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Test Info: Warnings
- This test has a WPT meta file that expects 3 subtest issues.
- This WPT test may be referenced by the following Test IDs:
- /webaudio/the-audio-api/the-audiocontext-interface/audiocontextoptions.html - WPT Dashboard Interop Dashboard
<!DOCTYPE html>
<html>
<head>
<title>
Test AudioContextOptions
</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/webaudio/resources/audit.js"></script>
</head>
<body>
<script id="layout-test-code">
let context;
let defaultLatency;
let interactiveLatency;
let balancedLatency;
let playbackLatency;
let audit = Audit.createTaskRunner();
audit.define(
{
label: 'test-audiocontextoptions-latencyHint-basic',
description: 'Test creating contexts with basic latencyHint types.'
},
function(task, should) {
let closingPromises = [];
// Verify that an AudioContext can be created with default options.
should(function() {
context = new AudioContext()
}, 'context = new AudioContext()').notThrow();
should(context.sampleRate,
`context.sampleRate (${context.sampleRate} Hz)`).beGreaterThan(0);
defaultLatency = context.baseLatency;
should(defaultLatency, 'default baseLatency').beGreaterThanOrEqualTo(0);
// Verify that an AudioContext can be created with the expected
// latency types.
should(
function() {
context = new AudioContext({'latencyHint': 'interactive'})
},
'context = new AudioContext({\'latencyHint\': \'interactive\'})')
.notThrow();
interactiveLatency = context.baseLatency;
should(interactiveLatency, 'interactive baseLatency')
.beEqualTo(defaultLatency);
closingPromises.push(context.close());
should(
function() {
context = new AudioContext({'latencyHint': 'balanced'})
},
'context = new AudioContext({\'latencyHint\': \'balanced\'})')
.notThrow();
balancedLatency = context.baseLatency;
should(balancedLatency, 'balanced baseLatency')
.beGreaterThanOrEqualTo(interactiveLatency);
closingPromises.push(context.close());
should(
function() {
context = new AudioContext({'latencyHint': 'playback'})
},
'context = new AudioContext({\'latencyHint\': \'playback\'})')
.notThrow();
playbackLatency = context.baseLatency;
should(playbackLatency, 'playback baseLatency')
.beGreaterThanOrEqualTo(balancedLatency);
closingPromises.push(context.close());
Promise.all(closingPromises).then(function() {
task.done();
});
});
audit.define(
{
label: 'test-audiocontextoptions-latencyHint-double',
description:
'Test creating contexts with explicit latencyHint values.'
},
function(task, should) {
let closingPromises = [];
// Verify too small exact latency clamped to 'interactive'
should(
function() {
context =
new AudioContext({'latencyHint': interactiveLatency / 2})
},
'context = new AudioContext({\'latencyHint\': ' +
'interactiveLatency/2})')
.notThrow();
should(context.baseLatency, 'double-constructor baseLatency small')
.beLessThanOrEqualTo(interactiveLatency);
closingPromises.push(context.close());
// Verify that exact latency in range works as expected
let validLatency = (interactiveLatency + playbackLatency) / 2;
should(
function() {
context = new AudioContext({'latencyHint': validLatency})
},
'context = new AudioContext({\'latencyHint\': validLatency})')
.notThrow();
should(
context.baseLatency, 'double-constructor baseLatency inrange 1')
.beGreaterThanOrEqualTo(interactiveLatency);
should(
context.baseLatency, 'double-constructor baseLatency inrange 2')
.beLessThanOrEqualTo(playbackLatency);
closingPromises.push(context.close());
// Verify too big exact latency clamped to some value
let context1;
let context2;
should(function() {
context1 =
new AudioContext({'latencyHint': playbackLatency * 10});
context2 =
new AudioContext({'latencyHint': playbackLatency * 20});
}, 'creating two high latency contexts').notThrow();
should(context1.baseLatency, 'high latency context baseLatency')
.beEqualTo(context2.baseLatency);
should(context1.baseLatency, 'high latency context baseLatency')
.beGreaterThanOrEqualTo(interactiveLatency);
closingPromises.push(context1.close());
closingPromises.push(context2.close());
// Verify that invalid latencyHint values are rejected.
should(
function() {
context = new AudioContext({'latencyHint': 'foo'})
},
'context = new AudioContext({\'latencyHint\': \'foo\'})')
.throw(TypeError);
// Verify that no extra options can be passed into the
// AudioContextOptions.
should(
function() {
context = new AudioContext('latencyHint')
},
'context = new AudioContext(\'latencyHint\')')
.throw(TypeError);
Promise.all(closingPromises).then(function() {
task.done();
});
});
audit.define(
{
label: 'test-audiocontextoptions-sampleRate',
description:
'Test creating contexts with non-default sampleRate values.'
},
function(task, should) {
// A sampleRate of 1 is unlikely to be supported on any browser,
// test that this rate is rejected.
should(
() => {
context = new AudioContext({sampleRate: 1})
},
'context = new AudioContext({sampleRate: 1})')
.throw(DOMException, 'NotSupportedError');
// A sampleRate of 1,000,000 is unlikely to be supported on any
// browser, test that this rate is also rejected.
should(
() => {
context = new AudioContext({sampleRate: 1000000})
},
'context = new AudioContext({sampleRate: 1000000})')
.throw(DOMException, 'NotSupportedError');
// A negative sample rate should not be accepted
should(
() => {
context = new AudioContext({sampleRate: -1})
},
'context = new AudioContext({sampleRate: -1})')
.throw(DOMException, 'NotSupportedError');
// A null sample rate should not be accepted
should(
() => {
context = new AudioContext({sampleRate: 0})
},
'context = new AudioContext({sampleRate: 0})')
.throw(DOMException, 'NotSupportedError');
should(
() => {
context = new AudioContext({sampleRate: 24000})
},
'context = new AudioContext({sampleRate: 24000})')
.notThrow();
should(
context.sampleRate, 'sampleRate inrange')
.beEqualTo(24000);
context.close();
task.done();
});
audit.run();
</script>
</body>
</html>