js/src/jsapi-tests/testForceLexicalInitialization.cpp
author Jan de Mooij <jdemooij@mozilla.com>
Fri, 28 Oct 2016 12:09:24 +0200
changeset 319981 e2e3d6a007392ced30987f312d468dd37ea87528
parent 311083 cb6fc6d38f8df50e25502dc55ee1ed2dd3d7a304
permissions -rw-r--r--
Bug 1312003 - Add some missing return value checks to JSAPI tests. r=arai

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 * vim: set ts=8 sts=4 et sw=4 tw=99:
 */
/* 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 "jsfriendapi.h"
#include "jsapi-tests/tests.h"
#include "vm/EnvironmentObject.h"

BEGIN_TEST(testForceLexicalInitialization)
{
    // Attach an uninitialized lexical to a scope and ensure that it's
    // set to undefined
    js::RootedGlobalObject g(cx, cx->global());
    JS::Rooted<js::LexicalEnvironmentObject*> env(
        cx, js::LexicalEnvironmentObject::createGlobal(cx, g));

    JS::RootedValue uninitialized(cx, JS::MagicValue(JS_UNINITIALIZED_LEXICAL));
    js::RootedPropertyName name(cx, Atomize(cx, "foopi", 4)->asPropertyName());
    JS::RootedId id(cx, NameToId(name));
    unsigned attrs = JSPROP_ENUMERATE | JSPROP_PERMANENT;

    CHECK(NativeDefineProperty(cx, env, id, uninitialized, nullptr, nullptr, attrs));

    // Verify that "foopi" is uninitialized
    const JS::Value v = env->getSlot(env->lookup(cx, id)->slot());
    CHECK(v.isMagic(JS_UNINITIALIZED_LEXICAL));

    ForceLexicalInitialization(cx, env);

    // Verify that "foopi" has been initialized to undefined
    const JS::Value v2 = env->getSlot(env->lookup(cx, id)->slot());
    CHECK(v2.isUndefined());

    return true;
}
END_TEST(testForceLexicalInitialization)