Mock Static Methods in JUnit5 using PowerMockito

With mockito v 3.4.0 we can simply use mockStatic() method without powermock library :

 try (MockedStatic mocked = mockStatic(Foo.class)) {
   mocked.when(Foo::method).thenReturn("bar");
   assertEquals("bar", Foo.method());
   mocked.verify(Foo::method);
 }

assertEquals("foo", Foo.method());

Latest documentation and example :
https://javadoc.io/static/org.mockito/mockito-core/3.5.10/org/mockito/Mockito.html#static_mocks

You’re using @Before which is junit4 annotation.. Junit5 have @BeforeEach / @BeforeAll(whichever suits your requirement). Also, your import for @Test are from junit4 but not from junit5(That should be org.junit.jupiter.api.Test;)

As your link suggests, still you can’t do power mock stuff with junit-5 directly, simply because there’s no PowerMockRunner (Extension) still available for junit-5.

However, In your above code possibly what has gone wrong is this line.

when(EnvironmentUtils.isCF()).thenReturn(true);

Here, note that you are using when of mockito (by import static org.mockito.Mockito.*;)

Instead, you have to use the one of PowerMockito. So

Remove this line import static org.mockito.Mockito.*;

Instead, add this. import static org.powermock.api.mockito.PowerMockito.*;