/*
  This file is part of libmicrohttpd
  Copyright (C) 2017-2021 Karlson2k (Evgeny Grin)

  This test tool 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 2, or
  (at your option) any later version.

  This test tool 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
  Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public
  License along with this library; if not, write to the Free Software
  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
*/

/**
 * @file microhttpd/test_http_reasons.c
 * @brief  Unit tests for MHD_get_reason_phrase_for() function
 * @author Karlson2k (Evgeny Grin)
 */

#include "mhd_options.h"
#include <stdio.h>
#include <string.h>
#include "microhttpd.h"
#include "mhd_str.h"

static const char *const r_unknown = "unknown";

/* Return zero when no error is detected */
static int
expect_result (unsigned int code, const char *expected)
{
  const char *const reason = MHD_get_reason_phrase_for (code);
  const size_t len = MHD_get_reason_phrase_len_for (code);
  size_t exp_len;
  if (! MHD_str_equal_caseless_ (reason, expected))
  {
    fprintf (stderr,
             "Incorrect reason returned for code %u:\n  Returned: \"%s\"  \tExpected: \"%s\"\n",
             code, reason, expected);
    return 1;
  }
  if (r_unknown == expected)
    exp_len = 0;
  else
    exp_len = strlen (expected);
  if (exp_len != len)
  {
    fprintf (stderr,
             "Incorrect reason length returned for code %u:\n  Returned: \"%u\"  \tExpected: \"%u\"\n",
             code, (unsigned) len, (unsigned) exp_len);
    return 1;
  }
  return 0;
}


static int
expect_absent (unsigned int code)
{
  return expect_result (code, r_unknown);
}


static int
test_absent_codes (void)
{
  int errcount = 0;
  errcount += expect_absent (0);
  errcount += expect_absent (1);
  errcount += expect_absent (50);
  errcount += expect_absent (99);
  errcount += expect_absent (600);
  errcount += expect_absent (601);
  errcount += expect_absent (900);
  errcount += expect_absent (10000);
  return errcount;
}


static int
test_1xx (void)
{
  int errcount = 0;
  errcount += expect_result (MHD_HTTP_CONTINUE, "continue");
  errcount += expect_result (MHD_HTTP_PROCESSING, "processing");
  errcount += expect_absent (110);
  errcount += expect_absent (190);
  return errcount;
}


static int
test_2xx (void)
{
  int errcount = 0;
  errcount += expect_result (MHD_HTTP_OK, "ok");
  errcount += expect_result (MHD_HTTP_ALREADY_REPORTED, "already reported");
  errcount += expect_absent (217);
  errcount += expect_result (MHD_HTTP_IM_USED, "im used");
  errcount += expect_absent (230);
  errcount += expect_absent (295);
  return errcount;
}


static int
test_3xx (void)
{
  int errcount = 0;
  errcount += expect_result (MHD_HTTP_MULTIPLE_CHOICES, "multiple choices");
  errcount += expect_result (MHD_HTTP_SEE_OTHER, "see other");
  errcount += expect_result (MHD_HTTP_PERMANENT_REDIRECT, "permanent redirect");
  errcount += expect_absent (311);
  errcount += expect_absent (399);
  return errcount;
}


static int
test_4xx (void)
{
  int errcount = 0;
  errcount += expect_result (MHD_HTTP_BAD_REQUEST, "bad request");
  errcount += expect_result (MHD_HTTP_NOT_FOUND, "not found");
  errcount += expect_result (MHD_HTTP_URI_TOO_LONG, "uri too long");
  errcount += expect_result (MHD_HTTP_EXPECTATION_FAILED, "expectation failed");
  errcount += expect_result (MHD_HTTP_REQUEST_HEADER_FIELDS_TOO_LARGE,
                             "request header fields too large");
  errcount += expect_absent (441);
  errcount += expect_result (MHD_HTTP_UNAVAILABLE_FOR_LEGAL_REASONS,
                             "unavailable for legal reasons");
  errcount += expect_absent (470);
  errcount += expect_absent (493);
  return errcount;
}


static int
test_5xx (void)
{
  int errcount = 0;
  errcount += expect_result (MHD_HTTP_INTERNAL_SERVER_ERROR,
                             "internal server error");
  errcount += expect_result (MHD_HTTP_BAD_GATEWAY, "bad gateway");
  errcount += expect_result (MHD_HTTP_HTTP_VERSION_NOT_SUPPORTED,
                             "http version not supported");
  errcount += expect_result (MHD_HTTP_NETWORK_AUTHENTICATION_REQUIRED,
                             "network authentication required");
  errcount += expect_absent (520);
  errcount += expect_absent (597);
  return errcount;
}


int
main (int argc, char *argv[])
{
  int errcount = 0;
  (void) argc; (void) argv; /* Unused. Silent compiler warning. */

  errcount += test_absent_codes ();
  errcount += test_1xx ();
  errcount += test_2xx ();
  errcount += test_3xx ();
  errcount += test_4xx ();
  errcount += test_5xx ();
  return errcount == 0 ? 0 : 1;
}