string_inplace.cpp

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/*
 * This file is part of OpenTTD.
 * OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
 * OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
 */
 
#include "../stdafx.h"
#include "../3rdparty/catch2/catch.hpp"
#include "../core/string_inplace.hpp"
#include "../safeguards.h"
 
TEST_CASE("InPlaceReplacement")
{
  std::array<char, 4> buffer{1, 2, 3, 4};
  InPlaceReplacement inplace(buffer);
 
  CHECK(!inplace.builder.AnyBytesWritten());
  CHECK(inplace.builder.GetBytesWritten() == 0);
  CHECK(inplace.builder.GetWrittenData() == ""sv);
  CHECK(!inplace.builder.AnyBytesUnused());
  CHECK(inplace.builder.GetBytesUnused() == 0);
  CHECK(!inplace.consumer.AnyBytesRead());
  CHECK(inplace.consumer.GetBytesRead() == 0);
  CHECK(inplace.consumer.AnyBytesLeft());
  CHECK(inplace.consumer.GetBytesLeft() == 4);
 
  CHECK(inplace.consumer.ReadUint16LE() == 0x201);
 
  CHECK(inplace.builder.GetBytesWritten() == 0);
  CHECK(inplace.builder.GetBytesUnused() == 2);
  CHECK(inplace.consumer.GetBytesRead() == 2);
  CHECK(inplace.consumer.GetBytesLeft() == 2);
 
  inplace.builder.PutUint8(11);
 
  CHECK(inplace.builder.GetBytesWritten() == 1);
  CHECK(inplace.builder.GetBytesUnused() == 1);
  CHECK(inplace.consumer.GetBytesRead() == 2);
  CHECK(inplace.consumer.GetBytesLeft() == 2);
 
  inplace.builder.PutUint8(12);
 
  CHECK(inplace.builder.GetBytesWritten() == 2);
  CHECK(inplace.builder.GetBytesUnused() == 0);
  CHECK(inplace.consumer.GetBytesRead() == 2);
  CHECK(inplace.consumer.GetBytesLeft() == 2);
 
  CHECK(buffer[0] == 11);
  CHECK(buffer[1] == 12);
  CHECK(buffer[2] == 3);
  CHECK(buffer[3] == 4);
}