nghttp2/src/http2_test.cc

/*
 * 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 "http2_test.h"

#include <cassert>
#include <cstring>
#include <iostream>

#include <CUnit/CUnit.h>

#include "http-parser/http_parser.h"

#include "http2.h"
#include "util.h"

using namespace nghttp2;

#define MAKE_NV(K, V)                                                          \
  {                                                                            \
    (uint8_t *) K, (uint8_t *)V, sizeof(K) - 1, sizeof(V) - 1,                 \
        NGHTTP2_NV_FLAG_NONE                                                   \
  }

namespace shrpx {

namespace {
void check_nv(const Header &a, const nghttp2_nv *b) {
  CU_ASSERT(a.name.size() == b->namelen);
  CU_ASSERT(a.value.size() == b->valuelen);
  CU_ASSERT(memcmp(a.name.c_str(), b->name, b->namelen) == 0);
  CU_ASSERT(memcmp(a.value.c_str(), b->value, b->valuelen) == 0);
}
} // namespace

void test_http2_add_header(void) {
  auto nva = Headers();

  http2::add_header(nva, (const uint8_t *)"alpha", 5, (const uint8_t *)"123", 3,
                    false);
  CU_ASSERT(Headers::value_type("alpha", "123") == nva[0]);
  CU_ASSERT(!nva[0].no_index);

  nva.clear();

  http2::add_header(nva, (const uint8_t *)"alpha", 5, (const uint8_t *)"", 0,
                    true);
  CU_ASSERT(Headers::value_type("alpha", "") == nva[0]);
  CU_ASSERT(nva[0].no_index);

  nva.clear();

  http2::add_header(nva, (const uint8_t *)"a", 1, (const uint8_t *)" b", 2,
                    false);
  CU_ASSERT(Headers::value_type("a", "b") == nva[0]);

  nva.clear();

  http2::add_header(nva, (const uint8_t *)"a", 1, (const uint8_t *)"b ", 2,
                    false);
  CU_ASSERT(Headers::value_type("a", "b") == nva[0]);

  nva.clear();

  http2::add_header(nva, (const uint8_t *)"a", 1, (const uint8_t *)"  b  ", 5,
                    false);
  CU_ASSERT(Headers::value_type("a", "b") == nva[0]);

  nva.clear();

  http2::add_header(nva, (const uint8_t *)"a", 1, (const uint8_t *)"  bravo  ",
                    9, false);
  CU_ASSERT(Headers::value_type("a", "bravo") == nva[0]);

  nva.clear();

  http2::add_header(nva, (const uint8_t *)"a", 1, (const uint8_t *)"    ", 4,
                    false);
  CU_ASSERT(Headers::value_type("a", "") == nva[0]);
}

void test_http2_get_header(void) {
  auto nva = Headers{{"alpha", "1"},
                     {"bravo", "2"},
                     {"bravo", "3"},
                     {"charlie", "4"},
                     {"delta", "5"},
                     {"echo", "6"},
                     {"content-length", "7"}};
  const Headers::value_type *rv;
  rv = http2::get_header(nva, "delta");
  CU_ASSERT(rv != nullptr);
  CU_ASSERT("delta" == rv->name);

  rv = http2::get_header(nva, "bravo");
  CU_ASSERT(rv != nullptr);
  CU_ASSERT("bravo" == rv->name);

  rv = http2::get_header(nva, "foxtrot");
  CU_ASSERT(rv == nullptr);

  http2::HeaderIndex hdidx;
  http2::init_hdidx(hdidx);
  hdidx[http2::HD_CONTENT_LENGTH] = 6;
  rv = http2::get_header(hdidx, http2::HD_CONTENT_LENGTH, nva);
  CU_ASSERT("content-length" == rv->name);
}

namespace {
auto headers = Headers{{"alpha", "0", true},
                       {"bravo", "1"},
                       {"connection", "2"},
                       {"connection", "3"},
                       {"delta", "4"},
                       {"expect", "5"},
                       {"foxtrot", "6"},
                       {"tango", "7"},
                       {"te", "8"},
                       {"te", "9"},
                       {"x-forwarded-proto", "10"},
                       {"x-forwarded-proto", "11"},
                       {"zulu", "12"}};
} // namespace

void test_http2_copy_headers_to_nva(void) {
  std::vector<nghttp2_nv> nva;
  http2::copy_headers_to_nva(nva, headers);
  CU_ASSERT(9 == nva.size());
  auto ans = std::vector<int>{0, 1, 4, 5, 6, 7, 8, 9, 12};
  for (size_t i = 0; i < ans.size(); ++i) {
    check_nv(headers[ans[i]], &nva[i]);

    if (ans[i] == 0) {
      CU_ASSERT(nva[i].flags & NGHTTP2_NV_FLAG_NO_INDEX);
    } else {
      CU_ASSERT(NGHTTP2_NV_FLAG_NONE == nva[i].flags);
    }
  }
}

void test_http2_build_http1_headers_from_headers(void) {
  std::string hdrs;
  http2::build_http1_headers_from_headers(hdrs, headers);
  CU_ASSERT(hdrs == "Alpha: 0\r\n"
                    "Bravo: 1\r\n"
                    "Delta: 4\r\n"
                    "Expect: 5\r\n"
                    "Foxtrot: 6\r\n"
                    "Tango: 7\r\n"
                    "Te: 8\r\n"
                    "Te: 9\r\n"
                    "Zulu: 12\r\n");
}

void test_http2_lws(void) {
  CU_ASSERT(!http2::lws("alpha"));
  CU_ASSERT(http2::lws(" "));
  CU_ASSERT(http2::lws(""));
}

namespace {
void check_rewrite_location_uri(const std::string &new_uri,
                                const std::string &uri,
                                const std::string &req_host,
                                const std::string &upstream_scheme,
                                uint16_t upstream_port) {
  http_parser_url u;
  memset(&u, 0, sizeof(u));
  CU_ASSERT(0 == http_parser_parse_url(uri.c_str(), uri.size(), 0, &u));
  CU_ASSERT(new_uri == http2::rewrite_location_uri(
                           uri, u, req_host, upstream_scheme, upstream_port));
}
} // namespace

void test_http2_rewrite_location_uri(void) {
  check_rewrite_location_uri("https://localhost:3000/alpha?bravo#charlie",
                             "http://localhost:3001/alpha?bravo#charlie",
                             "localhost:3001", "https", 3000);
  check_rewrite_location_uri("https://localhost/", "http://localhost:3001/",
                             "localhost:3001", "https", 443);
  check_rewrite_location_uri("http://localhost/", "http://localhost:3001/",
                             "localhost:3001", "http", 80);
  check_rewrite_location_uri("http://localhost:443/", "http://localhost:3001/",
                             "localhost:3001", "http", 443);
  check_rewrite_location_uri("https://localhost:80/", "http://localhost:3001/",
                             "localhost:3001", "https", 80);
  check_rewrite_location_uri("", "http://localhost:3001/", "127.0.0.1", "https",
                             3000);
  check_rewrite_location_uri("https://localhost:3000/",
                             "http://localhost:3001/", "localhost", "https",
                             3000);
  check_rewrite_location_uri("", "https://localhost:3001/", "localhost",
                             "https", 3000);
  check_rewrite_location_uri("https://localhost:3000/", "http://localhost/",
                             "localhost", "https", 3000);
}

void test_http2_parse_http_status_code(void) {
  CU_ASSERT(200 == http2::parse_http_status_code("200"));
  CU_ASSERT(102 == http2::parse_http_status_code("102"));
  CU_ASSERT(-1 == http2::parse_http_status_code("099"));
  CU_ASSERT(-1 == http2::parse_http_status_code("99"));
  CU_ASSERT(-1 == http2::parse_http_status_code("-1"));
  CU_ASSERT(-1 == http2::parse_http_status_code("20a"));
  CU_ASSERT(-1 == http2::parse_http_status_code(""));
}

void test_http2_index_header(void) {
  http2::HeaderIndex hdidx;
  http2::init_hdidx(hdidx);

  http2::index_header(hdidx, http2::HD__AUTHORITY, 0);
  http2::index_header(hdidx, -1, 1);

  CU_ASSERT(0 == hdidx[http2::HD__AUTHORITY]);
}

void test_http2_lookup_token(void) {
  CU_ASSERT(http2::HD__AUTHORITY == http2::lookup_token(":authority"));
  CU_ASSERT(-1 == http2::lookup_token(":authorit"));
  CU_ASSERT(-1 == http2::lookup_token(":Authority"));
  CU_ASSERT(http2::HD_EXPECT == http2::lookup_token("expect"));
}

void test_http2_check_http2_pseudo_header(void) {
  http2::HeaderIndex hdidx;
  http2::init_hdidx(hdidx);

  CU_ASSERT(http2::check_http2_request_pseudo_header(hdidx, http2::HD__METHOD));
  hdidx[http2::HD__PATH] = 0;
  CU_ASSERT(http2::check_http2_request_pseudo_header(hdidx, http2::HD__METHOD));
  hdidx[http2::HD__METHOD] = 1;
  CU_ASSERT(
      !http2::check_http2_request_pseudo_header(hdidx, http2::HD__METHOD));
  CU_ASSERT(!http2::check_http2_request_pseudo_header(hdidx, http2::HD_VIA));

  http2::init_hdidx(hdidx);

  CU_ASSERT(
      http2::check_http2_response_pseudo_header(hdidx, http2::HD__STATUS));
  hdidx[http2::HD__STATUS] = 0;
  CU_ASSERT(
      !http2::check_http2_response_pseudo_header(hdidx, http2::HD__STATUS));
  CU_ASSERT(!http2::check_http2_response_pseudo_header(hdidx, http2::HD_VIA));
}

void test_http2_http2_header_allowed(void) {
  CU_ASSERT(http2::http2_header_allowed(http2::HD__PATH));
  CU_ASSERT(http2::http2_header_allowed(http2::HD_CONTENT_LENGTH));
  CU_ASSERT(!http2::http2_header_allowed(http2::HD_CONNECTION));
}

void test_http2_mandatory_request_headers_presence(void) {
  http2::HeaderIndex hdidx;
  http2::init_hdidx(hdidx);

  CU_ASSERT(!http2::http2_mandatory_request_headers_presence(hdidx));
  hdidx[http2::HD__AUTHORITY] = 0;
  CU_ASSERT(!http2::http2_mandatory_request_headers_presence(hdidx));
  hdidx[http2::HD__METHOD] = 1;
  CU_ASSERT(!http2::http2_mandatory_request_headers_presence(hdidx));
  hdidx[http2::HD__PATH] = 2;
  CU_ASSERT(!http2::http2_mandatory_request_headers_presence(hdidx));
  hdidx[http2::HD__SCHEME] = 3;
  CU_ASSERT(http2::http2_mandatory_request_headers_presence(hdidx));

  hdidx[http2::HD__AUTHORITY] = -1;
  hdidx[http2::HD_HOST] = 0;
  CU_ASSERT(http2::http2_mandatory_request_headers_presence(hdidx));
}

void test_http2_parse_link_header(void) {
  {
    // only URI appears; we don't extract URI unless it bears rel=preload
    const char s[] = "<url>";
    auto res = http2::parse_link_header(s, sizeof(s) - 1);
    CU_ASSERT(0 == res.size());
  }
  {
    // URI url should be extracted
    const char s[] = "<url>; rel=preload";
    auto res = http2::parse_link_header(s, sizeof(s) - 1);
    CU_ASSERT(1 == res.size());
    CU_ASSERT(std::make_pair(&s[1], &s[4]) == res[0].url);
  }
  {
    // With extra link-param.  URI url should be extracted
    const char s[] = "<url>; rel=preload; as=file";
    auto res = http2::parse_link_header(s, sizeof(s) - 1);
    CU_ASSERT(1 == res.size());
    CU_ASSERT(std::make_pair(&s[1], &s[4]) == res[0].url);
  }
  {
    // With extra link-param.  URI url should be extracted
    const char s[] = "<url>; as=file; rel=preload";
    auto res = http2::parse_link_header(s, sizeof(s) - 1);
    CU_ASSERT(1 == res.size());
    CU_ASSERT(std::make_pair(&s[1], &s[4]) == res[0].url);
  }
  {
    // With extra link-param and quote-string.  URI url should be
    // extracted
    const char s[] = R"(<url>; rel=preload; title="foo,bar")";
    auto res = http2::parse_link_header(s, sizeof(s) - 1);
    CU_ASSERT(1 == res.size());
    CU_ASSERT(std::make_pair(&s[1], &s[4]) == res[0].url);
  }
  {
    // With extra link-param and quote-string.  URI url should be
    // extracted
    const char s[] = R"(<url>; title="foo,bar"; rel=preload)";
    auto res = http2::parse_link_header(s, sizeof(s) - 1);
    CU_ASSERT(1 == res.size());
    CU_ASSERT(std::make_pair(&s[1], &s[4]) == res[0].url);
  }
  {
    // ',' after quote-string
    const char s[] = R"(<url>; title="foo,bar", <url>; rel=preload)";
    auto res = http2::parse_link_header(s, sizeof(s) - 1);
    CU_ASSERT(1 == res.size());
    CU_ASSERT(std::make_pair(&s[25], &s[28]) == res[0].url);
  }
  {
    // Only first URI should be extracted.
    const char s[] = "<url>; rel=preload, <url>";
    auto res = http2::parse_link_header(s, sizeof(s) - 1);
    CU_ASSERT(1 == res.size());
    CU_ASSERT(std::make_pair(&s[1], &s[4]) == res[0].url);
  }
  {
    // Both have rel=preload, so both urls should be extracted
    const char s[] = "<url>; rel=preload, <url>; rel=preload";
    auto res = http2::parse_link_header(s, sizeof(s) - 1);
    CU_ASSERT(2 == res.size());
    CU_ASSERT(std::make_pair(&s[1], &s[4]) == res[0].url);
    CU_ASSERT(std::make_pair(&s[21], &s[24]) == res[1].url);
  }
  {
    // Second URI uri should be extracted.
    const char s[] = "<url>, <url>;rel=preload";
    auto res = http2::parse_link_header(s, sizeof(s) - 1);
    CU_ASSERT(1 == res.size());
    CU_ASSERT(std::make_pair(&s[8], &s[11]) == res[0].url);
  }
  {
    // Error if input ends with ';'
    const char s[] = "<url>;rel=preload;";
    auto res = http2::parse_link_header(s, sizeof(s) - 1);
    CU_ASSERT(0 == res.size());
  }
  {
    // OK if input ends with ','
    const char s[] = "<url>;rel=preload,";
    auto res = http2::parse_link_header(s, sizeof(s) - 1);
    CU_ASSERT(1 == res.size());
    CU_ASSERT(std::make_pair(&s[1], &s[4]) == res[0].url);
  }
  {
    // Multiple repeated ','s between fields is OK
    const char s[] = "<url>,,,<url>;rel=preload";
    auto res = http2::parse_link_header(s, sizeof(s) - 1);
    CU_ASSERT(1 == res.size());
    CU_ASSERT(std::make_pair(&s[9], &s[12]) == res[0].url);
  }
  {
    // Error if url is not enclosed by <>
    const char s[] = "url>;rel=preload;";
    auto res = http2::parse_link_header(s, sizeof(s) - 1);
    CU_ASSERT(0 == res.size());
  }
  {
    // Error if url is not enclosed by <>
    const char s[] = "<url;rel=preload;";
    auto res = http2::parse_link_header(s, sizeof(s) - 1);
    CU_ASSERT(0 == res.size());
  }
  {
    // Empty parameter value is not allowed
    const char s[] = "<url>;rel=preload; as=";
    auto res = http2::parse_link_header(s, sizeof(s) - 1);
    CU_ASSERT(0 == res.size());
  }
  {
    // Empty parameter value is not allowed
    const char s[] = "<url>;as=;rel=preload";
    auto res = http2::parse_link_header(s, sizeof(s) - 1);
    CU_ASSERT(0 == res.size());
  }
  {
    // Empty parameter value is not allowed
    const char s[] = "<url>;as=, <url>;rel=preload";
    auto res = http2::parse_link_header(s, sizeof(s) - 1);
    CU_ASSERT(0 == res.size());
  }
  {
    // Empty parameter name is not allowed
    const char s[] = "<url>; =file; rel=preload";
    auto res = http2::parse_link_header(s, sizeof(s) - 1);
    CU_ASSERT(0 == res.size());
  }
  {
    // Without whitespaces
    const char s[] = "<url>;as=file;rel=preload,<url>;rel=preload";
    auto res = http2::parse_link_header(s, sizeof(s) - 1);
    CU_ASSERT(2 == res.size());
    CU_ASSERT(std::make_pair(&s[1], &s[4]) == res[0].url);
    CU_ASSERT(std::make_pair(&s[27], &s[30]) == res[1].url);
  }
  {
    // link-extension may have no value
    const char s[] = "<url>; as; rel=preload";
    auto res = http2::parse_link_header(s, sizeof(s) - 1);
    CU_ASSERT(1 == res.size());
    CU_ASSERT(std::make_pair(&s[1], &s[4]) == res[0].url);
  }
  {
    // ext-name-star
    const char s[] = "<url>; foo*=bar; rel=preload";
    auto res = http2::parse_link_header(s, sizeof(s) - 1);
    CU_ASSERT(1 == res.size());
    CU_ASSERT(std::make_pair(&s[1], &s[4]) == res[0].url);
  }
  {
    // '*' is not allowed expect for trailing one
    const char s[] = "<url>; *=bar; rel=preload";
    auto res = http2::parse_link_header(s, sizeof(s) - 1);
    CU_ASSERT(0 == res.size());
  }
  {
    // '*' is not allowed expect for trailing one
    const char s[] = "<url>; foo*bar=buzz; rel=preload";
    auto res = http2::parse_link_header(s, sizeof(s) - 1);
    CU_ASSERT(0 == res.size());
  }
  {
    // ext-name-star must be followed by '='
    const char s[] = "<url>; foo*; rel=preload";
    auto res = http2::parse_link_header(s, sizeof(s) - 1);
    CU_ASSERT(0 == res.size());
  }
  {
    // '>' is not followed by ';'
    const char s[] = "<url> rel=preload";
    auto res = http2::parse_link_header(s, sizeof(s) - 1);
    CU_ASSERT(0 == res.size());
  }
  {
    // Starting with whitespace is no problem.
    const char s[] = "  <url>; rel=preload";
    auto res = http2::parse_link_header(s, sizeof(s) - 1);
    CU_ASSERT(1 == res.size());
    CU_ASSERT(std::make_pair(&s[3], &s[6]) == res[0].url);
  }
}

void test_http2_path_join(void) {
  {
    const char base[] = "/";
    const char rel[] = "/";
    CU_ASSERT("/" == http2::path_join(base, sizeof(base) - 1, nullptr, 0, rel,
                                      sizeof(rel) - 1, nullptr, 0));
  }
  {
    const char base[] = "/";
    const char rel[] = "/alpha";
    CU_ASSERT("/alpha" == http2::path_join(base, sizeof(base) - 1, nullptr, 0,
                                           rel, sizeof(rel) - 1, nullptr, 0));
  }
  {
    // rel ends with trailing '/'
    const char base[] = "/";
    const char rel[] = "/alpha/";
    CU_ASSERT("/alpha/" == http2::path_join(base, sizeof(base) - 1, nullptr, 0,
                                            rel, sizeof(rel) - 1, nullptr, 0));
  }
  {
    // rel contains multiple components
    const char base[] = "/";
    const char rel[] = "/alpha/bravo";
    CU_ASSERT("/alpha/bravo" == http2::path_join(base, sizeof(base) - 1,
                                                 nullptr, 0, rel,
                                                 sizeof(rel) - 1, nullptr, 0));
  }
  {
    // rel is relative
    const char base[] = "/";
    const char rel[] = "alpha/bravo";
    CU_ASSERT("/alpha/bravo" == http2::path_join(base, sizeof(base) - 1,
                                                 nullptr, 0, rel,
                                                 sizeof(rel) - 1, nullptr, 0));
  }
  {
    // rel is relative
    const char base[] = "/alpha";
    const char rel[] = "bravo/charlie";
    CU_ASSERT("/bravo/charlie" ==
              http2::path_join(base, sizeof(base) - 1, nullptr, 0, rel,
                               sizeof(rel) - 1, nullptr, 0));
  }
  {
    // rel contains repeated '/'s
    const char base[] = "/";
    const char rel[] = "/alpha/////bravo/////";
    CU_ASSERT("/alpha/bravo/" == http2::path_join(base, sizeof(base) - 1,
                                                  nullptr, 0, rel,
                                                  sizeof(rel) - 1, nullptr, 0));
  }
  {
    // base ends with '/', so '..' eats 'bravo'
    const char base[] = "/alpha/bravo/";
    const char rel[] = "../charlie/delta";
    CU_ASSERT("/alpha/charlie/delta" ==
              http2::path_join(base, sizeof(base) - 1, nullptr, 0, rel,
                               sizeof(rel) - 1, nullptr, 0));
  }
  {
    // base does not end with '/', so '..' eats 'alpha/bravo'
    const char base[] = "/alpha/bravo";
    const char rel[] = "../charlie";
    CU_ASSERT("/charlie" == http2::path_join(base, sizeof(base) - 1, nullptr, 0,
                                             rel, sizeof(rel) - 1, nullptr, 0));
  }
  {
    // 'charlie' is eaten by following '..'
    const char base[] = "/alpha/bravo/";
    const char rel[] = "../charlie/../delta";
    CU_ASSERT("/alpha/delta" == http2::path_join(base, sizeof(base) - 1,
                                                 nullptr, 0, rel,
                                                 sizeof(rel) - 1, nullptr, 0));
  }
  {
    // excessive '..' results in '/'
    const char base[] = "/alpha/bravo/";
    const char rel[] = "../../../";
    CU_ASSERT("/" == http2::path_join(base, sizeof(base) - 1, nullptr, 0, rel,
                                      sizeof(rel) - 1, nullptr, 0));
  }
  {
    // excessive '..'  and  path component
    const char base[] = "/alpha/bravo/";
    const char rel[] = "../../../charlie";
    CU_ASSERT("/charlie" == http2::path_join(base, sizeof(base) - 1, nullptr, 0,
                                             rel, sizeof(rel) - 1, nullptr, 0));
  }
  {
    // rel ends with '..'
    const char base[] = "/alpha/bravo/";
    const char rel[] = "charlie/..";
    CU_ASSERT("/alpha/bravo/" == http2::path_join(base, sizeof(base) - 1,
                                                  nullptr, 0, rel,
                                                  sizeof(rel) - 1, nullptr, 0));
  }
  {
    // base empty and rel contains '..'
    const char base[] = "";
    const char rel[] = "charlie/..";
    CU_ASSERT("/" == http2::path_join(base, sizeof(base) - 1, nullptr, 0, rel,
                                      sizeof(rel) - 1, nullptr, 0));
  }
  {
    // '.' is ignored
    const char base[] = "/";
    const char rel[] = "charlie/././././delta";
    CU_ASSERT("/charlie/delta" ==
              http2::path_join(base, sizeof(base) - 1, nullptr, 0, rel,
                               sizeof(rel) - 1, nullptr, 0));
  }
  {
    // '.' is ignored
    const char base[] = "/";
    const char rel[] = "charlie/.";
    CU_ASSERT("/charlie/" == http2::path_join(base, sizeof(base) - 1, nullptr,
                                              0, rel, sizeof(rel) - 1, nullptr,
                                              0));
  }
  {
    // query
    const char base[] = "/";
    const char rel[] = "/";
    const char relq[] = "q";
    CU_ASSERT("/?q" == http2::path_join(base, sizeof(base) - 1, nullptr, 0, rel,
                                        sizeof(rel) - 1, relq,
                                        sizeof(relq) - 1));
  }
  {
    // empty rel and query
    const char base[] = "/alpha";
    const char rel[] = "";
    const char relq[] = "q";
    CU_ASSERT("/alpha?q" == http2::path_join(base, sizeof(base) - 1, nullptr, 0,
                                             rel, sizeof(rel) - 1, relq,
                                             sizeof(relq) - 1));
  }
  {
    // both rel and query are empty
    const char base[] = "/alpha";
    const char baseq[] = "r";
    const char rel[] = "";
    const char relq[] = "";
    CU_ASSERT("/alpha?r" ==
              http2::path_join(base, sizeof(base) - 1, baseq, sizeof(baseq) - 1,
                               rel, sizeof(rel) - 1, relq, sizeof(relq) - 1));
  }
  {
    // empty base
    const char base[] = "";
    const char rel[] = "/alpha";
    CU_ASSERT("/alpha" == http2::path_join(base, sizeof(base) - 1, nullptr, 0,
                                           rel, sizeof(rel) - 1, nullptr, 0));
  }
  {
    // everything is empty
    CU_ASSERT("/" ==
              http2::path_join(nullptr, 0, nullptr, 0, nullptr, 0, nullptr, 0));
  }
  {
    // only baseq is not empty
    const char base[] = "";
    const char baseq[] = "r";
    const char rel[] = "";
    CU_ASSERT("/?r" == http2::path_join(base, sizeof(base) - 1, baseq,
                                        sizeof(baseq) - 1, rel, sizeof(rel) - 1,
                                        nullptr, 0));
  }
}

} // namespace shrpx