diff -r 000000000000 -r 6474c204b198 browser/devtools/framework/test/browser_toolbox_tabsswitch_shortcuts.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/devtools/framework/test/browser_toolbox_tabsswitch_shortcuts.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,93 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+let Toolbox = devtools.Toolbox;
+
+let toolbox, toolIDs, idIndex, secondTime = false,
+    reverse = false, nextKey = null, prevKey = null;
+
+function test() {
+  waitForExplicitFinish();
+
+  addTab("about:blank", function() {
+    let target = TargetFactory.forTab(gBrowser.selectedTab);
+    idIndex = 0;
+
+    target.makeRemote().then(() => {
+      toolIDs = gDevTools.getToolDefinitionArray()
+                  .filter(def => def.isTargetSupported(target))
+                  .map(def => def.id);
+      gDevTools.showToolbox(target, toolIDs[0], Toolbox.HostType.BOTTOM)
+               .then(testShortcuts);
+    });
+  });
+}
+
+function testShortcuts(aToolbox, aIndex) {
+  if (aIndex == toolIDs.length) {
+    aIndex = 0;
+    if (secondTime) {
+      secondTime = false;
+      reverse = true;
+      aIndex = toolIDs.length - 2;
+    }
+    else {
+      secondTime = true;
+    }
+  }
+  else if (aIndex == -1) {
+    aIndex = toolIDs.length - 1;
+    if (secondTime) {
+      tidyUp();
+      return;
+    }
+    secondTime = true;
+  }
+
+  toolbox = aToolbox;
+  if (!nextKey) {
+    nextKey = toolbox.doc.getElementById("toolbox-next-tool-key")
+                     .getAttribute("key");
+    prevKey = toolbox.doc.getElementById("toolbox-previous-tool-key")
+                     .getAttribute("key");
+  }
+  info("Toolbox fired a `ready` event");
+
+  toolbox.once("select", onSelect);
+
+  if (aIndex != null) {
+    // This if block is to allow the call of onSelect without shortcut press for
+    // the first time. That happens because on opening of toolbox, one tool gets
+    // selected atleast.
+
+    let key = (reverse ? prevKey: nextKey);
+    let modifiers = {
+      accelKey: true
+    };
+    idIndex = aIndex;
+    info("Testing shortcut to switch to tool " + aIndex + ":" + toolIDs[aIndex] +
+         " using key " + key);
+    EventUtils.synthesizeKey(key, modifiers, toolbox.doc.defaultView);
+  }
+}
+
+function onSelect(event, id) {
+  info("toolbox-select event from " + id);
+
+  is(toolIDs.indexOf(id), idIndex,
+     "Correct tool is selected on pressing the shortcut for " + id);
+  // Execute soon to reset the stack trace.
+  executeSoon(() => {
+    testShortcuts(toolbox, idIndex + (reverse ? -1: 1));
+  });
+}
+
+function tidyUp() {
+  toolbox.destroy().then(function() {
+    gBrowser.removeCurrentTab();
+
+    toolbox = toolIDs = idIndex = Toolbox = secondTime = reverse = nextKey =
+      prevKey = null;
+    finish();
+  });
+}