add test for MPD@Location

Author: mjneil

mpd/fixtures/location.mpd

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<MPD xmlns="urn:mpeg:dash:schema:mpd:2011" profiles="urn:mpeg:dash:profile:isoff-live:2011" type="dynamic" availabilityStartTime="1970-01-01T00:00:00Z" minimumUpdatePeriod="PT5S" publishTime="1970-01-01T00:00:00Z">
+  <Location>https://example.com/location.mpd</Location>
+</MPD>

mpd/mpd_test.go

@@ -4,8 +4,10 @@ import (
 	"encoding/base64"
 	"testing"
 
+	"github.com/zencoder/go-dash/helpers/ptrs"
 	. "github.com/zencoder/go-dash/helpers/ptrs"
 	"github.com/zencoder/go-dash/helpers/require"
+	"github.com/zencoder/go-dash/helpers/testfixtures"
 )
 
 const (
@@ -41,6 +43,7 @@ const (
 	VALID_SUBTITLE_ID                 string = "subtitle_en"
 	VALID_SUBTITLE_URL                string = "http://example.com/content/sintel/subtitles/subtitles_en.vtt"
 	VALID_ROLE                        string = "main"
+	VALID_LOCATION                    string = "https://example.com/location.mpd"
 )
 
 func TestNewMPDLive(t *testing.T) {
@@ -484,3 +487,30 @@ func TestAddNewAccessibilityElement(t *testing.T) {
 	require.EqualStringPtr(t, Strptr((string)(ACCESSIBILITY_ELEMENT_SCHEME_DESCRIPTIVE_AUDIO)), elem.SchemeIdUri)
 	require.EqualStringPtr(t, Strptr("1"), elem.Value)
 }
+
+func TestLocationWriteToString(t *testing.T) {
+	m := &MPD{
+		XMLNs:                 ptrs.Strptr("urn:mpeg:dash:schema:mpd:2011"),
+		Profiles:              ptrs.Strptr((string)(DASH_PROFILE_LIVE)),
+		Type:                  ptrs.Strptr("dynamic"),
+		AvailabilityStartTime: ptrs.Strptr(VALID_AVAILABILITY_START_TIME),
+		MinimumUpdatePeriod:   ptrs.Strptr(VALID_MINIMUM_UPDATE_PERIOD),
+		PublishTime:           ptrs.Strptr(VALID_AVAILABILITY_START_TIME),
+		Location:              VALID_LOCATION,
+	}
+
+	got, err := m.WriteToString()
+	require.NoError(t, err)
+
+	testfixtures.CompareFixture(t, "fixtures/location.mpd", got)
+}
+
+func TestReadLocation(t *testing.T) {
+	m, err := ReadFromFile("fixtures/location.mpd")
+	require.NoError(t, err)
+
+	got, err := m.WriteToString()
+	require.NoError(t, err)
+
+	testfixtures.CompareFixture(t, "fixtures/location.mpd", got)
+}