public void ReadHexTest(string hexStr)
{
byte[] bytes = "7E0000000000000000000000ABCDEF12347E".ToHexBytes();
JT808MessagePackReader jT808MessagePackReader = new JT808MessagePackReader(bytes);
Assert.Equal(JT808Package.BeginFlag, jT808MessagePackReader.ReadStart());
//0000000000000000000000ABCDEF1234
Assert.Equal(hexStr, jT808MessagePackReader.ReadHex(16));
Assert.Equal(JT808Package.EndFlag, jT808MessagePackReader.ReadEnd());
}