<!doctype html>
<html>
<head>
<title>Test GC of ScriptProcessorNode</title>
<script src="../../resources/gc.js"></script>
<script src="../../resources/testharness.js"></script>
<script src="../../resources/testharnessreport.js"></script>
<script src="../resources/audit-util.js"></script>
<script src="../resources/audit.js"></script>
</head>
<body>
<script>
// Power of two so there's no round-off in computing time from frame.
// Otherwise, it's arbitrary.
const sampleRate = 32768;
const audit = Audit.createTaskRunner();
// Number of ScriptProcessorNodes to create for testing. Fairly
// arbitrary, but we don't need a huge number.
const numberOfNodes = 20;
audit.define('Test GC of ScriptProcessorNodes', (task, should) => {
// Initial number of handlers.
let initialCount = 0;
let nodes = [];
let context = new OfflineAudioContext(
{length: sampleRate, sampleRate: sampleRate});
asyncGC()
.then(() => {
initialCount = internals.audioHandlerCount();
// For information only
should(initialCount, 'Number of handlers before GC')
.beEqualTo(initialCount);
})
.then(() => {
// Create a bunch of ScriptProcessorNodes for testing
for (let k = 0; k < numberOfNodes; ++k) {
let node = context.createScriptProcessor(256, 1, 1);
node.onaudioprocess = (event) => {
// Just copy input to output.
let input = event.inputBuffer.getChannelData(0);
event.outputBuffer.copyToChannel(input, 0, 0);
};
node.connect(context.destination);
nodes.push(node);
}
// Wait a bit and then remove the event listener and drop all
// references to the nodes.
context.suspend(1024 / context.sampleRate)
.then(() => {
// Remove the event listener
for (let k = 0; k < nodes.length; ++k) {
nodes[k].onaudioprocess = null;
}
// Drop all references to the nodes
nodes.fill(null);
})
.then(() => context.resume());
// Render the graph
return context.startRendering();
})
.then(() => {
// Collect garbage which should remove all of the
// ScriptProcessorNodes.
return asyncGC();
})
.then(() => {
should(nodes.length, 'Number of nodes created')
.beEqualTo(numberOfNodes);
should(
internals.audioHandlerCount(), 'Number of handlers after GC')
.beEqualTo(initialCount);
})
.then(() => task.done());
});
audit.run();
</script>
</body>
</html>
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