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+<!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>