LayoutTests/media/encrypted-media/encrypted-media-lifetime-mediakeysession-reference.html - Issue 209103002: Add lifetime tests for MediaKeySession

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Issue 209103002: Add lifetime tests for MediaKeySession (Closed) Base URL: https://chromium.googlesource.com/chromium/blink.git@master

Patch Set: remove onMessage() Created 6 years, 9 months ago

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	1 <!DOCTYPE html>

	2 <html>

	3 <head>

	4 <title>Test MediaKeySession lifetime</title>

	5 <script src="../w3c-media-utils.js"></script>

	6 <script src="../../resources/testharness.js"></script>

	7 <script src="../../resources/testharnessreport.js"></script>

	8 <script src="../../resources/gc.js"></script>

	9 </head>

	10 <body>

	11 <div id="log"></div>

	12 <script>

	13 setup({ timeout: 60000 }); // Timeout for all tests to run.

	14

	15 // Since MediaKeySession (but not MediaKeys) are ActiveDOMObjects,

	16 // we can determine when they are garbage collected.

	17 // MediaKeySessions remain as long as:

	18 // JavaScript has a reference to it

	19 // OR (MediaKeys is around AND the session has not received a clos e() event)

	20 test(function()

	21 {

	22 var initData = new Uint8Array([0, 1, 2, 3, 4, 5, 6, 7]);

	23 var startingActiveDOMObjectCount = window.internals.activeDOMObj ectCount(document);

	24

	25 function numActiveDOMObjectsCreated()

	26 {

	27 return window.internals.activeDOMObjectCount(document) - sta rtingActiveDOMObjectCount;

	28 }

	29

	30 var mediaKeys = new MediaKeys("org.w3.clearkey");

	31 assert_equals(mediaKeys.keySystem, 'org.w3.clearkey');

	32

	33 // Verify MediaKeys are not ActiveDOMObjects.

	34 assert_equals(numActiveDOMObjectsCreated(), 0, "MediaKeys create d an ActiveDOMObject");

	35

	36 // Create 3 sessions.

	37 var mediaKeySession1 = mediaKeys.createSession("video/webm", ini tData);

	38 assert_equals(numActiveDOMObjectsCreated(), 1);

	39 var mediaKeySession2 = mediaKeys.createSession("video/webm", ini tData);

	40 assert_equals(numActiveDOMObjectsCreated(), 2);

	41 var mediaKeySession3 = mediaKeys.createSession("video/webm", ini tData);

	42 assert_equals(numActiveDOMObjectsCreated(), 3);

	43

	44 // Run gc(). All sessions should remain as we have a reference

	45 // to each one.

	46 gc();

	47 assert_equals(numActiveDOMObjectsCreated(), 3);

	48

	49 // Now drop references to 2 of the sessions. Even though we

	50 // don't have a reference, MediaKeys is still around (and the

	51 // sessions aren't closed), so the objects won't be collected.

	52 mediaKeySession2 = null;

	53 mediaKeySession3 = null;

	54 gc();

	55 assert_equals(numActiveDOMObjectsCreated(), 3);

	56

	57 // Now drop the reference to MediaKeys. It and the 2

	58 // unreferenced sessions should be collected. Since

	59 // MediaKeySessions remain alive as long as MediaKeys is around,

	60 // it is possible that gc() checks one or both MediaKeySession

	61 // objects first, and doesn't collect them since MediaKeys

	62 // hasn't been collected yet. Thus run gc() twice, to ensure

	63 // that the unreferenced MediaKeySession objects get collected.

	64 mediaKeys = null;

	65 gc();

	66 gc();

	67 assert_equals(numActiveDOMObjectsCreated(), 1);

	68

	69 // Drop the reference to the first session. It should get

	70 // collected now since MediaKeys is gone.

	71 mediaKeySession1 = null;

	72 gc();

	73 assert_equals(numActiveDOMObjectsCreated(), 0);

	74 }, "MediaKeySession lifetime without release()", { timeout: 60000 }) ;

	75 </script>

	76 </body>

	77 </html>

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