[es6] Implement Reflect.enumerate.

test/mjsunit/harmony/reflect.js

 // Copyright 2015 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-reflect
 
 // TODO(neis): Test with proxies.
 
 
 
@@ skipping 238 matching lines @@
 (function testReflectIsExtensibleOnObject() {
   // This should be the last test as it modifies the objects irreversibly.
   for (let tgt of objects) {
     prepare(tgt);
     if (tgt instanceof Int32Array) continue;  // issue v8:4460
     assertTrue(Reflect.isExtensible(tgt));
     Object.preventExtensions(tgt);
     assertFalse(Reflect.isExtensible(tgt));
   }
 })();
+
+
+
+////////////////////////////////////////////////////////////////////////////////
+// Reflect.enumerate
+
+
+(function testReflectEnumerateArity() {
+  assertEquals(1, Reflect.enumerate.length);
+})();
+
+
+(function testReflectEnumerateOnNonObject() {
+  assertThrows(function() { Reflect.enumerate(); }, TypeError);
+  assertThrows(function() { Reflect.enumerate(42); }, TypeError);
+  assertThrows(function() { Reflect.enumerate(null); }, TypeError);
+})();
+
+
+// See reflect-enumerate*.js for further tests.