PHP 8.1.0(php.net)

    @Test
    public void testSomeMethod_FromStatic() {
        StaticWrapper1 staticWrapper = new StaticWrapper1();
        int mockInput = 1;
        RegularClass rc = new RegularClass();
        int expected = 2;

        int ret = staticWrapper.someStaticClass.someMethod(rc, mockInput);

        verify(staticWrapper.someStaticClass, times(1)).someMethod(rc, mockInput);
        assertEquals(expected, ret);
    }


    public class StaticWrapper1 {
        static class StaticClass {
            public int someMethod(RegularClass foo, int val){
                return foo.someAddMethod(val);
                /* it's not practical to chain, eg
                   staticWrapper2.someAddMethod(foo, val);
                   because you end up with circular dependencies or passing large numbers of deps around, which you can't verify in tests anyway */
            }
        }
    }