js/src/jsapi-tests/testForwardSetProperty.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_ForwardSetPropertyTo
   9 #include "jsapi-tests/tests.h"
  10
  11 using namespace JS;
  12
  13 BEGIN_TEST(testForwardSetProperty) {
  14   RootedValue v1(cx);
  15   EVAL(
  16       "var foundValue; \n"
  17       "var obj1 = { set prop(val) { foundValue = this; } }; \n"
  18       "obj1;",
  19       &v1);
  20
  21   RootedValue v2(cx);
  22   EVAL(
  23       "var obj2 = Object.create(obj1); \n"
  24       "obj2;",
  25       &v2);
  26
  27   RootedValue v3(cx);
  28   EVAL(
  29       "var obj3 = {}; \n"
  30       "obj3;",
  31       &v3);
  32
  33   RootedObject obj1(cx, &v1.toObject());
  34   RootedObject obj2(cx, &v2.toObject());
  35   RootedObject obj3(cx, &v3.toObject());
  36
  37   RootedValue setval(cx, Int32Value(42));
  38
  39   RootedValue propkey(cx);
  40   EVAL("'prop';", &propkey);
  41
  42   RootedId prop(cx);
  43   CHECK(JS_ValueToId(cx, propkey, &prop));
  44
  45   EXEC(
  46       "function assertEq(a, b, msg) \n"
  47       "{ \n"
  48       "  if (!Object.is(a, b)) \n"
  49       "    throw new Error('Assertion failure: ' + msg); \n"
  50       "}");
  51
  52   // Non-strict setter
  53
  54   JS::ObjectOpResult result;
  55   CHECK(JS_ForwardSetPropertyTo(cx, obj2, prop, setval, v3, result));
  56   CHECK(result);
  57
  58   EXEC("assertEq(foundValue, obj3, 'wrong receiver passed to setter');");
  59
  60   CHECK(JS_ForwardSetPropertyTo(cx, obj2, prop, setval, setval, result));
  61   CHECK(result);
  62
  63   EXEC(
  64       "assertEq(typeof foundValue === 'object', true, \n"
  65       "         'passing 42 as receiver to non-strict setter ' + \n"
  66       "         'must box');");
  67
  68   EXEC(
  69       "assertEq(foundValue instanceof Number, true, \n"
  70       "         'passing 42 as receiver to non-strict setter ' + \n"
  71       "         'must box to a Number');");
  72
  73   EXEC(
  74       "assertEq(foundValue.valueOf(), 42, \n"
  75       "         'passing 42 as receiver to non-strict setter ' + \n"
  76       "         'must box to new Number(42)');");
  77
  78   // Strict setter
  79
  80   RootedValue v4(cx);
  81   EVAL("({ set prop(val) { 'use strict'; foundValue = this; } })", &v4);
  82   RootedObject obj4(cx, &v4.toObject());
  83
  84   CHECK(JS_ForwardSetPropertyTo(cx, obj4, prop, setval, v3, result));
  85   CHECK(result);
  86
  87   EXEC("assertEq(foundValue, obj3, 'wrong receiver passed to strict setter');");
  88
  89   CHECK(JS_ForwardSetPropertyTo(cx, obj4, prop, setval, setval, result));
  90   CHECK(result);
  91
  92   EXEC(
  93       "assertEq(foundValue, 42, \n"
  94       "         '42 passed as receiver to strict setter was mangled');");
  95
  96   return true;
  97 }
  98 END_TEST(testForwardSetProperty)