[es6] do not add caller/arguments to ES6 function definitions

test/mjsunit/harmony/classes.js

 // 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-classes --harmony-sloppy
 
 (function TestBasics() {
   var C = class C {}
   assertEquals(typeof C, 'function');
   assertEquals(C.__proto__, Function.prototype);
@@ skipping 857 matching lines @@
 
   class C3 extends Object {
     constructor() {
       ; 'use strict';;;;;
       // This is a comment.
       super();
     }
   };
   new C3();
 }());
+
+
+function testClassRestrictedProperties(C) {
+  assertEquals(false, C.hasOwnProperty("arguments"));
+  assertThrows(function() { return C.arguments; }, TypeError);
+  assertThrows(function() { C.arguments = {}; }, TypeError);
+
+  assertEquals(false, C.hasOwnProperty("caller"));
+  assertThrows(function() { return C.caller; }, TypeError);
+  assertThrows(function() { C.caller = {}; }, TypeError);
+
+  assertEquals(false, (new C).method.hasOwnProperty("arguments"));
+  assertThrows(function() { return new C().method.arguments; }, TypeError);
+  assertThrows(function() { new C().method.arguments = {}; }, TypeError);
+
+  assertEquals(false, (new C).method.hasOwnProperty("caller"));
+  assertThrows(function() { return new C().method.caller; }, TypeError);
+  assertThrows(function() { new C().method.caller = {}; }, TypeError);
+}
+
+
+(function testRestrictedPropertiesStrict() {
+  "use strict";
+  class ClassWithDefaultConstructor {
+    method() {}
+  }
+  class Class {
+    constructor() {}
+    method() {}
+  }
+  class DerivedClassWithDefaultConstructor extends Class {}
+  class DerivedClass extends Class { constructor() { super(); } }
+
+  testClassRestrictedProperties(ClassWithDefaultConstructor);
+  testClassRestrictedProperties(Class);
+  testClassRestrictedProperties(DerivedClassWithDefaultConstructor);
+  testClassRestrictedProperties(DerivedClass);
+  testClassRestrictedProperties(class { method() {} });
+  testClassRestrictedProperties(class { constructor() {} method() {} });
+  testClassRestrictedProperties(class extends Class { });
+  testClassRestrictedProperties(
+      class extends Class { constructor() { super(); } });
+})();
+
+
+(function testRestrictedPropertiesSloppy() {

[arv (Not doing code reviews), 2015/04/07 16:18:39]

Classes are always strict so I'm not sure this adds anything.

[caitp (gmail), 2015/04/07 16:29:57]

you could say it verifies the logic of the map picking in contexts.h, and also
helps verify that classes continue to be 100% strict code. Should I toss it out?

+  class ClassWithDefaultConstructor {
+    method() {}
+  }
+  class Class {
+    constructor() {}
+    method() {}
+  }
+  class DerivedClassWithDefaultConstructor extends Class {}
+  class DerivedClass extends Class { constructor() { super(); } }
+
+  testClassRestrictedProperties(ClassWithDefaultConstructor);
+  testClassRestrictedProperties(Class);
+  testClassRestrictedProperties(DerivedClassWithDefaultConstructor);
+  testClassRestrictedProperties(DerivedClass);
+  testClassRestrictedProperties(class { method() {} });
+  testClassRestrictedProperties(class { constructor() {} method() {} });
+  testClassRestrictedProperties(class extends Class { });
+  testClassRestrictedProperties(
+      class extends Class { constructor() { super(); } });
+})();