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Test Info:
"use strict";
function countHistoryEntries(browser, expected) {
return SpecialPowers.spawn(browser, [{ expected }], async function (args) {
let webNavigation = docShell.QueryInterface(Ci.nsIWebNavigation);
let history = webNavigation.sessionHistory;
Assert.equal(
history && history.count,
args.expected,
"correct number of shistory entries"
);
});
}
add_task(async function () {
// Open a new window.
let win = await promiseNewWindowLoaded();
// Add a new tab.
let tab = BrowserTestUtils.addTab(win.gBrowser, "about:blank");
let browser = tab.linkedBrowser;
await promiseBrowserLoaded(browser);
ok(browser.isRemoteBrowser, "browser is remote");
// Get the maximum number of preceding entries to save.
const MAX_BACK = Services.prefs.getIntPref(
"browser.sessionstore.max_serialize_back"
);
Assert.greater(
MAX_BACK,
-1,
"check that the default has a value that caps data"
);
// Load more pages than we would save to disk on a clean shutdown.
for (let i = 0; i < MAX_BACK + 2; i++) {
BrowserTestUtils.startLoadingURIString(browser, URL + i);
await promiseBrowserLoaded(browser);
ok(browser.isRemoteBrowser, "browser is still remote");
}
// Check we have the right number of shistory entries.
await countHistoryEntries(browser, MAX_BACK + 2);
// Load a non-remote page.
BrowserTestUtils.startLoadingURIString(browser, "about:robots");
await promiseBrowserLoaded(browser);
ok(!browser.isRemoteBrowser, "browser is not remote anymore");
// Check that we didn't lose any shistory entries.
await countHistoryEntries(browser, MAX_BACK + 3);
// Cleanup.
await BrowserTestUtils.closeWindow(win);
});