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<!DOCTYPE HTML>
<html>
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=580313
-->
<head>
<title>Test Prefetch (bug 580313)</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=580313">Mozilla Bug 580313</a>
<p id="display"></p>
<div id="content" style="display: none">
</div>
<pre id="test">
<script type="application/javascript">
SimpleTest.waitForExplicitFinish();
var prefetch = SpecialPowers.Cc["@mozilla.org/prefetch-service;1"].
getService(SpecialPowers.Ci.nsIPrefetchService);
var ios = SpecialPowers.Cc["@mozilla.org/network/io-service;1"].
getService(SpecialPowers.Ci.nsIIOService);
is(prefetch.hasMoreElements(), false, "No prefetches at the test start.");
var linkElem = document.createElement('link');
linkElem.rel = "prefetch";
// Href is empty.
document.head.appendChild(linkElem);
is(prefetch.hasMoreElements(), false,
"If href is not a valid uri, a prefetch has not been started.");
// Change uri of an existing link. Now it is a valid uri and
// a prefetch should start.
linkElem.href = "https://example.com/1";
is(prefetch.hasMoreElements(), true,
"Setting the href to a valid uri has started a new prefetch.");
// Removing a link, removes its prefetch.
document.head.removeChild(linkElem);
is(prefetch.hasMoreElements(), false,
"Removing the link has canceled the prefetch.");
// Add link again.
document.head.appendChild(linkElem);
is(prefetch.hasMoreElements(), true,
"Adding link again, has started the prefetch again.");
// Changing the href should cancel the current prefetch.
linkElem.href = "https://example.com/2";
is(prefetch.hasMoreElements(), true,
"Changing href, a new prefetch has been started.");
// To check if "https://example.com/1" prefetch has been canceled, we try to
// cancel it using PrefetService. Since the prefetch for
// "https://example.com/1" does not exist, the cancel will throw.
var cancelError = 0;
try {
var uri = ios.newURI("https://example.com/1");
prefetch.cancelPrefetchPreloadURI(uri, linkElem);
} catch(e) {
cancelError = 1;
}
is(cancelError, 1, "This prefetch has aleady been canceled");
// Now cancel the right uri.
cancelError = 0;
try {
var uri = ios.newURI("https://example.com/2");
prefetch.cancelPrefetchPreloadURI(uri, linkElem);
} catch(e) {
cancelError = 1;
}
is(cancelError, 0, "This prefetch has been canceled successfully");
is(prefetch.hasMoreElements(), false, "The prefetch has already been canceled.");
// Removing the link will do nothing regarding prefetch service.
document.head.removeChild(linkElem);
// Adding two links to the same uri and removing one will not remove the other.
document.head.appendChild(linkElem);
is(prefetch.hasMoreElements(), true,
"Added one prefetch for 'https://example.com/2'.");
var linkElem2 = document.createElement('link');
linkElem2.rel = "prefetch";
linkElem2.href = "https://example.com/2";
document.head.appendChild(linkElem2);
is(prefetch.hasMoreElements(), true,
"Added second prefetch for 'https://example.com/2'.");
// Remove first link element. This should not remove the prefetch.
document.head.removeChild(linkElem);
is(prefetch.hasMoreElements(), true,
"The prefetch for 'https://example.com/2' is still present.");
// Remove the second link element. This should remove the prefetch.
document.head.removeChild(linkElem2);
is(prefetch.hasMoreElements(), false,
"There is no prefetch.");
SimpleTest.finish();
</script>
</pre>
</body>
</html>
|
