lnwire: add benchmark for Warning

lnwire/message_test.go

@@ -259,6 +259,7 @@ func BenchmarkReadMessage(b *testing.B) {
 func makeAllMessages(t testing.TB, r *rand.Rand) []lnwire.Message {
 	msgAll := []lnwire.Message{}
 
+	msgAll = append(msgAll, newMsgWarning(t, r))
 	msgAll = append(msgAll, newMsgInit(t, r))
 	msgAll = append(msgAll, newMsgError(t, r))
 	msgAll = append(msgAll, newMsgPing(t, r))
@@ -293,6 +294,19 @@ func makeAllMessages(t testing.TB, r *rand.Rand) []lnwire.Message {
 	return msgAll
 }
 
+func newMsgWarning(tb testing.TB, r io.Reader) *lnwire.Warning {
+	tb.Helper()
+
+	msg := lnwire.NewWarning()
+
+	_, err := r.Read(msg.ChanID[:])
+	require.NoError(tb, err, "unable to generate chan id")
+
+	msg.Data = createExtraData(tb, r)
+
+	return msg
+}
+
 func newMsgInit(t testing.TB, r io.Reader) *lnwire.Init {
 	t.Helper()