gecko/browser/components/sessionstore/test/browser_dying_cache.js

79 lines
2.5 KiB
JavaScript

/* Any copyright is dedicated to the Public Domain.
* http://creativecommons.org/publicdomain/zero/1.0/ */
function test() {
TestRunner.run();
}
/**
* This test ensures that after closing a window we keep its state data around
* as long as something keeps a reference to it. It should only be possible to
* read data after closing - writing should fail.
*/
function runTests() {
// Open a new window.
let win = OpenBrowserWindow();
yield whenWindowLoaded(win);
// Load some URL in the current tab.
win.gBrowser.selectedBrowser.loadURI("about:robots");
yield whenBrowserLoaded(win.gBrowser.selectedBrowser);
// Open a second tab and close the first one.
let tab = win.gBrowser.addTab("about:mozilla");
yield whenBrowserLoaded(tab.linkedBrowser);
win.gBrowser.removeTab(win.gBrowser.tabs[0]);
// Make sure our window is still tracked by sessionstore
// and the window state is as expected.
ok("__SSi" in win, "window is being tracked by sessionstore");
ss.setWindowValue(win, "foo", "bar");
checkWindowState(win);
let state = ss.getWindowState(win);
let closedTabData = ss.getClosedTabData(win);
// Close our window and wait a tick.
whenWindowClosed(win);
yield win.close();
// SessionStore should no longer track our window
// but it should still report the same state.
ok(!("__SSi" in win), "sessionstore does no longer track our window");
checkWindowState(win);
// Make sure we're not allowed to modify state data.
ok(shouldThrow(() => ss.setWindowState(win, {})),
"we're not allowed to modify state data anymore");
ok(shouldThrow(() => ss.setWindowValue(win, "foo", "baz")),
"we're not allowed to modify state data anymore");
}
function checkWindowState(window) {
let {windows: [{tabs}]} = JSON.parse(ss.getWindowState(window));
is(tabs.length, 1, "the window has a single tab");
is(tabs[0].entries[0].url, "about:mozilla", "the tab is about:mozilla");
is(ss.getClosedTabCount(window), 1, "the window has one closed tab");
let [{state: {entries: [{url}]}}] = JSON.parse(ss.getClosedTabData(window));
is(url, "about:robots", "the closed tab is about:robots");
is(ss.getWindowValue(window, "foo"), "bar", "correct extData value");
}
function shouldThrow(f) {
try {
f();
} catch (e) {
return true;
}
}
function whenWindowClosed(window) {
window.addEventListener("SSWindowClosing", function onClosing() {
window.removeEventListener("SSWindowClosing", onClosing);
executeSoon(next);
});
}