js/src/jsapi-tests/testWindowNonConfigurable.cpp

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
   2  * vim: set ts=8 sts=2 et sw=2 tw=80:
   3  */
   4 /* This Source Code Form is subject to the terms of the Mozilla Public
   5  * License, v. 2.0. If a copy of the MPL was not distributed with this
   6  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   7
   8 #include "js/PropertyAndElement.h"  // JS_DefineProperty
   9 #include "jsapi-tests/tests.h"
  10
  11 static bool windowProxy_defineProperty(JSContext* cx, JS::HandleObject obj,
  12                                        JS::HandleId id,
  13                                        JS::Handle<JS::PropertyDescriptor> desc,
  14                                        JS::ObjectOpResult& result) {
  15   if (desc.hasConfigurable() && !desc.configurable()) {
  16     result.failCantDefineWindowNonConfigurable();
  17     return true;
  18   }
  19
  20   return NativeDefineProperty(cx, obj.as<js::NativeObject>(), id, desc, result);
  21 }
  22
  23 static const js::ObjectOps windowProxy_objectOps = {
  24     nullptr,                     // lookupProperty
  25     windowProxy_defineProperty,  // defineProperty
  26     nullptr,                     // hasProperty
  27     nullptr,                     // getProperty
  28     nullptr,                     // setProperty
  29     nullptr,                     // getOwnPropertyDescriptor
  30     nullptr,                     // deleteProperty
  31     nullptr,                     // getElements
  32     nullptr,                     // funToString
  33 };
  34
  35 static const JSClass windowProxy_class = {
  36     "WindowProxy", 0, nullptr, nullptr, nullptr, &windowProxy_objectOps};
  37
  38 BEGIN_TEST(testWindowNonConfigurable) {
  39   JS::RootedObject obj(cx, JS_NewObject(cx, &windowProxy_class));
  40   CHECK(obj);
  41   CHECK(JS_DefineProperty(cx, global, "windowProxy", obj, 0));
  42   JS::RootedValue v(cx);
  43   EVAL(
  44       "Object.defineProperty(windowProxy, 'bar', {value: 1, configurable: "
  45       "false})",
  46       &v);
  47   CHECK(v.isNull());  // This is the important bit!
  48   EVAL(
  49       "Object.defineProperty(windowProxy, 'bar', {value: 1, configurable: "
  50       "true})",
  51       &v);
  52   CHECK(&v.toObject() == obj);
  53   EVAL(
  54       "Reflect.defineProperty(windowProxy, 'foo', {value: 1, configurable: "
  55       "false})",
  56       &v);
  57   CHECK(v.isFalse());
  58   EVAL(
  59       "Reflect.defineProperty(windowProxy, 'foo', {value: 1, configurable: "
  60       "true})",
  61       &v);
  62   CHECK(v.isTrue());
  63
  64   return true;
  65 }
  66 END_TEST(testWindowNonConfigurable)