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serverTCP_test.go
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serverTCP_test.go
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package coap
import (
"net"
"testing"
)
func startTCPLisenter(t *testing.T) (*net.TCPListener, string) {
tcpAddr, err := net.ResolveTCPAddr("tcp", "127.0.0.1:5683")
if err != nil {
t.Fatal("Can't resolve TCP addr")
}
tcpListener, err := net.ListenTCP("tcp", tcpAddr)
if err != nil {
t.Fatal("Can't listen on TCP: ", err)
}
coapServerAddr := tcpListener.Addr().String()
return tcpListener, coapServerAddr
}
func dialAndSendTCP(t *testing.T, addr string, req Message) Message {
c, err := Dial("tcp", addr)
if err != nil {
t.Log("the addr to dial was: ", addr)
t.Fatalf("Error dialing: %v", err)
}
m, err := c.Send(req)
if err != nil {
t.Fatalf("Error sending request: %v", err)
}
return m
}
func TestServeTCPWithAckResponse(t *testing.T) {
req := &TcpMessage{
MessageBase{
typ: Confirmable,
code: POST,
messageID: 9876,
payload: []byte("Content sent by client"),
},
}
req.SetOption(ContentFormat, TextPlain)
req.SetPathString("/req/path")
res := &TcpMessage{
MessageBase{
typ: Acknowledgement,
code: Content,
messageID: req.MessageID(),
payload: []byte("Reply from CoAP server"),
},
}
res.SetOption(ContentFormat, TextPlain)
res.SetPath(req.Path())
handler := FuncHandler(func(c *Conn, m Message) Message {
t.Log(m.Type(), "payload:", m.Payload())
assertEqualMessages(t, req, m)
return res
})
tcpListener, coapServerAddr := startTCPLisenter(t)
defer tcpListener.Close()
go dialAndTest(t, coapServerAddr, req, true, res)
tcpConn, err := tcpListener.AcceptTCP()
if err != nil {
t.Fatal("err accepting TCPconn: ", err)
}
go Serve(
&Conn{connTCP: tcpConn},
handler,
)
/* m := dialAndSendTCP(t, coapServerAddr, req)
if m == nil {
t.Fatalf("Didn't receive CoAP response")
}
assertEqualMessages(t, res, m)
*/
}
func TestServeTCPWithoutAckResponse(t *testing.T) {
req := &TcpMessage{
MessageBase{
typ: NonConfirmable,
code: POST,
messageID: 54321,
payload: []byte("Content sent by client"),
},
}
req.SetOption(ContentFormat, AppOctets)
handler := FuncHandler(func(c *Conn, m Message) Message {
assertEqualMessages(t, req, m)
return nil
})
tcpListener, coapServerAddr := startTCPLisenter(t)
defer tcpListener.Close()
dialAndTest(t, coapServerAddr, req, false, &TcpMessage{})
tcpConn, err := tcpListener.AcceptTCP()
if err != nil {
t.Fatal("err accepting TCPconn: ", err)
}
go Serve(
&Conn{connTCP: tcpConn},
handler,
)
}
func dialAndTest(t *testing.T, addr string, req *TcpMessage, ack bool, res *TcpMessage) {
m := dialAndSendTCP(t, addr, req)
if ack {
assertEqualMessages(t, res, m)
} else if m != nil {
t.Errorf("recieved an ack when expecting none")
}
}