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Test Info:
- This WPT test may be referenced by the following Test IDs:
- /webaudio/the-audio-api/the-mediastreamaudiodestinationnode-interface/ctor-mediastreamaudiodestination.html - WPT Dashboard Interop Dashboard
<!DOCTYPE html>
<html>
<head>
<title>MediaStreamAudioDestinationNode Constructor</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
</head>
<body>
<script>
let context;
test(t => {
assert_not_equals(
typeof AudioContext, "undefined",
"AudioContext should be defined");
// Need AudioContext, not OfflineAudioContext, for these tests.
context = new AudioContext();
}, 'AudioContext can be created without throwing');
test(t => {
assert_throws_js(
TypeError,
() => {
new MediaStreamAudioDestinationNode();
},
'no arguments throws TypeError');
assert_throws_js(TypeError, () => {
new MediaStreamAudioDestinationNode(1);
}, 'invalid context argument throws');
assert_throws_js(TypeError, () => {
new MediaStreamAudioDestinationNode(context, 42);
}, 'invalid options argument throws');
}, 'MediaStreamAudioDestinationNode: invalid constructor cases');
test(t => {
const node = new MediaStreamAudioDestinationNode(context);
assert_true(node instanceof MediaStreamAudioDestinationNode);
assert_equals(node.numberOfInputs, 1);
assert_equals(node.numberOfOutputs, 0);
assert_equals(node.channelCount, 2);
assert_equals(node.channelCountMode, 'explicit');
assert_equals(node.channelInterpretation, 'speakers');
}, 'MediaStreamAudioDestinationNode: default constructor behavior');
test(t => {
const node = new MediaStreamAudioDestinationNode(context, {
// An arbitrary but valid, non-default count for this node.
channelCount: 7
});
assert_equals(
node.channelCount, 7, 'channelCount should be set to 7');
assert_equals(node.channelCountMode, 'explicit');
assert_equals(node.channelInterpretation, 'speakers');
}, 'MediaStreamAudioDestinationNode applies channelCount from options');
</script>
</body>
</html>