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Test Info:
- This WPT test may be referenced by the following Test IDs:
- /webaudio/the-audio-api/the-audiobuffersourcenode-interface/audiobuffersource-channels.html - WPT Dashboard Interop Dashboard
<!DOCTYPE html>
<html>
<head>
<title>audiobuffersource-channels.html</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/webaudio/resources/audit-util.js"></script>
</head>
<body>
<script>
test(() => {
const context = new AudioContext();
const source = new AudioBufferSourceNode(context);
// Make sure we can't set to something which isn't an AudioBuffer.
assert_throws_js(TypeError, () => {
source.buffer = 57;
}, 'source.buffer = 57');
// It's ok to set the buffer to null.
source.buffer = null;
// Set the buffer to a valid AudioBuffer
const buffer = new AudioBuffer({
length: 128,
sampleRate: context.sampleRate});
source.buffer = buffer;
// The buffer has been set; we can't set it again.
assert_throws_dom('InvalidStateError', () => {
source.buffer = new AudioBuffer({
length: 128,
sampleRate: context.sampleRate});
}, 'source.buffer = new buffer');
// The buffer has been set; it's ok to set it to null.
source.buffer = null;
// The buffer was already set (and set to null). Can't set it again.
assert_throws_dom('InvalidStateError', () => {
source.buffer = buffer;
}, 'source.buffer = buffer again');
// But setting to null is ok.
source.buffer = null;
// Check that mono buffer can be set.
{
const monoBuffer = new AudioBuffer({
numberOfChannels: 1,
length: 1024,
sampleRate: context.sampleRate});
const testSource = new AudioBufferSourceNode(context);
testSource.buffer = monoBuffer;
}
// Check that stereo buffer can be set.
{
const stereoBuffer = new AudioBuffer({
numberOfChannels: 2,
length: 1024,
sampleRate: context.sampleRate});
const testSource = new AudioBufferSourceNode(context);
testSource.buffer = stereoBuffer;
}
// Check buffers with more than two channels.
for (let i = 3; i < 10; ++i) {
const buffer = new AudioBuffer({
numberOfChannels: i,
length: 1024,
sampleRate: context.sampleRate});
const testSource = new AudioBufferSourceNode(context);
testSource.buffer = buffer;
}
}, 'validate .buffer: Validation of AudioBuffer in ' +
'.buffer attribute setter');
</script>
</body>
</html>