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| (Empty) |
| 1 <!DOCTYPE html> | |
| 2 <script src="../../resources/js-test.js"></script> | |
| 3 <body> | |
| 4 <script> | |
| 5 description('Tests that a script processor node is not prematurely GCed'); | |
| 6 var jsTestIsAsync = true; | |
| 7 | |
| 8 if (!window.internals) { | |
| 9 testFailed('This test requires window.internals.'); | |
| 10 finishJSTest(); | |
| 11 } | |
| 12 | |
| 13 var wasCalled, wasCollectedPrematurely, savedNode, savedCallback; | |
| 14 | |
| 15 function test(saveReference, nextStep) { | |
| 16 debug('Testing ' + (saveReference ? 'with' : 'without') + ' explicitly ' + | |
| 17 'keeping a reference to the script processor node alive.'); | |
| 18 | |
| 19 // Create an audio context | |
| 20 var context = new OfflineAudioContext( | |
| 21 2, // channels | |
| 22 4096, // length (frames) | |
| 23 44100.0); // sample rate | |
| 24 | |
| 25 // Set up a source, reading from an empty buffer | |
| 26 var source = context.createBufferSource(); | |
| 27 source.buffer = context.createBuffer( | |
| 28 2, // source channels | |
| 29 4096, // length (frames) | |
| 30 44100.0); // sample rate | |
| 31 | |
| 32 // Set up a script processor node to generate something | |
| 33 var node = context.createScriptProcessor( | |
| 34 512, // buffer size | |
| 35 0, // input channels | |
| 36 2); // output channels | |
| 37 | |
| 38 // source -> script processor node -> destination | |
| 39 source.connect(node); | |
| 40 node.connect(context.destination); | |
| 41 | |
| 42 // Set up something which indicates whether we're called to | |
| 43 // generate anything | |
| 44 | |
| 45 wasCalled = false; | |
| 46 var callback = function () { wasCalled = true; }; | |
| 47 node.onaudioprocess = callback; | |
| 48 | |
| 49 if (saveReference) { | |
| 50 savedNode = node; | |
| 51 savedCallback = callback; | |
| 52 } | |
| 53 | |
| 54 // Watch the callback; if it dies, we're obviously not generating anything | |
| 55 | |
| 56 var observation = internals.observeGC(callback); | |
| 57 node = callback = null; | |
| 58 gc(); | |
| 59 wasCollectedPrematurely = observation.wasCollected; | |
| 60 | |
| 61 // Make some noise! | |
| 62 | |
| 63 source.start(0); | |
| 64 context.oncomplete = check(nextStep); | |
| 65 context.startRendering(); | |
| 66 } | |
| 67 | |
| 68 function check(nextStep) { | |
| 69 return function () { | |
| 70 shouldBeFalse('wasCollectedPrematurely'); | |
| 71 shouldBeTrue('wasCalled'); | |
| 72 nextStep(); | |
| 73 }; | |
| 74 } | |
| 75 | |
| 76 function step1() { | |
| 77 test(true, step2); | |
| 78 } | |
| 79 | |
| 80 function step2() { | |
| 81 test(false, finishJSTest); | |
| 82 } | |
| 83 | |
| 84 step1(); | |
| 85 | |
| 86 var successfullyParsed = true; | |
| 87 </script> | |
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Chromium Code Reviews
Issue 2815493002:
Move layout tests that use 'js-test.js' to |internals| directory (Closed)
