public String readStringFix(final int length) {
        byte[] result = new byte[length];
        byteBuf.readBytes(result);
        return new String(result, charset);
    }
@Test
    void assertReadStringFix() {
        assertThat(new MySQLPacketPayload(byteBuf, StandardCharsets.UTF_8).readStringFix(0), is(""));
    }