container/mts: added mpegts_test.go and first test TestBytes.

container/mts/mpegts_test.go

@@ -0,0 +1,96 @@
+/*
+NAME
+  mpegts_test.go
+
+DESCRIPTION
+  mpegts_test.go contains testing for functionality found in mpegts.go.
+
+AUTHORS
+  Saxon A. Nelson-Milton <saxon@ausocean.org>
+
+LICENSE
+  Copyright (C) 2019 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
+  in gpl.txt.  If not, see http://www.gnu.org/licenses.
+*/
+
+package mts
+
+import (
+	"bytes"
+	"testing"
+)
+
+func TestBytes(t *testing.T) {
+	tests := []struct {
+		packet         Packet
+		payloadLen     int
+		stuffingLen    int
+		expectedHeader []byte
+	}{
+		{
+			packet: Packet{
+				PUSI: true,
+				PID:  1,
+				RAI:  true,
+				CC:   4,
+				AFC:  HasPayload | HasAdaptationField,
+				PCRF: true,
+				PCR:  1,
+			},
+			payloadLen:  120,
+			stuffingLen: 56,
+			expectedHeader: []byte{
+				0x47,                               // Sync byte.
+				0x40,                               // TEI=0, PUSI=1, TP=0, PID=00000.
+				0x01,                               // PID(Cont)=00000001.
+				0x34,                               // TSC=00, AFC=11(adaptation followed by payload), CC=0100(4).
+				0x3f,                               // AFL=.
+				0x50,                               // DI=0,RAI=1,ESPI=0,PCRF=1,OPCRF=0,SPF=0,TPDF=0, AFEF=0.
+				0x00, 0x00, 0x00, 0x00, 0x80, 0x00, // PCR.
+			},
+		},
+	}
+
+	for testNum, test := range tests {
+		// Construct payload.
+		const payloadChar = 0x11
+		payload := make([]byte, 0, test.payloadLen)
+		for i := 0; i < test.payloadLen; i++ {
+			payload = append(payload, payloadChar)
+		}
+
+		// Fill the packet payload.
+		test.packet.FillPayload(payload)
+
+		// Create packet data and copy in expected header.
+		expected := make([]byte, len(test.expectedHeader), PacketSize)
+		copy(expected, test.expectedHeader)
+
+		// Append stuffing.
+		const stuffingChar = 0xff
+		for i := 0; i < test.stuffingLen; i++ {
+			expected = append(expected, stuffingChar)
+		}
+
+		// Copy in payload.
+		expected = append(expected, payload...)
+
+		// Compare got with expected.
+		got := test.packet.Bytes(nil)
+		if !bytes.Equal(got, expected) {
+			t.Errorf("did not get expected result for test: %v.\n Got: %v\n Want: %v\n", testNum, got, expected)
+		}
+	}
+}