1 files changed, 49 insertions, 0 deletions
diff --git a/devtools/client/inspector/rules/test/browser_rules_completion-new-property_03.js b/devtools/client/inspector/rules/test/browser_rules_completion-new-property_03.js
new file mode 100644
index 0000000000..4f5577a21e
--- /dev/null
+++ b/devtools/client/inspector/rules/test/browser_rules_completion-new-property_03.js
@@ -0,0 +1,49 @@
+/* Any copyright is dedicated to the Public Domain.
+ http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// Regression test for a case where completing gave the wrong answer.
+// See bug 1179318.
+
+const TEST_URI = "<h1 style='color: red'>Header</h1>";
+
+add_task(async function () {
+  await addTab("data:text/html;charset=utf-8," + encodeURIComponent(TEST_URI));
+  const { toolbox, inspector, view } = await openRuleView();
+
+  info("Test autocompletion for background-color");
+  await runAutocompletionTest(toolbox, inspector, view);
+});
+
+async function runAutocompletionTest(toolbox, inspector, view) {
+  info("Selecting the test node");
+  await selectNode("h1", inspector);
+
+  info("Focusing the new property editable field");
+  const ruleEditor = getRuleViewRuleEditor(view, 0);
+  const editor = await focusNewRuleViewProperty(ruleEditor);
+
+  info('Sending "background" to the editable field');
+  for (const key of "background") {
+    const onSuggest = editor.once("after-suggest");
+    EventUtils.synthesizeKey(key, {}, view.styleWindow);
+    await onSuggest;
+  }
+
+  const itemIndex = 4;
+
+  const bgcItem = editor.popup.getItemAtIndex(itemIndex);
+  is(
+    bgcItem.label,
+    "background-color",
+    "check the expected completion element"
+  );
+
+  editor.popup.selectedIndex = itemIndex;
+
+  const node = editor.popup._list.childNodes[itemIndex];
+  EventUtils.synthesizeMouseAtCenter(node, {}, editor.popup._window);
+
+  is(editor.input.value, "background-color", "Correct value is autocompleted");
+}