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Test Info:
- Manifest: docshell/test/navigation/mochitest.toml
<!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>