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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>