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<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8">
<title>Loading a page from BFCache and firing beforeunload on the current page</title>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<link rel="stylesheet" href="/tests/SimpleTest/test.css"/>
<script>
SimpleTest.waitForExplicitFinish();
/*
* This is a simple test to ensure beforeunload is fired on the current page
* when restoring a page from bfcache.
* (1) The controller page opens a new window. Another page is loaded there
* and session history is navigated back to check whether bfcache is
* enabled. If not, close message is sent and the opened window closes
* and the test ends.
* (2) beforeunload event listener is added to the page and history.forward()
* is called. The event listener should send a message to the controller
* page.
* (3) Close message is sent to close the opened window and the test finishes.
*/
var pageshowCount = 0;
var gotBeforeUnload = false;
var bfcacheDisabled = false;
function executeTest() {
var bc = new BroadcastChannel("beforeunload_and_bfcache");
bc.onmessage = function(event) {
if (event.data.type == "pageshow") {
++pageshowCount;
if (pageshowCount == 1) {
bc.postMessage("nextpage");
} else if (pageshowCount == 2) {
bc.postMessage("back");
} else if (pageshowCount == 3) {
if (!event.data.persisted) {
ok(true, "BFCache not enabled");
bfcacheDisabled = true;
bc.postMessage("close");
return;
}
bc.postMessage("forward");
} else if (pageshowCount == 4) {
ok(event.data.persisted, "Should have loaded a page from bfcache.");
bc.postMessage("close");
}
} else if (event.data == "beforeunload") {
gotBeforeUnload = true;
} else if (event.data == "closed") {
isnot(bfcacheDisabled, gotBeforeUnload,
"Either BFCache shouldn't be enabled or a beforeunload event should have been fired.");
bc.close();
SimpleTest.finish();
}
};
function runTest() {
SpecialPowers.pushPrefEnv({"set": [["docshell.shistory.bfcache.allow_unload_listeners", false]]},
function() {
window.open("file_beforeunload_and_bfcache.html", "", "noopener");
}
);
}
runTest();
}
if (isXOrigin) {
// Bug 1746646: Make mochitests work with TCP enabled (cookieBehavior = 5)
// Acquire storage access permission here so that the BroadcastChannel used to
// communicate with the opened windows works in xorigin tests. Otherwise,
// the iframe containing this page is isolated from first-party storage access,
// which isolates BroadcastChannel communication.
SpecialPowers.wrap(document).notifyUserGestureActivation();
SpecialPowers.addPermission("storageAccessAPI", true, window.location.href).then(() => {
SpecialPowers.wrap(document).requestStorageAccess().then(() => {
SpecialPowers.pushPrefEnv({
set: [["privacy.partition.always_partition_third_party_non_cookie_storage", false]]
}).then(() => {
executeTest();
});
});
});
} else {
executeTest();
}
</script>
</head>
<body>
<p id="display"></p>
<div id="content" style="display: none"></div>
<pre id="test"></pre>
</body>
</html>
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