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Test Info:
<!DOCTYPE HTML>
<html>
<head>
<title>Autoplay policy test : do not resume AudioContext which is suspended by page</title>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
<script type="text/javascript" src="manifest.js"></script>
</head>
<body>
<script>
/* import-globals-from ../../../test/manifest.js */
/**
* This test is used to ensure we won't resume AudioContext which is suspended
* by page (it means calling suspend() explicitly) when calling
* `AudioScheduledSourceNode.start()`.
*/
SimpleTest.waitForExplicitFinish();
(async function testNotResumeUserInvokedSuspendedAudioContext() {
await setupTestPreferences();
const nodeTypes = ["AudioBufferSourceNode", "ConstantSourceNode", "OscillatorNode"];
for (let nodeType of nodeTypes) {
info(`- create an audio context which should not be allowed to start, it's allowed to be created, but it's forbidden to start -`);
await createAudioContext();
info(`- explicitly suspend the AudioContext in the page -`);
suspendAudioContext();
info(`- start an 'AudioScheduledSourceNode', and check that the AudioContext does not start, because it has been explicitly suspended -`);
await createAndStartAudioScheduledSourceNode(nodeType);
}
SimpleTest.finish();
})();
/**
* Test utility functions
*/
function setupTestPreferences() {
return SpecialPowers.pushPrefEnv({"set": [
["media.autoplay.default", SpecialPowers.Ci.nsIAutoplay.BLOCKED],
["media.autoplay.blocking_policy", 0],
["media.autoplay.block-event.enabled", true],
]});
}
async function createAudioContext() {
/* global ac */
window.ac = new AudioContext();
await once(ac, "blocked");
is(ac.state, "suspended", `AudioContext is blocked.`);
}
function suspendAudioContext() {
try {
ac.suspend();
} catch(e) {
ok(false, `AudioContext suspend failed!`);
}
}
async function createAndStartAudioScheduledSourceNode(nodeType) {
let node;
info(`- create ${nodeType} -`);
switch (nodeType) {
case "AudioBufferSourceNode":
node = ac.createBufferSource();
break;
case "ConstantSourceNode":
node = ac.createConstantSource();
break;
case "OscillatorNode":
node = ac.createOscillator();
break;
default:
ok(false, "undefined AudioScheduledSourceNode type");
return;
}
node.connect(ac.destination);
// activate the document in order to allow autoplay.
SpecialPowers.wrap(document).notifyUserGestureActivation();
node.start();
await once(ac, "blocked");
is(ac.state, "suspended", `AudioContext should not be resumed.`);
// reset the activation flag of the document in order not to interfere next test.
SpecialPowers.wrap(document).clearUserGestureActivation();
}
</script>