Proxies: Make 'with' work, plus minor other fixes

test/mjsunit/harmony/proxies-for.js

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 44 matching lines @@
 
 TestForIn(["null", "a"], {
   enumerate: function() { return this.enumerate2() },
   enumerate2: function() { return [null, "a"] }
 })
 
 TestForIn(["b", "d"], {
   getPropertyNames: function() { return ["a", "b", "c", "d", "e"] },
   getPropertyDescriptor: function(k) {
     switch (k) {
-      case "a": return {enumerable: false, value: "3"};
-      case "b": return {enumerable: true, get get() {}};
-      case "c": return {value: 4};
-      case "d": return {get enumerable() { return true }};
+      case "a": return {enumerable: false, value: "3", configurable: true};
+      case "b": return {enumerable: true, get get() {}, configurable: true};
+      case "c": return {value: 4, configurable: true};
+      case "d": return {get enumerable() { return true }, configurable: true};
       default: return undefined;
     }
   }
 })
 
 TestForIn(["b", "a", "0", "c"], Proxy.create({
   get: function(pr, pk) {
     return function() { return ["b", "a", 0, "c"] }
   }
 }))
@@ skipping 17 matching lines @@
   var oo = Object.create(o)
   oo.y = 0
   var found = []
   for (var x in oo) found.push(x)
   assertArrayEquals(["y", "z"].concat(properties), found)
 }
 
 TestForInDerived(["0", "a"], {
   enumerate: function() { return [0, "a"] },
   getPropertyDescriptor: function(k) {
-    return k == "0" || k == "a" ? {} : undefined
+    return k == "0" || k == "a" ? {configurable: true} : undefined
   }
 })
 
 TestForInDerived(["null", "a"], {
   enumerate: function() { return this.enumerate2() },
   enumerate2: function() { return [null, "a"] },
   getPropertyDescriptor: function(k) {
-    return k == "null" || k == "a" ? {} : undefined
+    return k == "null" || k == "a" ? {configurable: true} : undefined
   }
 })
 
 TestForInDerived(["b", "d"], {
   getPropertyNames: function() { return ["a", "b", "c", "d", "e"] },
   getPropertyDescriptor: function(k) {
     switch (k) {
-      case "a": return {enumerable: false, value: "3"};
-      case "b": return {enumerable: true, get get() {}};
-      case "c": return {value: 4};
-      case "d": return {get enumerable() { return true }};
+      case "a": return {enumerable: false, value: "3", configurable: true};
+      case "b": return {enumerable: true, get get() {}, configurable: true};
+      case "c": return {value: 4, configurable: true};
+      case "d": return {get enumerable() { return true }, configurable: true};
       default: return undefined;
     }
   }
 })
 
 
 
 // Throw exception in enumerate trap.
 
 function TestForInThrow(handler) {
@@ skipping 23 matching lines @@
 TestForInThrow({
   getPropertyNames: function() { return ["a"] },
   getPropertyDescriptor: function() { throw "myexn" }
 })
 
 TestForInThrow(Proxy.create({
   get: function(pr, pk) {
     return function() { throw "myexn" }
   }
 }))