@RunWith(PowerMockRunner.class) public class TargetClassTest { } TargetClass mockTarget = PowerMockito.mock(TargetClass.class); PowerMockito.when(mockTarget.method()).thenReturn("mocked result"); PowerMockito.mockStatic(TargetClass.class); PowerMockito.when(TargetClass.staticMethod()).thenReturn("mocked result"); @Test public void testMethod() { assertEquals("mocked result", mockTarget.method()); assertEquals("mocked result", TargetClass.staticMethod()); }