Poison .arguments and .caller for generator functions

test/mjsunit/harmony/generators-poisoned-properties.js

Index: test/mjsunit/harmony/generators-poisoned-properties.js
diff --git a/test/mjsunit/harmony/generators-poisoned-properties.js b/test/mjsunit/harmony/generators-poisoned-properties.js
new file mode 100644
index 0000000000000000000000000000000000000000..39a583ec976d10e965395433edf9ce85a70fa9a4
--- /dev/null
+++ b/test/mjsunit/harmony/generators-poisoned-properties.js
@@ -0,0 +1,42 @@
+// Copyright 2014 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Flags: --harmony-generators
+
+function assertIteratorResult(value, done, result) {
+  assertEquals({value: value, done: done}, result);
+}
+
+function test(f) {
+  var cdesc = Object.getOwnPropertyDescriptor(f, "caller");
+  var adesc = Object.getOwnPropertyDescriptor(f, "arguments");
+
+  assertFalse(cdesc.enumerable);
+  assertFalse(cdesc.configurable);
+
+  assertFalse(adesc.enumerable);
+  assertFalse(adesc.configurable);
+
+  assertSame(cdesc.get, cdesc.set);
+  assertSame(cdesc.get, adesc.get);
+  assertSame(cdesc.get, adesc.set);
+
+  assertTrue(cdesc.get instanceof Function);
+  assertEquals(0, cdesc.get.length);
+  assertThrows(cdesc.get, TypeError);
+
+  assertThrows(function() { return f.caller; }, TypeError);
+  assertThrows(function() { f.caller = 42; }, TypeError);
+  assertThrows(function() { return f.arguments; }, TypeError);
+  assertThrows(function() { f.arguments = 42; }, TypeError);
+}
+
+function *sloppy() { test(sloppy); }
+function *strict() { "use strict"; test(strict); }
+
+test(sloppy);
+test(strict);
+
+assertIteratorResult(undefined, true, sloppy().next());
+assertIteratorResult(undefined, true, strict().next());