1 files changed, 28 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Map/prototype/size/does-not-have-mapdata-internal-slot.js b/js/src/tests/test262/built-ins/Map/prototype/size/does-not-have-mapdata-internal-slot.js
new file mode 100644
index 0000000000..00ba29073d
--- /dev/null
+++ b/js/src/tests/test262/built-ins/Map/prototype/size/does-not-have-mapdata-internal-slot.js
@@ -0,0 +1,28 @@
+// 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-get-map.prototype.size
+description: >
+  Throws a TypeError if `this` object does not have a [[MapData]] internal slot.
+info: |
+  get Map.prototype.size
+
+  1. Let M be the this value.
+  2. If Type(M) is not Object, throw a TypeError exception.
+  3. If M does not have a [[MapData]] internal slot, throw a TypeError
+  exception.
+  ...
+---*/
+
+var descriptor = Object.getOwnPropertyDescriptor(Map.prototype, 'size');
+
+var map = new Map();
+
+// Does not throw
+descriptor.get.call(map);
+
+assert.throws(TypeError, function() {
+  descriptor.get.call([]);
+});
+
+reportCompare(0, 0);