add smoke test for the optional chaining operator

rbri · rbri · commit c191aa6c69c4 · 2025-08-13T06:57:48.000+02:00
diff --git a/src/changes/changes.xml b/src/changes/changes.xml
@@ -8,6 +8,9 @@
 
     <body>
         <release version="4.15.0" date="August xx, 2025" description="Chrome/Edge 139, Firefox 141, Bugfixes">
+            <action type="add" dev="RhinoTeam">
+                core-js: Fix a regression regarding optional chaining operators.
+            </action>
             <action type="add" dev="rbri">
                 WebClient option pageRefreshLimit added. Refresh handling changed to support a clear limit.
                 The initial value is 72 to be backward compatible.
diff --git a/src/test/java/org/htmlunit/javascript/OptionalChainingOperatorTest.java b/src/test/java/org/htmlunit/javascript/OptionalChainingOperatorTest.java
@@ -0,0 +1,66 @@
+/*
+ * Copyright (c) 2002-2025 Gargoyle Software Inc.
+ *
+ * Licensed 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
+ * https://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.
+ */
+package org.htmlunit.javascript;
+
+import org.htmlunit.WebDriverTestCase;
+import org.htmlunit.junit.annotation.Alerts;
+import org.junit.jupiter.api.Test;
+
+/**
+ * Tests for the optional chaining operator (?.).
+ *
+ * @author Ronald Brill
+ */
+public class OptionalChainingOperatorTest extends WebDriverTestCase {
+
+    /**
+     * @throws Exception if the test fails
+     */
+    @Test
+    @Alerts({"undefined", "two"})
+    public void basic() throws Exception {
+        final String html = DOCTYPE_HTML
+            + "<html>\n"
+            + "<body>\n"
+            + "<script>\n"
+            + LOG_TITLE_FUNCTION_NORMALIZE
+            + "  var o = { a: 'one', b: { c: 'two' }};\n"
+            + "  log(o.x?.c);\n"
+            + "  log(o.b?.c);\n"
+            + "</script>\n"
+            + "</body></html>";
+
+        loadPageVerifyTitle2(html);
+    }
+
+    /**
+     * @throws Exception if the test fails
+     */
+    @Test
+    @Alerts("true")
+    public void parse() throws Exception {
+        final String html = DOCTYPE_HTML
+            + "<html>\n"
+            + "<body>\n"
+            + "<script>\n"
+            + LOG_TITLE_FUNCTION_NORMALIZE
+            + "  var o = {a: true};\n"
+            + "  log(o?.['a']);\n"
+            + "</script>\n"
+            + "</body></html>";
+
+        loadPageVerifyTitle2(html);
+    }
+}
