| <!DOCTYPE html> |
| <html> |
| <head> |
| <title>MediaKeySession lifetime after release()</title> |
| <script src="encrypted-media-utils.js"></script> |
| <script src="../../resources/testharness.js"></script> |
| <script src="../../resources/testharnessreport.js"></script> |
| </head> |
| <body> |
| <div id="log"></div> |
| <script> |
| // Since MediaKeySession (but not MediaKeys) are ActiveDOMObjects, |
| // we can determine when they are garbage collected. |
| // MediaKeySessions remain as long as: |
| // JavaScript has a reference to it |
| // OR (MediaKeys is around |
| // AND the session has not received a close() event) |
| async_test(function(test) |
| { |
| var mediaKeys; |
| var mediaKeySession1; |
| var mediaKeySession2; |
| var initDataType; |
| var initData; |
| var startingActiveDOMObjectCount = window.internals.activeDOMObjectCount(document); |
| |
| function numActiveDOMObjectsCreated() |
| { |
| return window.internals.activeDOMObjectCount(document) - startingActiveDOMObjectCount; |
| } |
| |
| // Create 2 sessions. |
| getSupportedInitDataType().then(function(type) { |
| initDataType = type; |
| initData = getInitData(initDataType); |
| return navigator.requestMediaKeySystemAccess('org.w3.clearkey', [{}]); |
| }).then(function(access) { |
| return access.createMediaKeys(); |
| }).then(function(result) { |
| mediaKeys = result; |
| |
| // Verify MediaKeys are not an ActiveDOMObject. |
| // In non-Oilpan, numActiveDOMObjectsCreate() == 0. |
| // In Oilpan, numActiveDOMObjectsCreate() <= 3. |
| // (1 MediaKeysInitializer and |
| // 1 MediaKeySystemAccessInitializer (navigator.requestMediaKeySystemAccess() use above), |
| // 1 MediaKeySystemAccessInitializer (isInitDataSupported() (via getSupportedInitDataType()))) |
| assert_less_than_equal(numActiveDOMObjectsCreated(), 3, 'MediaKeys.create()'); |
| |
| mediaKeySession1 = mediaKeys.createSession(); |
| return mediaKeySession1.generateRequest(initDataType, initData); |
| }).then(function() { |
| // Should be 1 MediaKeySession. |
| // In non-Oilpan, numActiveDOMObjectsCreate() == 1. |
| // In Oilpan, numActiveDOMObjectsCreate() <= 5. |
| // (1 MediaKeysInitializer, |
| // 2 MediaKeySystemAccessInitializers, |
| // 1 ContentDecryptionModuleResultPromise and |
| // 1 MediaKeySession). |
| assert_less_than_equal(numActiveDOMObjectsCreated(), 5, 'MediaKeys.createSession(1)'); |
| mediaKeySession2 = mediaKeys.createSession(); |
| return mediaKeySession2.generateRequest(initDataType, initData); |
| }).then(function() { |
| // Should be 2 MediaKeySessions. |
| // In non-Oilpan, numActiveDOMObjectsCreate() == 2. |
| // In Oilpan, numActiveDOMObjectsCreate() <= 7. |
| // (1 MediaKeysInitializer, |
| // 2 MediaKeySystemAccessInitializers, |
| // 2 ContentDecryptionModuleResultPromise and |
| // 2 MediaKeySession). |
| assert_less_than_equal(numActiveDOMObjectsCreated(), 7, 'mediaKeys.createSession(2)'); |
| // Close the sessions. Once completed, only the JS |
| // reference to them keeps them around. |
| return mediaKeySession1.close(); |
| }).then(function(result) { |
| return mediaKeySession2.close(); |
| }).then(function(result) { |
| // Since both sessions have been closed, dropping the |
| // reference to them from JS will result in the session |
| // being garbage-collected. |
| // Should be 2 MediaKeySessions. |
| // In non-Oilpan, numActiveDOMObjectsCreate() == 2. |
| // In Oilpan, numActiveDOMObjectsCreate() <= 9. |
| // (1 MediaKeysInitializer, |
| // 2 MediaKeySystemAccessInitializers, |
| // 4 ContentDecryptionModuleResultPromise and |
| // 2 MediaKeySession). |
| assert_less_than_equal(numActiveDOMObjectsCreated(), 9, 'after close'); |
| |
| mediaKeySession1 = null; |
| return createGCPromise(); |
| }).then(function(result) { |
| // Only mediaKeySession2 should remain. |
| assert_less_than_equal(numActiveDOMObjectsCreated(), 2, 'mediaKeySession1 not collected'); |
| |
| mediaKeySession2 = null; |
| return createGCPromise(); |
| }).then(function(result) { |
| assert_less_than_equal(numActiveDOMObjectsCreated(), 1, 'mediaKeySession2 not collected'); |
| test.done(); |
| }).catch(function(error) { |
| forceTestFailureFromPromise(test, error); |
| }); |
| }, 'MediaKeySession lifetime after release()'); |
| </script> |
| </body> |
| </html> |
