codec/mjpeg: added jpeg_test.go, tests.go and expected output, expect.mjpeg to test ParsePayload function in jpeg.go

codec/mjpeg/jpeg_test.go

@@ -0,0 +1,69 @@
+/*
+DESCRIPTION
+  jpeg_test.go provides testing for utilities found in jpeg.go.
+
+AUTHOR
+  Saxon Nelson-Milton <saxon@ausocean.org>
+
+LICENSE
+  Copyright (C) 2020 the Australian Ocean Lab (AusOcean)
+
+  It is free software: you can redistribute it and/or modify them
+  under the terms of the GNU General Public License as published by the
+  Free Software Foundation, either version 3 of the License, or (at your
+  option) any later version.
+
+  It is distributed in the hope that it will be useful, but WITHOUT
+  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+  FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+  for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with revid in gpl.txt. If not, see http://www.gnu.org/licenses.
+*/
+
+package mjpeg
+
+import (
+	"bytes"
+	"io/ioutil"
+	"testing"
+
+	"bitbucket.org/ausocean/av/protocol/rtp"
+)
+
+func TestParsePayload(t *testing.T) {
+	const (
+		wantPath = "testdata/expect.mjpeg"
+		noOfPkts = 5629
+	)
+
+	got := &bytes.Buffer{}
+	c := NewContext(got)
+
+	for i, pkt := range testPackets {
+		p, err := rtp.Payload(pkt)
+		if err != nil {
+			t.Fatalf("could not get payload for packet %d: %v", i, err)
+		}
+
+		m, err := rtp.Marker(pkt)
+		if err != nil {
+			t.Fatalf("could not get marker for packet %d: %v", i, err)
+		}
+
+		err = c.ParsePayload(p, m)
+		if err != nil {
+			t.Fatalf("could not parse pyload for packet %d: %v", i, err)
+		}
+	}
+
+	want, err := ioutil.ReadFile(wantPath)
+	if err != nil {
+		t.Fatalf("could not read file for wanted MJPEG data: %v", err)
+	}
+
+	if !bytes.Equal(got.Bytes(), want) {
+		t.Error("did not get expected result")
+	}
+}