diff -r 000000000000 -r 6474c204b198 browser/devtools/styleinspector/test/browser_ruleview_completion-existing-property_02.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/devtools/styleinspector/test/browser_ruleview_completion-existing-property_02.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,101 @@
+/* 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 and values are autocompleted and cycled correctly
+// when editing existing properties in the rule view
+
+// format :
+//  [
+//    what key to press,
+//    modifers,
+//    expected input box value after keypress,
+//    selectedIndex of the popup,
+//    total items in the popup
+//  ]
+let testData = [
+  ["b", {}, "beige", 0, 8],
+  ["l", {}, "black", 0, 4],
+  ["VK_DOWN", {}, "blanchedalmond", 1, 4],
+  ["VK_DOWN", {}, "blue", 2, 4],
+  ["VK_RIGHT", {}, "blue", -1, 0],
+  [" ", {}, "blue !important", 0, 10],
+  ["!", {}, "blue !important", 0, 0],
+  ["VK_BACK_SPACE", {}, "blue !", -1, 0],
+  ["VK_BACK_SPACE", {}, "blue ", -1, 0],
+  ["VK_BACK_SPACE", {}, "blue", -1, 0],
+  ["VK_TAB", {shiftKey: true}, "color", -1, 0],
+  ["VK_BACK_SPACE", {}, "", -1, 0],
+  ["d", {}, "direction", 0, 3],
+  ["i", {}, "direction", 0, 2],
+  ["s", {}, "display", -1, 0],
+  ["VK_TAB", {}, "blue", -1, 0],
+  ["n", {}, "none", -1, 0],
+  ["VK_RETURN", {}, null, -1, 0]
+];
+
+let TEST_URL = "data:text/html,<h1 style='color: red'>Filename: " +
+               "browser_bug894376_css_value_completion_existing_property_value_pair.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 value");
+  let value = view.doc.querySelectorAll(".ruleview-propertyvalue")[0];
+  let editor = yield focusEditableField(value);
+
+  info("Starting to test for css property completion");
+  for (let i = 0; i < testData.length; i ++) {
+    // Re-define the editor at each iteration, because the focus may have moved
+    // from property to value and back
+    editor = inplaceEditor(view.doc.activeElement);
+    yield testCompletion(testData[i], editor, view);
+  }
+});
+
+function* testCompletion([key, modifiers, completion, index, total], editor, view) {
+  info("Pressing key " + key);
+  info("Expecting " + completion + ", " + index + ", " + total);
+
+  let onKeyPress;
+
+  if (/tab/ig.test(key)) {
+    info("Waiting for the new property or value editor to get focused");
+    let brace = view.doc.querySelector(".ruleview-ruleclose");
+    onKeyPress = once(brace.parentNode, "focus", true);
+  } else if (/(right|return|back_space)/ig.test(key)) {
+    info("Adding event listener for right|return|back_space keys");
+    onKeyPress = once(editor.input, "keypress");
+  } else {
+    info("Waiting for after-suggest event on the editor");
+    onKeyPress = editor.once("after-suggest");
+  }
+
+  info("Synthesizing key " + key + ", modifiers: " + Object.keys(modifiers));
+  EventUtils.synthesizeKey(key, modifiers, view.doc.defaultView);
+
+  yield onKeyPress;
+  yield wait(1); // Equivalent of executeSoon
+
+  // The key might have been a TAB or shift-TAB, in which case the editor will
+  // be a new one
+  editor = inplaceEditor(view.doc.activeElement);
+
+  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");
+  }
+}