support for testing on safari

www/common/boot2.js

@@ -22,6 +22,24 @@ define([
     }
 
     var failStore = function () {
+        if (document.cookie.indexOf('test=') === 0) {
+            // We're testing in safari and safaridriver runs everything in a private window
+            // However, for our tests nothing lasts more than a single page load so we can
+            // stub the localStorage
+
+            // This is shamelessly copy/pasted from sframe-boot2.js :(
+            var mkFakeStore = function () {
+                var fakeStorage = {
+                    getItem: function (k) { return fakeStorage[k]; },
+                    setItem: function (k, v) { fakeStorage[k] = v; return v; },
+                    removeItem: function (k) { delete fakeStorage[k]; }
+                };
+                return fakeStorage;
+            };
+            window.__defineGetter__('localStorage', function () { return mkFakeStore(); });
+            window.__defineGetter__('sessionStorage', function () { return mkFakeStore(); });
+            return;
+        }
         console.error(new Error('wut'));
         require(['jquery'], function ($) {
             $.ajax({