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Test Info: Errors
- This test failed 1 times in the preceding 30 days. quicksearch this test
- Manifest: browser/components/sessionstore/test/browser.toml
"use strict";
/**
* This test is for the sessionstore-closed-objects-changed notifications.
*/
const MAX_TABS_UNDO_PREF = "browser.sessionstore.max_tabs_undo";
const TOPIC = "sessionstore-closed-objects-changed";
let notificationsCount = 0;
async function openWindow(url) {
let win = await promiseNewWindowLoaded();
let flags = Ci.nsIWebNavigation.LOAD_FLAGS_REPLACE_HISTORY;
BrowserTestUtils.startLoadingURIString(win.gBrowser.selectedBrowser, url, {
flags,
});
await promiseBrowserLoaded(win.gBrowser.selectedBrowser, true, url);
return win;
}
async function closeWindow(win) {
await awaitNotification(() => BrowserTestUtils.closeWindow(win));
}
async function openAndCloseWindow(url) {
let win = await openWindow(url);
await closeWindow(win);
}
async function openTab(window, url) {
let tab = await BrowserTestUtils.openNewForegroundTab(window.gBrowser, url);
await TabStateFlusher.flush(tab.linkedBrowser);
return tab;
}
async function openAndCloseTab(window, url) {
let tab = await openTab(window, url);
await promiseRemoveTabAndSessionState(tab);
}
function countingObserver() {
notificationsCount++;
}
function assertNotificationCount(count) {
is(
notificationsCount,
count,
"The expected number of notifications was received."
);
}
async function awaitNotification(callback) {
let notification = TestUtils.topicObserved(TOPIC);
executeSoon(callback);
await notification;
}
add_task(async function test_closedObjectsChangedNotifications() {
// Create a closed window so that when we do the purge we can expect a notification.
await openAndCloseWindow("about:robots");
// Forget any previous closed windows or tabs from other tests that may have
// run in the same session.
await awaitNotification(() =>
Services.obs.notifyObservers(null, "browser:purge-session-history")
);
// Add an observer to count the number of notifications.
Services.obs.addObserver(countingObserver, TOPIC);
// Open a new window.
let win = await openWindow("about:robots");
info("Opening and closing a tab.");
await openAndCloseTab(win, "about:mozilla");
assertNotificationCount(1);
info("Opening and closing a second tab.");
await openAndCloseTab(win, "about:mozilla");
assertNotificationCount(2);
info(`Changing the ${MAX_TABS_UNDO_PREF} pref.`);
registerCleanupFunction(function () {
Services.prefs.clearUserPref(MAX_TABS_UNDO_PREF);
});
await awaitNotification(() =>
Services.prefs.setIntPref(MAX_TABS_UNDO_PREF, 1)
);
assertNotificationCount(3);
info("Undoing close of remaining closed tab.");
let tab = SessionStore.undoCloseTab(win, 0);
await promiseTabRestored(tab);
assertNotificationCount(4);
info("Closing tab again.");
await promiseRemoveTabAndSessionState(tab);
assertNotificationCount(5);
info("Purging session history.");
await awaitNotification(() =>
Services.obs.notifyObservers(null, "browser:purge-session-history")
);
assertNotificationCount(6);
info("Opening and closing another tab.");
assertNotificationCount(7);
info("Purging domain data with no matches.");
Services.obs.notifyObservers(
null,
"browser:purge-session-history-for-domain",
"mozilla.com"
);
assertNotificationCount(7);
info("Purging domain data with matches.");
await awaitNotification(() =>
Services.obs.notifyObservers(
null,
"browser:purge-session-history-for-domain",
"example.com"
)
);
assertNotificationCount(8);
info("Opening and closing another tab.");
assertNotificationCount(9);
await closeWindow(win);
assertNotificationCount(10);
Services.obs.removeObserver(countingObserver, TOPIC);
});