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offlineaudiocontext-constructor.html
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<script src="../../resources/testharness.js"></script>
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<script src="../resources/audit.js"></script>
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<script id="layout-test-code">
let audit = Audit.createTaskRunner();
audit.define(
{label: 'test', description: 'OfflineAudioContext constructor'},
(task, should) => {
let context;
// Make sure we don't crash when giving 0 as number of frames.
should(
() => new OfflineAudioContext(1, 0, 44100),
'new OfflineAudioContext(1, 0, 44100)')
.throw();
// Make sure we don't throw exceptions for supported ranges of
// sample rates for an OfflineAudioContext.
should(
() => context = new OfflineAudioContext(2, 512, 2999),
'context0 = new OfflineAudioContext(2, 512, 2999)')
.throw();
should(
() => context = new OfflineAudioContext(2, 512, 3000),
'context1 = new OfflineAudioContext(2, 512, 3000)')
.notThrow();
should(context.length, 'context1.length').beEqualTo(512);
should(
() => context = new OfflineAudioContext(2, 1024, 768000),
'context2 = new OfflineAudioContext(2, 1024, 768000)')
.notThrow();
should(context.length, 'context2.length').beEqualTo(1024);
should(
() => context = new OfflineAudioContext(2, 1024, 768001),
'context3 = new OfflineAudioContext(2, 1024, 768001)')
.throw();
should(
() => context = new OfflineAudioContext(2, 2048, 8000),
'context4 = new OfflineAudioContext(2, 2048, 8000)')
.notThrow();
should(context.length, 'context4.length').beEqualTo(2048);
should(
() => context = new OfflineAudioContext(2, 4096, 11025),
'context5 = new OfflineAudioContext(2, 4096, 11025)')
.notThrow();
should(context.length, 'context5.length').beEqualTo(4096);
should(
() => context = new OfflineAudioContext(2, 512, 22050),
'context6 = new OfflineAudioContext(2, 512, 22050)')
.notThrow();
should(context.length, 'context6.length').beEqualTo(512);
should(
() => context = new OfflineAudioContext(2, 512, 44100),
'context7 = new OfflineAudioContext(2, 512, 44100)')
.notThrow();
should(context.length, 'context7.length').beEqualTo(512);
should(
() => context = new OfflineAudioContext(2, 512, 48000),
'context8 = new OfflineAudioContext(2, 512, 48000)')
.notThrow();
should(context.length, 'context8.length').beEqualTo(512);
should(
() => context = new OfflineAudioContext(2, 512, 88200),
'context9 = new OfflineAudioContext(2, 512, 88200)')
.notThrow();
should(context.length, 'context9.length').beEqualTo(512);
// Make sure length is read-only.
should(() => context.length = 99, 'context9.length = 99')
.notThrow();
should(context.length, 'context9.length after illegal setter value')
.beEqualTo(512);
should(
() => context = new OfflineAudioContext(2, 512, 96000),
'context10 = new OfflineAudioContext(2, 512, 96000)')
.notThrow();
// Make sure we throw exceptions for non-finite sample rates.
should(
() => context = new OfflineAudioContext(1, 0, NaN),
'context11 = new OfflineAudioContext(1, 0, NaN)')
.throw();
should(
() => context = new OfflineAudioContext(1, 0, Infinity),
'context12 = new OfflineAudioContext(1, 0, Infinity)')
.throw();
// Verify channel counts and other destination attributes are set
// correctly.
should(
() => context = new OfflineAudioContext(7, 512, 48000),
'context13 = new OfflineAudioContext(7, 512, 48000)')
.notThrow();
should(
context.destination.channelCount,
'context13.destination.channelCount')
.beEqualTo(7);
should(
context.destination.maxChannelCount,
'context13.destination.maxChannelCount')
.beEqualTo(7);
should(
context.destination.channelCountMode,
'context13.destination.channelCountMode')
.beEqualTo('explicit');
should(
context.destination.channelInterpretation,
'context13.destination.channelInterpretation')
.beEqualTo('speakers');
task.done();
});
audit.run();
</script>
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