1 files changed, 22 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Object/assign/ObjectOverride-sameproperty.js b/js/src/tests/test262/built-ins/Object/assign/ObjectOverride-sameproperty.js
new file mode 100644
index 0000000000..81f0f531ac
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Object/assign/ObjectOverride-sameproperty.js
@@ -0,0 +1,22 @@
+// Copyright 2015 Microsoft Corporation. All rights reserved.
+// This code is governed by the license found in the LICENSE file.
+
+/*---
+description: >
+  Object properties are assigned to target in ascending index order,
+  i.e. a later assignment to the same property overrides an earlier assignment.
+es6id:  19.1.2.1
+---*/
+
+var target = {
+  a: 1
+};
+var result = Object.assign(target, {
+  a: 2
+}, {
+  a: "c"
+});
+
+assert.sameValue(result.a, "c", "The value should be 'c'.");
+
+reportCompare(0, 0);