<!
DOCTYPE HTML>
<
html>
<
head>
<
meta charset=
"utf-8">
<
title>Evict a page from bfcache</
title>
<
script src=
"/tests/SimpleTest/SimpleTest.js"></
script>
<
link rel=
"stylesheet" href=
"/tests/SimpleTest/test.css"/>
<
script defer>
/*
* This test checks that a page can be evicted from bfcache. Sending a
* message to an open BroadcastChannel is used for this.
*
* First the test opens a window and loads a page there. Another page is then
* loaded and then session history is navigated back to check if bfcache is
* enabled. If not, close message is sent to close the opened window and this
* controller page will finish the test.
* If bfcache is enabled, session history goes forward, but the
* BroadcastChannel in the page isn
't closed. Then sending the message to go
* back again should evict the bfcached page.
* Close message is sent and window closed and test finishes.
*/
SimpleTest.waitForExplicitFinish();
SimpleTest.enableLegacyUnpartitionedStorage().then( () => {
var bc = new BroadcastChannel(
"evict_from_bfcache");
var pageshowCount = 0;
bc.onmessage = function(event) {
if (event.data.type ==
"pageshow") {
++pageshowCount;
info(
"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 isn't enabled.");
bc.postMessage(
"close");
} else {
bc.postMessage(
"forward");
}
} else if (pageshowCount == 4) {
bc.postMessage(
"back");
} else if (pageshowCount == 5) {
ok(!event.data.persisted,
"The page should have been evicted from BFCache");
bc.postMessage(
"close");
}
} else if (event.data ==
"closed") {
SimpleTest.finish();
}
}
window.open(
"file_evict_from_bfcache.html",
"",
"noopener");
});
</
script>
</
head>
<
body>
<p id=
"display"></p>
<
div id=
"content" style=
"display: none"></
div>
<
pre id=
"test"></
pre>
</
body>
</
html>
