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:   Task.spawn(function task() {
michael@0:     let tab = gBrowser.selectedTab = gBrowser.addTab("about:mozilla");
michael@0:     yield promiseBrowserLoaded(gBrowser.selectedBrowser);
michael@0: 
michael@0:     let win = gBrowser.replaceTabWithWindow(tab);
michael@0:     yield promiseDelayedStartupFinished(win);
michael@0:     yield promiseBrowserHasURL(win.gBrowser.browsers[0], "about:mozilla");
michael@0: 
michael@0:     win.duplicateTabIn(win.gBrowser.selectedTab, "tab");
michael@0:     let browser = win.gBrowser.browsers[1];
michael@0:     yield promiseBrowserLoaded(browser);
michael@0:     is(browser.currentURI.spec, "about:mozilla", "tab was duplicated");
michael@0: 
michael@0:     win.close();
michael@0:   }).then(finish);
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 promiseBrowserHasURL(browser, url) {
michael@0:   let promise = Promise.resolve();
michael@0: 
michael@0:   if (browser.contentDocument.readyState === "complete" &&
michael@0:       browser.currentURI.spec === url) {
michael@0:     return promise;
michael@0:   }
michael@0: 
michael@0:   return promise.then(() => promiseBrowserHasURL(browser, url));
michael@0: }