diff -r 000000000000 -r 6474c204b198 browser/devtools/styleeditor/test/head.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/devtools/styleeditor/test/head.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,122 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+const TEST_BASE = "chrome://mochitests/content/browser/browser/devtools/styleeditor/test/";
+const TEST_BASE_HTTP = "http://example.com/browser/browser/devtools/styleeditor/test/";
+const TEST_BASE_HTTPS = "https://example.com/browser/browser/devtools/styleeditor/test/";
+const TEST_HOST = 'mochi.test:8888';
+
+let {devtools} = Cu.import("resource://gre/modules/devtools/Loader.jsm", {});
+let TargetFactory = devtools.TargetFactory;
+let {LoadContextInfo} = Cu.import("resource://gre/modules/LoadContextInfo.jsm", {});
+let {console} = Cu.import("resource://gre/modules/devtools/Console.jsm", {});
+let {Promise: promise} = Cu.import("resource://gre/modules/Promise.jsm", {});
+
+let gPanelWindow;
+let cache = Cc["@mozilla.org/netwerk/cache-storage-service;1"]
+              .getService(Ci.nsICacheStorageService);
+
+
+// Import the GCLI test helper
+let testDir = gTestPath.substr(0, gTestPath.lastIndexOf("/"));
+Services.scriptloader.loadSubScript(testDir + "../../../commandline/test/helpers.js", this);
+
+gDevTools.testing = true;
+SimpleTest.registerCleanupFunction(() => {
+  gDevTools.testing = false;
+});
+
+/**
+ * Define an async test based on a generator function
+ */
+function asyncTest(generator) {
+  return () => Task.spawn(generator).then(null, ok.bind(null, false)).then(finish);
+}
+
+function* cleanup()
+{
+  gPanelWindow = null;
+  while (gBrowser.tabs.length > 1) {
+    let target = TargetFactory.forTab(gBrowser.selectedTab);
+    yield gDevTools.closeToolbox(target);
+
+    gBrowser.removeCurrentTab();
+  }
+}
+
+function addTabAndOpenStyleEditors(count, callback, uri) {
+  let deferred = promise.defer();
+  let currentCount = 0;
+  let panel;
+  addTabAndCheckOnStyleEditorAdded(p => panel = p, function () {
+    currentCount++;
+    info(currentCount + " of " + count + " editors opened");
+    if (currentCount == count) {
+      if (callback) {
+        callback(panel);
+      }
+      deferred.resolve(panel);
+    }
+  });
+
+  if (uri) {
+    content.location = uri;
+  }
+  return deferred.promise;
+}
+
+function addTabAndCheckOnStyleEditorAdded(callbackOnce, callbackOnAdded) {
+  gBrowser.selectedTab = gBrowser.addTab();
+  gBrowser.selectedBrowser.addEventListener("load", function onLoad() {
+    gBrowser.selectedBrowser.removeEventListener("load", onLoad, true);
+    openStyleEditorInWindow(window, function (panel) {
+      // Execute the individual callback with the panel argument.
+      callbackOnce(panel);
+      // Report editors that already opened while loading.
+      for (let editor of panel.UI.editors) {
+        callbackOnAdded(editor);
+      }
+      // Report new editors added afterwards.
+      panel.UI.on("editor-added", (event, editor) => callbackOnAdded(editor));
+    });
+  }, true);
+}
+
+function openStyleEditorInWindow(win, callback) {
+  let target = TargetFactory.forTab(win.gBrowser.selectedTab);
+  win.gDevTools.showToolbox(target, "styleeditor").then(function(toolbox) {
+    let panel = toolbox.getCurrentPanel();
+    gPanelWindow = panel._panelWin;
+
+    panel.UI._alwaysDisableAnimations = true;
+    callback(panel);
+  });
+}
+
+function checkDiskCacheFor(host, done)
+{
+  let foundPrivateData = false;
+
+  Visitor.prototype = {
+    onCacheStorageInfo: function(num, consumption)
+    {
+      info("disk storage contains " + num + " entries");
+    },
+    onCacheEntryInfo: function(entry)
+    {
+      info(entry.key);
+      foundPrivateData |= entry.key.contains(host);
+    },
+    onCacheEntryVisitCompleted: function()
+    {
+      is(foundPrivateData, false, "web content present in disk cache");
+      done();
+    }
+  };
+  function Visitor() {}
+
+  var storage = cache.diskCacheStorage(LoadContextInfo.default, false);
+  storage.asyncVisitStorage(new Visitor(), true /* Do walk entries */);
+}
+
+registerCleanupFunction(cleanup);