/* Copyright (c) 2012, 2015, Oracle and/or its affiliates. All rights reserved.

   This program 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 of the License.

   This program 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 St, Fifth Floor, Boston, MA  02110-1301  USA */

// First include (the generated) my_config.h, to get correct platform defines.
#include "my_config.h"
#include <gtest/gtest.h>

#include "my_sys.h" // my_strerror()
#include "my_base.h" // HA_ERR_KEY_NOT_FOUND
#include "m_string.h" // native_strcasecmp
#include <string.h>

namespace my_error_unittest {

TEST(MyErrorTest, MyStrErrorSystem)
{
  char buf[512];
  const char *msg;

  msg= my_strerror(buf, sizeof(buf) - 1, 9999);
  EXPECT_TRUE(!native_strcasecmp("unknown error", msg) ||
              !native_strcasecmp("unknown error: 9999", msg) ||
              !native_strcasecmp("unknown error 9999", msg))
    << "msg<" << msg << ">";

  // try a proper error number
  msg= my_strerror(buf, sizeof(buf) - 1, EPERM);
  const char *os_msg= strerror(EPERM);
  EXPECT_STREQ(os_msg, msg)
    << "msg<" << msg << ">";
}

TEST(MyErrorTest, MyStrErrorHandlerPlugin)
{
  char buf[512];
  const char *msg;

  // try a HA error number
  msg= my_strerror(buf, sizeof(buf) - 1, HA_ERR_KEY_NOT_FOUND);
  EXPECT_STREQ("Didn't find key on read or update", msg);
}

TEST(MyErrorTest, MyGetErrMsgUninitialized)
{
  const char *msg;

  msg= my_get_err_msg(HA_ERR_KEY_NOT_FOUND);
  EXPECT_TRUE(msg == NULL);
}

const char *faux_errmsgs[]= { "alpha", "beta", NULL, "delta" };

static const int faux_error_first= 8000;
static const int faux_error_last=  8003;

const char* get_faux_errmsg(int nr)
{
  return faux_errmsgs[nr - faux_error_first];
}

TEST(MyErrorTest, MyGetErrMsgInitialized)
{
  const char *msg;

  EXPECT_EQ(0, my_error_register(get_faux_errmsg,
                                 faux_error_first,
                                 faux_error_last));

  // flag error when trying to register overlapping area
  EXPECT_NE(0, my_error_register(get_faux_errmsg,
                                 faux_error_first + 2,
                                 faux_error_last + 2));

  msg= my_get_err_msg(faux_error_first);
  EXPECT_STREQ("alpha", msg);

  msg= my_get_err_msg(faux_error_first + 1);
  EXPECT_STREQ("beta", msg);

  // within range. gives NULL here. higher level function will
  // substitute a default string before printing.
  msg= my_get_err_msg(faux_error_first + 2);
  EXPECT_TRUE(msg == NULL);

  // out of range
  msg= my_get_err_msg(faux_error_first - 1);
  EXPECT_TRUE(msg == NULL);

  msg= my_get_err_msg(faux_error_last);
  EXPECT_STREQ("delta", msg);

  // out of range
  msg= my_get_err_msg(faux_error_last + 1);
  EXPECT_TRUE(msg == NULL);

  EXPECT_FALSE(my_error_unregister(faux_error_first, faux_error_last));

  // flag error when trying to unregister twice
  EXPECT_TRUE(my_error_unregister(faux_error_first, faux_error_last));
}

}