1 files changed, 20 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/RegExp/named-groups/duplicate-names-replace.js b/js/src/tests/test262/built-ins/RegExp/named-groups/duplicate-names-replace.js
new file mode 100644
index 0000000000..76893704af
--- /dev/null
+++ b/js/src/tests/test262/built-ins/RegExp/named-groups/duplicate-names-replace.js
@@ -0,0 +1,20 @@
+// |reftest| skip -- regexp-duplicate-named-groups is not supported
+// Copyright 2022 Kevin Gibbons. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: String.prototype.replace behavior with duplicate named capture groups
+esid: prod-GroupSpecifier
+features: [regexp-duplicate-named-groups]
+---*/
+
+assert.sameValue("ab".replace(/(?<x>a)|(?<x>b)/, "[$<x>]"), "[a]b");
+assert.sameValue("ba".replace(/(?<x>a)|(?<x>b)/, "[$<x>]"), "[b]a");
+
+assert.sameValue("ab".replace(/(?<x>a)|(?<x>b)/, "[$<x>][$1][$2]"), "[a][a][]b");
+assert.sameValue("ba".replace(/(?<x>a)|(?<x>b)/, "[$<x>][$1][$2]"), "[b][][b]a");
+
+assert.sameValue("ab".replace(/(?<x>a)|(?<x>b)/g, "[$<x>]"), "[a][b]");
+assert.sameValue("ba".replace(/(?<x>a)|(?<x>b)/g, "[$<x>]"), "[b][a]");
+
+reportCompare(0, 0);