michael@0: /* Any copyright is dedicated to the Public Domain.
michael@0:  * http://creativecommons.org/publicdomain/zero/1.0/ */
michael@0: 
michael@0: "use strict";
michael@0: 
michael@0: const STATE = {
michael@0:   windows: [{
michael@0:     tabs: [{
michael@0:       entries: [{ url: "about:mozilla" }],
michael@0:       hidden: true,
michael@0:       extData: {"tabview-tab": '{"url":"about:mozilla","groupID":1}'}
michael@0:     },{
michael@0:       entries: [{ url: "about:robots" }],
michael@0:       hidden: false,
michael@0:       extData: {"tabview-tab": '{"url":"about:robots","groupID":1}'},
michael@0:     }],
michael@0:     selected: 1,
michael@0:     extData: {
michael@0:       "tabview-groups": '{"nextID":2,"activeGroupId":1, "totalNumber":1}',
michael@0:       "tabview-group":
michael@0:         '{"1":{"bounds":{"left":15,"top":5,"width":280,"height":232},"id":1}}'
michael@0:     }
michael@0:   }]
michael@0: };
michael@0: 
michael@0: /**
michael@0:  * Make sure that tabs are restored on demand as otherwise the tab will start
michael@0:  * loading immediately and we can't check whether it shows cached data.
michael@0:  */
michael@0: add_task(function setup() {
michael@0:   Services.prefs.setBoolPref("browser.sessionstore.restore_on_demand", true);
michael@0: 
michael@0:   registerCleanupFunction(() => {
michael@0:     Services.prefs.clearUserPref("browser.sessionstore.restore_on_demand");
michael@0:   });
michael@0: });
michael@0: 
michael@0: /**
michael@0:  * Ensure that a pending tab shows cached data.
michael@0:  */
michael@0: add_task(function () {
michael@0:   // Open a new window.
michael@0:   let win = OpenBrowserWindow();
michael@0:   yield promiseDelayedStartupFinished(win);
michael@0: 
michael@0:   // Set the window to a specific state.
michael@0:   let ss = Cc["@mozilla.org/browser/sessionstore;1"]
michael@0:              .getService(Ci.nsISessionStore)
michael@0:              .setWindowState(win, JSON.stringify(STATE), true);
michael@0: 
michael@0:   // Open Panorama.
michael@0:   yield promiseTabViewShown(win);
michael@0: 
michael@0:   let [tab1, tab2] = win.gBrowser.tabs;
michael@0:   let cw = win.TabView.getContentWindow();
michael@0: 
michael@0:   // Update the two tabs in reverse order. Panorama will first try to update
michael@0:   // the second tab but will put it back onto the queue once it detects that
michael@0:   // it hasn't loaded yet. It will then try to update the first tab.
michael@0:   cw.TabItems.update(tab2);
michael@0:   cw.TabItems.update(tab1);
michael@0: 
michael@0:   let tabItem1 = tab1._tabViewTabItem;
michael@0:   let tabItem2 = tab2._tabViewTabItem;
michael@0: 
michael@0:   // Wait for the first tabItem to be updated. Calling update() on the second
michael@0:   // tabItem won't send a notification as that is pushed back onto the queue.
michael@0:   yield promiseTabItemUpdated(tabItem1);
michael@0: 
michael@0:   // Check that the first tab doesn't show cached data, the second one does.
michael@0:   ok(!tabItem1.isShowingCachedData(), "doesn't show cached data");
michael@0:   ok(tabItem2.isShowingCachedData(), "shows cached data");
michael@0: 
michael@0:   // Cleanup.
michael@0:   yield promiseWindowClosed(win);
michael@0: });
michael@0: 
michael@0: function promiseTabItemUpdated(tabItem) {
michael@0:   let deferred = Promise.defer();
michael@0: 
michael@0:   tabItem.addSubscriber("updated", function onUpdated() {
michael@0:     tabItem.removeSubscriber("updated", onUpdated);
michael@0:     deferred.resolve();
michael@0:   });
michael@0: 
michael@0:   return deferred.promise;
michael@0: }
michael@0: 
michael@0: function promiseAllTabItemsUpdated(win) {
michael@0:   let deferred = Promise.defer();
michael@0:   afterAllTabItemsUpdated(deferred.resolve, win);
michael@0:   return deferred.promise;
michael@0: }
michael@0: 
michael@0: function promiseDelayedStartupFinished(win) {
michael@0:   let deferred = Promise.defer();
michael@0:   whenDelayedStartupFinished(win, deferred.resolve);
michael@0:   return deferred.promise;
michael@0: }
michael@0: 
michael@0: function promiseTabViewShown(win) {
michael@0:   let deferred = Promise.defer();
michael@0:   showTabView(deferred.resolve, win);
michael@0:   return deferred.promise;
michael@0: }
michael@0: 
michael@0: function promiseWindowClosed(win) {
michael@0:   let deferred = Promise.defer();
michael@0: 
michael@0:   Services.obs.addObserver(function obs(subject, topic) {
michael@0:     if (subject == win) {
michael@0:       Services.obs.removeObserver(obs, topic);
michael@0:       deferred.resolve();
michael@0:     }
michael@0:   }, "domwindowclosed", false);
michael@0: 
michael@0:   win.close();
michael@0:   return deferred.promise;
michael@0: }