* Tests the {@link PacUnicodeString#check(String)} method with a non-empty string when the pointer is zero.
     * This is an invalid state and should throw an exception.
     */
    @Test
    void testCheck_withNonNullStringAndZeroPointer_throwsException() {
        // A zero pointer should mean the string is null
        PacUnicodeString pacString = new PacUnicodeString((short) 0, (short) 0, 0);
        String testString = "not-null";