mozilla-central/docshell/test/mochitest/test_bug1741132.html

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Test Info: Warnings

<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8">
<title>Test form restoration for no-store pages</title>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<link rel="stylesheet" href="/tests/SimpleTest/test.css"/>
<script>
// The number of entries which we keep in the BFCache (see nsSHistory.h).
const VIEWER_WINDOW = 3;
SimpleTest.waitForExplicitFinish();
function runTest() {
let bc = new BroadcastChannel("bug1741132");
// Setting the pref to 0 should evict all content viewers.
let load = SpecialPowers.pushPrefEnv({
set: [["browser.sessionhistory.max_total_viewers", 0]],
}).then(() => {
// Set the pref to VIEWER_WINDOW + 2 now, to be sure we
// could fit all entries.
SpecialPowers.pushPrefEnv({
set: [["browser.sessionhistory.max_total_viewers", VIEWER_WINDOW + 2]],
});
}).then(() => {
return new Promise(resolve => {
bc.addEventListener("message", resolve, { once: true });
window.open("file_bug1741132.html", "", "noopener");
});
});
// We want to try to keep one entry too many in the BFCache,
// so we ensure that there's at least VIEWER_WINDOW + 2
// entries in session history (with one for the displayed
// page).
for (let i = 0; i < VIEWER_WINDOW + 2; ++i) {
load = load.then(() => {
return new Promise((resolve) => {
bc.addEventListener("message", resolve, { once: true });
bc.postMessage({ cmd: "load", arg: `file_bug1741132.html?${i}` });
});
});
}
load.then(() => {
return new Promise((resolve) => {
bc.addEventListener("message", ({ data: persisted }) => {
resolve(persisted);
}, { once: true });
// Go back past the first entry that should be in the BFCache.
bc.postMessage({ cmd: "go", arg: -(VIEWER_WINDOW + 1) });
});
}).then((persisted) => {
ok(!persisted, "Only 3 pages should be kept in the BFCache");
}).then(() => {
return new Promise((resolve) => {
bc.addEventListener("message", ({ data: persisted }) => {
resolve(persisted);
}, { once: true });
// Go forward to the first entry that should be in the BFCache.
bc.postMessage({ cmd: "go", arg: 1 });
});
}).then((persisted) => {
ok(persisted, "3 pages should be kept in the BFCache");
bc.postMessage("close");
bc.close();
SimpleTest.finish();
});
}
</script>
</head>
<body onload="runTest();">
<p id="display"></p>
<div id="content" style="display: none"></div>
<pre id="test"></pre>
</body>
</html>