Classes: Expand test to cover strict runtime behavior

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
 
 (function TestBasics() {
   var C = class C {}
   assertEquals(typeof C, 'function');
   assertEquals(C.__proto__, Function.prototype);
@@ skipping 141 matching lines @@
 (function TestStrictMode() {
   class C {}
 
   with ({a: 1}) {
     assertEquals(1, a);
   }
 
   assertThrows('class C extends function B() { with ({}); return B; }() {}',
                SyntaxError);
 
+  var D = class extends function() {
+    arguments.caller;
+  } {};
+  assertThrows(function() {
+    Object.getPrototypeOf(D).arguments;
+  }, TypeError);
+  assertThrows(function() {
+    new D;
+  }, TypeError);
 })();
 
 
 (function TestToString() {
   class C {}
   assertEquals('class C {}', C.toString());
 
   class D { constructor() { 42; } }
   assertEquals('class D { constructor() { 42; } }', D.toString());
 
@@ skipping 589 matching lines @@
   }, ReferenceError);
 
   assertThrows(function() {
     (class x extends x {});
   }, ReferenceError);
 
   assertThrows(function() {
     var x = (class x extends x {});
   }, ReferenceError);
 })();