TestMoveString.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 <stdio.h>

#include <stdlib.h>

#include "nsASCIIMask.h"

#include "nsString.h"

#include "nsStringBuffer.h"

#include "nsReadableUtils.h"

#include "nsCRTGlue.h"

#include "mozilla/RefPtr.h"

#include "mozilla/Unused.h"

#include "gtest/gtest.h"

namespace TestMoveString {

#define NEW_VAL "**new value**"

#define OLD_VAL "old value"

typedef mozilla::detail::StringDataFlags Df;

static void SetAsOwned(nsACString& aStr, const char* aValue) {

  size_t len = strlen(aValue);

  char* data = new char[len + 1];

  memcpy(data, aValue, len + 1);

  aStr.Adopt(data, len);

  EXPECT_EQ(aStr.GetDataFlags(), Df::OWNED | Df::TERMINATED);

  EXPECT_STREQ(aStr.BeginReading(), aValue);

static void ExpectTruncated(const nsACString& aStr) {

  EXPECT_EQ(aStr.Length(), uint32_t(0));

  EXPECT_STREQ(aStr.BeginReading(), "");

  EXPECT_EQ(aStr.GetDataFlags(), Df::TERMINATED);

static void ExpectNew(const nsACString& aStr) {

  EXPECT_EQ(aStr.Length(), strlen(NEW_VAL));

  EXPECT_TRUE(aStr.EqualsASCII(NEW_VAL));

TEST(MoveString, SharedIntoOwned)

  nsCString out;

  SetAsOwned(out, OLD_VAL);

  EXPECT_EQ(out.GetDataFlags(), Df::OWNED | Df::TERMINATED);

  nsCString in;

  in.Assign(NEW_VAL);

  EXPECT_EQ(in.GetDataFlags(), Df::REFCOUNTED | Df::TERMINATED);

  const char* data = in.get();

  out.Assign(std::move(in));

  ExpectTruncated(in);

  ExpectNew(out);

  EXPECT_EQ(out.GetDataFlags(), Df::REFCOUNTED | Df::TERMINATED);

  EXPECT_EQ(out.get(), data);

TEST(MoveString, OwnedIntoOwned)

  nsCString out;

  SetAsOwned(out, OLD_VAL);

  EXPECT_EQ(out.GetDataFlags(), Df::OWNED | Df::TERMINATED);

  nsCString in;

  SetAsOwned(in, NEW_VAL);

  EXPECT_EQ(in.GetDataFlags(), Df::OWNED | Df::TERMINATED);

  const char* data = in.get();

  out.Assign(std::move(in));

  ExpectTruncated(in);

  ExpectNew(out);

  EXPECT_EQ(out.GetDataFlags(), Df::OWNED | Df::TERMINATED);

  EXPECT_EQ(out.get(), data);

TEST(MoveString, LiteralIntoOwned)

  nsCString out;

  SetAsOwned(out, OLD_VAL);

  EXPECT_EQ(out.GetDataFlags(), Df::OWNED | Df::TERMINATED);

  nsCString in;

  in.AssignLiteral(NEW_VAL);

  EXPECT_EQ(in.GetDataFlags(), Df::LITERAL | Df::TERMINATED);

  const char* data = in.get();

  out.Assign(std::move(in));

  ExpectTruncated(in);

  ExpectNew(out);

  EXPECT_EQ(out.GetDataFlags(), Df::LITERAL | Df::TERMINATED);

  EXPECT_EQ(out.get(), data);

TEST(MoveString, AutoIntoOwned)

  nsCString out;

  SetAsOwned(out, OLD_VAL);

  EXPECT_EQ(out.GetDataFlags(), Df::OWNED | Df::TERMINATED);

  nsAutoCString in;

  in.Assign(NEW_VAL);

  EXPECT_EQ(in.GetDataFlags(), Df::INLINE | Df::TERMINATED);

  const char* data = in.get();

  out.Assign(std::move(in));

  ExpectTruncated(in);

  ExpectNew(out);

  EXPECT_EQ(out.GetDataFlags(), Df::REFCOUNTED | Df::TERMINATED);

  EXPECT_NE(out.get(), data);

TEST(MoveString, DepIntoOwned)

  nsCString out;

  SetAsOwned(out, OLD_VAL);

  EXPECT_EQ(out.GetDataFlags(), Df::OWNED | Df::TERMINATED);

  nsDependentCSubstring in(NEW_VAL "garbage after", strlen(NEW_VAL));

  EXPECT_EQ(in.GetDataFlags(), Df(0));

  out.Assign(std::move(in));

  ExpectTruncated(in);

  ExpectNew(out);

  EXPECT_EQ(out.GetDataFlags(), Df::REFCOUNTED | Df::TERMINATED);

TEST(MoveString, VoidIntoOwned)

  nsCString out;

  SetAsOwned(out, OLD_VAL);

  EXPECT_EQ(out.GetDataFlags(), Df::OWNED | Df::TERMINATED);

  nsCString in = VoidCString();

  EXPECT_EQ(in.GetDataFlags(), Df::VOIDED | Df::TERMINATED);

  out.Assign(std::move(in));

  ExpectTruncated(in);

  EXPECT_EQ(out.Length(), 0u);

  EXPECT_STREQ(out.get(), "");

  EXPECT_EQ(out.GetDataFlags(), Df::VOIDED | Df::TERMINATED);

TEST(MoveString, SharedIntoAuto)

  nsAutoCString out;

  out.Assign(OLD_VAL);

  EXPECT_EQ(out.GetDataFlags(), Df::INLINE | Df::TERMINATED);

  nsCString in;

  in.Assign(NEW_VAL);

  EXPECT_EQ(in.GetDataFlags(), Df::REFCOUNTED | Df::TERMINATED);

  const char* data = in.get();

  out.Assign(std::move(in));

  ExpectTruncated(in);

  ExpectNew(out);

  EXPECT_EQ(out.GetDataFlags(), Df::REFCOUNTED | Df::TERMINATED);

  EXPECT_EQ(out.get(), data);

TEST(MoveString, OwnedIntoAuto)

  nsAutoCString out;

  out.Assign(OLD_VAL);

  EXPECT_EQ(out.GetDataFlags(), Df::INLINE | Df::TERMINATED);

  nsCString in;

  SetAsOwned(in, NEW_VAL);

  EXPECT_EQ(in.GetDataFlags(), Df::OWNED | Df::TERMINATED);

  const char* data = in.get();

  out.Assign(std::move(in));

  ExpectTruncated(in);

  ExpectNew(out);

  EXPECT_EQ(out.GetDataFlags(), Df::OWNED | Df::TERMINATED);

  EXPECT_EQ(out.get(), data);

TEST(MoveString, LiteralIntoAuto)

  nsAutoCString out;

  out.Assign(OLD_VAL);

  EXPECT_EQ(out.GetDataFlags(), Df::INLINE | Df::TERMINATED);

  nsCString in;

  in.AssignLiteral(NEW_VAL);

  EXPECT_EQ(in.GetDataFlags(), Df::LITERAL | Df::TERMINATED);

  const char* data = in.get();

  out.Assign(std::move(in));

  ExpectTruncated(in);

  ExpectNew(out);

  EXPECT_EQ(out.GetDataFlags(), Df::LITERAL | Df::TERMINATED);

  EXPECT_EQ(out.get(), data);

TEST(MoveString, AutoIntoAuto)

  nsAutoCString out;

  out.Assign(OLD_VAL);

  EXPECT_EQ(out.GetDataFlags(), Df::INLINE | Df::TERMINATED);

  nsAutoCString in;

  in.Assign(NEW_VAL);

  EXPECT_EQ(in.GetDataFlags(), Df::INLINE | Df::TERMINATED);

  const char* data = in.get();

  out.Assign(std::move(in));

  ExpectTruncated(in);

  ExpectNew(out);

  EXPECT_EQ(out.GetDataFlags(), Df::INLINE | Df::TERMINATED);

  EXPECT_NE(out.get(), data);

TEST(MoveString, DepIntoAuto)

  nsAutoCString out;

  out.Assign(OLD_VAL);

  EXPECT_EQ(out.GetDataFlags(), Df::INLINE | Df::TERMINATED);

  nsDependentCSubstring in(NEW_VAL "garbage after", strlen(NEW_VAL));

  EXPECT_EQ(in.GetDataFlags(), Df(0));

  out.Assign(std::move(in));

  ExpectTruncated(in);

  ExpectNew(out);

  EXPECT_EQ(out.GetDataFlags(), Df::INLINE | Df::TERMINATED);

TEST(MoveString, VoidIntoAuto)

  nsAutoCString out;

  out.Assign(OLD_VAL);

  EXPECT_EQ(out.GetDataFlags(), Df::INLINE | Df::TERMINATED);

  nsCString in = VoidCString();

  EXPECT_EQ(in.GetDataFlags(), Df::VOIDED | Df::TERMINATED);

  out.Assign(std::move(in));

  ExpectTruncated(in);

  EXPECT_EQ(out.Length(), 0u);

  EXPECT_STREQ(out.get(), "");

  EXPECT_EQ(out.GetDataFlags(), Df::VOIDED | Df::TERMINATED);

#undef NEW_VAL

#undef OLD_VAL

}  // namespace TestMoveString