1 files changed, 37 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Map/prototype/clear/map-data-list-is-preserved.js b/js/src/tests/test262/built-ins/Map/prototype/clear/map-data-list-is-preserved.js
new file mode 100644
index 0000000000..269cecf346
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Map/prototype/clear/map-data-list-is-preserved.js
@@ -0,0 +1,37 @@
+// 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.clear
+description: >
+  The existing [[MapData]] List is preserved.
+info: |
+  The existing [[MapData]] List is preserved because there may be existing
+  MapIterator objects that are suspended midway through iterating over that
+  List.
+
+  Map.prototype.clear ( )
+
+  ...
+  4. Let entries be the List that is the value of M’s [[MapData]] internal slot.
+  5. Repeat for each Record {[[key]], [[value]]} p that is an element of
+  entries,
+    a. Set p.[[key]] to empty.
+    b. Set p.[[value]] to empty.
+  6. Return undefined.
+---*/
+
+var m = new Map([
+  [1, 1],
+  [2, 2],
+  [3, 3]
+]);
+var e = m.entries();
+
+e.next();
+m.clear();
+
+var n = e.next();
+assert.sameValue(n.value, undefined);
+assert.sameValue(n.done, true);
+
+reportCompare(0, 0);