dom/media/webaudio/test/test_slowStart.html
author Ting-Yu Lin <tlin@mozilla.com>
Sat, 01 Apr 2023 04:17:05 +0000
changeset 658805 7437637d0b5c2745440bfeba4adb64689d24044f
parent 618698 7c8fd3cc3cd02211d4405ae436c9a4c9f63766ef
permissions -rw-r--r--
Bug 1055894 - Add GetLogicalNormalRect() and adapt some callers of GetNormalRect(). r=emilio This patch makes the API nicer, and shouldn't change the behavior. Differential Revision: https://phabricator.services.mozilla.com/D174344

<!DOCTYPE HTML>
<html>
<head>
  <title>Test AudioContext.currentTime</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();
SimpleTest.requestFlakyTimeout("This test needs to periodically query the AudioContext's position.");
const CUBEB_INIT_DELAY = 5000;
// Delay audio stream start by a good 5 seconds
SpecialPowers.pushPrefEnv({"set": [["media.cubeb.slow_stream_init_ms",
    CUBEB_INIT_DELAY]]}, runTest);


function runTest() {
  let ac = new AudioContext();
  let notStartedYetCount = 0;
  let startWallClockTime = performance.now();
  is(ac.currentTime, 0, "AudioContext.currentTime should be 0 initially");
  is(ac.state, "suspended", "AudioContext.currentTime is initially suspended");
  let intervalHandle = setInterval(function() {
    if (ac.state == "running" || ac.currentTime > 0) {
      clearInterval(intervalHandle);
      return;
    }
    is(ac.currentTime, 0, "AudioContext.currentTime is still 0");
    is(ac.state, "suspended", "AudioContext.currentTime is still suspended");
    notStartedYetCount++;
  });
  ac.onstatechange = function() {
    is(ac.state, "running", "The AudioContext eventually started.");
    var startDuration = performance.now() - startWallClockTime;
    info(`AudioContext start time with a delay of ${CUBEB_INIT_DELAY}): ${startDuration}`);
    ok(notStartedYetCount > 0, "We should have observed the AudioContext in \"suspended\" state");
    ok(startDuration >= CUBEB_INIT_DELAY, "The AudioContext state transition was correct.");
    SimpleTest.finish();
  }
}

</script>
</pre>
</body>
</html>