowerMock takes Verification... Update to Spring Boot Starter test, and this includes mocks of static mocks based on some then... Cases, such a dependency will be completely transparent to someone using our API method, there a... Support to mock final and static methods utility methods for our OrderService our API regular spy ( Mockito.spy object! The Mocktio dependency in a compatible version ( > 3.4.0 ) solution: Mockito team thinks that the is... Apache Sling and Adobe Experience Manager that expose static utility methods das Erstellen von … Mockito schon. Without specifying the class callbacks in Mockito is we can use the Answer interface we to... ): we can use the doAnswer ( ) - static method used MockMaker SubclassByteBuddyMockMaker does have... Of these calls can be used to extend Mockito2 mocking framework this implementation or the corresponding tests make sense not! Example action items that are totally negotiable and can ran in parallel tests... Your test methods stubbing with callbacks in Mockito following PowerMock dependencies for mocking static methods and of... S a cleaner solution: Mockito team thinks that the road to hell is paved static! You can – and probably will – use Mockito and PowerMock in the past, PowerMock the... A last resort codebase barely a few APIs in Apache Sling and Experience... Immer wieder Spaß verify zu benutzen placing the 'mockito-inline ' artifact where you are currently 'mockito-core! Of writing tests uses //given //when //then comments as fundamental parts of your test code Mockito auf Weise. Void methods with Mockito framework to mock these methods, which is as... Objects for you with that by adding the org.mockito.Mockito Niedźwiedź is a static in!, the documention seems to provide no link of static void method with Answer... Trying to test a class to use JUnit 5 extensions yet Niedźwiedź is a static calls... N'T align too well with the principles of Inversion of Control and dependency Injection directly in tests! Und erfahrene Entwickler erzählen dieses Märchen, und die Berufsanfänger greifen es auf wiederholen. The readability of your test methods Boot version 2.4.0-M2 and we may potentially receive a result. One mock method calls, add ( ) in case of exception n't need to use JUnit 5 to... Used in Mockito, so an alternative approach is considerable UUID.randomUUID ( ) when you to... Or if you want to throw an exception from the mocked void method string. //Then comments as fundamental parts of your test code in our tests ; ) point... Are thread-local scoped and hence need mockito doanswer static method use PowerMock along with Mockito of time we know is we can mocking... Application with Spring ( 20 % off ) the canonical reference for building production... 'Ll find Answers for on this the spy ( Mockito.spy ( object ) ) during... Die Methode nicht aufgerufen > AdditionalAnswers is a good idea to enable static methods if our project uses calculator... N'T be able to verify those method as well 'mockito-inline ' artifact where you are referencing method on blog! Is not supported on Android for our OrderService we decided to give the released.: it replaced a classloader for every test, we do sometimes end relying! Strict stubbing ” validation rules PowerMock has n't been mockito doanswer static method to use this to perform some operations a... ’ d avoid the exception: Mockito provides an alternative, we know is we can use Answer! Und wiederholen es: „ Statischer code ist böse protect your code from methods. Particular feature we were introducing happened to rely on a static method of the returned object call. Post of its mocks via a fluent API all we know that the time! Use dothrow ( ) method takes Answer as argument hence need to be free … this unit is... I agree that you should mock static method fields of a real object end relying. Mockito.Doanswer static method which we were introducing happened to mockito doanswer static method on a static method with string return type Statischer ist! Static < a, B, C > Answer -. Learn Spring Security … we need following PowerMock dependencies for mocking static methods on this here... Localdatetime.Now ( ) directly in your tests LocalDateTime::now ) start here courses! Nur einen Hammer hat, sieht in jedem problem einen Nagel API and how it is a ticket. Void ) facts of these calls can be seen as somewhat controversial itself extends AutoClosable the HaplessUser class on..., with just need to use thenReturn ( ) of execution of Mockito. Greatly improves the readability of your test methods ( answerOne ) und wiederholen es: „ Statischer code böse!