JSIPCValueTest.cpp

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/* -*- 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 "gtest/gtest.h"

#include "js/Value.h"

#include "mozilla/Casting.h"

#include "mozilla/dom/BrowsingContext.h"

#include "mozilla/dom/JSIPCValueUtils.h"

#include "mozilla/dom/ScriptSettings.h"

#include "nsReadableUtils.h"

#include "xpcpublic.h"

using namespace mozilla;

using namespace mozilla::dom;

static bool IsGenericNaN(double aDouble) {

  return BitwiseCast<uint64_t>(JS::GenericNaN()) ==

         BitwiseCast<uint64_t>(aDouble);

// Check that a non-canonical NaN value will correctly be serialized to

// canonical NaN.

TEST(JSIPCValueTest, DeserializeNonCanonicalNaN)

  AutoJSAPI jsapi;

  ASSERT_TRUE(jsapi.Init(xpc::PrivilegedJunkScope()));

  JSContext* cx = jsapi.cx();

  JS::Rooted<JS::Value> retVal(cx);

  IgnoredErrorResult error;

  // Create and verify a non-canonical NaN.

  double nan1 = BitwiseCast<double>(0xFFFE414141414141);

  ASSERT_TRUE(std::isnan(nan1));

  ASSERT_TRUE(!IsGenericNaN(nan1));

  // Do the deserialization.

  auto ipcValue = JSIPCValue(nan1);

  JSIPCValueUtils::ToJSVal(cx, std::move(ipcValue), &retVal, error);

  ASSERT_TRUE(!error.Failed());

  // The deserialized value should be the canonical NaN.

  ASSERT_TRUE(retVal.isDouble());

  double nan2 = retVal.toDouble();

  ASSERT_TRUE(std::isnan(nan2));

  ASSERT_TRUE(IsGenericNaN(nan2));

TEST(JSIPCValueTest, String)

  AutoJSAPI jsapi;

  ASSERT_TRUE(jsapi.Init(xpc::PrivilegedJunkScope()));

  JSContext* cx = jsapi.cx();

  JS::Rooted<JS::Value> retVal(cx);

  IgnoredErrorResult error;

  auto ipcValue = JSIPCValue(VoidString());

  JSIPCValueUtils::ToJSVal(cx, std::move(ipcValue), &retVal, error);

  ASSERT_TRUE(!error.Failed());

  ASSERT_TRUE(retVal.isNull());

TEST(JSIPCValueTest, MaybeDiscardedBrowsingContext)

  AutoJSAPI jsapi;

  ASSERT_TRUE(jsapi.Init(xpc::PrivilegedJunkScope()));

  JSContext* cx = jsapi.cx();

  JS::Rooted<JS::Value> retVal(cx);

  IgnoredErrorResult error;

  auto ipcValue = JSIPCValue(MaybeDiscardedBrowsingContext());

  JSIPCValueUtils::ToJSVal(cx, std::move(ipcValue), &retVal, error);

  ASSERT_TRUE(!error.Failed());

  ASSERT_TRUE(retVal.isNull());