public void TestMethod1()
{
//bytes are in Network Order
byte[] sampleUdpBytes = { 0x45, 0x00, 0x00, 0x4e, 0x70, 0x3a, 0x00, 0x00, 0x80, 0x11, 0xaa, 0x2a, 0x0a, 0x78, 0x85, 0x4b, 0x0a, 0x78, 0x85, 0xff, 0x00, 0x89, 0x00, 0x89, 0x00, 0x3a, 0x12, 0x55, 0x8a, 0x6a, 0x01, 0x10, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x20, 0x46, 0x48, 0x46, 0x41, 0x45, 0x42, 0x45, 0x45, 0x43, 0x41, 0x43, 0x41, 0x43, 0x41, 0x43, 0x41, 0x43, 0x41, 0x43, 0x41, 0x43, 0x41, 0x43, 0x41, 0x43, 0x41, 0x43, 0x41, 0x43, 0x41, 0x41, 0x41, 0x00, 0x00, 0x20, 0x00, 0x01 };
byte[] sampleIpHeaderBytes = { 0x45, 0x00, 0x00, 0x4e, 0x70, 0x3a, 0x00, 0x00, 0x80, 0x11, 0xaa, 0x2a, 0x0a, 0x78, 0x85, 0x4b, 0x0a, 0x78, 0x85, 0xff };
//byte[] sampleIpHeaderBytesNoCkSum = { 0x45, 0x00, 0x00, 0x4e, 0x70, 0x3a, 0x00, 0x00, 0x80, 0x11, 0x00, 0x00, 0x0a, 0x78, 0x85, 0x4b, 0x0a, 0x78, 0x85, 0xff };
byte[] sampleIpCksumBytes = { 0xaa, 0x2a };
byte[] sampleUdpCksumBytes = { 0x12, 0x55 };
var testDatagram = new UdpDatagram(sampleUdpBytes);
//Preserved the ip checksum correctly in the object
var IpVerify = (ushort)IPAddress.NetworkToHostOrder((short)BitConverter.ToUInt16(sampleIpCksumBytes, 0));
Assert.AreEqual(testDatagram.PacketHeaderChecksum, IpVerify);
//Preserved the udp checksum correctly in the object
var UdpVerify = (ushort)IPAddress.NetworkToHostOrder((short)BitConverter.ToUInt16(sampleUdpCksumBytes, 0));
Assert.AreEqual(testDatagram.UdpCheckSum, UdpVerify);
//Ip header in transform from object to wire-bytes is correct
var IpHeaderVerify = testDatagram.PacketHeaderToWireBytes();
Assert.IsTrue(IpHeaderVerify.SequenceEqual(sampleIpHeaderBytes));
//checksum on header should be zero if header has the correct checksum in it.
var IpHeaderCk = NetworkTransformExtentions.GetInternetChecksum(IpHeaderVerify);
Assert.AreEqual(0, IpHeaderCk);
//Udp check is correct
var UdpCk = (ushort)IPAddress.NetworkToHostOrder((short)testDatagram.GetUdpCheckSum());
Assert.AreEqual(UdpVerify, UdpCk);
//the whole datagram is right
var datagramCheck = testDatagram.ToWirebytes();
Assert.IsTrue(datagramCheck.SequenceEqual(sampleUdpBytes));
}
