func (t *WriteTransport) sendAckPacket() {
fmt.Printf("sending ack packet (blocknum = %d) back to client with addr %v\n", t.blocknum, t.clientAddr)
ackPacket := packet.NewAckPacket(t.blocknum)
_, err := t.conn.WriteToUDP(ackPacket.ToBytes(), t.clientAddr)
CheckError(err)
t.blocknum = t.blocknum + uint16(1)
fmt.Println("just increased t.blocknum to be", t.blocknum)
}
func TestBytesToDataPacket(t *testing.T) {
for i, test := range testDataPacket {
ret := packet.ToPacket(test.bitVersion)
if !reflect.DeepEqual(ret, test.packetVersion) {
t.Errorf("Failed Test %d: DataPacket: toPacket(%v)=%v DESIRED: %v", i, test.bitVersion, ret, test.packetVersion)
}
}
}
//test AckPacket conversion to bytes
var testAckPacket = []struct {
packetVersion packet.AckPacket
bitVersion []byte
err bool
}{
{packet.NewAckPacket(uint16(0)), stringToBytes("\x00" + string(packet.ACK) + "\x00\x00"), false}, //0
{packet.NewAckPacket(uint16(1)), stringToBytes("\x00" + string(packet.ACK) + "\x00\x01"), false}, //1
{packet.NewAckPacket(uint16(12289)), stringToBytes("\x00" + string(packet.ACK) + "\x30\x01"), false}, //order of blocknum bytes is big endian
{packet.NewAckPacket(uint16(0xffff)), stringToBytes("\x00" + string(packet.ACK) + "\xff\xff"), false}, //max blocknum
}
func TestAckPacketToBytes(t *testing.T) {
for i, test := range testAckPacket {
ret := test.packetVersion.ToBytes()
same := true
same = len(test.bitVersion) == len(ret)
for j, b := range test.bitVersion {
if ret[j] != b {
same = false
}