Mockito provides the following methods that can be used to mock void methods. PowerMock is a JUnit extension the leverages the possibilities of EasyMock and Mockito to mock static methods (and much more). A little over a week ago, I saw a notification on Twitter , announcing the release of Mockito 3.4.0, which saw the introduction of static mocking capabilities. Create a simple java maven project. methodName (); or if you want to combine it with follow-up behavior, Let’s assume the following setup: Our unit under test is the class Calculator which just delegates the addition of two integers to MathUtil which offers only static methods: Mocking Void Methods With Mockito doAnswer : If we want our mocked void method to do something (mock the behavior despite being void). Indeed, a quick Google search for mocking static methods in Java yields this highly up-voted answer on Stack Overflow, which explains how it can be done. 1. the above is mock static method with string return type. As the linked document mentions (Point # 12) you can use any of the doThrow(),doAnswer(),doNothing(),doReturn() family of methods from Mockito framework to mock void methods. Let’s create a simple example to mock static method using powermockito. 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). We're looking for someone who can lead this effort. Same question with you, the documention seems to provide no link of static void method. Static methods mocking with Mockito. Feel free to use annotations instead, but make sure that you agree on a single solution with the rest of your team, so that unit tests are written in a common format. This tutorial illustrates various uses of the standard static mock methods of the Mockito API. This is a placeholder ticket for enabling mocking static methods in Mockito. Mockito offers two equivalent ways of mocking: Using static methods and; Using @Mock annotations. Example action items that are totally negotiable and can ran in parallel. > Mockito argument matchers are still applied to PowerMock'ed mock: > Mockito.verify(mockObj).methodToMockToo(*Mockito.anyInt()*); > > > How to stub void static method to throw exception: > > Just use Mockito semantic of setting up void method stub: > Mockito.doThrow(new Research + discuss whether it is a good idea to enable static methods mocking in Mockito. doThrow (new Exception ()). Previous In this post, we will see about Mockito Mock static method. ; Following is an example of how to use it (not an ideal usecase but just wanted to illustrate the basic usage). For example, Mockito. All the examples in this article use static methods. when (instance). Unit testing can be hard especially when you need to test a method that is static, this tutorial will help you to easily mock static methods. 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