1 files changed, 41 insertions, 0 deletions
diff --git a/js/src/tests/test262/language/computed-property-names/to-name-side-effects/numbers-object.js b/js/src/tests/test262/language/computed-property-names/to-name-side-effects/numbers-object.js
new file mode 100644
index 0000000000..041787dbef
--- /dev/null
+++ b/js/src/tests/test262/language/computed-property-names/to-name-side-effects/numbers-object.js
@@ -0,0 +1,41 @@
+// Copyright (C) 2014 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 12.2.5
+description: >
+    to name side effects numbers
+includes: [compareArray.js]
+---*/
+var counter = 0;
+var key1 = {
+  valueOf: function() {
+    assert.sameValue(counter++, 0, "The result of `counter++` is `0`");
+    return 1;
+  },
+  toString: null
+};
+var key2 = {
+  valueOf: function() {
+    assert.sameValue(counter++, 1, "The result of `counter++` is `1`");
+    return 2;
+  },
+  toString: null
+};
+
+var object = {
+  a: 'A',
+  [key1]: 'B',
+  c: 'C',
+  [key2]: 'D',
+};
+assert.sameValue(counter, 2, "The value of `counter` is `2`");
+assert.sameValue(object.a, 'A', "The value of `object.a` is `'A'`. Defined as `a: 'A'`");
+assert.sameValue(object[1], 'B', "The value of `object[1]` is `'B'`. Defined as `[key1]: 'B'`");
+assert.sameValue(object.c, 'C', "The value of `object.c` is `'C'`. Defined as `c: 'C'`");
+assert.sameValue(object[2], 'D', "The value of `object[2]` is `'D'`. Defined as `[key2]: 'D'`");
+assert(
+  compareArray(Object.getOwnPropertyNames(object), ['1', '2', 'a', 'c']),
+  "`compareArray(Object.getOwnPropertyNames(object), ['1', '2', 'a', 'c'])` returns `true`"
+);
+
+reportCompare(0, 0);