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<!--
Mozilla Bug:
https://bugzilla.mozilla.org/show_bug.cgi?id=1369309
Tor Ticket:
https://trac.torproject.org/projects/tor/ticket/15757
-->
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  <meta charset="utf-8">
  <title>Test for Bug 1369309</title>
  <script src="/tests/SimpleTest/SimpleTest.js"></script>
  <script type="application/javascript" src="manifest.js"></script>
  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
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<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=682299">Mozilla Bug 1369309</a>
<a target="_blank" href="https://trac.torproject.org/projects/tor/ticket/15757">Tor Ticket 15757</a>

<!-- The main testing script -->
<script class="testbody" type="text/javascript">
  var manager = new MediaTestManager;
  const SPOOFED_FRAMES_PER_SECOND = 30;
  const SPOOFED_DROPPED_RATIO = 0.05;
  const MS_PER_TIME_ATOM = 100; // Not the default anymore, but what we test here.
  // Push the setting of 'privacy.resistFingerprinting' into gTestPrefs, which
  // will be set during MediaTestManager.runTests().
  gTestPrefs.push(
    ["privacy.resistFingerprinting", true],
    ["privacy.resistFingerprinting.reduceTimerPrecision.microseconds", MS_PER_TIME_ATOM * 1000],
    ["privacy.resistFingerprinting.reduceTimerPrecision.jitter", false],
    // We use 240p as the target resolution since 480p is greater than every video
    // source in our test suite, so we need to use 240p here for allowing us to
    // test dropped rate here.
    ["privacy.resistFingerprinting.target_video_res", 240]
  );
  var testCases = [
    { name:"320x240.ogv", type:"video/ogg", width:320, height:240, duration:0.266, drop: false },
    { name:"seek.webm", type:"video/webm", width:320, height:240, duration:3.966, drop: false },
    { name:"gizmo.mp4", type:"video/mp4", width:560, height:320, duration:5.56, drop: true }
  ];

  function checkStats(v, shouldDrop) {
    // Rounding the current time to 100ms.
    const secondsPerAtom = MS_PER_TIME_ATOM / 1000;
    const currentTimeAtoms = Math.floor(v.currentTime / secondsPerAtom);
    const currentTime = currentTimeAtoms * secondsPerAtom;
    let dropRate = 0;

    if (shouldDrop) {
      dropRate = SPOOFED_DROPPED_RATIO;
    }

    is(v.mozParsedFrames, parseInt(currentTime * SPOOFED_FRAMES_PER_SECOND, 10),
        "mozParsedFrames should be spoofed if fingerprinting resistance is enabled");
    is(v.mozDecodedFrames, parseInt(currentTime * SPOOFED_FRAMES_PER_SECOND, 10),
        "mozDecodedFrames should be spoofed if fingerprinting resistance is enabled");
    is(v.mozPresentedFrames,
        parseInt(currentTime * SPOOFED_FRAMES_PER_SECOND * (1 - dropRate), 10),
        "mozPresentedFrames should be spoofed if fingerprinting resistance is enabled");
    is(v.mozPaintedFrames,
        parseInt(currentTime * SPOOFED_FRAMES_PER_SECOND * (1 - dropRate), 10),
        "mozPaintedFrames should be spoofed if fingerprinting resistance is enabled");
    is(v.mozFrameDelay, 0.0,
        "mozFrameDelay should be 0.0 if fingerprinting resistance is enabled");
    let playbackQuality = v.getVideoPlaybackQuality();
    is(playbackQuality.totalVideoFrames, parseInt(currentTime * SPOOFED_FRAMES_PER_SECOND, 10),
        "VideoPlaybackQuality.totalVideoFrames should be spoofed if fingerprinting resistance is enabled");
    is(playbackQuality.droppedVideoFrames, parseInt(currentTime * SPOOFED_FRAMES_PER_SECOND * dropRate, 10),
        "VideoPlaybackQuality.droppedVideoFrames should be spoofed if fingerprinting resistance is enabled");
  }

  function startTest(test, token) {
    let v = document.createElement("video");
    v.token = token;
    v.src = test.name;
    manager.started(token);
    once(v, "ended", () => {
      checkStats(v, test.drop);
      removeNodeAndSource(v);
      manager.finished(v.token);
    });
    v.play();
  }

  manager.runTests(testCases, startTest);

</script>
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