1 files changed, 23 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/RegExp/named-groups/duplicate-names-test.js b/js/src/tests/test262/built-ins/RegExp/named-groups/duplicate-names-test.js
new file mode 100644
index 0000000000..77a8dd4391
--- /dev/null
+++ b/js/src/tests/test262/built-ins/RegExp/named-groups/duplicate-names-test.js
@@ -0,0 +1,23 @@
+// |reftest| skip -- regexp-duplicate-named-groups is not supported
+// Copyright 2022 Igalia S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: Matching behavior with duplicate named capture groups
+esid: prod-GroupSpecifier
+features: [regexp-duplicate-named-groups]
+---*/
+
+assert(/(?<x>a)|(?<x>b)/.test("bab"));
+assert(/(?<x>b)|(?<x>a)/.test("bab"));
+
+assert(/(?:(?<x>a)|(?<x>b))\k<x>/.test("aa"));
+assert(/(?:(?<x>a)|(?<x>b))\k<x>/.test("bb"));
+
+let matchResult = /(?:(?:(?<x>a)|(?<x>b))\k<x>){2}/.test("aabb");
+assert(matchResult);
+
+let notMatched = /(?:(?:(?<x>a)|(?<x>b))\k<x>){2}/.test("abab");
+assert.sameValue(notMatched, false);
+
+reportCompare(0, 0);