1 /*
2 * Copyright (c) 2002-2025 Gargoyle Software Inc.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 * https://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15 package org.htmlunit.javascript;
16
17 import org.htmlunit.WebDriverTestCase;
18 import org.htmlunit.junit.annotation.Alerts;
19 import org.junit.jupiter.api.Test;
20
21 /**
22 * Tests for the optional chaining operator (?.).
23 *
24 * @author Ronald Brill
25 */
26 public class OptionalChainingOperatorTest extends WebDriverTestCase {
27
28 /**
29 * @throws Exception if the test fails
30 */
31 @Test
32 @Alerts({"undefined", "two"})
33 public void basic() throws Exception {
34 final String html = DOCTYPE_HTML
35 + "<html>\n"
36 + "<body>\n"
37 + "<script>\n"
38 + LOG_TITLE_FUNCTION_NORMALIZE
39 + " var o = { a: 'one', b: { c: 'two' }};\n"
40 + " log(o.x?.c);\n"
41 + " log(o.b?.c);\n"
42 + "</script>\n"
43 + "</body></html>";
44
45 loadPageVerifyTitle2(html);
46 }
47
48 /**
49 * @throws Exception if the test fails
50 */
51 @Test
52 @Alerts("true")
53 public void parse() throws Exception {
54 final String html = DOCTYPE_HTML
55 + "<html>\n"
56 + "<body>\n"
57 + "<script>\n"
58 + LOG_TITLE_FUNCTION_NORMALIZE
59 + " var o = {a: true};\n"
60 + " log(o?.['a']);\n"
61 + "</script>\n"
62 + "</body></html>";
63
64 loadPageVerifyTitle2(html);
65 }
66 }