зеркало из https://github.com/mozilla/gecko-dev.git
88 строки
2.8 KiB
HTML
88 строки
2.8 KiB
HTML
<!DOCTYPE html>
|
|
<html>
|
|
<!--
|
|
https://bugzilla.mozilla.org/show_bug.cgi?id=1308069
|
|
-->
|
|
<head>
|
|
<title>Bug 1308069</title>
|
|
<script src="/tests/SimpleTest/SimpleTest.js"></script>
|
|
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css">
|
|
</head>
|
|
<body>
|
|
<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1308069">Mozilla Bug 1308069</a>
|
|
<script class="testbody" type="text/javascript">
|
|
|
|
function testClearPendingErrorEvent() {
|
|
return new Promise(function(aResolve, aReject) {
|
|
var hasErrorEvent = false;
|
|
var imgTarget = new Image();
|
|
|
|
var imgForChangingTargetSrc = new Image();
|
|
// Queue an error event for changing imgTarget's src.
|
|
imgForChangingTargetSrc.src = '';
|
|
imgForChangingTargetSrc.onerror = function() {
|
|
// This clears imgTarget's pending error event.
|
|
imgTarget.src = 'data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="96" height="96"><path d="M10,10L32,90L90,32z" fill="lightgreen"/></svg>';
|
|
|
|
// Queue an error event for checking and resolving promise.
|
|
var imgForCheckingAndResolvingPromise = new Image();
|
|
imgForCheckingAndResolvingPromise.src = '';
|
|
imgForCheckingAndResolvingPromise.onerror = function() {
|
|
ok(!hasErrorEvent,
|
|
'Should not receive an error event since the pending error event ' +
|
|
'should be cleared before it fired');
|
|
aResolve();
|
|
};
|
|
};
|
|
|
|
// Setting src to empty string queues an error event.
|
|
imgTarget.src = '';
|
|
imgTarget.onerror = function() {
|
|
hasErrorEvent = true;
|
|
};
|
|
});
|
|
}
|
|
|
|
function testReplacePendingErrorEvent() {
|
|
return new Promise(function(aResolve) {
|
|
var numOfErrorEvent = 0;
|
|
var imgTarget = new Image();
|
|
|
|
var imgForChangingTargetSrc = new Image();
|
|
// Queue an error event for changing imgTarget's src.
|
|
imgForChangingTargetSrc.src = '';
|
|
imgForChangingTargetSrc.onerror = function() {
|
|
// This clears pending error event and fires a new one.
|
|
imgTarget.src = '';
|
|
|
|
// Queue an error event for checking and resolving promise.
|
|
var imgForCheckingAndResolvingPromise = new Image();
|
|
imgForCheckingAndResolvingPromise.src = '';
|
|
imgForCheckingAndResolvingPromise.onerror = function() {
|
|
is(numOfErrorEvent, 1,
|
|
'Should only receive one error event since the first pending error ' +
|
|
'event should be cleared before it fired');
|
|
aResolve();
|
|
};
|
|
};
|
|
|
|
// Setting src to empty string queues an error event.
|
|
imgTarget.src = '';
|
|
imgTarget.onerror = function() {
|
|
numOfErrorEvent++;
|
|
};
|
|
});
|
|
}
|
|
|
|
SimpleTest.waitForExplicitFinish();
|
|
|
|
Promise.resolve()
|
|
.then(() => testClearPendingErrorEvent())
|
|
.then(() => testReplacePendingErrorEvent())
|
|
.catch((err) => ok(false, "promise rejected: " + err))
|
|
.then(() => SimpleTest.finish());
|
|
|
|
</script>
|
|
</body>
|
|
</html>
|