1 files changed, 41 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/RegExp/named-groups/groups-object.js b/js/src/tests/test262/built-ins/RegExp/named-groups/groups-object.js
new file mode 100644
index 0000000000..bec4ae8d59
--- /dev/null
+++ b/js/src/tests/test262/built-ins/RegExp/named-groups/groups-object.js
@@ -0,0 +1,41 @@
+// Copyright 2017 Aleksey Shvayka. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+description: Properties of the groups object are created with CreateDataProperty
+includes: [propertyHelper.js]
+esid: sec-regexpbuiltinexec
+features: [regexp-named-groups]
+info: |
+  Runtime Semantics: RegExpBuiltinExec ( R, S )
+    24. If _R_ contains any |GroupName|, then
+      a. Let _groups_ be ObjectCreate(*null*).
+    25. Else,
+      a. Let _groups_ be *undefined*.
+    26. Perform ! CreateDataProperty(_A_, `"groups"`, _groups_).
+---*/
+
+// `groups` is created with Define, not Set.
+let counter = 0;
+Object.defineProperty(Array.prototype, "groups", {
+  set() { counter++; }
+});
+
+let match = /(?<x>.)/.exec("a");
+assert.sameValue(counter, 0);
+
+// `groups` is writable, enumerable and configurable
+// (from CreateDataProperty).
+verifyProperty(match, "groups", {
+  writable: true,
+  enumerable: true,
+  configurable: true,
+});
+
+// The `__proto__` property on the groups object is not special,
+// and does not affect the [[Prototype]] of the resulting groups object.
+let {groups} = /(?<__proto__>.)/.exec("a");
+assert.sameValue("a", groups.__proto__);
+assert.sameValue(null, Object.getPrototypeOf(groups));
+
+reportCompare(0, 0);