How do I configure PowerMock to work with Mockito 2

1. Ensure Compatibility Between PowerMock and Mockito Versions**

PowerMock version 2.0.0 and above supports Mockito 2. However, there are specific compatibility requirements depending on the exact version of Mockito you are using. For example, PowerMock version 1.7.0 RC2 is compatible with Mockito version 2.1.0[1][5]. Always check the latest documentation for the most current compatibility information.

2. Use the Correct PowerMock API Extension**

When using Mockito 2.x, you need to use the `powermock-api-mockito2` extension instead of the older `powermock-api-mockito`. This is crucial because the older extension does not work with Mockito 2.x and can cause errors like `java.lang.NoClassDefFoundError: org/mockito/cglib/proxy/MethodInterceptor`[5][8].

3. Configure Annotations**

To use PowerMock with Mockito, your test class must be annotated with `@RunWith(PowerMockRunner.class)`. Additionally, you need to specify the classes that you want to prepare for testing using `@PrepareForTest`. This annotation is necessary for mocking static methods or classes.

java
import org.junit.runner.RunWith;
import org.powermock.core.classloader.annotations.PrepareForTest;
import org.powermock.modules.junit4.PowerMockRunner;

@RunWith(PowerMockRunner.class)
@PrepareForTest({YourStaticClass.class, AnotherClass.class})
public class YourTestClass {
    // Your test methods here
}

4. Mocking Static Methods**

To mock static methods, use `PowerMockito.mockStatic(YourStaticClass.class)`. This allows you to control the behavior of static methods during your tests.

java
import org.powermock.api.mockito.PowerMockito;

PowerMockito.mockStatic(YourStaticClass.class);
when(YourStaticClass.yourStaticMethod()).thenReturn("Mocked Value");

5. Handling Final Classes/Methods**

As of Mockito 2.1.0, you can mock final classes and methods using Mockito's `mock-maker-inline` feature. However, when using PowerMock, you might need to configure it to delegate to Mockito's `mock-maker-inline` if you want to use this feature. This can be done by setting up a configuration file (`org/powermock/extensions/configuration.properties`) with the following content:

mockito.mock-maker-class=mock-maker-inline

6. Avoid Incompatibilities**

Ensure that there are no conflicts between different `MockMaker` implementations. If you have both PowerMock and Mockito's `mock-maker-inline` in your classpath, it might lead to unpredictable behavior. PowerMock can delegate calls to another `MockMaker`, which helps in such scenarios[1].

By following these steps, you can effectively configure PowerMock to work with Mockito 2, enabling you to leverage the strengths of both frameworks in your unit tests.