1 files changed, 121 insertions, 0 deletions
diff --git a/devtools/client/shared/test/browser_autocomplete_popup.js b/devtools/client/shared/test/browser_autocomplete_popup.js
new file mode 100644
index 0000000000..d9d057ea1c
--- /dev/null
+++ b/devtools/client/shared/test/browser_autocomplete_popup.js
@@ -0,0 +1,121 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+add_task(async function () {
+  const AutocompletePopup = require("resource://devtools/client/shared/autocomplete-popup.js");
+
+  info("Create an autocompletion popup");
+  const { doc } = await createHost();
+  const input = doc.createElement("input");
+  doc.body.appendChild(input);
+
+  const autocompleteOptions = {
+    position: "top",
+    autoSelect: true,
+  };
+  const popup = new AutocompletePopup(doc, autocompleteOptions);
+  input.focus();
+
+  const items = [
+    { label: "item0", value: "value0" },
+    { label: "item1", value: "value1" },
+    { label: "item2", value: "value2" },
+  ];
+
+  ok(!popup.isOpen, "popup is not open");
+  ok(!input.hasAttribute("aria-activedescendant"), "no aria-activedescendant");
+
+  const onPopupOpen = popup.once("popup-opened");
+  popup.openPopup(input);
+  await onPopupOpen;
+
+  ok(popup.isOpen, "popup is open");
+  is(popup.itemCount, 0, "no items");
+  ok(!input.hasAttribute("aria-activedescendant"), "no aria-activedescendant");
+
+  popup.setItems(items);
+
+  is(popup.itemCount, items.length, "items added");
+  is(
+    JSON.stringify(popup.getItems()),
+    JSON.stringify(items),
+    "getItems returns back the same items"
+  );
+  is(popup.selectedIndex, 0, "Index of the first item from top is selected.");
+  is(popup.selectedItem, items[0], "First item from top is selected");
+  // Make sure the list containing the active descendant doesn't get rebuilt
+  // when the selected item changes.
+  const listClone = getListFromActiveDescendant(popup, input);
+  checkActiveDescendant(popup, input, listClone);
+
+  popup.selectItemAtIndex(1);
+
+  is(popup.selectedIndex, 1, "index 1 is selected");
+  is(popup.selectedItem, items[1], "item1 is selected");
+  checkActiveDescendant(popup, input, listClone);
+
+  popup.selectedItem = items[2];
+
+  is(popup.selectedIndex, 2, "index 2 is selected");
+  is(popup.selectedItem, items[2], "item2 is selected");
+  checkActiveDescendant(popup, input, listClone);
+
+  is(popup.selectPreviousItem(), items[1], "selectPreviousItem() works");
+
+  is(popup.selectedIndex, 1, "index 1 is selected");
+  is(popup.selectedItem, items[1], "item1 is selected");
+  checkActiveDescendant(popup, input, listClone);
+
+  is(popup.selectNextItem(), items[2], "selectNextItem() works");
+
+  is(popup.selectedIndex, 2, "index 2 is selected");
+  is(popup.selectedItem, items[2], "item2 is selected");
+  checkActiveDescendant(popup, input, listClone);
+
+  ok(popup.selectNextItem(), "selectNextItem() works");
+
+  is(popup.selectedIndex, 0, "index 0 is selected");
+  is(popup.selectedItem, items[0], "item0 is selected");
+  checkActiveDescendant(popup, input, listClone);
+
+  popup.clearItems();
+  is(popup.itemCount, 0, "items cleared");
+  ok(!input.hasAttribute("aria-activedescendant"), "no aria-activedescendant");
+
+  const onPopupClose = popup.once("popup-closed");
+  popup.hidePopup();
+  await onPopupClose;
+});
+
+function stripNS(text) {
+  return text.replace(RegExp(' xmlns="http://www.w3.org/1999/xhtml"', "g"), "");
+}
+
+function getListFromActiveDescendant(popup, input) {
+  const activeElement = input.ownerDocument.activeElement;
+  const descendantId = activeElement.getAttribute("aria-activedescendant");
+  const cloneItem = input.ownerDocument.querySelector("#" + descendantId);
+  return cloneItem.parentNode;
+}
+
+function checkActiveDescendant(popup, input, list) {
+  const activeElement = input.ownerDocument.activeElement;
+  const descendantId = activeElement.getAttribute("aria-activedescendant");
+  const popupItem = popup._tooltip.panel.querySelector("#" + descendantId);
+  const cloneItem = input.ownerDocument.querySelector("#" + descendantId);
+
+  ok(popupItem, "Active descendant is found in the popup list");
+  ok(cloneItem, "Active descendant is found in the list clone");
+  is(
+    cloneItem.parentNode,
+    list,
+    "Active descendant is a child of the expected list"
+  );
+  is(
+    stripNS(popupItem.outerHTML),
+    cloneItem.outerHTML,
+    "Cloned item has the same HTML as the original element"
+  );
+}