* Tests the {@link PacUnicodeString#check(String)} method with an empty string.
     *
     * @throws PACDecodingException if the check fails, which is not expected in this test.
     */
    @Test
    void testCheck_withEmptyString() throws PACDecodingException {
        // Length is 0, so an empty string is expected
        PacUnicodeString pacString = new PacUnicodeString((short) 0, (short) 10, 100);
        String testString = "";