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Issue 180203002:
Add EME content test that forces garbage collection (Closed)
Base URL: https://chromium.googlesource.com/chromium/blink.git@master| Index: LayoutTests/media/encrypted-media/encrypted-media-lifetime-mediakeys.html |
| diff --git a/LayoutTests/media/encrypted-media/encrypted-media-lifetime-mediakeys.html b/LayoutTests/media/encrypted-media/encrypted-media-lifetime-mediakeys.html |
| new file mode 100644 |
| index 0000000000000000000000000000000000000000..f6de0893d19a290c82cfc74ef24e7995ebf73900 |
| --- /dev/null |
| +++ b/LayoutTests/media/encrypted-media/encrypted-media-lifetime-mediakeys.html |
| @@ -0,0 +1,89 @@ |
| +<!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> |
| + <script src="encrypted-media-utils.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 this test, we add |
| + // a MediaKeySession (which are ActiveDOMObjects) to each one so |
| + // we can count. MediaKeySession objects will not be garbage collected |
| + // as long as the MediaKeys object is around (or the session gets |
| + // closed, which isn't happening in this test). |
| + test(function() |
| + { |
| + var mediaKeys; |
| + var initData = stringToUint8Array("mock"); |
| + var startingObjects = window.internals.activeDOMObjectCount(document); |
| + |
| + function numObjectsCreated() |
| + { |
| + return window.internals.activeDOMObjectCount(document) - startingObjects; |
| + } |
| + |
| + // Create a MediaKeys object and free immediately. |
| + 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(); |
| + |
| + // Create a MediaKeys object with a session. |
|
ddorwin
2014/02/28 05:09:38
By using separate test()'s, you can clearly separa
jrummell
2014/04/01 19:06:43
Done.
|
| + mediaKeys = new MediaKeys("org.w3.clearkey"); |
| + mediaKeys.createSession("video/webm", initData); |
| + assert_equals(numObjectsCreated(), 1); |
| + |
| + // Run gc(), should not affect MediaKeys object since we have |
| + // a reference to it, nor the session. |
|
ddorwin
2014/02/28 05:09:38
I think you mean to add the new text after "object
jrummell
2014/04/01 19:06:43
Done.
|
| + gc(); |
| + assert_equals(mediaKeys.keySystem, 'org.w3.clearkey'); |
| + assert_equals(numObjectsCreated(), 1); |
| + |
| + // Drop reference to the MediaKeys object and run gc again. |
| + // Object should be collected this time. Running gc() twice |
| + // as the first pass may not actually collect the created |
| + // session (session is only collected if the MediaKeys object |
| + // is gone, which won't happen if the first pass happens to |
| + // check the session object first). |
| + mediaKeys = null; |
| + gc(); |
| + gc(); |
| + assert_equals(numObjectsCreated(), 0); |
| + |
| + // Create a few MediaKeys objects. We don't want to trigger |
| + // a gc due to memory pressure. |
|
ddorwin
2014/02/28 05:09:38
Is that really likely? I don't think that's enough
jrummell
2014/04/01 19:06:43
Comment updated.
|
| + for (var i = 0; i < 5; ++i) { |
| + mediaKeys = new MediaKeys("org.w3.clearkey"); |
| + mediaKeys.createSession("video/webm", initData); |
| + } |
| + assert_equals(numObjectsCreated(), 5); |
| + |
| + // All but the last one created should be garbage collected. |
| + gc(); |
| + gc(); |
| + assert_equals(numObjectsCreated(), 1); |
| + |
| + // Last MediaKeys object created should still be referenced. |
| + assert_equals(mediaKeys.keySystem, 'org.w3.clearkey'); |
| + |
| + // Release the last MediaKeys object created. |
| + mediaKeys = null; |
| + gc(); |
| + gc(); |
| + assert_equals(numObjectsCreated(), 0); |
| + }, "MediaKeys lifetime"); |
| + </script> |
| + </body> |
| +</html> |
