1 files changed, 38 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/RegExp/named-groups/duplicate-names-exec.js b/js/src/tests/test262/built-ins/RegExp/named-groups/duplicate-names-exec.js
new file mode 100644
index 0000000000..9624cc6545
--- /dev/null
+++ b/js/src/tests/test262/built-ins/RegExp/named-groups/duplicate-names-exec.js
@@ -0,0 +1,38 @@
+// |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]
+includes: [compareArray.js]
+---*/
+
+assert.compareArray(/(?<x>a)|(?<x>b)/.exec("bab"), ["b", undefined, "b"]);
+assert.compareArray(/(?<x>b)|(?<x>a)/.exec("bab"), ["b", "b", undefined]);
+
+assert.compareArray(/(?:(?<x>a)|(?<x>b))\k<x>/.exec("aa"), ["aa", "a", undefined]);
+assert.compareArray(/(?:(?<x>a)|(?<x>b))\k<x>/.exec("bb"), ["bb", undefined, "b"]);
+
+let matchResult = /(?:(?:(?<x>a)|(?<x>b))\k<x>){2}/.exec("aabb");
+assert.compareArray(matchResult, ["aabb", undefined, "b"]);
+assert.sameValue(matchResult.groups.x, "b");
+
+assert.sameValue(/(?:(?:(?<x>a)|(?<x>b))\k<x>){2}/.exec("abab"), null);
+
+assert.sameValue(/(?:(?<x>a)|(?<x>b))\k<x>/.exec("abab"), null);
+
+assert.sameValue(/(?:(?<x>a)|(?<x>b))\k<x>/.exec("cdef"), null);
+
+assert.compareArray(/^(?:(?<a>x)|(?<a>y)|z)\k<a>$/.exec("xx"), ["xx", "x", undefined]);
+assert.compareArray(/^(?:(?<a>x)|(?<a>y)|z)\k<a>$/.exec("z"), ["z", undefined, undefined]);
+assert.sameValue(/^(?:(?<a>x)|(?<a>y)|z)\k<a>$/.exec("zz"), null);
+assert.compareArray(/(?<a>x)|(?:zy\k<a>)/.exec("zy"), ["zy", undefined]);
+
+assert.compareArray(/^(?:(?<a>x)|(?<a>y)|z){2}\k<a>$/.exec("xz"), ["xz", undefined, undefined]);
+assert.compareArray(/^(?:(?<a>x)|(?<a>y)|z){2}\k<a>$/.exec("yz"), ["yz", undefined, undefined]);
+assert.sameValue(/^(?:(?<a>x)|(?<a>y)|z){2}\k<a>$/.exec("xzx"), null);
+assert.sameValue(/^(?:(?<a>x)|(?<a>y)|z){2}\k<a>$/.exec("yzy"), null);
+
+reportCompare(0, 0);