diff -r 000000000000 -r 6474c204b198 webapprt/content/mochitest-shared.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/webapprt/content/mochitest-shared.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,89 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/* Note: this script is loaded by both mochitest.js and head.js, so make sure
+ * the code you put here can be evaluated by both! */
+
+Cu.import("resource://webapprt/modules/WebappRT.jsm");
+
+// When WebappsHandler opens an install confirmation dialog for apps we install,
+// close it, which will be seen as the equivalent of cancelling the install.
+// This doesn't prevent us from installing those apps, as we listen for the same
+// notification as WebappsHandler and do the install ourselves.  It just
+// prevents the modal installation confirmation dialogs from hanging tests.
+Services.ww.registerNotification({
+  observe: function(win, topic) {
+    if (topic == "domwindowopened") {
+      // Wait for load because the window is not yet sufficiently initialized.
+      win.addEventListener("load", function onLoadWindow() {
+        win.removeEventListener("load", onLoadWindow, false);
+        if (win.location == "chrome://global/content/commonDialog.xul" &&
+            win.opener == window) {
+          win.close();
+        }
+      }, false);
+    }
+  }
+});
+
+/**
+ * Transmogrify the runtime session into one for the given webapp.
+ *
+ * @param {String} manifestURL
+ *        The URL of the webapp's manifest, relative to the base URL.
+ *        Note that the base URL points to the *chrome* WebappRT mochitests,
+ *        so you must supply an absolute URL to manifests elsewhere.
+ * @param {Object} parameters
+ *        The value to pass as the "parameters" argument to
+ *        mozIDOMApplicationRegistry.install, e.g., { receipts: ... }.
+ *        Use undefined to pass nothing.
+ * @param {Function} onBecome
+ *        The callback to call once the transmogrification is complete.
+ */
+function becomeWebapp(manifestURL, parameters, onBecome) {
+  function observeInstall(subj, topic, data) {
+    Services.obs.removeObserver(observeInstall, "webapps-ask-install");
+
+    // Step 2: Configure the runtime session to represent the app.
+    // We load DOMApplicationRegistry into a local scope to avoid appearing
+    // to leak it.
+
+    let scope = {};
+    Cu.import("resource://gre/modules/Webapps.jsm", scope);
+    Cu.import("resource://webapprt/modules/Startup.jsm", scope);
+    scope.DOMApplicationRegistry.confirmInstall(JSON.parse(data));
+
+    let installRecord = JSON.parse(data);
+    installRecord.mm = subj;
+    installRecord.registryDir = Services.dirsvc.get("ProfD", Ci.nsIFile).path;
+    WebappRT.config = installRecord;
+
+    let win = Services.wm.getMostRecentWindow("webapprt:webapp");
+    if (!win) {
+      win = Services.ww.openWindow(null,
+                                   "chrome://webapprt/content/webapp.xul",
+                                   "_blank",
+                                   "chrome,dialog=no,resizable,scrollbars,centerscreen",
+                                   null);
+    }
+
+    let promise = scope.startup(win);
+
+    // During chrome tests, we use the same window to load all the tests. We
+    // need to change the buildID so that the permissions for the currently
+    // tested application get installed.
+    Services.prefs.setCharPref("webapprt.buildID", WebappRT.config.app.manifestURL);
+
+    // During tests, the webapps registry is already loaded.
+    // The Startup module needs to be notified when the webapps registry
+    // gets loaded, so we do that now.
+    Services.obs.notifyObservers(this, "webapps-registry-start", null);
+
+    promise.then(onBecome);
+  }
+  Services.obs.addObserver(observeInstall, "webapps-ask-install", false);
+
+  // Step 1: Install the app at the URL specified by the manifest.
+  navigator.mozApps.install(manifestURL, parameters);
+}