diff -r 000000000000 -r 6474c204b198 browser/devtools/styleinspector/test/browser_ruleview_completion-existing-property_01.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/devtools/styleinspector/test/browser_ruleview_completion-existing-property_01.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,106 @@
+/* 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";
+
+// Test that CSS property names are autocompleted and cycled correctly when
+// editing an existing property in the rule view
+
+const MAX_ENTRIES = 10;
+
+// format :
+//  [
+//    what key to press,
+//    expected input box value after keypress,
+//    selectedIndex of the popup,
+//    total items in the popup
+//  ]
+let testData = [
+  ["VK_RIGHT", "border", -1, 0],
+  ["-","border-bottom", 0, 10],
+  ["b","border-bottom", 0, 6],
+  ["VK_BACK_SPACE", "border-b", -1, 0],
+  ["VK_BACK_SPACE", "border-", -1, 0],
+  ["VK_BACK_SPACE", "border", -1, 0],
+  ["VK_BACK_SPACE", "borde", -1, 0],
+  ["VK_BACK_SPACE", "bord", -1, 0],
+  ["VK_BACK_SPACE", "bor", -1, 0],
+  ["VK_BACK_SPACE", "bo", -1, 0],
+  ["VK_BACK_SPACE", "b", -1, 0],
+  ["VK_BACK_SPACE", "", -1, 0],
+  ["d", "direction", 0, 3],
+  ["VK_DOWN", "display", 1, 3],
+  ["VK_DOWN", "dominant-baseline", 2, 3],
+  ["VK_DOWN", "direction", 0, 3],
+  ["VK_DOWN", "display", 1, 3],
+  ["VK_UP", "direction", 0, 3],
+  ["VK_UP", "dominant-baseline", 2, 3],
+  ["VK_UP", "display", 1, 3],
+  ["VK_BACK_SPACE", "d", -1, 0],
+  ["i", "direction", 0, 2],
+  ["s", "display", -1, 0],
+  ["VK_BACK_SPACE", "dis", -1, 0],
+  ["VK_BACK_SPACE", "di", -1, 0],
+  ["VK_BACK_SPACE", "d", -1, 0],
+  ["VK_BACK_SPACE", "", -1, 0],
+  ["f", "fill", 0, MAX_ENTRIES],
+  ["i", "fill", 0, 4],
+  ["VK_LEFT", "fill", -1, 0],
+  ["VK_LEFT", "fill", -1, 0],
+  ["i", "fiill", -1, 0],
+  ["VK_ESCAPE", null, -1, 0],
+];
+
+let TEST_URL = "data:text/html,<h1 style='border: 1px solid red'>Filename" +
+               ": browser_bug893965_css_property_completion_existing_property.js</h1>";
+
+let test = asyncTest(function*() {
+  yield addTab(TEST_URL);
+  let {toolbox, inspector, view} = yield openRuleView();
+
+  info("Selecting the test node");
+  yield selectNode("h1", inspector);
+
+  info("Focusing the css property editable field");
+  let propertyName = view.doc.querySelectorAll(".ruleview-propertyname")[0];
+  let editor = yield focusEditableField(propertyName);
+
+  info("Starting to test for css property completion");
+  for (let i = 0; i < testData.length; i ++) {
+    yield testCompletion(testData[i], editor, view);
+  }
+});
+
+function* testCompletion([key, completion, index, total], editor, view) {
+  info("Pressing key " + key);
+  info("Expecting " + completion + ", " + index + ", " + total);
+
+  let onSuggest;
+
+  if (/(left|right|back_space|escape)/ig.test(key)) {
+    info("Adding event listener for left|right|back_space|escape keys");
+    onSuggest = once(editor.input, "keypress");
+  } else {
+    info("Waiting for after-suggest event on the editor");
+    onSuggest = editor.once("after-suggest");
+  }
+
+  info("Synthesizing key " + key);
+  EventUtils.synthesizeKey(key, {}, view.doc.defaultView);
+
+  yield onSuggest;
+  yield wait(1); // Equivalent of executeSoon
+
+  info("Checking the state");
+  if (completion != null) {
+    is(editor.input.value, completion, "Correct value is autocompleted");
+  }
+  if (total == 0) {
+    ok(!(editor.popup && editor.popup.isOpen), "Popup is closed");
+  } else {
+    ok(editor.popup._panel.state == "open" || editor.popup._panel.state == "showing", "Popup is open");
+    is(editor.popup.getItems().length, total, "Number of suggestions match");
+    is(editor.popup.selectedIndex, index, "Correct item is selected");
+  }
+}