diff -r 000000000000 -r 6474c204b198 browser/devtools/styleinspector/test/browser_ruleview_add-property_02.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/devtools/styleinspector/test/browser_ruleview_add-property_02.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,70 @@
+/* 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 all sorts of additions and updates of properties in the rule-view
+// FIXME: TO BE SPLIT IN *MANY* SMALLER TESTS
+
+let test = asyncTest(function*() {
+  yield addTab("data:text/html;charset=utf-8,browser_ruleview_ui.js");
+  let {toolbox, inspector, view} = yield openRuleView();
+
+  info("Creating the test document");
+  let style = "" +
+    "#testid {" +
+    "  background-color: blue;" +
+    "}" +
+    ".testclass, .unmatched {" +
+    "  background-color: green;" +
+    "}";
+  let styleNode = addStyle(content.document, style);
+  content.document.body.innerHTML = "<div id='testid' class='testclass'>Styled Node</div>" +
+                                    "<div id='testid2'>Styled Node</div>";
+
+  yield testCreateNew(inspector, view);
+  yield inspector.once("inspector-updated");
+});
+
+function* testCreateNew(inspector, ruleView) {
+  // Create a new property.
+  let elementRuleEditor = ruleView.element.children[0]._ruleEditor;
+  let editor = yield focusEditableField(elementRuleEditor.closeBrace);
+
+  is(inplaceEditor(elementRuleEditor.newPropSpan), editor,
+    "Next focused editor should be the new property editor.");
+
+  let input = editor.input;
+
+  ok(input.selectionStart === 0 && input.selectionEnd === input.value.length,
+    "Editor contents are selected.");
+
+  // Try clicking on the editor's input again, shouldn't cause trouble (see bug 761665).
+  EventUtils.synthesizeMouse(input, 1, 1, {}, ruleView.doc.defaultView);
+  input.select();
+
+  info("Entering the property name");
+  input.value = "background-color";
+
+  info("Pressing RETURN and waiting for the value field focus");
+  let onFocus = once(elementRuleEditor.element, "focus", true);
+  EventUtils.sendKey("return", ruleView.doc.defaultView);
+  yield onFocus;
+  yield elementRuleEditor.rule._applyingModifications;
+
+  editor = inplaceEditor(ruleView.doc.activeElement);
+
+  is(elementRuleEditor.rule.textProps.length,  1, "Should have created a new text property.");
+  is(elementRuleEditor.propertyList.children.length, 1, "Should have created a property editor.");
+  let textProp = elementRuleEditor.rule.textProps[0];
+  is(editor, inplaceEditor(textProp.editor.valueSpan), "Should be editing the value span now.");
+
+  editor.input.value = "purple";
+  let onBlur = once(editor.input, "blur");
+  editor.input.blur();
+  yield onBlur;
+  yield elementRuleEditor.rule._applyingModifications;
+
+  is(textProp.value, "purple", "Text prop should have been changed.");
+}