mozilla-central/browser/components/sessionstore/test/browser_dying_cache.js (file symbol)

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Test Info: Warnings

"use strict";
/**
* 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.
*/
add_task(async function test() {
// Open a new window.
let win = await promiseNewWindowLoaded();
// Load some URL in the current tab.
let flags = Ci.nsIWebNavigation.LOAD_FLAGS_REPLACE_HISTORY;
BrowserTestUtils.startLoadingURIString(
win.gBrowser.selectedBrowser,
"about:robots",
{
flags,
}
);
await promiseBrowserLoaded(win.gBrowser.selectedBrowser);
// Open a second tab and close the first one.
let tab = BrowserTestUtils.addTab(win.gBrowser, "about:mozilla");
await promiseBrowserLoaded(tab.linkedBrowser);
await TabStateFlusher.flush(tab.linkedBrowser);
await promiseRemoveTabAndSessionState(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.setCustomWindowValue(win, "foo", "bar");
checkWindowState(win);
// Close our window.
await BrowserTestUtils.closeWindow(win);
// 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.
Assert.throws(
() => ss.setWindowState(win, {}),
/Window is not tracked/,
"we're not allowed to modify state data anymore"
);
Assert.throws(
() => ss.setCustomWindowValue(win, "foo", "baz"),
/Window is not tracked/,
"we're not allowed to modify state data anymore"
);
});
function checkWindowState(window) {
let {
windows: [{ tabs }],
} = 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.getClosedTabCountForWindow(window), 1, "the window has one closed tab");
let [
{
state: {
entries: [{ url }],
},
},
] = ss.getClosedTabDataForWindow(window);
is(url, "about:robots", "the closed tab is about:robots");
is(ss.getCustomWindowValue(window, "foo"), "bar", "correct extData value");
}
function shouldThrow(f) {
try {
f();
} catch (e) {
return true;
}
return null;
}