new KerberosPacAuthData(emptyToken, keys);
        });
        assertTrue(e.getMessage().contains("PAC"));
    }

    // Test exception for short PAC
    @Test
    void testConstructorShortPac() {
        byte[] shortToken = new byte[7];
        PACDecodingException e = assertThrows(PACDecodingException.class, () -> {
            new KerberosPacAuthData(shortToken, keys);
        });