Quelle  testForwardSetProperty.cpp   Sprache: C

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 * vim: set ts=8 sts=2 et sw=2 tw=80:
 */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "js/PropertyAndElement.h"  // JS_ForwardSetPropertyTo
#include "jsapi-tests/tests.h"

using namespace JS;

BEGIN_TEST(testForwardSetProperty) {
  RootedValue v1(cx);
  EVAL(
      "var foundValue; \n"
      "var obj1 = { set prop(val) { foundValue = this; } }; \n"
      "obj1;",
      &v1);

  RootedValue v2(cx);
  EVAL(
      "var obj2 = Object.create(obj1); \n"
      "obj2;",
      &v2);

  RootedValue v3(cx);
  EVAL(
      "var obj3 = {}; \n"
      "obj3;",
      &v3);

  RootedObject obj1(cx, &v1.toObject());
  RootedObject obj2(cx, &v2.toObject());
  RootedObject obj3(cx, &v3.toObject());

  RootedValue setval(cx, Int32Value(42));

  RootedValue propkey(cx);
  EVAL("'prop';", &propkey);

  RootedId prop(cx);
  CHECK(JS_ValueToId(cx, propkey, &prop));

  EXEC(
      "function assertEq(a, b, msg) \n"
      "{ \n"
      " if (!Object.is(a, b)) \n"
      " throw new Error('Assertion failure: ' + msg); \n"
      "}");

  // Non-strict setter

  JS::ObjectOpResult result;
  CHECK(JS_ForwardSetPropertyTo(cx, obj2, prop, setval, v3, result));
  CHECK(result);

  EXEC("assertEq(foundValue, obj3, 'wrong receiver passed to setter');");

  CHECK(JS_ForwardSetPropertyTo(cx, obj2, prop, setval, setval, result));
  CHECK(result);

  EXEC(
      "assertEq(typeof foundValue === 'object', true, \n"
      " 'passing 42 as receiver to non-strict setter ' + \n"
      " 'must box');");

  EXEC(
      "assertEq(foundValue instanceof Number, true, \n"
      " 'passing 42 as receiver to non-strict setter ' + \n"
      " 'must box to a Number');");

  EXEC(
      "assertEq(foundValue.valueOf(), 42, \n"
      " 'passing 42 as receiver to non-strict setter ' + \n"
      " 'must box to new Number(42)');");

  // Strict setter

  RootedValue v4(cx);
  EVAL("({ set prop(val) { 'use strict'; foundValue = this; } })", &v4);
  RootedObject obj4(cx, &v4.toObject());

  CHECK(JS_ForwardSetPropertyTo(cx, obj4, prop, setval, v3, result));
  CHECK(result);

  EXEC("assertEq(foundValue, obj3, 'wrong receiver passed to strict setter');");

  CHECK(JS_ForwardSetPropertyTo(cx, obj4, prop, setval, setval, result));
  CHECK(result);

  EXEC(
      "assertEq(foundValue, 42, \n"
      " '42 passed as receiver to strict setter was mangled');");

  return true;
}
END_TEST(testForwardSetProperty)