diff -r 000000000000 -r 6474c204b198 browser/devtools/tilt/test/browser_tilt_02_notifications.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/devtools/tilt/test/browser_tilt_02_notifications.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,133 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+"use strict";
+
+let tab0, tab1;
+let testStep = -1;
+let tabEvents = "";
+
+function test() {
+  if (!isTiltEnabled()) {
+    info("Skipping notifications test because Tilt isn't enabled.");
+    return;
+  }
+  if (!isWebGLSupported()) {
+    info("Skipping notifications test because WebGL isn't supported.");
+    return;
+  }
+
+  requestLongerTimeout(10);
+  waitForExplicitFinish();
+
+  gBrowser.tabContainer.addEventListener("TabSelect", tabSelect, false);
+  createNewTab();
+}
+
+function createNewTab() {
+  tab0 = gBrowser.selectedTab;
+
+  tab1 = createTab(function() {
+    Services.obs.addObserver(finalize, DESTROYED, false);
+    Services.obs.addObserver(tab_STARTUP, STARTUP, false);
+    Services.obs.addObserver(tab_INITIALIZING, INITIALIZING, false);
+    Services.obs.addObserver(tab_DESTROYING, DESTROYING, false);
+    Services.obs.addObserver(tab_SHOWN, SHOWN, false);
+    Services.obs.addObserver(tab_HIDDEN, HIDDEN, false);
+
+    info("Starting up the Tilt notifications test.");
+    createTilt({
+      onTiltOpen: function()
+      {
+        testStep = 0;
+        tabSelect();
+      }
+    }, false, function suddenDeath()
+    {
+      info("Tilt could not be initialized properly.");
+      cleanup();
+    });
+  });
+}
+
+function tab_STARTUP(win) {
+  info("Handling the STARTUP notification.");
+  is(win, tab1.linkedBrowser.contentWindow, "Saw the correct window");
+  tabEvents += "STARTUP;";
+}
+
+function tab_INITIALIZING(win) {
+  info("Handling the INITIALIZING notification.");
+  is(win, tab1.linkedBrowser.contentWindow, "Saw the correct window");
+  tabEvents += "INITIALIZING;";
+}
+
+function tab_DESTROYING(win) {
+  info("Handling the DESTROYING notification.");
+  is(win, tab1.linkedBrowser.contentWindow, "Saw the correct window");
+  tabEvents += "DESTROYING;";
+}
+
+function tab_SHOWN(win) {
+  info("Handling the SHOWN notification.");
+  is(win, tab1.linkedBrowser.contentWindow, "Saw the correct window");
+  tabEvents += "SHOWN;";
+}
+
+function tab_HIDDEN(win) {
+  info("Handling the HIDDEN notification.");
+  is(win, tab1.linkedBrowser.contentWindow, "Saw the correct window");
+  tabEvents += "HIDDEN;";
+}
+
+let testSteps = [
+  function step0() {
+    info("Selecting tab0.");
+    gBrowser.selectedTab = tab0;
+  },
+  function step1() {
+    info("Selecting tab1.");
+    gBrowser.selectedTab = tab1;
+  },
+  function step2() {
+    info("Killing it.");
+    Tilt.destroy(Tilt.currentWindowId, true);
+  }
+];
+
+function finalize(win) {
+  if (!tabEvents) {
+    return;
+  }
+
+  is(win, tab1.linkedBrowser.contentWindow, "Saw the correct window");
+
+  is(tabEvents, "STARTUP;INITIALIZING;HIDDEN;SHOWN;DESTROYING;",
+    "The notifications weren't fired in the correct order.");
+
+  cleanup();
+}
+
+function cleanup() {
+  info("Cleaning up the notifications test.");
+
+  tab0 = null;
+  tab1 = null;
+
+  Services.obs.removeObserver(finalize, DESTROYED);
+  Services.obs.removeObserver(tab_INITIALIZING, INITIALIZING);
+  Services.obs.removeObserver(tab_DESTROYING, DESTROYING);
+  Services.obs.removeObserver(tab_SHOWN, SHOWN);
+  Services.obs.removeObserver(tab_HIDDEN, HIDDEN);
+  Services.obs.removeObserver(tab_STARTUP, STARTUP);
+
+  gBrowser.tabContainer.removeEventListener("TabSelect", tabSelect);
+  gBrowser.removeCurrentTab();
+  finish();
+}
+
+function tabSelect() {
+  if (testStep !== -1) {
+    executeSoon(testSteps[testStep]);
+    testStep++;
+  }
+}