Add test for RTP round-tripping.

rtp/rtp_test.go

@@ -0,0 +1,30 @@
+package rtp_test
+
+import (
+	"reflect"
+	"testing"
+
+	"github.com/jart/gosip/rtp"
+)
+
+func TestRTPRoundTrip(t *testing.T) {
+	h := rtp.Header{
+		Pad:  false,
+		Mark: true,
+		PT:   42,
+		Seq:  1234,
+		TS:   567891234,
+		Ssrc: 6789,
+	}
+
+	b := h.Write(nil)
+	var h2 rtp.Header
+	err := h2.Read(b)
+	if err != nil {
+		t.Fatalf("Read RTP: %v", err)
+	}
+
+	if !reflect.DeepEqual(h, h2) {
+		t.Errorf("%#v != %#v", h2, h)
+	}
+}