diff -r 000000000000 -r 6474c204b198 browser/devtools/styleinspector/test/browser_computedview_keybindings_02.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/devtools/styleinspector/test/browser_computedview_keybindings_02.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,62 @@
+/* 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 the computed-view keyboard navigation
+
+let test = asyncTest(function*() {
+  yield addTab("data:text/html,computed view keyboard nav test");
+
+  content.document.body.innerHTML = '<style type="text/css"> ' +
+    'span { font-variant: small-caps; color: #000000; } ' +
+    '.nomatches {color: #ff0000;}</style> <div id="first" style="margin: 10em; ' +
+    'font-size: 14pt; font-family: helvetica, sans-serif; color: #AAA">\n' +
+    '<h1>Some header text</h1>\n' +
+    '<p id="salutation" style="font-size: 12pt">hi.</p>\n' +
+    '<p id="body" style="font-size: 12pt">I am a test-case. This text exists ' +
+    'solely to provide some things to <span style="color: yellow">' +
+    'highlight</span> and <span style="font-weight: bold">count</span> ' +
+    'style list-items in the box at right. If you are reading this, ' +
+    'you should go do something else instead. Maybe read a book. Or better ' +
+    'yet, write some test-cases for another bit of code. ' +
+    '<span style="font-style: italic">some text</span></p>\n' +
+    '<p id="closing">more text</p>\n' +
+    '<p>even more text</p>' +
+    '</div>';
+  content.document.title = "Computed view keyboard navigation test";
+
+  info("Opening the computed-view");
+  let {toolbox, inspector, view} = yield openComputedView();
+
+  info("Selecting the test node");
+  yield selectNode("span", inspector);
+
+  info("Selecting the first computed style in the list");
+  let firstStyle = view.styleDocument.querySelector(".property-view");
+  ok(firstStyle, "First computed style found in panel");
+  firstStyle.focus();
+
+  info("Tab to select the 2nd style and press return");
+  let onExpanded = inspector.once("computed-view-property-expanded");
+  EventUtils.synthesizeKey("VK_TAB", {});
+  EventUtils.synthesizeKey("VK_RETURN", {});
+  yield onExpanded;
+
+  info("Verify the 2nd style has been expanded");
+  let secondStyleSelectors = view.styleDocument.querySelectorAll(
+    ".property-content .matchedselectors")[1];
+  ok(secondStyleSelectors.childNodes.length > 0, "Matched selectors expanded");
+
+  info("Tab back up and test the same thing, with space");
+  let onExpanded = inspector.once("computed-view-property-expanded");
+  EventUtils.synthesizeKey("VK_TAB", {shiftKey: true});
+  EventUtils.synthesizeKey("VK_SPACE", {});
+  yield onExpanded;
+
+  info("Verify the 1st style has been expanded too");
+  let firstStyleSelectors = view.styleDocument.querySelectorAll(
+    ".property-content .matchedselectors")[0];
+  ok(firstStyleSelectors.childNodes.length > 0, "Matched selectors expanded");
+});