testGetPropertyDescriptor.cpp

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/* 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/CallAndConstruct.h"  // JS::IsCallable

#include "js/PropertyAndElement.h"

#include "js/PropertyDescriptor.h"  // JS::FromPropertyDescriptor, JS_GetPropertyDescriptor

#include "js/RootingAPI.h"

#include "jsapi-tests/tests.h"

BEGIN_TEST(test_GetPropertyDescriptor) {

  JS::RootedValue v(cx);

  EVAL("({ somename : 123 })", &v);

  CHECK(v.isObject());

  JS::RootedObject obj(cx, &v.toObject());

  JS::Rooted<mozilla::Maybe<JS::PropertyDescriptor>> desc(cx);

  JS::RootedObject holder(cx);

  CHECK(JS_GetPropertyDescriptor(cx, obj, "somename", &desc, &holder));

  CHECK(desc.isSome());

  CHECK_SAME(desc->value(), JS::Int32Value(123));

  JS::RootedValue descValue(cx);

  CHECK(JS::FromPropertyDescriptor(cx, desc, &descValue));

  CHECK(descValue.isObject());

  JS::RootedObject descObj(cx, &descValue.toObject());

  JS::RootedValue value(cx);

  CHECK(JS_GetProperty(cx, descObj, "value", &value));

  CHECK_EQUAL(value.toInt32(), 123);

  CHECK(JS_GetProperty(cx, descObj, "get", &value));

  CHECK(value.isUndefined());

  CHECK(JS_GetProperty(cx, descObj, "set", &value));

  CHECK(value.isUndefined());

  CHECK(JS_GetProperty(cx, descObj, "writable", &value));

  CHECK(value.isTrue());

  CHECK(JS_GetProperty(cx, descObj, "configurable", &value));

  CHECK(value.isTrue());

  CHECK(JS_GetProperty(cx, descObj, "enumerable", &value));

  CHECK(value.isTrue());

  CHECK(JS_GetPropertyDescriptor(cx, obj, "not-here", &desc, &holder));

  CHECK(desc.isNothing());

  CHECK(JS_GetPropertyDescriptor(cx, obj, "toString", &desc, &holder));

  JS::RootedObject objectProto(cx, JS::GetRealmObjectPrototype(cx));

  CHECK(objectProto);

  CHECK_EQUAL(holder, objectProto);

  CHECK(desc->value().isObject());

  CHECK(JS::IsCallable(&desc->value().toObject()));

  return true;

END_TEST(test_GetPropertyDescriptor)