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diff --git a/wicket-extensions/src/test/js/trapfocus-test.js b/wicket-extensions/src/test/js/trapfocus-test.js
new file mode 100644
index 0000000000..36d45763fa
--- /dev/null
+++ b/wicket-extensions/src/test/js/trapfocus-test.js
@@ -0,0 +1,78 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/*global QUnit: true, KeyboardEvent: true */
+
+Wicket.Event.add(window, 'domready', function() {
+ "use strict";
+
+ const { module, test } = QUnit;
+
+ const TAB_KEYCODE = 9;
+
+ function tab(target, shiftKey) {
+ target.dispatchEvent(new KeyboardEvent('keydown', {
+ key: 'Tab',
+ code: 'Tab',
+ keyCode: TAB_KEYCODE,
+ which: TAB_KEYCODE,
+ shiftKey: !!shiftKey,
+ bubbles: true,
+ cancelable: true
+ }));
+ }
+
+ module("Wicket.trapFocus");
+
+ test("Tab on the last focusable element wraps focus to the first, without throwing", assert => {
+ window.Wicket.trapFocus('trapFocusContainer', 'wicket-trap-focus-test');
+
+ var first = document.getElementById('trapFocusFirst');
+ var last = document.getElementById('trapFocusLast');
+ last.focus();
+
+ var threw = false;
+ try {
+ tab(last, false);
+ } catch (e) {
+ threw = true;
+ }
+
+ assert.notOk(threw, "tabbing past the last focusable element threw an exception");
+ assert.equal(document.activeElement, first,
+ "focus did not wrap around to the first focusable element");
+ });
+
+ test("Shift+Tab on the first focusable element wraps focus to the last, without throwing", assert => {
+ window.Wicket.trapFocus('trapFocusContainer', 'wicket-trap-focus-test');
+
+ var first = document.getElementById('trapFocusFirst');
+ var last = document.getElementById('trapFocusLast');
+ first.focus();
+
+ var threw = false;
+ try {
+ tab(first, true);
+ } catch (e) {
+ threw = true;
+ }
+
+ assert.notOk(threw, "shift-tabbing past the first focusable element threw an exception");
+ assert.equal(document.activeElement, last,
+ "focus did not wrap around to the last focusable element");
+ });
+});