1 files changed, 52 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Map/prototype/keys/returns-iterator.js b/js/src/tests/test262/built-ins/Map/prototype/keys/returns-iterator.js
new file mode 100644
index 0000000000..4fbcff7d21
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Map/prototype/keys/returns-iterator.js
@@ -0,0 +1,52 @@
+// 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.keys
+description: >
+  Returns an iterator.
+info: |
+  Map.prototype.keys ( )
+
+  ...
+  2. Return CreateMapIterator(M, "key").
+
+  23.1.5.1 CreateMapIterator Abstract Operation
+
+  ...
+  7. Return iterator.
+---*/
+
+var obj = {};
+var map = new Map();
+map.set('foo', 1);
+map.set(obj, 2);
+map.set(map, 3);
+
+var iterator = map.keys();
+var result;
+
+result = iterator.next();
+assert.sameValue(result.value, 'foo', 'First result `value` ("key")');
+assert.sameValue(result.done, false, 'First result `done` flag');
+
+result = iterator.next();
+assert.sameValue(result.value, obj, 'Second result `value` ("key")');
+assert.sameValue(result.done, false, 'Second result `done` flag');
+
+result = iterator.next();
+assert.sameValue(result.value, map, 'Third result `value` ("key")');
+assert.sameValue(result.done, false, 'Third result `done` flag');
+
+result = iterator.next();
+assert.sameValue(result.value, undefined, 'Exhausted result `value`');
+assert.sameValue(result.done, true, 'Exhausted result `done` flag');
+
+result = iterator.next();
+assert.sameValue(
+  result.value, undefined, 'Exhausted result `value` (repeated request)'
+);
+assert.sameValue(
+  result.done, true, 'Exhausted result `done` flag (repeated request)'
+);
+
+reportCompare(0, 0);