1 files changed, 37 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/RegExp/match-indices/indices-groups-properties.js b/js/src/tests/test262/built-ins/RegExp/match-indices/indices-groups-properties.js
new file mode 100644
index 0000000000..83e51de27d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/RegExp/match-indices/indices-groups-properties.js
@@ -0,0 +1,37 @@
+// Copyright 2019 Ron Buckton. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: Properties of the groups object of indices are created with CreateDataProperty
+includes: [compareArray.js, propertyHelper.js]
+esid: sec-makeindicesarray
+features: [regexp-named-groups, regexp-match-indices]
+info: |
+  MakeIndicesArray ( S, indices, groupNames, hasIndices )
+    13. For each integer _i_ such that _i_ >= 0 and _i_ < _n_, do
+      e. If _i_ > 0 and _groupNames_[_i_ - 1] is not *undefined*, then
+        i. Perform ! CreateDataProperty(_groups_, _groupNames_[_i_ - 1], _matchIndicesArray_).
+---*/
+
+
+// Properties created on result.groups in textual order.
+let groupNames = Object.getOwnPropertyNames(/(?<fst>.)|(?<snd>.)/du.exec("abcd").indices.groups);
+assert.compareArray(groupNames, ["fst", "snd"]);
+
+// Properties are created with Define, not Set
+let counter = 0;
+Object.defineProperty(Object.prototype, 'x', {set() { counter++; }});
+
+let indices = /(?<x>.)/d.exec('a').indices;
+let groups = indices.groups;
+assert.sameValue(counter, 0);
+
+// Properties are writable, enumerable and configurable
+// (from CreateDataProperty)
+verifyProperty(groups, 'x', {
+    writable: true,
+    enumerable: true,
+    configurable: true
+});
+
+reportCompare(0, 0);