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Test Info:
- This WPT test may be referenced by the following Test IDs:
- /html/semantics/embedded-content/media-elements/event_volumechange.html - WPT Dashboard Interop Dashboard
<!doctype html>
<title>volumechange event</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<div id="log"></div>
<script>
function volumechange_test(tagName) {
async_test(function(t) {
var e = document.createElement(tagName);
assert_equals(e.volume, 1);
e.volume = 0.5;
assert_equals(e.volume, 0.5);
e.onvolumechange = t.step_func(function() {
assert_equals(e.volume, 0.5);
e.volume = 1;
assert_equals(e.volume, 1);
e.onvolumechange = t.step_func(function() {
assert_equals(e.volume, 1);
t.done();
});
});
}, "setting " + tagName + ".volume fires volumechange");
async_test(function(t) {
var e = document.createElement(tagName);
assert_false(e.muted);
e.muted = true;
assert_true(e.muted);
e.onvolumechange = t.step_func(function() {
assert_true(e.muted);
e.muted = false;
assert_false(e.muted);
e.onvolumechange = t.step_func(function() {
assert_false(e.muted);
t.done();
});
});
}, "setting " + tagName + ".muted fires volumechange");
async_test(function(t) {
var e = document.createElement(tagName);
e.volume = e.volume;
e.muted = e.muted;
e.onvolumechange = t.step_func(function() {
assert_unreached();
});
var e2 = document.createElement(tagName);
e2.muted = !e2.muted;
e2.onvolumechange = t.step_func(function() {
t.done();
});
}, "setting " + tagName + ".volume/muted to the same value does not fire volumechange");
async_test(function(t) {
var e = document.createElement(tagName);
e.muted = !e.muted;
e.volume = 1 - e.volume;
e.muted = !e.muted;
e.volume = 1 - e.volume;
var volumechange_count = 0;
e.onvolumechange = t.step_func(function() {
volumechange_count++;
if (volumechange_count == 4) {
t.done();
}
});
}, "setting " + tagName + ".volume/muted repeatedly fires volumechange repeatedly");
}
volumechange_test("audio");
volumechange_test("video");
</script>