test_VideoPlaybackQuality.html

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<!DOCTYPE HTML>

<html>

<head>

  <title>Test basic functionality of VideoPlaybackQuality</title>

  <script src="/tests/SimpleTest/SimpleTest.js"></script>

  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />

</head>

<body>

<pre id="test">

<script class="testbody" type="text/javascript">

SimpleTest.waitForExplicitFinish();

function test() {

  var video = document.createElement("video");

  ok(video.getVideoPlaybackQuality, "getVideoPlaybackQuality should be exposed with pref set");

  var vpq = video.getVideoPlaybackQuality();

  ok(vpq, "getVideoPlaybackQuality should return an object");

  ok(vpq.creationTime <= performance.now(), "creationTime should be in the past");

  is(vpq.totalVideoFrames, 0, "totalVideoFrames should be 0");

  is(vpq.droppedVideoFrames, 0, "droppedVideoFrames should be 0");

  var vpq2 = video.getVideoPlaybackQuality();

  ok(vpq !== vpq2, "getVideoPlaybackQuality should return a new object");

  ok(vpq.creationTime <= vpq2.creationTime, "VideoPlaybackQuality objects should have increasing creationTime");

  var audio = document.createElement("audio");

  ok(!audio.getVideoPlaybackQuality, "getVideoPlaybackQuality should not be available on Audio elements");

  video.src = "seek.webm";

  video.play();

  video.addEventListener("ended", function () {

    vpq = video.getVideoPlaybackQuality();

    ok(vpq.creationTime <= performance.now(), "creationTime should be in the past");

    ok(vpq.totalVideoFrames > 0, "totalVideoFrames should be > 0");

    ok(vpq.droppedVideoFrames >= 0, "droppedVideoFrames should be >= 0");

    ok(vpq.droppedVideoFrames <= vpq.totalVideoFrames, "droppedVideoFrames should be <= totalVideoFrames");

    SpecialPowers.pushPrefEnv({"set": [["media.video_stats.enabled", false]]}, function () {

      vpq = video.getVideoPlaybackQuality();

      is(vpq.creationTime, 0, "creationTime should be 0");

      is(vpq.totalVideoFrames, 0, "totalVideoFrames should be 0");

      is(vpq.droppedVideoFrames, 0, "droppedVideoFrames should be 0");

      SimpleTest.finish();

});

});

addLoadEvent(function() {

  SpecialPowers.pushPrefEnv({"set":

      ["media.mediasource.enabled", true],

  }, test);

});

</script>

</pre>

</body>

</html>