How to Mock Static method of Util class in Service Implementation

[PraveenaTh]

Hi Team,

I have a git repository(Repo A) which has dependent on other main repository (Repo B). In Repo A we have a service implementation. In Repo B we have common code, here we have a util class and it has a static methods. We are calling these static methods from Repo B in Repo A. Now we are writing the Junit implementation for service class in Repo A. I am trying to mock this static method as mentioned below. Mockito.mockStatic(Utils.class); Mockito.when(Utils.getString()).thenReturn("Mocked string"); . i have added dependencies in my Repo A core POM and parent POM files.

I am facing issue i am not able to use the static method. I am seeing error "Cannot resolve method 'mockStatic' in 'Mockito'". Can someone help me on this issue. Your help is much appreciated.

https://sourcedcode.com/blog/aem/junit/junit5/mocking-static-methods-in-junit5 

Thanks,

Praveena.

[Mahedi_Sabuj]

You can check the below community post
https://experienceleaguecommunities.adobe.com/t5/adobe-experience-manager/junit-for-accesscontroluti... 

Additionally, you can explore the GitHub commit where we've mocked the HttpClient.newBuilder static method. https://github.com/MahediSabuj/aem-demo/commit/677d316157b98757490d59fa723ea77602127405 

[sravs]

Hi @PraveenaTh , Please make sure you are using latest version of Junit and mockito dependencies.
MockedStatic was introduced in mockito 3.4.3. If your mockito version is previous version of that it won't work. 

Please try with below,

<dependency>
    <groupId>org.junit.jupiter</groupId>
    <artifactId>junit-jupiter-api</artifactId>
    <version>5.9.3</version>
    <scope>test</scope>
</dependency>
<dependency>
    <groupId>org.junit.jupiter</groupId>
    <artifactId>junit-jupiter-engine</artifactId>
    <version>5.9.3</version>
    <scope>test</scope>
</dependency>
<dependency>
    <groupId>org.junit.platform</groupId>
    <artifactId>junit-platform-launcher</artifactId>
    <version>1.9.3</version>
    <scope>test</scope>
</dependency>
<dependency>
    <groupId>org.mockito</groupId>
    <artifactId>mockito-core</artifactId>
    <version>5.3.1</version>
    <scope>test</scope>
</dependency>
<dependency>
    <groupId>org.mockito</groupId>
    <artifactId>mockito-junit-jupiter</artifactId>
    <version>5.3.1</version>
    <scope>test</scope>
</dependency>
<dependency>
    <groupId>junit-addons</groupId>
    <artifactId>junit-addons</artifactId>
    <version>1.4</version>
    <scope>test</scope>
</dependency>
<dependency>
    <groupId>io.wcm</groupId>
    <artifactId>io.wcm.testing.aem-mock.junit5</artifactId>
    <version>5.1.0</version>
    <scope>test</scope>
</dependency>

[EstebanBustamante]

Hi, 

The problem is that in some Mockito versions, the mockStatic method was disabled by default. There are a couple of ways to configure this, but I think the easiest one is just to use the mockito-inline dependency instead of mockito-core. Try something like this:

      <dependency>               
        <groupId>org.mockito</groupId>
        <artifactId>mockito-inline</artifactId>             
        <version>5.2.0</version>              
        <scope>test</scope>       
      </dependency>

References: 

https://wttech.blog/blog/2020/mocking-static-methods-made-possible-in-mockito-3.4.0/

https://github.com/mockito/mockito/issues/2528

Hope this helps