add tests

test/sync-controller.test.js

@@ -66,6 +66,58 @@ QUnit.test('returns correct sync point for ProgramDateTime strategy', function(a
   }, 'syncpoint found for ProgramDateTime set');
 });
 
+QUnit.test('ProgramDateTime strategy finds nearest segment for sync', function(assert) {
+  let strategy = getStrategy('ProgramDateTime');
+  let playlist = playlistWithDuration(40);
+  let timeline = 0;
+  let duration = Infinity;
+  let syncPoint;
+
+  syncPoint = strategy.run(this.syncController, playlist, duration, timeline, 23);
+
+  assert.equal(syncPoint, null, 'no syncpoint when datetimeToDisplayTime not set');
+
+  playlist.segments.forEach((segment, index) => {
+    segment.dateTimeObject = new Date(2012, 11, 12, 12, 12, 12 + (index * 10));
+  });
+
+  this.syncController.setDateTimeMapping(playlist);
+
+  let newPlaylist = playlistWithDuration(40);
+
+  syncPoint = strategy.run(this.syncController, newPlaylist, duration, timeline);
+
+  assert.equal(syncPoint, null, 'no syncpoint when datetimeObject not set on playlist');
+
+  newPlaylist.segments.forEach((segment, index) => {
+    segment.dateTimeObject = new Date(2012, 11, 12, 12, 12, 22 + (index * 10));
+  });
+
+  syncPoint = strategy.run(this.syncController, newPlaylist, duration, timeline, 23);
+
+  assert.deepEqual(syncPoint, {
+    time: 20,
+    segmentIndex: 1
+  }, 'syncpoint found for ProgramDateTime set');
+});
+
+QUnit.test('Does not set date time mapping if date time info not on first segment',
+function(assert) {
+  let playlist = playlistWithDuration(40);
+
+  playlist.segments[1].dateTimeObject = new Date(2012, 11, 12, 12, 12, 12);
+
+  this.syncController.setDateTimeMapping(playlist);
+
+  assert.notOk(this.syncController.datetimeToDisplayTime, 'did not set datetime mapping');
+
+  playlist.segments[0].dateTimeObject = new Date(2012, 11, 12, 12, 12, 2);
+
+  this.syncController.setDateTimeMapping(playlist);
+
+  assert.ok(this.syncController.datetimeToDisplayTime, 'did set date time mapping');
+});
+
 QUnit.test('returns correct sync point for Segment strategy', function(assert) {
   let strategy = getStrategy('Segment');
   let playlist = {