s(cues.getCueById("1").startTime, 0);
        assert_equals(cues[1].startTime, 31);
        assert_equals(cues[2].startTime, 61);
        assert_equals(cues.getCueById("4").startTime, 121);
        assert_equals(cues.getCueById("junk"), null);

        // Create a new cue, check values.
        var textCue = new VTTCue(33, 3.4, "Sausage?");
        assert_equals(textCue.track, null);
        assert_equals(textCue.id, "");
        assert_equals(textCue.startTime, 33);
        assert_equals(textCue.endTime, 3