TestHarness.h

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/*
 * Copyright (C) 2007-2015 Hypertable, Inc.
 *
 * This file is part of Hypertable.
 *
 * Hypertable 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; either version 3
 * of the License, or any later version.
 *
 * Hypertable 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 this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA.
 */

#ifndef Common_TestHarness_h
#define Common_TestHarness_h

#include "Logger.h"

#include <iostream>
#include <fstream>
#include <string>

extern "C" {
#include <errno.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
}

namespace Hypertable {

  class TestHarness {
  public:
    TestHarness(const char *name)
        : m_error(0) {
      Logger::initialize(name);

      // open temporary output file
      sprintf(m_output_file, "%s%d", name, (int)getpid());

      if ((m_fd = open(m_output_file, O_CREAT | O_TRUNC | O_WRONLY, 0644))
          < 0) {
        HT_ERRORF("open(%s) failed - %s", m_output_file, strerror(errno));
        exit(EXIT_FAILURE);
      }

      Logger::get()->set_test_mode(m_fd);
    }

    ~TestHarness() {
      if (!m_error)
        unlink(m_output_file);
    }

    int get_log_file_descriptor() { return m_fd; }

    void validate_and_exit(const char *golden_file) {
      validate(golden_file);
      std::quick_exit(m_error ? 1 : 0);
    }

    int validate(const char *golden_file) {
      close(m_fd);
      String command = (String)"diff " + m_output_file + " " + golden_file;
      m_error = system(command.c_str());

      if (m_error)
        std::cerr << "Command: "<< command << " exited with "<< m_error
                  << ", see '" << m_output_file << "'" << std::endl;

      return m_error;
    }

    void regenerate_golden_file(const char *golden_file) {
      String command = (String)"mv " + m_output_file + " " + golden_file;
      HT_ASSERT(system(command.c_str()) == 0);
    }

    void display_error_and_exit() {
      close(m_fd);
      std::cerr << "Error, see '" << m_output_file << "'" << std::endl;
      std::quick_exit(EXIT_FAILURE);
    }

  private:
    char m_output_file[128];

    int m_fd;

    int m_error;
  };

} // namespace Hypertable

#endif // Common_TestHarness_h