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Test Info:
/* Any copyright is dedicated to the Public Domain.
const TEST_URL =
"sessionstore/test/browser_637020_slow.sjs";
const TEST_STATE = {
windows: [
{
tabs: [
{ entries: [{ url: "about:mozilla", triggeringPrincipal_base64 }] },
{ entries: [{ url: "about:robots", triggeringPrincipal_base64 }] },
],
},
{
tabs: [
{ entries: [{ url: TEST_URL, triggeringPrincipal_base64 }] },
{ entries: [{ url: TEST_URL, triggeringPrincipal_base64 }] },
],
},
],
};
/**
* This test ensures that windows that have just been restored will be marked
* as dirty, otherwise _getCurrentState() might ignore them when collecting
* state for the first time and we'd just save them as empty objects.
*
* The dirty state acts as a cache to not collect data from all windows all the
* time, so at the beginning, each window must be dirty so that we collect
* their state at least once.
*/
add_task(async function test() {
// Wait until the new window has been opened.
let promiseWindow = new Promise(resolve => {
Services.obs.addObserver(function onOpened(subject) {
Services.obs.removeObserver(onOpened, "domwindowopened");
resolve(subject);
}, "domwindowopened");
});
// Set the new browser state that will
// restore a window with two slowly loading tabs.
let backupState = SessionStore.getBrowserState();
SessionStore.setBrowserState(JSON.stringify(TEST_STATE));
let win = await promiseWindow;
let restoring = promiseWindowRestoring(win);
let restored = promiseWindowRestored(win);
await restoring;
await restored;
// The window has now been opened. Check the state that is returned,
// this should come from the cache while the window isn't restored, yet.
info("the window has been opened");
checkWindows();
// The history has now been restored and the tabs are loading. The data must
// now come from the window, if it's correctly been marked as dirty before.
await new Promise(resolve => whenDelayedStartupFinished(win, resolve));
info("the delayed startup has finished");
checkWindows();
// Cleanup.
await BrowserTestUtils.closeWindow(win);
await promiseBrowserState(backupState);
});
function checkWindows() {
let state = JSON.parse(SessionStore.getBrowserState());
is(state.windows[0].tabs.length, 2, "first window has two tabs");
is(state.windows[1].tabs.length, 2, "second window has two tabs");
}