<!DOCTYPE html>
<html>
<head>
<title>Test MediaKeySession lifetime without release()</title>
<script src="encrypted-media-utils.js"></script>
<script src="../../resources/testharness.js"></script>
<script src="../../resources/testharnessreport.js"></script>
</head>
<body>
<script>
// MediaKeySessions remain as long as:
// JavaScript has a reference to it
// OR (MediaKeys is around
// AND the session has not received a close() event)
promise_test(function(test)
{
var mediaKeys;
var mediaKeySession1;
var mediaKeySession2;
var mediaKeySession3;
var initDataType;
var initData;
// Even though there should be no existing objects, start by
// running gc() and verifying that none exist. This also
// allows the failures to be reported from inside a promise
// so that the test fails properly.
return createGCPromise().then(function() {
verifyMediaKeyAndMediaKeySessionCount(0, 0, 'After initial gc()');
return navigator.requestMediaKeySystemAccess('org.w3.clearkey', getSimpleConfiguration());
}).then(function(access) {
initDataType = access.getConfiguration().initDataTypes[0];
initData = getInitData(initDataType);
return access.createMediaKeys();
}).then(function(result) {
mediaKeys = result;
assert_equals(typeof mediaKeys.createSession, 'function');
verifyMediaKeyAndMediaKeySessionCount(1, 0, 'MediaKeys.create()');
// Create 3 sessions.
mediaKeySession1 = mediaKeys.createSession();
return mediaKeySession1.generateRequest(initDataType, initData);
}).then(function() {
assert_true(mediaKeySession1.sessionId && mediaKeySession1.sessionId.length > 0);
verifyMediaKeyAndMediaKeySessionCount(1, 1, 'MediaKeys.createSession(1)');
mediaKeySession2 = mediaKeys.createSession();
return mediaKeySession2.generateRequest(initDataType, initData);
}).then(function() {
assert_true(mediaKeySession2.sessionId && mediaKeySession2.sessionId.length > 0);
verifyMediaKeyAndMediaKeySessionCount(1, 2, 'mediaKeys.createSession(2)');
mediaKeySession3 = mediaKeys.createSession();
return mediaKeySession3.generateRequest(initDataType, initData);
}).then(function() {
assert_true(mediaKeySession3.sessionId && mediaKeySession3.sessionId.length > 0);
verifyMediaKeyAndMediaKeySessionCount(1, 3, 'mediaKeys.createSession(3)');
// Run gc(). All sessions should remain as we have a
// reference to each one. However, running gc()
// asynchronously should free up the last PromiseResolver.
return createGCPromise();
}).then(function(result) {
verifyMediaKeyAndMediaKeySessionCount(1, 3, 'After gc()');
// Now drop references to 2 of the sessions. Even though we
// don't have a reference, MediaKeys is still around (and
// the sessions aren't closed), so the objects won't be
// collected.
mediaKeySession1 = null;
mediaKeySession2 = null;
return createGCPromise();
}).then(function(result) {
return createGCPromise();
}).then(function(result) {
verifyMediaKeyAndMediaKeySessionCount(1, 3, 'After second gc()');
// Now drop the reference to MediaKeys. It and the 2
// unreferenced sessions should be collected. Since
// MediaKeySessions remain alive as long as MediaKeys is
// around, it is possible that gc() checks one or both
// MediaKeySession objects first, and doesn't collect them
// since MediaKeys hasn't been collected yet. Thus run gc()
// twice, to ensure that the unreferenced MediaKeySession
// objects get collected.
mediaKeys = null;
return createGCPromise();
}).then(function(result) {
return createGCPromise();
}).then(function(result) {
verifyMediaKeyAndMediaKeySessionCount(0, 1, 'After mediaKeys = null');
// Drop the reference to the last session. It should get
// collected now since MediaKeys is gone.
mediaKeySession3 = null;
return createGCPromise();
}).then(function(result) {
verifyMediaKeyAndMediaKeySessionCount(0, 0, 'After final gc()');
});
}, 'MediaKeySession lifetime without release()');
</script>
</body>
</html>
Codebase Browser
chromium