michael@0: /* Any copyright is dedicated to the Public Domain.
michael@0:    http://creativecommons.org/publicdomain/zero/1.0/ */
michael@0: 
michael@0: function test() {
michael@0:   waitForExplicitFinish();
michael@0: 
michael@0:   newWindowWithTabView(function (win) {
michael@0:     registerCleanupFunction(function () win.close());
michael@0: 
michael@0:     let cw = win.TabView.getContentWindow();
michael@0:     let tab = win.gBrowser.tabs[0];
michael@0:     let tabItem = tab._tabViewTabItem;
michael@0:     let isIdle = false;
michael@0: 
michael@0:     // We replace UI.isIdle() here to not rely on setTimeout(). While this
michael@0:     // function returns false (busy) we expect no tabItem updates to happen.
michael@0:     let busyCount = 5;
michael@0:     cw.UI.isIdle = function () {
michael@0:       return isIdle = (0 > --busyCount);
michael@0:     };
michael@0: 
michael@0:     cw.TabItems.pausePainting();
michael@0: 
michael@0:     tabItem.addSubscriber("updated", function onUpdated() {
michael@0:       tabItem.removeSubscriber("updated", onUpdated);
michael@0:       ok(isIdle, "tabItem is updated only when UI is idle");
michael@0:       finish();
michael@0:     });
michael@0: 
michael@0:     cw.TabItems.update(tab);
michael@0:     cw.TabItems.resumePainting();
michael@0:   });
michael@0: }