// Given: A unicode string with null buffer
            rpc.unicode_string unicodeString = new rpc.unicode_string();
            unicodeString.length = (short) 0;
            unicodeString.maximum_length = (short) 0;
            unicodeString.buffer = null;

            // When: Encoding the unicode string
            unicodeString.encode(mockNdrBuffer);

            // Then: Verify the encoding sequence

            names.names[0].name = new UnicodeString("alice", false);
            names.names[0].sid_index = 0;
            // Second is a domain group
            names.names[1] = new lsarpc.LsarTranslatedName();
            names.names[1].sid_type = (short) jcifs.SID.SID_TYPE_DOM_GRP;
            names.names[1].name = new UnicodeString("Domain Users", false);
            names.names[1].sid_index = 0;

        PacUnicodeString unicodeString = new PacUnicodeString(length, length, 100);

        // Should validate string length
        String result = unicodeString.check(testString);
        assertEquals(testString, result);

        // Should reject wrong length
        assertThrows(PACDecodingException.class, () -> {
            unicodeString.check("WRONGLENGTH");
        });
    }

                final rpc.unicode_string ustr = rpc.domains.domains[resp.sid_index].name;
                out.domainName = new UnicodeString(ustr, false).toString();
                break;
            }

            final UnicodeString ucstr = new UnicodeString(resp.name, false);
            out.acctName = ucstr.toString();
            out.type = resp.sid_type;
            out.origin_server = null;

                final rpc.unicode_string ustr = rpc.domains.domains[sid_index].name;
                sids[si].domainName = new UnicodeString(ustr, false).toString();
                break;
            }

            sids[si].acctName = new UnicodeString(rpc.names.names[si].name, false).toString();
            sids[si].origin_server = null;
            sids[si].origin_auth = null;
        }
    }