From 5f8de423f190bbb79a62f804151bc24824fa32d8 Mon Sep 17 00:00:00 2001 From: "Matt A. Tobin" Date: Fri, 2 Feb 2018 04:16:08 -0500 Subject: Add m-esr52 at 52.6.0 --- .../jsapi-tests/testForceLexicalInitialization.cpp | 39 ++++++++++++++++++++++ 1 file changed, 39 insertions(+) create mode 100644 js/src/jsapi-tests/testForceLexicalInitialization.cpp (limited to 'js/src/jsapi-tests/testForceLexicalInitialization.cpp') diff --git a/js/src/jsapi-tests/testForceLexicalInitialization.cpp b/js/src/jsapi-tests/testForceLexicalInitialization.cpp new file mode 100644 index 000000000..c19e15c17 --- /dev/null +++ b/js/src/jsapi-tests/testForceLexicalInitialization.cpp @@ -0,0 +1,39 @@ +/* -*- 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 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) -- cgit v1.2.3