Handler testHandler = new Handler(null);

            // When
            Method method = Handler.class.getDeclaredMethod("getDefaultPort");

            // Then
            assertTrue(Modifier.isProtected(method.getModifiers()));
            method.setAccessible(true); // Required to invoke protected method
            assertEquals(443, method.invoke(testHandler));
        }

        @Test

            Handler testHandler = new Handler();

            // When
            Method method = Handler.class.getDeclaredMethod("getDefaultPort");

            // Then
            assertTrue(Modifier.isProtected(method.getModifiers()));
            method.setAccessible(true);
            assertEquals(443, method.invoke(testHandler));
        }

        @Test
        @DisplayName("Should maintain inheritance hierarchy")