How do I mock a static method in final class - unit-testing

Question

I have some code that has a static method inside a final class. I was trying to mock that method. I have tried doing a few things..
public final Class Class1{
public static void doSomething(){
}
}
How can I mock doSomething()? I have tried..
Class1 c1=PowerMockito.mock(Class1.class)
PowerMockito.mockSatic(Class1.class);
Mockito.doNothing().when(c1).doSomething();
This gives me an error:
org.mockito.exceptions.misusing.UnfinishedStubbingException:
Unfinished stubbing detected here:
-> at com.cerner.devcenter.wag.textHandler.AssessmentFactory_Test.testGetGradeReport_HTMLAssessment(AssessmentFactory_Test.java:63)
E.g. thenReturn() may be missing.
Examples of correct stubbing:
when(mock.isOk()).thenReturn(true);
when(mock.isOk()).thenThrow(exception);
doThrow(exception).when(mock).someVoidMethod();
Hints:
1. missing thenReturn()
2. you are trying to stub a final method, you naughty developer!
at org.powermock.api.mockito.internal.invocation.MockitoMethodInvocationControl.performIntercept(MockitoMethodInvocationControl.java:260)

Answer 1

Most used testing framework is JUnit 4. So if you are using it you need to annotate test class with:
#RunWith( PowerMockRunner.class )
#PrepareForTest( Class1.class )
Than
PowerMockito.mockSatic(Class1.class);
Mockito.doNothing().when(c1).doSomething();
Mockito.when(Class1.doSomething()).thenReturn(fakedValue);
// call of static method is required to mock it
PowerMockito.doNothing().when(Class1.class);
Class1.doSomething();

Answer 2

I use PowerMock. It let's you do things Mockito can't do.
https://github.com/powermock/powermock/wiki
#RunWith(PowerMockRunner.class)
#PrepareForTest(StaticClass.class)
public class StaticTest {
#Before
public void setUp() {
PowerMockito.mockStatic(Bukkit.class);
//When a static method with no arguments is called.
when(StaticClass.callMethod1()).thenReturn(value);
//When a static method with an argument is called.
when(StaticClass.callMethod2(argument)).thenReturn(value2);
//Use when you don't care what the argument is..
//use Mockito.anyInt(), Mockito.anyDouble(), etc.
when(StaticClass.callMethod3(Mockito.anyString())).thenReturn(value3);
}
#Test
public void VerifyStaticMethodsWork() {
assertEquals(value, StaticClass.callMethod1());
assertEquals(value2, StaticClass.callMethod2(argument));
assertEquals(value3, StaticClass.callMethod3("Hello"));
}
}