LayoutTests/media/encrypted-media/encrypted-media-lifetime-mediakeys.html - Issue 180203002: Add EME content test that forces garbage collection

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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

Patch Set: lifetime-mediakeys Created 6 years, 10 months ago

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	1 <!DOCTYPE html>

	2 <html>

	3 <head>

	4 <title>Test MediaKeys lifetime</title>
	ddorwin 2014/02/26 22:40:40 This doesn't seem to do much more than test the st This doesn't seem to do much more than test the standard GC in Blink. (There might be some value if it was an ActiveDOMObject, but even then we would have more test cases to check the isActive() logic.) This doesn't really test the lifetime very much. It doesn't attach to a video or rely on the session to keep the CDM alive (potentially another test). If we can't check that objects are destroyed (can we with internals somehow?), what are we trying to test? That we don't crash? If so, we should probably be doing something more interesting.
	5 <script src="../../resources/testharness.js"></script>

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

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

	8 </head>

	9 <body>

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

	11 <script>

	12 test(function()

	13 {

	14 var mediaKeys;

	15

	16 // Create a MediaKeys object.

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

	18 assert_not_equals(mediaKeys, null);

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

	20

	21 // Run gc(), should not affect MediaKeys object since we have

	22 // a reference to it.

	23 gc();

	24 assert_not_equals(mediaKeys, null);

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

	26

	27 // Drop reference to the MediaKeys object and run gc again.

	28 // Object should be collected this time.

	29 mediaKeys = null;

	30 gc();

	31

	32 // Create a large number of MediaKeys objects and then run gc.

	33 // All but the last one created should be garbage collected.
	ddorwin 2014/02/26 22:40:40 We can't actually verify the others are GC'd unles We can't actually verify the others are GC'd unless we have framework support for counting objects.
	34 for (var i = 0; i < 100; ++i)

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

	36 gc();

	37

	38 // Last MediaKeys object created should still be referenced.

	39 assert_not_equals(mediaKeys, null);

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

	41

	42 // Release the last MediaKeys object created.

	43 mediaKeys = null;

	44 gc();

	45 }, "MediaKeys lifetime");

	46 </script>

	47 </body>

	48 </html>

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