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Commit fce86fe4 authored by jrummell@chromium.org's avatar jrummell@chromium.org
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Add EME layout test that tests MediaKeys lifetime 

Adding a new layout test for EME that allocates a bunch of MediaKey objects and then forces garbage collection.

BUG=341567
TEST=new layout test passes

Review URL: https://codereview.chromium.org/180203002

git-svn-id: svn://svn.chromium.org/blink/trunk@170718 bbb929c8-8fbe-4397-9dbb-9b2b20218538
parent 4cd347d3
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third_party/WebKit/LayoutTests/media/encrypted-media/encrypted-media-lifetime-mediakeys-expected.txt 0 → 100644
View file @ fce86fe4
This is a testharness.js-based test.
PASS MediaKeys lifetime
PASS MediaKeys lifetime with session
PASS Multiple MediaKeys lifetime
Harness: the test ran to completion.
third_party/WebKit/LayoutTests/media/encrypted-media/encrypted-media-lifetime-mediakeys.html 0 → 100644
View file @ fce86fe4
<!DOCTYPE html>
<html>
<head>
<title>Test MediaKeys lifetime</title>
<script src="../../resources/testharness.js"></script>
<script src="../../resources/testharnessreport.js"></script>
<script src="../../resources/gc.js"></script>
</head>
<body>
<div id="log"></div>
<script>
// Since MediaKeys are not ActiveDOMObjects, it is hard to
// determine when they are garbage collected. For some tests below
// a MediaKeySession (which is an ActiveDOMObject) is added so
// there is something to count.
// MediaKeySessions remain as long as:
// JavaScript has a reference to it
// OR (MediaKeys is around AND the session has not received a close() event)
// In the tests below, we do not close any session nor keep a
// Javascript reference to any session, so MediaKeySessions remain
// as long as the associated MediaKeys object is around.
// For this test, simply verify that creating and destroying
// MediaKeys doesn't crash.
test(function()
{
// Create a MediaKeys object and free immediately.
var mediaKeys = new MediaKeys("org.w3.clearkey");
mediaKeys = null;
gc();
// Create a MediaKeys object and make sure gc doesn't free it
// as long as we have a reference.
mediaKeys = new MediaKeys("org.w3.clearkey");
gc();
assert_equals(mediaKeys.keySystem, 'org.w3.clearkey');
mediaKeys = null;
gc();
}, "MediaKeys lifetime");
// For this test, create a MediaKeySession (which is an
// ActiveDOMObject) and verify lifetime.
test(function()
{
var mediaKeys;
var initData = new Uint8Array([0, 1, 2, 3, 4, 5, 6, 7]);
var startingActiveDOMObjectCount = window.internals.activeDOMObjectCount(document);
function numActiveDOMObjectsCreated()
{
return window.internals.activeDOMObjectCount(document) - startingActiveDOMObjectCount;
}
// Create a MediaKeys object with a session.
mediaKeys = new MediaKeys("org.w3.clearkey");
mediaKeys.createSession("video/webm", initData);
assert_equals(numActiveDOMObjectsCreated(), 1);
// Run gc(), should not affect MediaKeys object nor the session
// since we still have a reference to it.
gc();
assert_equals(mediaKeys.keySystem, 'org.w3.clearkey');
assert_equals(numActiveDOMObjectsCreated(), 1);
// Drop reference to the MediaKeys object and run gc again.
// Object should be collected this time. Since
// MediaKeySessions remain alive as long as MediaKeys is around,
// it is possible that gc() checks the MediaKeySession object
// first, and doesn't collect it since MediaKeys hasn't been
// collected yet. Thus run gc() twice, to ensure that the
// unreferenced MediaKeySession object get collected.
mediaKeys = null;
gc();
gc();
assert_equals(numActiveDOMObjectsCreated(), 0);
}, "MediaKeys lifetime with session");
// For this test, create several MediaKeys (with MediaKeySessions so
// they can be counted) and verify lifetime.
test(function()
{
var mediaKeys;
var initData = new Uint8Array([0, 1, 2, 3, 4, 5, 6, 7]);
var startingActiveDOMObjectCount = window.internals.activeDOMObjectCount(document);
function numActiveDOMObjectsCreated()
{
return window.internals.activeDOMObjectCount(document) - startingActiveDOMObjectCount;
}
// Create a few MediaKeys objects. Only keep a reference to the
// last one created.
for (var i = 0; i < 5; ++i) {
mediaKeys = new MediaKeys("org.w3.clearkey");
mediaKeys.createSession("video/webm", initData);
}
assert_equals(numActiveDOMObjectsCreated(), 5);
// All but the last one created should be garbage collected.
// Since MediaKeySessions remain alive as long as MediaKeys is
// around, it is possible that gc() checks the MediaKeySession
// object first, and doesn't collect it since MediaKeys hasn't
// been collected yet. Thus run gc() twice, to ensure that the
// unreferenced MediaKeySession objects get collected.
gc();
gc();
assert_equals(numActiveDOMObjectsCreated(), 1);
assert_equals(mediaKeys.keySystem, 'org.w3.clearkey');
// Release the last MediaKeys object created.
mediaKeys = null;
gc();
gc();
assert_equals(numActiveDOMObjectsCreated(), 0);
}, "Multiple MediaKeys lifetime");
</script>
</body>
</html>
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