/home/mhx/git/github/libmoost/test/io/file_operations.cpp

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/* vim:set ts=3 sw=3 sts=3 et: */
#include <boost/test/unit_test.hpp>
#include <boost/test/test_tools.hpp>

#include <vector>
#include <fstream>

#include <boost/filesystem/path.hpp>
#include <boost/filesystem/operations.hpp>
#include <boost/cstdint.hpp>

#include "../../include/moost/io/file_operations.hpp"

using namespace boost::filesystem;
using namespace moost::io;

BOOST_AUTO_TEST_SUITE( file_operations_test )

struct Fixture
{
  struct TempDirectory
  {
    path Path;
    TempDirectory(const std::string & path_name) : Path(path_name) { create_directory(Path); }
    ~TempDirectory() { remove_all(Path); }
  };
  TempDirectory temp_dir;

  Fixture()
  : temp_dir("file_operations_test")
  {
  }
  ~Fixture()
  {
  }
};

// can we grow?
BOOST_FIXTURE_TEST_CASE( test_grow_size, Fixture )
{
  std::ofstream out("file_operations_test/blah.txt");
  out << "blah" << std::flush;
  file_operations::change_size("file_operations_test/blah.txt", 128);
  BOOST_CHECK_EQUAL(file_size(path("file_operations_test/blah.txt")), 128);
}

// can we grow past the 4 gb limit?
BOOST_FIXTURE_TEST_CASE( test_grow_4gb, Fixture )
{
  std::ofstream out("file_operations_test/blah.txt");
  out << "blah" << std::flush;
  file_operations::change_size("file_operations_test/blah.txt", UINT64_C(4294967396));
  BOOST_CHECK_EQUAL(file_size(path("file_operations_test/blah.txt")), UINT64_C(4294967396));
}

// can we shrink?
BOOST_FIXTURE_TEST_CASE( test_shrink_size, Fixture )
{
  std::ofstream out("file_operations_test/blah.txt");
  out << "blah blahblahblah blah" << std::flush;
  file_operations::change_size("file_operations_test/blah.txt", 4);
  BOOST_CHECK_EQUAL(file_size(path("file_operations_test/blah.txt")), 4);
}

// can we shrink to zero?
BOOST_FIXTURE_TEST_CASE( test_shrink_zero, Fixture )
{
  std::ofstream out("file_operations_test/blah.txt");
  out << "blah blahblahblah blah" << std::flush;
  file_operations::change_size("file_operations_test/blah.txt", 0);
  BOOST_CHECK_EQUAL(file_size(path("file_operations_test/blah.txt")), 0);
}

// what happens if we change something that doesn't exist?
BOOST_FIXTURE_TEST_CASE( test_filenotfound, Fixture )
{
  BOOST_CHECK_THROW(file_operations::change_size("file_operations_test/blah.txt", 128), std::runtime_error);
}

BOOST_AUTO_TEST_SUITE_END()