1 files changed, 25 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Map/prototype/set/replaces-a-value.js b/js/src/tests/test262/built-ins/Map/prototype/set/replaces-a-value.js
new file mode 100644
index 0000000000..9fe4e95c3f
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Map/prototype/set/replaces-a-value.js
@@ -0,0 +1,25 @@
+// Copyright (C) 2015 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+esid: sec-map.prototype.set
+description: >
+  Replaces a value in the map.
+info: |
+  Map.prototype.set ( key , value )
+
+  ...
+  5. Repeat for each Record {[[key]], [[value]]} p that is an element of
+  entries,
+    a. If p.[[key]] is not empty and SameValueZero(p.[[key]], key) is true, then
+      i. Set p.[[value]] to value.
+      ii. Return M.
+  ...
+---*/
+
+var m = new Map([['item', 1]]);
+
+m.set('item', 42);
+assert.sameValue(m.get('item'), 42);
+assert.sameValue(m.size, 1);
+
+reportCompare(0, 0);