1 files changed, 81 insertions, 0 deletions
diff --git a/devtools/client/framework/test/browser_toolbox_keyboard_navigation.js b/devtools/client/framework/test/browser_toolbox_keyboard_navigation.js
new file mode 100644
index 000000000..a22f87064
--- /dev/null
+++ b/devtools/client/framework/test/browser_toolbox_keyboard_navigation.js
@@ -0,0 +1,81 @@
+/* -*- indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim: set ft=javascript ts=2 et sw=2 tw=80: */
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// Tests keyboard navigation of devtools tabbar.
+
+const TEST_URL =
+  "data:text/html;charset=utf8,test page for toolbar keyboard navigation";
+
+function containsFocus(aDoc, aElm) {
+  let elm = aDoc.activeElement;
+  while (elm) {
+    if (elm === aElm) { return true; }
+    elm = elm.parentNode;
+  }
+  return false;
+}
+
+add_task(function* () {
+  info("Create a test tab and open the toolbox");
+  let toolbox = yield openNewTabAndToolbox(TEST_URL, "webconsole");
+  let doc = toolbox.doc;
+
+  let toolbar = doc.querySelector(".devtools-tabbar");
+  let toolbarControls = [...toolbar.querySelectorAll(
+    ".devtools-tab, button")].filter(elm =>
+      !elm.hidden && doc.defaultView.getComputedStyle(elm).getPropertyValue(
+        "display") !== "none");
+
+  // Put the keyboard focus onto the first toolbar control.
+  toolbarControls[0].focus();
+  ok(containsFocus(doc, toolbar), "Focus is within the toolbar");
+
+  // Move the focus away from toolbar to a next focusable element.
+  EventUtils.synthesizeKey("VK_TAB", {});
+  ok(!containsFocus(doc, toolbar), "Focus is outside of the toolbar");
+
+  // Move the focus back to the toolbar.
+  EventUtils.synthesizeKey("VK_TAB", { shiftKey: true });
+  ok(containsFocus(doc, toolbar), "Focus is within the toolbar again");
+
+  // Move through the toolbar forward using the right arrow key.
+  for (let i = 0; i < toolbarControls.length; ++i) {
+    is(doc.activeElement.id, toolbarControls[i].id, "New control is focused");
+    if (i < toolbarControls.length - 1) {
+      EventUtils.synthesizeKey("VK_RIGHT", {});
+    }
+  }
+
+  // Move the focus away from toolbar to a next focusable element.
+  EventUtils.synthesizeKey("VK_TAB", {});
+  ok(!containsFocus(doc, toolbar), "Focus is outside of the toolbar");
+
+  // Move the focus back to the toolbar.
+  EventUtils.synthesizeKey("VK_TAB", { shiftKey: true });
+  ok(containsFocus(doc, toolbar), "Focus is within the toolbar again");
+
+  // Move through the toolbar backward using the left arrow key.
+  for (let i = toolbarControls.length - 1; i >= 0; --i) {
+    is(doc.activeElement.id, toolbarControls[i].id, "New control is focused");
+    if (i > 0) { EventUtils.synthesizeKey("VK_LEFT", {}); }
+  }
+
+  // Move focus to the 3rd (non-first) toolbar control.
+  let expectedFocusedControl = toolbarControls[2];
+  EventUtils.synthesizeKey("VK_RIGHT", {});
+  EventUtils.synthesizeKey("VK_RIGHT", {});
+  is(doc.activeElement.id, expectedFocusedControl.id, "New control is focused");
+
+  // Move the focus away from toolbar to a next focusable element.
+  EventUtils.synthesizeKey("VK_TAB", {});
+  ok(!containsFocus(doc, toolbar), "Focus is outside of the toolbar");
+
+  // Move the focus back to the toolbar, ensure we land on the last active
+  // descendant control.
+  EventUtils.synthesizeKey("VK_TAB", { shiftKey: true });
+  is(doc.activeElement.id, expectedFocusedControl.id, "New control is focused");
+});