Bug 1322726 - add UITour API to support opening about:newtab in the current tab, r=MattN

When running the tests by dir, I noticed the tracking protection test requires extra
files to work, but don't list those, so I fixed that.

MozReview-Commit-ID: FUi8XQImvbI

--HG--
extra : rebase_source : 22cda58541764b624b9d75fbe0fd76275203aa18

browser/components/uitour/UITour-lib.js

@@ -220,6 +220,10 @@ if (typeof Mozilla == 'undefined') {
     });
   };
 
+  Mozilla.UITour.showNewTab = function() {
+    _sendEvent('showNewTab');
+  };
+
   Mozilla.UITour.getConfiguration = function(configName, callback) {
     _sendEvent('getConfiguration', {
       callbackID: _waitForCallback(callback),

browser/components/uitour/UITour.jsm

@@ -527,6 +527,11 @@ this.UITour = {
         break;
       }
 
+      case "showNewTab": {
+        this.showNewTab(window, browser);
+        break;
+      }
+
       case "getConfiguration": {
         if (typeof data.configuration != "string") {
           log.warn("getConfiguration: No configuration option specified");
@@ -1744,6 +1749,10 @@ this.UITour = {
     }
   },
 
+  showNewTab: function(aWindow, aBrowser) {
+    aWindow.openLinkIn("about:newtab", "current", {targetBrowser: aBrowser});
+  },
+
   hideAnnotationsForPanel: function(aEvent, aTargetPositionCallback) {
     let win = aEvent.target.ownerGlobal;
     let annotationElements = new Map([

browser/components/uitour/test/browser.ini

@@ -16,6 +16,9 @@ skip-if = true # Bug 1113038 - Intermittent "Popup was opened"
 [browser_trackingProtection.js]
 skip-if = os == "linux" # Intermittent NS_ERROR_NOT_AVAILABLE [nsIUrlClassifierDBService.beginUpdate]
 tag = trackingprotection
+support-files =
+  !/browser/base/content/test/general/benignPage.html
+  !/browser/base/content/test/general/trackingPage.html
 [browser_trackingProtection_tour.js]
 tag = trackingprotection
 [browser_showMenu_controlCenter.js]
@@ -41,5 +44,6 @@ skip-if = true # Disabled due to frequent failures, bugs 1026310 and 1032137
 skip-if = true # Disabled pending removal of pocket UI Tour
 [browser_UITour_registerPageID.js]
 [browser_UITour_resetProfile.js]
+[browser_UITour_showNewTab.js]
 [browser_UITour_sync.js]
 [browser_UITour_toggleReaderMode.js]

browser/components/uitour/test/browser_UITour_showNewTab.js

@@ -0,0 +1,17 @@
+"use strict";
+
+var gTestTab;
+var gContentAPI;
+var gContentWindow;
+
+add_task(setup_UITourTest);
+
+// Test that we can switch to about:newtab
+add_UITour_task(function* test_aboutNewTab() {
+  let newTabLoaded = BrowserTestUtils.browserLoaded(gBrowser.selectedBrowser, false, "about:newtab");
+  info("Showing about:newtab");
+  yield gContentAPI.showNewTab();
+  info("Waiting for about:newtab to load");
+  yield newTabLoaded;
+  is(gBrowser.selectedBrowser.currentURI.spec, "about:newtab", "Loaded about:newtab");
+});