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<head>
<title>
offlineaudiocontext-suspend-resume-eventhandler.html
</title>
<script src="../../imported/w3c/web-platform-tests/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 id="layout-test-code">
let audit = Audit.createTaskRunner();
let context;
let renderQuantum = 128;
// The sample rate is multiple of the rendering quantum, so suspension
// times in the test will fall on the render quantum boundary. Although
// this is not necessary, it is easier to understand the test.
let sampleRate = renderQuantum * 100;
let renderDuration = 2;
let scheduledSuspendTime = 0;
// With the sample rate setting above, this ensures suspension time fall
// in to the render quantum boundary.
let suspendInterval = 0.25;
audit.define(
{
label: 'test',
description: 'Test event handler from resume() and suspend()'
},
(task, should) => {
context = new OfflineAudioContext(
1, sampleRate * renderDuration, sampleRate);
context.onstatechange = function() {
if (context.state === 'suspended' &&
context.currentTime === scheduledSuspendTime) {
should(
context.state === 'suspended' &&
context.currentTime === scheduledSuspendTime,
'onstatechange event handler: context is suspended at ' +
scheduledSuspendTime + ' second(s)')
.beTrue();
scheduledSuspendTime = context.currentTime + suspendInterval;
// Scheduling a suspend before the render duration should pass.
if (scheduledSuspendTime < renderDuration) {
should(
() => context.suspend(scheduledSuspendTime),
'Scheduling a new suspend at ' + scheduledSuspendTime +
' second(s)')
.notThrow();
;
}
// Scheduling a suspend exactly at the render duration should be
// rejected.
if (scheduledSuspendTime === renderDuration) {
should(
context.suspend(scheduledSuspendTime),
'Scheduling at ' + renderDuration + ' seconds')
.beRejected();
}
context.resume();
}
};
// This test is for verifying all the event handlers on OAC and that
// is why 'oncomplete' is used here.
context.oncomplete = function() {
should(context.state, 'oncomplete event handler: context.state')
.beEqualTo('closed');
task.done();
};
// Schedule the first suspension.
should(
() => context.suspend(scheduledSuspendTime),
'A new suspend has been scheduled at ' + scheduledSuspendTime +
' second(s)')
.notThrow();
;
context.startRendering();
});
audit.run();
</script>
</body>
</html>