f, err := os.CreateTemp("", "")
	if err != nil {
		t.Fatal(err)
	}
	name1 := f.Name()
	defer os.Remove(name1)
	f.WriteString("aaaaaaaaaa")
	f.Close()

	f, err = os.CreateTemp("", "")
	if err != nil {
		t.Fatal(err)
	}
	name2 := f.Name()
	defer os.Remove(name2)
	f.WriteString("bbbbbbbbbb")
	f.Close()

	if err = AppendFile(name1, name2, false); err != nil {
		t.Error(err)
	}

        return 0;
    }


    @Override
    protected int writeBytesWireFormat ( byte[] dst, int dstIndex ) {
        int start = dstIndex;

        dst[ dstIndex++ ] = (byte) 0x04;
        dstIndex += writeString(this.path, dst, dstIndex);

        return dstIndex - start;
    }


    @Override
    protected int readParameterWordsWireFormat ( byte[] buffer, int bufferIndex ) {
        return 0;
    }

}

// Name update clause name
func (update Update) Name() string {
	return "UPDATE"
}

// Build build update clause
func (update Update) Build(builder Builder) {
	if update.Modifier != "" {
		builder.WriteString(update.Modifier)
		builder.WriteByte(' ')
	}

	if update.Table.Name == "" {
		builder.WriteQuoted(currentTable)
	} else {
		builder.WriteQuoted(update.Table)
	}
}

// MergeClause merge update clause

        flags2 = 0;
        errorCode = 0;
        received = false;
        digest = null;
    }
    int writeString( String str, byte[] dst, int dstIndex ) {
        return writeString( str, dst, dstIndex, useUnicode );
    }
    int writeString( String str, byte[] dst, int dstIndex, boolean useUnicode ) {
        int start = dstIndex;

        try {
            if( useUnicode ) {

            }
            else {
                // plain text
                this.password = new byte[ ( pwAuth.getPassword().length() + 1 ) * 2];
                this.passwordLength = writeString(pwAuth.getPassword(), this.password, 0);
            }
        }
        else {
            // no password in tree connect
            this.passwordLength = 1;
        }

            } else {
                // plain text
                password = new byte[(session.auth.password.length() + 1) * 2];
                passwordLength = writeString( session.auth.password, password, 0 );
            }
        } else {
            // no password in tree connect
            passwordLength = 1;
        }

			b.uint32(uint32(h.offset))
		}
		if _, err := w.cw.Write(buf[:]); err != nil {
			return err
		}
		if _, err := io.WriteString(w.cw, h.Name); err != nil {
			return err
		}
		if _, err := w.cw.Write(h.Extra); err != nil {
			return err
		}
		if _, err := io.WriteString(w.cw, h.Comment); err != nil {
			return err
		}
	}
	end := w.cw.count

	records := uint64(len(w.dir))

        dstIndex += 2;
        dst[dstIndex++] = (byte)0x00;
        dst[dstIndex++] = (byte)0x00;
        dst[dstIndex++] = (byte)0x00;
        dst[dstIndex++] = (byte)0x00;
        dstIndex += writeString( path, dst, dstIndex );

        return dstIndex - start;
    }
    int writeDataWireFormat( byte[] dst, int dstIndex ) {
        return 0;
    }

		return r.Filter.Tag.String()
	}
	if len(r.Filter.And.Tags) != 0 {
		var buf bytes.Buffer
		for _, t := range r.Filter.And.Tags {
			if buf.Len() > 0 {
				buf.WriteString("&")
			}
			buf.WriteString(t.String())
		}
		return buf.String()
	}
	return ""
}

// Validate - validates the rule element
func (r Rule) Validate() error {
	if err := r.validateID(); err != nil {

        dstIndex += 2;
        writeInt2( informationLevel, dst, dstIndex );
        dstIndex += 2;
        writeInt4( searchStorageType, dst, dstIndex );
        dstIndex += 4;
        dstIndex += writeString( path + wildcard, dst, dstIndex );

        return dstIndex - start;
    }
    int writeDataWireFormat( byte[] dst, int dstIndex ) {
        return 0;
    }