protocol/rtp: made client_test.go more robust

protocol/rtp/client_test.go

@@ -30,6 +30,7 @@ package rtp
 
 import (
 	"bytes"
+	"fmt"
 	"io"
 	"net"
 	"testing"
@@ -74,33 +75,68 @@ func TestReceive(t *testing.T) {
 		packetsToSend = 20
 	)
 
-	for i, op := range []func([]byte) ([]byte, error){nil, Payload} {
-		t.Logf("running op: %v", i)
-		// Create new client and give current operation we are testing.
-		c, err := NewClient(clientAddr, op, (*dummyLogger)(t).log, 1*time.Millisecond)
-		if err != nil {
-			t.Fatalf("could not create client, failed with error: %v", err)
-		}
-		c.Start()
+	for _, op := range []func([]byte) ([]byte, error){nil, Payload} {
+		testErr := make(chan error)
+		serverErr := make(chan error)
+		done := make(chan struct{})
+		clientReady := make(chan struct{})
+		var c *Client
 
-		// Log any errors from client.
+		// Start routine to read from client.
 		go func() {
-			for {
-				err := <-c.Err()
-				t.Logf("unexpected error from client: %v", err)
+			// Create and start the client.
+			var err error
+			c, err = NewClient(clientAddr, op, (*dummyLogger)(t).log, 1*time.Millisecond)
+			if err != nil {
+				testErr <- fmt.Errorf("could not create client, failed with error: %v\n", err)
 			}
+			c.Start()
+			close(clientReady)
+
+			// Read packets using the client and check them with expected.
+			var packetsReceived int
+			buf := make([]byte, 4096)
+			for packetsReceived != packetsToSend {
+				n, err := c.Read(buf)
+				switch err {
+				case nil:
+				case io.EOF:
+					continue
+				default:
+					testErr <- fmt.Errorf("unexpected error from c.Read: %v\n", err)
+				}
+
+				// Create expected data and apply operation if there is one.
+				expect := (&Pkt{V: rtpVer, Payload: []byte{byte(packetsReceived)}}).Bytes(nil)
+				if op != nil {
+					expect, err = op(expect)
+					if err != nil {
+						testErr <- fmt.Errorf("unexpected error when applying op: %v\n", err)
+					}
+				}
+
+				// Compare.
+				got := buf[:n]
+				if !bytes.Equal(got, expect) {
+					testErr <- fmt.Errorf("did not get expected result. \nGot: %v\n Want: %v\n", got, expect)
+				}
+				packetsReceived++
+			}
+			c.Stop()
+			close(done)
 		}()
 
-		// Start the RTP 'server'.
+		// Start the RTP server.
 		go func() {
+			<-clientReady
 			cAddr, err := net.ResolveUDPAddr("udp", clientAddr)
 			if err != nil {
-				t.Fatalf("could not resolve server address, failed with err: %v", err)
+				serverErr <- fmt.Errorf("could not resolve server address, failed with err: %v\n", err)
 			}
 
 			conn, err := net.DialUDP("udp", nil, cAddr)
 			if err != nil {
-				t.Fatalf("could not dial udp, failed with err: %v", err)
+				serverErr <- fmt.Errorf("could not dial udp, failed with err: %v\n", err)
 			}
 
 			// Send packets to the client.
@@ -108,42 +144,25 @@ func TestReceive(t *testing.T) {
 				p := (&Pkt{V: rtpVer, Payload: []byte{byte(i)}}).Bytes(nil)
 				_, err := conn.Write(p)
 				if err != nil {
-					t.Errorf("could not write packet to conn, failed with err: %v", err)
+					serverErr <- fmt.Errorf("could not write packet to conn, failed with err: %v\n", err)
 				}
 			}
 		}()
 
-		// Read packets using the client and check them with expected.
-		var packetsReceived int
-		buf := make([]byte, 4096)
+		<-clientReady
+	loop:
 		for {
-			if packetsReceived == packetsToSend {
-				break
-			}
-
-			n, err := c.Read(buf)
-			switch err {
-			case nil:
-			case io.EOF:
-				continue
+			select {
+			case err := <-c.Err():
+				t.Log(err)
+			case err := <-testErr:
+				t.Fatal(err)
+			case err := <-serverErr:
+				t.Fatal(err)
+			case <-done:
+				break loop
 			default:
-				t.Fatalf("unexpected error: %v", err)
 			}
-
-			expect := (&Pkt{V: rtpVer, Payload: []byte{byte(packetsReceived)}}).Bytes(nil)
-			if op != nil {
-				expect, err = op(expect)
-				if err != nil {
-					t.Fatalf("unexpected error when applying op: %v", err)
-				}
-			}
-
-			got := buf[:n]
-			if !bytes.Equal(got, expect) {
-				t.Errorf("did not get expected result. \nGot: %v\n Want: %v\n", got, expect)
-			}
-			packetsReceived++
 		}
-		c.Stop()
 	}
 }