48 lines
1.7 KiB
HTML
48 lines
1.7 KiB
HTML
<!DOCTYPE HTML>
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<html>
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<head>
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<title>Test AudioContext.currentTime</title>
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<script src="/tests/SimpleTest/SimpleTest.js"></script>
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<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
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</head>
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<body>
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<pre id="test">
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<script class="testbody" type="text/javascript">
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SimpleTest.waitForExplicitFinish();
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SimpleTest.requestFlakyTimeout("This test needs to periodically query the AudioContext's position.");
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const CUBEB_INIT_DELAY = 5000;
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// Delay audio stream start by a good 5 seconds
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SpecialPowers.pushPrefEnv({"set": [["media.cubeb.slow_stream_init_ms",
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CUBEB_INIT_DELAY]]}, runTest);
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function runTest() {
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let ac = new AudioContext();
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let notStartedYetCount = 0;
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let startWallClockTime = performance.now();
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is(ac.currentTime, 0, "AudioContext.currentTime should be 0 initially");
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is(ac.state, "suspended", "AudioContext.currentTime is initially suspended");
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let intervalHandle = setInterval(function() {
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if (ac.state == "running" || ac.currentTime > 0) {
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clearInterval(intervalHandle);
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return;
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}
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is(ac.currentTime, 0, "AudioContext.currentTime is still 0");
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is(ac.state, "suspended", "AudioContext.currentTime is still suspended");
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notStartedYetCount++;
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});
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ac.onstatechange = function() {
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is(ac.state, "running", "The AudioContext eventually started.");
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var startDuration = performance.now() - startWallClockTime;
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info(`AudioContext start time with a delay of ${CUBEB_INIT_DELAY}): ${startDuration}`);
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ok(notStartedYetCount > 0, "We should have observed the AudioContext in \"suspended\" state");
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ok(startDuration >= CUBEB_INIT_DELAY, "The AudioContext state transition was correct.");
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SimpleTest.finish();
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}
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}
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</script>
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</pre>
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</body>
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</html>
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