diff -r 000000000000 -r 6474c204b198 browser/devtools/tilt/test/browser_tilt_02_notifications-tabs.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/devtools/tilt/test/browser_tilt_02_notifications-tabs.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,173 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+"use strict";
+
+let tab0, tab1, tab2;
+let testStep = -1;
+
+let expected = [];
+function expect(notification, win) {
+  expected.push({ notification: notification, window: win });
+}
+
+function notification(win, topic) {
+  if (expected.length == 0) {
+    is(topic, null, "Shouldn't see a notification");
+    return;
+  }
+
+  let { notification, window } = expected.shift();
+  is(topic, notification, "Saw the expected notification");
+  is(win, window, "Saw the expected window");
+}
+
+function after(notification, callback) {
+  function observer() {
+    Services.obs.removeObserver(observer, notification);
+    executeSoon(callback);
+  }
+  Services.obs.addObserver(observer, notification, false);
+}
+
+function test() {
+  if (!isTiltEnabled()) {
+    info("Skipping tab switch test because Tilt isn't enabled.");
+    return;
+  }
+  if (!isWebGLSupported()) {
+    info("Skipping tab switch test because WebGL isn't supported.");
+    return;
+  }
+
+  Services.obs.addObserver(notification, STARTUP, false);
+  Services.obs.addObserver(notification, INITIALIZING, false);
+  Services.obs.addObserver(notification, INITIALIZED, false);
+  Services.obs.addObserver(notification, DESTROYING, false);
+  Services.obs.addObserver(notification, BEFORE_DESTROYED, false);
+  Services.obs.addObserver(notification, DESTROYED, false);
+  Services.obs.addObserver(notification, SHOWN, false);
+  Services.obs.addObserver(notification, HIDDEN, false);
+
+  waitForExplicitFinish();
+
+  tab0 = gBrowser.selectedTab;
+  nextStep();
+}
+
+function createTab2() {
+}
+
+let testSteps = [
+  function step0() {
+    tab1 = createTab(function() {
+      expect(STARTUP, tab1.linkedBrowser.contentWindow);
+      expect(INITIALIZING, tab1.linkedBrowser.contentWindow);
+      expect(INITIALIZED, tab1.linkedBrowser.contentWindow);
+      after(INITIALIZED, nextStep);
+
+      createTilt({}, false, function suddenDeath()
+      {
+        info("Tilt could not be initialized properly.");
+        cleanup();
+      });
+    });
+  },
+  function step1() {
+    expect(HIDDEN, tab1.linkedBrowser.contentWindow);
+
+    tab2 = createTab(function() {
+      expect(STARTUP, tab2.linkedBrowser.contentWindow);
+      expect(INITIALIZING, tab2.linkedBrowser.contentWindow);
+      expect(INITIALIZED, tab2.linkedBrowser.contentWindow);
+      after(INITIALIZED, nextStep);
+
+      createTilt({}, false, function suddenDeath()
+      {
+        info("Tilt could not be initialized properly.");
+        cleanup();
+      });
+    });
+  },
+  function step2() {
+    expect(HIDDEN, tab2.linkedBrowser.contentWindow);
+    after(HIDDEN, nextStep);
+
+    gBrowser.selectedTab = tab0;
+  },
+  function step3() {
+    expect(SHOWN, tab2.linkedBrowser.contentWindow);
+    after(SHOWN, nextStep);
+
+    gBrowser.selectedTab = tab2;
+  },
+  function step4() {
+    expect(HIDDEN, tab2.linkedBrowser.contentWindow);
+    expect(SHOWN, tab1.linkedBrowser.contentWindow);
+    after(SHOWN, nextStep);
+
+    gBrowser.selectedTab = tab1;
+  },
+  function step5() {
+    expect(HIDDEN, tab1.linkedBrowser.contentWindow);
+    expect(SHOWN, tab2.linkedBrowser.contentWindow);
+    after(SHOWN, nextStep);
+
+    gBrowser.selectedTab = tab2;
+  },
+  function step6() {
+    expect(DESTROYING, tab2.linkedBrowser.contentWindow);
+    expect(BEFORE_DESTROYED, tab2.linkedBrowser.contentWindow);
+    expect(DESTROYED, tab2.linkedBrowser.contentWindow);
+    after(DESTROYED, nextStep);
+
+    Tilt.destroy(Tilt.currentWindowId, true);
+  },
+  function step7() {
+    expect(SHOWN, tab1.linkedBrowser.contentWindow);
+
+    gBrowser.removeCurrentTab();
+    tab2 = null;
+
+    expect(DESTROYING, tab1.linkedBrowser.contentWindow);
+    expect(HIDDEN, tab1.linkedBrowser.contentWindow);
+    expect(BEFORE_DESTROYED, tab1.linkedBrowser.contentWindow);
+    expect(DESTROYED, tab1.linkedBrowser.contentWindow);
+    after(DESTROYED, nextStep);
+
+    gBrowser.removeCurrentTab();
+    tab1 = null;
+  },
+  function step8_cleanup() {
+    is(gBrowser.selectedTab, tab0, "Should be back to the first tab");
+
+    cleanup();
+  }
+];
+
+function cleanup() {
+  if (tab1) {
+    gBrowser.removeTab(tab1);
+    tab1 = null;
+  }
+  if (tab2) {
+    gBrowser.removeTab(tab2);
+    tab2 = null;
+  }
+
+  Services.obs.removeObserver(notification, STARTUP);
+  Services.obs.removeObserver(notification, INITIALIZING);
+  Services.obs.removeObserver(notification, INITIALIZED);
+  Services.obs.removeObserver(notification, DESTROYING);
+  Services.obs.removeObserver(notification, BEFORE_DESTROYED);
+  Services.obs.removeObserver(notification, DESTROYED);
+  Services.obs.removeObserver(notification, SHOWN);
+  Services.obs.removeObserver(notification, HIDDEN);
+
+  finish();
+}
+
+function nextStep() {
+  let step = testSteps.shift();
+  info("Executing " + step.name);
+  step();
+}