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