michael@0: /* Any copyright is dedicated to the Public Domain.
michael@0:  * http://creativecommons.org/publicdomain/zero/1.0/ */
michael@0: 
michael@0: const URL = "about:robots";
michael@0: 
michael@0: function test() {
michael@0:   let win;
michael@0: 
michael@0:   let listener = {
michael@0:     onLocationChange: (webProgress, request, uri, flags) => {
michael@0:       ok(webProgress.isTopLevel, "Received onLocationChange from top frame");
michael@0:       is(uri.spec, URL, "Received onLocationChange for correct URL");
michael@0:       finish();
michael@0:     }
michael@0:   };
michael@0: 
michael@0:   waitForExplicitFinish();
michael@0: 
michael@0:   // Remove the listener and window when we're done.
michael@0:   registerCleanupFunction(() => {
michael@0:     win.gBrowser.removeProgressListener(listener);
michael@0:     win.close();
michael@0:   });
michael@0: 
michael@0:   // Wait for the newly opened window.
michael@0:   whenNewWindowOpened(w => win = w);
michael@0: 
michael@0:   // Open a link in a new window.
michael@0:   openLinkIn(URL, "window", {});
michael@0: 
michael@0:   // On the next tick, but before the window has finished loading, access the
michael@0:   // window's gBrowser property to force the tabbrowser constructor early.
michael@0:   (function tryAddProgressListener() {
michael@0:     executeSoon(() => {
michael@0:       try {
michael@0:         win.gBrowser.addProgressListener(listener);
michael@0:       } catch (e) {
michael@0:         // win.gBrowser wasn't ready, yet. Try again in a tick.
michael@0:         tryAddProgressListener();
michael@0:       }
michael@0:     });
michael@0:   })();
michael@0: }
michael@0: 
michael@0: function whenNewWindowOpened(cb) {
michael@0:   Services.obs.addObserver(function obs(win) {
michael@0:     Services.obs.removeObserver(obs, "domwindowopened");
michael@0:     cb(win);
michael@0:   }, "domwindowopened", false);
michael@0: }