/*
 * nghttp2 - HTTP/2 C Library
 *
 * Copyright (c) 2013 Tatsuhiro Tsujikawa
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
#include "util_test.h"

#include <cstring>
#include <iostream>
#include <random>

#include <CUnit/CUnit.h>

#include <nghttp2/nghttp2.h>

#include "util.h"
#include "template.h"

using namespace nghttp2;

namespace shrpx {

void test_util_streq(void) {
  CU_ASSERT(
      util::streq(StringRef::from_lit("alpha"), StringRef::from_lit("alpha")));
  CU_ASSERT(!util::streq(StringRef::from_lit("alpha"),
                         StringRef::from_lit("alphabravo")));
  CU_ASSERT(!util::streq(StringRef::from_lit("alphabravo"),
                         StringRef::from_lit("alpha")));
  CU_ASSERT(
      !util::streq(StringRef::from_lit("alpha"), StringRef::from_lit("alphA")));
  CU_ASSERT(!util::streq(StringRef{}, StringRef::from_lit("a")));
  CU_ASSERT(util::streq(StringRef{}, StringRef{}));
  CU_ASSERT(!util::streq(StringRef::from_lit("alpha"), StringRef{}));

  CU_ASSERT(
      !util::streq(StringRef::from_lit("alph"), StringRef::from_lit("alpha")));
  CU_ASSERT(
      !util::streq(StringRef::from_lit("alpha"), StringRef::from_lit("alph")));
  CU_ASSERT(
      !util::streq(StringRef::from_lit("alpha"), StringRef::from_lit("alphA")));

  CU_ASSERT(util::streq_l("alpha", "alpha", 5));
  CU_ASSERT(util::streq_l("alpha", "alphabravo", 5));
  CU_ASSERT(!util::streq_l("alpha", "alphabravo", 6));
  CU_ASSERT(!util::streq_l("alphabravo", "alpha", 5));
  CU_ASSERT(!util::streq_l("alpha", "alphA", 5));
  CU_ASSERT(!util::streq_l("", "a", 1));
  CU_ASSERT(util::streq_l("", "", 0));
  CU_ASSERT(!util::streq_l("alpha", "", 0));
}

void test_util_strieq(void) {
  CU_ASSERT(util::strieq(std::string("alpha"), std::string("alpha")));
  CU_ASSERT(util::strieq(std::string("alpha"), std::string("AlPhA")));
  CU_ASSERT(util::strieq(std::string(), std::string()));
  CU_ASSERT(!util::strieq(std::string("alpha"), std::string("AlPhA ")));
  CU_ASSERT(!util::strieq(std::string(), std::string("AlPhA ")));

  CU_ASSERT(
      util::strieq(StringRef::from_lit("alpha"), StringRef::from_lit("alpha")));
  CU_ASSERT(
      util::strieq(StringRef::from_lit("alpha"), StringRef::from_lit("AlPhA")));
  CU_ASSERT(util::strieq(StringRef{}, StringRef{}));
  CU_ASSERT(!util::strieq(StringRef::from_lit("alpha"),
                          StringRef::from_lit("AlPhA ")));
  CU_ASSERT(
      !util::strieq(StringRef::from_lit(""), StringRef::from_lit("AlPhA ")));

  CU_ASSERT(util::strieq_l("alpha", "alpha", 5));
  CU_ASSERT(util::strieq_l("alpha", "AlPhA", 5));
  CU_ASSERT(util::strieq_l("", static_cast<const char *>(nullptr), 0));
  CU_ASSERT(!util::strieq_l("alpha", "AlPhA ", 6));
  CU_ASSERT(!util::strieq_l("", "AlPhA ", 6));

  CU_ASSERT(util::strieq_l("alpha", StringRef::from_lit("alpha")));
  CU_ASSERT(util::strieq_l("alpha", StringRef::from_lit("AlPhA")));
  CU_ASSERT(util::strieq_l("", StringRef{}));
  CU_ASSERT(!util::strieq_l("alpha", StringRef::from_lit("AlPhA ")));
  CU_ASSERT(!util::strieq_l("", StringRef::from_lit("AlPhA ")));
}

void test_util_inp_strlower(void) {
  std::string a("alPha");
  util::inp_strlower(a);
  CU_ASSERT("alpha" == a);

  a = "ALPHA123BRAVO";
  util::inp_strlower(a);
  CU_ASSERT("alpha123bravo" == a);

  a = "";
  util::inp_strlower(a);
  CU_ASSERT("" == a);
}

void test_util_to_base64(void) {
  BlockAllocator balloc(4096, 4096);

  CU_ASSERT("AAA++B/=" ==
            util::to_base64(balloc, StringRef::from_lit("AAA--B_")));
  CU_ASSERT("AAA++B/B" ==
            util::to_base64(balloc, StringRef::from_lit("AAA--B_B")));
}

void test_util_to_token68(void) {
  std::string x = "AAA++B/=";
  util::to_token68(x);
  CU_ASSERT("AAA--B_" == x);

  x = "AAA++B/B";
  util::to_token68(x);
  CU_ASSERT("AAA--B_B" == x);
}

void test_util_percent_encode_token(void) {
  BlockAllocator balloc(4096, 4096);
  CU_ASSERT("h2" ==
            util::percent_encode_token(balloc, StringRef::from_lit("h2")));
  CU_ASSERT("h3~" ==
            util::percent_encode_token(balloc, StringRef::from_lit("h3~")));
  CU_ASSERT("100%25" ==
            util::percent_encode_token(balloc, StringRef::from_lit("100%")));
  CU_ASSERT("http%202" ==
            util::percent_encode_token(balloc, StringRef::from_lit("http 2")));
}

void test_util_percent_decode(void) {
  {
    std::string s = "%66%6F%6f%62%61%72";
    CU_ASSERT("foobar" == util::percent_decode(std::begin(s), std::end(s)));
  }
  {
    std::string s = "%66%6";
    CU_ASSERT("f%6" == util::percent_decode(std::begin(s), std::end(s)));
  }
  {
    std::string s = "%66%";
    CU_ASSERT("f%" == util::percent_decode(std::begin(s), std::end(s)));
  }
  BlockAllocator balloc(1024, 1024);

  CU_ASSERT("foobar" == util::percent_decode(
                            balloc, StringRef::from_lit("%66%6F%6f%62%61%72")));

  CU_ASSERT("f%6" ==
            util::percent_decode(balloc, StringRef::from_lit("%66%6")));

  CU_ASSERT("f%" == util::percent_decode(balloc, StringRef::from_lit("%66%")));
}

void test_util_quote_string(void) {
  BlockAllocator balloc(4096, 4096);
  CU_ASSERT("alpha" ==
            util::quote_string(balloc, StringRef::from_lit("alpha")));
  CU_ASSERT("" == util::quote_string(balloc, StringRef::from_lit("")));
  CU_ASSERT("\\\"alpha\\\"" ==
            util::quote_string(balloc, StringRef::from_lit("\"alpha\"")));
}

void test_util_utox(void) {
  CU_ASSERT("0" == util::utox(0));
  CU_ASSERT("1" == util::utox(1));
  CU_ASSERT("F" == util::utox(15));
  CU_ASSERT("10" == util::utox(16));
  CU_ASSERT("3B9ACA07" == util::utox(1000000007));
  CU_ASSERT("100000000" == util::utox(1LL << 32));
}

void test_util_http_date(void) {
  CU_ASSERT("Thu, 01 Jan 1970 00:00:00 GMT" == util::http_date(0));
  CU_ASSERT("Wed, 29 Feb 2012 09:15:16 GMT" == util::http_date(1330506916));

  std::array<char, 30> http_buf;

  CU_ASSERT("Thu, 01 Jan 1970 00:00:00 GMT" ==
            util::format_http_date(http_buf.data(),
                                   std::chrono::system_clock::time_point()));
  CU_ASSERT("Wed, 29 Feb 2012 09:15:16 GMT" ==
            util::format_http_date(http_buf.data(),
                                   std::chrono::system_clock::time_point(
                                       std::chrono::seconds(1330506916))));
}

void test_util_select_h2(void) {
  const unsigned char *out = nullptr;
  unsigned char outlen = 0;

  // Check single entry and select it.
  const unsigned char t1[] = "\x2h2";
  CU_ASSERT(util::select_h2(&out, &outlen, t1, sizeof(t1) - 1));
  CU_ASSERT(
      memcmp(NGHTTP2_PROTO_VERSION_ID, out, NGHTTP2_PROTO_VERSION_ID_LEN) == 0);
  CU_ASSERT(NGHTTP2_PROTO_VERSION_ID_LEN == outlen);

  out = nullptr;
  outlen = 0;

  // Check the case where id is correct but length is invalid and too
  // long.
  const unsigned char t2[] = "\x6h2-14";
  CU_ASSERT(!util::select_h2(&out, &outlen, t2, sizeof(t2) - 1));

  // Check the case where h2 is located after bogus ID.
  const unsigned char t3[] = "\x2h3\x2h2";
  CU_ASSERT(util::select_h2(&out, &outlen, t3, sizeof(t3) - 1));

  CU_ASSERT(
      memcmp(NGHTTP2_PROTO_VERSION_ID, out, NGHTTP2_PROTO_VERSION_ID_LEN) == 0);
  CU_ASSERT(NGHTTP2_PROTO_VERSION_ID_LEN == outlen);

  out = nullptr;
  outlen = 0;

  // Check the case that last entry's length is invalid and too long.
  const unsigned char t4[] = "\x2h3\x6h2-14";
  CU_ASSERT(!util::select_h2(&out, &outlen, t4, sizeof(t4) - 1));

  // Check the case that all entries are not supported.
  const unsigned char t5[] = "\x2h3\x2h4";
  CU_ASSERT(!util::select_h2(&out, &outlen, t5, sizeof(t5) - 1));

  // Check the case where 2 values are eligible, but last one is
  // picked up because it has precedence over the other.
  const unsigned char t6[] = "\x5h2-14\x5h2-16";
  CU_ASSERT(util::select_h2(&out, &outlen, t6, sizeof(t6) - 1));
  CU_ASSERT(util::streq(NGHTTP2_H2_16, StringRef{out, outlen}));
}

void test_util_ipv6_numeric_addr(void) {
  CU_ASSERT(util::ipv6_numeric_addr("::1"));
  CU_ASSERT(util::ipv6_numeric_addr("2001:0db8:85a3:0042:1000:8a2e:0370:7334"));
  // IPv4
  CU_ASSERT(!util::ipv6_numeric_addr("127.0.0.1"));
  // not numeric address
  CU_ASSERT(!util::ipv6_numeric_addr("localhost"));
}

void test_util_utos(void) {
  uint8_t buf[32];

  CU_ASSERT(("0" == StringRef{buf, util::utos(buf, 0)}));
  CU_ASSERT(("123" == StringRef{buf, util::utos(buf, 123)}));
  CU_ASSERT(("18446744073709551615" ==
             StringRef{buf, util::utos(buf, 18446744073709551615ULL)}));
}

void test_util_make_string_ref_uint(void) {
  BlockAllocator balloc(1024, 1024);

  CU_ASSERT("0" == util::make_string_ref_uint(balloc, 0));
  CU_ASSERT("123" == util::make_string_ref_uint(balloc, 123));
  CU_ASSERT("18446744073709551615" ==
            util::make_string_ref_uint(balloc, 18446744073709551615ULL));
}

void test_util_utos_unit(void) {
  CU_ASSERT("0" == util::utos_unit(0));
  CU_ASSERT("1023" == util::utos_unit(1023));
  CU_ASSERT("1K" == util::utos_unit(1024));
  CU_ASSERT("1K" == util::utos_unit(1025));
  CU_ASSERT("1M" == util::utos_unit(1 << 20));
  CU_ASSERT("1G" == util::utos_unit(1 << 30));
  CU_ASSERT("1024G" == util::utos_unit(1LL << 40));
}

void test_util_utos_funit(void) {
  CU_ASSERT("0" == util::utos_funit(0));
  CU_ASSERT("1023" == util::utos_funit(1023));
  CU_ASSERT("1.00K" == util::utos_funit(1024));
  CU_ASSERT("1.00K" == util::utos_funit(1025));
  CU_ASSERT("1.09K" == util::utos_funit(1119));
  CU_ASSERT("1.27K" == util::utos_funit(1300));
  CU_ASSERT("1.00M" == util::utos_funit(1 << 20));
  CU_ASSERT("1.18M" == util::utos_funit(1234567));
  CU_ASSERT("1.00G" == util::utos_funit(1 << 30));
  CU_ASSERT("4492450797.23G" == util::utos_funit(4823732313248234343LL));
  CU_ASSERT("1024.00G" == util::utos_funit(1LL << 40));
}

void test_util_parse_uint_with_unit(void) {
  CU_ASSERT(0 == util::parse_uint_with_unit("0"));
  CU_ASSERT(1023 == util::parse_uint_with_unit("1023"));
  CU_ASSERT(1024 == util::parse_uint_with_unit("1k"));
  CU_ASSERT(2048 == util::parse_uint_with_unit("2K"));
  CU_ASSERT(1 << 20 == util::parse_uint_with_unit("1m"));
  CU_ASSERT(1 << 21 == util::parse_uint_with_unit("2M"));
  CU_ASSERT(1 << 30 == util::parse_uint_with_unit("1g"));
  CU_ASSERT(1LL << 31 == util::parse_uint_with_unit("2G"));
  CU_ASSERT(9223372036854775807LL ==
            util::parse_uint_with_unit("9223372036854775807"));
  // check overflow case
  CU_ASSERT(-1 == util::parse_uint_with_unit("9223372036854775808"));
  CU_ASSERT(-1 == util::parse_uint_with_unit("10000000000000000000"));
  CU_ASSERT(-1 == util::parse_uint_with_unit("9223372036854775807G"));
  // bad characters
  CU_ASSERT(-1 == util::parse_uint_with_unit("1.1"));
  CU_ASSERT(-1 == util::parse_uint_with_unit("1a"));
  CU_ASSERT(-1 == util::parse_uint_with_unit("a1"));
  CU_ASSERT(-1 == util::parse_uint_with_unit("1T"));
  CU_ASSERT(-1 == util::parse_uint_with_unit(""));
}

void test_util_parse_uint(void) {
  CU_ASSERT(0 == util::parse_uint("0"));
  CU_ASSERT(1023 == util::parse_uint("1023"));
  CU_ASSERT(-1 == util::parse_uint("1k"));
  CU_ASSERT(9223372036854775807LL == util::parse_uint("9223372036854775807"));
  // check overflow case
  CU_ASSERT(-1 == util::parse_uint("9223372036854775808"));
  CU_ASSERT(-1 == util::parse_uint("10000000000000000000"));
  // bad characters
  CU_ASSERT(-1 == util::parse_uint("1.1"));
  CU_ASSERT(-1 == util::parse_uint("1a"));
  CU_ASSERT(-1 == util::parse_uint("a1"));
  CU_ASSERT(-1 == util::parse_uint("1T"));
  CU_ASSERT(-1 == util::parse_uint(""));
}

void test_util_parse_duration_with_unit(void) {
  CU_ASSERT(0. == util::parse_duration_with_unit("0"));
  CU_ASSERT(123. == util::parse_duration_with_unit("123"));
  CU_ASSERT(123. == util::parse_duration_with_unit("123s"));
  CU_ASSERT(0.500 == util::parse_duration_with_unit("500ms"));
  CU_ASSERT(123. == util::parse_duration_with_unit("123S"));
  CU_ASSERT(0.500 == util::parse_duration_with_unit("500MS"));
  CU_ASSERT(180 == util::parse_duration_with_unit("3m"));
  CU_ASSERT(3600 * 5 == util::parse_duration_with_unit("5h"));

  auto err = std::numeric_limits<double>::infinity();
  // check overflow case
  CU_ASSERT(err == util::parse_duration_with_unit("9223372036854775808"));
  // bad characters
  CU_ASSERT(err == util::parse_duration_with_unit("0u"));
  CU_ASSERT(err == util::parse_duration_with_unit("0xs"));
  CU_ASSERT(err == util::parse_duration_with_unit("0mt"));
  CU_ASSERT(err == util::parse_duration_with_unit("0mss"));
  CU_ASSERT(err == util::parse_duration_with_unit("s"));
  CU_ASSERT(err == util::parse_duration_with_unit("ms"));
}

void test_util_duration_str(void) {
  CU_ASSERT("0" == util::duration_str(0.));
  CU_ASSERT("1s" == util::duration_str(1.));
  CU_ASSERT("500ms" == util::duration_str(0.5));
  CU_ASSERT("1500ms" == util::duration_str(1.5));
  CU_ASSERT("2m" == util::duration_str(120.));
  CU_ASSERT("121s" == util::duration_str(121.));
  CU_ASSERT("1h" == util::duration_str(3600.));
}

void test_util_format_duration(void) {
  CU_ASSERT("0us" == util::format_duration(std::chrono::microseconds(0)));
  CU_ASSERT("999us" == util::format_duration(std::chrono::microseconds(999)));
  CU_ASSERT("1.00ms" == util::format_duration(std::chrono::microseconds(1000)));
  CU_ASSERT("1.09ms" == util::format_duration(std::chrono::microseconds(1090)));
  CU_ASSERT("1.01ms" == util::format_duration(std::chrono::microseconds(1009)));
  CU_ASSERT("999.99ms" ==
            util::format_duration(std::chrono::microseconds(999990)));
  CU_ASSERT("1.00s" ==
            util::format_duration(std::chrono::microseconds(1000000)));
  CU_ASSERT("1.05s" ==
            util::format_duration(std::chrono::microseconds(1050000)));

  CU_ASSERT("0us" == util::format_duration(0.));
  CU_ASSERT("999us" == util::format_duration(0.000999));
  CU_ASSERT("1.00ms" == util::format_duration(0.001));
  CU_ASSERT("1.09ms" == util::format_duration(0.00109));
  CU_ASSERT("1.01ms" == util::format_duration(0.001009));
  CU_ASSERT("999.99ms" == util::format_duration(0.99999));
  CU_ASSERT("1.00s" == util::format_duration(1.));
  CU_ASSERT("1.05s" == util::format_duration(1.05));
}

void test_util_starts_with(void) {
  CU_ASSERT(util::starts_with(StringRef::from_lit("foo"),
                              StringRef::from_lit("foo")));
  CU_ASSERT(util::starts_with(StringRef::from_lit("fooo"),
                              StringRef::from_lit("foo")));
  CU_ASSERT(util::starts_with(StringRef::from_lit("ofoo"), StringRef{}));
  CU_ASSERT(!util::starts_with(StringRef::from_lit("ofoo"),
                               StringRef::from_lit("foo")));

  CU_ASSERT(util::istarts_with(StringRef::from_lit("FOO"),
                               StringRef::from_lit("fOO")));
  CU_ASSERT(util::istarts_with(StringRef::from_lit("ofoo"), StringRef{}));
  CU_ASSERT(util::istarts_with(StringRef::from_lit("fOOo"),
                               StringRef::from_lit("Foo")));
  CU_ASSERT(!util::istarts_with(StringRef::from_lit("ofoo"),
                                StringRef::from_lit("foo")));

  CU_ASSERT(util::istarts_with_l(StringRef::from_lit("fOOo"), "Foo"));
  CU_ASSERT(!util::istarts_with_l(StringRef::from_lit("ofoo"), "foo"));
}

void test_util_ends_with(void) {
  CU_ASSERT(
      util::ends_with(StringRef::from_lit("foo"), StringRef::from_lit("foo")));
  CU_ASSERT(util::ends_with(StringRef::from_lit("foo"), StringRef{}));
  CU_ASSERT(
      util::ends_with(StringRef::from_lit("ofoo"), StringRef::from_lit("foo")));
  CU_ASSERT(
      !util::ends_with(StringRef::from_lit("ofoo"), StringRef::from_lit("fo")));

  CU_ASSERT(
      util::iends_with(StringRef::from_lit("fOo"), StringRef::from_lit("Foo")));
  CU_ASSERT(util::iends_with(StringRef::from_lit("foo"), StringRef{}));
  CU_ASSERT(util::iends_with(StringRef::from_lit("oFoo"),
                             StringRef::from_lit("fOO")));
  CU_ASSERT(!util::iends_with(StringRef::from_lit("ofoo"),
                              StringRef::from_lit("fo")));

  CU_ASSERT(util::iends_with_l(StringRef::from_lit("oFoo"), "fOO"));
  CU_ASSERT(!util::iends_with_l(StringRef::from_lit("ofoo"), "fo"));
}

void test_util_parse_http_date(void) {
  CU_ASSERT(1001939696 == util::parse_http_date(StringRef::from_lit(
                              "Mon, 1 Oct 2001 12:34:56 GMT")));
}

void test_util_localtime_date(void) {
  auto tz = getenv("TZ");
  if (tz) {
    tz = strdup(tz);
  }
#ifdef __linux__
  setenv("TZ", "NZST-12:00:00:00", 1);
#else  // !__linux__
  setenv("TZ", ":Pacific/Auckland", 1);
#endif // !__linux__
  tzset();

  CU_ASSERT_STRING_EQUAL("02/Oct/2001:00:34:56 +1200",
                         util::common_log_date(1001939696).c_str());
  CU_ASSERT_STRING_EQUAL("2001-10-02T00:34:56.123+12:00",
                         util::iso8601_date(1001939696000LL + 123).c_str());

  std::array<char, 27> common_buf;

  CU_ASSERT("02/Oct/2001:00:34:56 +1200" ==
            util::format_common_log(common_buf.data(),
                                    std::chrono::system_clock::time_point(
                                        std::chrono::seconds(1001939696))));

  std::array<char, 30> iso8601_buf;

  CU_ASSERT(
      "2001-10-02T00:34:56.123+12:00" ==
      util::format_iso8601(iso8601_buf.data(),
                           std::chrono::system_clock::time_point(
                               std::chrono::milliseconds(1001939696123LL))));

  if (tz) {
    setenv("TZ", tz, 1);
    free(tz);
  } else {
    unsetenv("TZ");
  }
  tzset();
}

void test_util_get_uint64(void) {
  {
    auto v = std::array<unsigned char, 8>{
        {0x01, 0x12, 0x34, 0x56, 0xff, 0x9a, 0xab, 0xbc}};

    auto n = util::get_uint64(v.data());

    CU_ASSERT(0x01123456ff9aabbcULL == n);
  }
  {
    auto v = std::array<unsigned char, 8>{
        {0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff}};

    auto n = util::get_uint64(v.data());

    CU_ASSERT(0xffffffffffffffffULL == n);
  }
}

void test_util_parse_config_str_list(void) {
  auto res = util::parse_config_str_list(StringRef::from_lit("a"));
  CU_ASSERT(1 == res.size());
  CU_ASSERT("a" == res[0]);

  res = util::parse_config_str_list(StringRef::from_lit("a,"));
  CU_ASSERT(2 == res.size());
  CU_ASSERT("a" == res[0]);
  CU_ASSERT("" == res[1]);

  res = util::parse_config_str_list(StringRef::from_lit(":a::"), ':');
  CU_ASSERT(4 == res.size());
  CU_ASSERT("" == res[0]);
  CU_ASSERT("a" == res[1]);
  CU_ASSERT("" == res[2]);
  CU_ASSERT("" == res[3]);

  res = util::parse_config_str_list(StringRef{});
  CU_ASSERT(1 == res.size());
  CU_ASSERT("" == res[0]);

  res = util::parse_config_str_list(StringRef::from_lit("alpha,bravo,charlie"));
  CU_ASSERT(3 == res.size());
  CU_ASSERT("alpha" == res[0]);
  CU_ASSERT("bravo" == res[1]);
  CU_ASSERT("charlie" == res[2]);
}

void test_util_make_http_hostport(void) {
  BlockAllocator balloc(4096, 4096);

  CU_ASSERT("localhost" == util::make_http_hostport(
                               balloc, StringRef::from_lit("localhost"), 80));
  CU_ASSERT("[::1]" ==
            util::make_http_hostport(balloc, StringRef::from_lit("::1"), 443));
  CU_ASSERT(
      "localhost:3000" ==
      util::make_http_hostport(balloc, StringRef::from_lit("localhost"), 3000));
}

void test_util_make_hostport(void) {
  std::array<char, util::max_hostport> hostport_buf;
  CU_ASSERT("localhost:80" ==
            util::make_hostport(std::begin(hostport_buf),
                                StringRef::from_lit("localhost"), 80));
  CU_ASSERT("[::1]:443" == util::make_hostport(std::begin(hostport_buf),
                                               StringRef::from_lit("::1"),
                                               443));

  BlockAllocator balloc(4096, 4096);
  CU_ASSERT("localhost:80" ==
            util::make_hostport(balloc, StringRef::from_lit("localhost"), 80));
  CU_ASSERT("[::1]:443" ==
            util::make_hostport(balloc, StringRef::from_lit("::1"), 443));
}

void test_util_strifind(void) {
  CU_ASSERT(util::strifind(StringRef::from_lit("gzip, deflate, bzip2"),
                           StringRef::from_lit("gzip")));

  CU_ASSERT(util::strifind(StringRef::from_lit("gzip, deflate, bzip2"),
                           StringRef::from_lit("dEflate")));

  CU_ASSERT(util::strifind(StringRef::from_lit("gzip, deflate, bzip2"),
                           StringRef::from_lit("BZIP2")));

  CU_ASSERT(util::strifind(StringRef::from_lit("nghttp2"), StringRef{}));

  // Be aware this fact
  CU_ASSERT(!util::strifind(StringRef{}, StringRef{}));

  CU_ASSERT(!util::strifind(StringRef::from_lit("nghttp2"),
                            StringRef::from_lit("http1")));
}

void test_util_random_alpha_digit(void) {
  std::random_device rd;
  std::mt19937 gen(rd());
  std::array<uint8_t, 19> data;

  auto p = util::random_alpha_digit(std::begin(data), std::end(data), gen);

  CU_ASSERT(std::end(data) == p);

  for (auto b : data) {
    CU_ASSERT(('A' <= b && b <= 'Z') || ('a' <= b && b <= 'z') ||
              ('0' <= b && b <= '9'));
  }
}

void test_util_format_hex(void) {
  BlockAllocator balloc(4096, 4096);

  CU_ASSERT("0ff0" ==
            util::format_hex(balloc, StringRef::from_lit("\x0f\xf0")));
  CU_ASSERT("" == util::format_hex(balloc, StringRef::from_lit("")));
}

void test_util_is_hex_string(void) {
  CU_ASSERT(util::is_hex_string(StringRef{}));
  CU_ASSERT(util::is_hex_string(StringRef::from_lit("0123456789abcdef")));
  CU_ASSERT(util::is_hex_string(StringRef::from_lit("0123456789ABCDEF")));
  CU_ASSERT(!util::is_hex_string(StringRef::from_lit("000")));
  CU_ASSERT(!util::is_hex_string(StringRef::from_lit("XX")));
}

void test_util_decode_hex(void) {
  BlockAllocator balloc(4096, 4096);

  CU_ASSERT("\x0f\xf0" ==
            util::decode_hex(balloc, StringRef::from_lit("0ff0")));
  CU_ASSERT("" == util::decode_hex(balloc, StringRef{}));
}

void test_util_extract_host(void) {
  CU_ASSERT(StringRef::from_lit("foo") ==
            util::extract_host(StringRef::from_lit("foo")));
  CU_ASSERT(StringRef::from_lit("foo") ==
            util::extract_host(StringRef::from_lit("foo:")));
  CU_ASSERT(StringRef::from_lit("foo") ==
            util::extract_host(StringRef::from_lit("foo:0")));
  CU_ASSERT(StringRef::from_lit("[::1]") ==
            util::extract_host(StringRef::from_lit("[::1]")));
  CU_ASSERT(StringRef::from_lit("[::1]") ==
            util::extract_host(StringRef::from_lit("[::1]:")));

  CU_ASSERT(util::extract_host(StringRef::from_lit(":foo")).empty());
  CU_ASSERT(util::extract_host(StringRef::from_lit("[::1")).empty());
  CU_ASSERT(util::extract_host(StringRef::from_lit("[::1]0")).empty());
  CU_ASSERT(util::extract_host(StringRef{}).empty());
}

void test_util_split_hostport(void) {
  CU_ASSERT(std::make_pair(StringRef::from_lit("foo"), StringRef{}) ==
            util::split_hostport(StringRef::from_lit("foo")));
  CU_ASSERT(
      std::make_pair(StringRef::from_lit("foo"), StringRef::from_lit("80")) ==
      util::split_hostport(StringRef::from_lit("foo:80")));
  CU_ASSERT(
      std::make_pair(StringRef::from_lit("::1"), StringRef::from_lit("80")) ==
      util::split_hostport(StringRef::from_lit("[::1]:80")));
  CU_ASSERT(std::make_pair(StringRef::from_lit("::1"), StringRef{}) ==
            util::split_hostport(StringRef::from_lit("[::1]")));

  CU_ASSERT(std::make_pair(StringRef{}, StringRef{}) ==
            util::split_hostport(StringRef{}));
  CU_ASSERT(std::make_pair(StringRef{}, StringRef{}) ==
            util::split_hostport(StringRef::from_lit("[::1]:")));
  CU_ASSERT(std::make_pair(StringRef{}, StringRef{}) ==
            util::split_hostport(StringRef::from_lit("foo:")));
  CU_ASSERT(std::make_pair(StringRef{}, StringRef{}) ==
            util::split_hostport(StringRef::from_lit("[::1:")));
  CU_ASSERT(std::make_pair(StringRef{}, StringRef{}) ==
            util::split_hostport(StringRef::from_lit("[::1]80")));
}

void test_util_split_str(void) {
  CU_ASSERT(std::vector<StringRef>{StringRef::from_lit("")} ==
            util::split_str(StringRef::from_lit(""), ','));
  CU_ASSERT(std::vector<StringRef>{StringRef::from_lit("alpha")} ==
            util::split_str(StringRef::from_lit("alpha"), ','));
  CU_ASSERT((std::vector<StringRef>{StringRef::from_lit("alpha"),
                                    StringRef::from_lit("")}) ==
            util::split_str(StringRef::from_lit("alpha,"), ','));
  CU_ASSERT((std::vector<StringRef>{StringRef::from_lit("alpha"),
                                    StringRef::from_lit("bravo")}) ==
            util::split_str(StringRef::from_lit("alpha,bravo"), ','));
  CU_ASSERT((std::vector<StringRef>{StringRef::from_lit("alpha"),
                                    StringRef::from_lit("bravo"),
                                    StringRef::from_lit("charlie")}) ==
            util::split_str(StringRef::from_lit("alpha,bravo,charlie"), ','));
  CU_ASSERT(
      (std::vector<StringRef>{StringRef::from_lit("alpha"),
                              StringRef::from_lit("bravo"),
                              StringRef::from_lit("charlie")}) ==
      util::split_str(StringRef::from_lit("alpha,bravo,charlie"), ',', 0));
  CU_ASSERT(std::vector<StringRef>{StringRef::from_lit("")} ==
            util::split_str(StringRef::from_lit(""), ',', 1));
  CU_ASSERT(std::vector<StringRef>{StringRef::from_lit("")} ==
            util::split_str(StringRef::from_lit(""), ',', 2));
  CU_ASSERT(
      (std::vector<StringRef>{StringRef::from_lit("alpha"),
                              StringRef::from_lit("bravo,charlie")}) ==
      util::split_str(StringRef::from_lit("alpha,bravo,charlie"), ',', 2));
  CU_ASSERT(std::vector<StringRef>{StringRef::from_lit("alpha")} ==
            util::split_str(StringRef::from_lit("alpha"), ',', 2));
  CU_ASSERT((std::vector<StringRef>{StringRef::from_lit("alpha"),
                                    StringRef::from_lit("")}) ==
            util::split_str(StringRef::from_lit("alpha,"), ',', 2));
  CU_ASSERT(std::vector<StringRef>{StringRef::from_lit("alpha")} ==
            util::split_str(StringRef::from_lit("alpha"), ',', 0));
  CU_ASSERT(
      std::vector<StringRef>{StringRef::from_lit("alpha,bravo,charlie")} ==
      util::split_str(StringRef::from_lit("alpha,bravo,charlie"), ',', 1));
}

void test_util_rstrip(void) {
  BlockAllocator balloc(4096, 4096);

  CU_ASSERT("alpha" == util::rstrip(balloc, StringRef::from_lit("alpha")));
  CU_ASSERT("alpha" == util::rstrip(balloc, StringRef::from_lit("alpha ")));
  CU_ASSERT("alpha" == util::rstrip(balloc, StringRef::from_lit("alpha \t")));
  CU_ASSERT("" == util::rstrip(balloc, StringRef::from_lit("")));
  CU_ASSERT("" == util::rstrip(balloc, StringRef::from_lit("\t\t\t   ")));
}

} // namespace shrpx