1 files changed, 31 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/RegExp/named-groups/string-replace-numbered.js b/js/src/tests/test262/built-ins/RegExp/named-groups/string-replace-numbered.js
new file mode 100644
index 0000000000..a9943dc7d2
--- /dev/null
+++ b/js/src/tests/test262/built-ins/RegExp/named-groups/string-replace-numbered.js
@@ -0,0 +1,31 @@
+// Copyright 2017 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: Named groups may be accessed in their replacement string by number
+esid: sec-getsubstitution
+features: [regexp-named-groups]
+info: |
+  Runtime Semantics: GetSubstitution( matched, str, position, captures, namedCaptures, replacement )
+
+  Table: Replacement Text Symbol Substitutions
+
+  Unicode Characters: $n
+  Replacement text:
+    The nth element of captures, where n is a single digit in the range 1 to 9. If
+    n≤m and the nth element of captures is undefined, use the empty String instead.
+    If n>m, the result is implementation-defined.
+---*/
+
+let source = "(?<fst>.)(?<snd>.)|(?<thd>x)";
+for (let flags of ["g", "gu"]) {
+  let re = new RegExp(source, flags);
+  assert.sameValue("badc", "abcd".replace(re, "$2$1"));
+}
+for (let flags of ["", "u"]) {
+  let re = new RegExp(source, flags);
+  assert.sameValue("bacd", "abcd".replace(re, "$2$1"));
+}
+
+
+reportCompare(0, 0);