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Test Info:

<!DOCTYPE HTML>
<html>
<head>
<title></title>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
</head>
<body>
<script>
SimpleTest.waitForExplicitFinish();
const ACTIONS = [
"play",
"pause",
"seekbackward",
"seekforward",
"previoustrack",
"nexttrack",
"skipad",
"seekto",
"stop",
];
(async function testSetActionHandler() {
await setupPreference();
for (const action of ACTIONS) {
info(`Test setActionHandler for '${action}'`);
generateAction(action);
ok(true, "it's ok to do " + action + " without any handler");
let expectedDetails = generateActionDetails(action);
let fired = false;
await setHandlerAndTakeAction(action, details => {
ok(hasSameValue(details, expectedDetails), "get expected details for " + action);
fired = !fired;
clearActionHandler(action);
});
generateAction(action);
ok(fired, "handler of " + action + " is cleared");
}
SimpleTest.finish();
})();
function setupPreference() {
return SpecialPowers.pushPrefEnv({"set": [
["dom.media.mediasession.enabled", true],
]});
}
function generateAction(action) {
let details = generateActionDetails(action);
SpecialPowers.wrap(navigator.mediaSession).notifyHandler(details);
}
function generateActionDetails(action) {
let details = { action };
if (action == "seekbackward" || action == "seekforward") {
details.seekOffset = 3.14159;
} else if (action == "seekto") {
details.seekTime = 1.618;
}
return details;
}
function setHandlerAndTakeAction(action, handler) {
let promise = new Promise(resolve => {
navigator.mediaSession.setActionHandler(action, details => {
handler(details);
resolve();
});
});
generateAction(action);
return promise;
}
function hasSameValue(a, b) {
// The order of the object matters when stringify the object.
return JSON.stringify(a) == JSON.stringify(b);
}
function clearActionHandler(action) {
navigator.mediaSession.setActionHandler(action, null);
}
</script>
</body>
</html>