src/crow_test.cpp

#include "crow.h"
#include <iostream>
#include <sstream>
#include <vector>
#include "gtest/gtest.h"
#undef CROW_LOG_LEVEL
#define CROW_LOG_LEVEL 0

using namespace std;
using namespace crow;

bool failed__ = false;
void error_print() { cerr << endl; }

template <typename A, typename... Args>
void error_print(const A& a, Args... args) {
  cerr << a;
  error_print(args...);
}

template <typename... Args>
void fail(Args... args) {
  error_print(args...);
  failed__ = true;
}

#define ASSERT_EQUAL(a, b)                                                  \
  if ((a) != (b))                                                           \
  fail(__FILE__ ":", __LINE__, ": Assert fail: expected ", (a), " actual ", \
       (b), ", " #a " == " #b ", at " __FILE__ ":", __LINE__)
#define ASSERT_NOTEQUAL(a, b)                                       \
  if ((a) == (b))                                                   \
  fail(__FILE__ ":", __LINE__, ": Assert fail: not expected ", (a), \
       ", " #a " != " #b ", at " __FILE__ ":", __LINE__)

#define DISABLE_TEST(x) \
  struct test##x {      \
    void test();        \
  } x##_;               \
  void test##x::test()

#define LOCALHOST_ADDRESS "127.0.0.1"

TEST(Crow, Rule) {
  TaggedRule<> r("/http/");
  r.name("abc");

  // empty handler - fail to validate
  try {
    r.validate();
    fail("empty handler should fail to validate");
  } catch (runtime_error& e) {
  }

  int x = 0;

  // registering handler
  r([&x] {
    x = 1;
    return "";
  });

  r.validate();

  response res;

  // executing handler
  ASSERT_EQUAL(0, x);
  boost::beast::http::request<boost::beast::http::string_body> req{};
  r.handle(request(req), res, routing_params());
  ASSERT_EQUAL(1, x);

  // registering handler with request argument
  r([&x](const crow::request&) {
    x = 2;
    return "";
  });

  r.validate();

  // executing handler
  ASSERT_EQUAL(1, x);
  r.handle(request(req), res, routing_params());
  ASSERT_EQUAL(2, x);
}

TEST(Crow, ParameterTagging) {
  static_assert(black_magic::is_valid("<int><int><int>"), "valid url");
  static_assert(!black_magic::is_valid("<int><int<<int>"), "invalid url");
  static_assert(!black_magic::is_valid("nt>"), "invalid url");
  ASSERT_EQUAL(1, black_magic::get_parameter_tag("<int>"));
  ASSERT_EQUAL(2, black_magic::get_parameter_tag("<uint>"));
  ASSERT_EQUAL(3, black_magic::get_parameter_tag("<float>"));
  ASSERT_EQUAL(3, black_magic::get_parameter_tag("<double>"));
  ASSERT_EQUAL(4, black_magic::get_parameter_tag("<str>"));
  ASSERT_EQUAL(4, black_magic::get_parameter_tag("<string>"));
  ASSERT_EQUAL(5, black_magic::get_parameter_tag("<path>"));
  ASSERT_EQUAL(6 * 6 + 6 + 1,
               black_magic::get_parameter_tag("<int><int><int>"));
  ASSERT_EQUAL(6 * 6 + 6 + 2,
               black_magic::get_parameter_tag("<uint><int><int>"));
  ASSERT_EQUAL(6 * 6 + 6 * 3 + 2,
               black_magic::get_parameter_tag("<uint><double><int>"));

  // url definition parsed in compile time, build into *one number*, and given
  // to template argument
  static_assert(
      std::is_same<black_magic::S<uint64_t, double, int64_t>,
                   black_magic::arguments<6 * 6 + 6 * 3 + 2>::type>::value,
      "tag to type container");
}

TEST(Crow, PathRouting) {
  SimpleApp app;

  CROW_ROUTE(app, "/file")
  ([] { return "file"; });

  CROW_ROUTE(app, "/path/")
  ([] { return "path"; });

  {
    boost::beast::http::request<boost::beast::http::string_body> r{};
    request req{r};
    response res;

    req.url = "/file";

    app.handle(req, res);

    ASSERT_EQUAL(200, res.result_int());
  }
  {
    boost::beast::http::request<boost::beast::http::string_body> r{};
    request req{r};
    response res;

    req.url = "/file/";

    app.handle(req, res);
    ASSERT_EQUAL(404, res.result_int());
  }
  {
    boost::beast::http::request<boost::beast::http::string_body> r{};
    request req{r};
    response res;

    req.url = "/path";

    app.handle(req, res);
    ASSERT_NOTEQUAL(404, res.result_int());
  }
  {
    boost::beast::http::request<boost::beast::http::string_body> r{};
    request req{r};
    response res;

    req.url = "/path/";

    app.handle(req, res);
    ASSERT_EQUAL(200, res.result_int());
  }
}

TEST(Crow, RoutingTest) {
  SimpleApp app;
  int A{};
  uint32_t B{};
  double C{};
  string D{};
  string E{};

  CROW_ROUTE(app, "/0/<uint>")
  ([&](uint32_t b) {
    B = b;
    return "OK";
  });

  CROW_ROUTE(app, "/1/<int>/<uint>")
  ([&](int a, uint32_t b) {
    A = a;
    B = b;
    return "OK";
  });

  CROW_ROUTE(app, "/4/<int>/<uint>/<double>/<string>")
  ([&](int a, uint32_t b, double c, string d) {
    A = a;
    B = b;
    C = c;
    D = d;
    return "OK";
  });

  CROW_ROUTE(app, "/5/<int>/<uint>/<double>/<string>/<path>")
  ([&](int a, uint32_t b, double c, string d, string e) {
    A = a;
    B = b;
    C = c;
    D = d;
    E = e;
    return "OK";
  });

  app.validate();
  // app.debug_print();
  {
    boost::beast::http::request<boost::beast::http::string_body> r{};
    request req{r};
    response res;

    req.url = "/-1";

    app.handle(req, res);

    ASSERT_EQUAL(404, res.result_int());
  }

  {
    boost::beast::http::request<boost::beast::http::string_body> r{};
    request req{r};
    response res;

    req.url = "/0/1001999";

    app.handle(req, res);

    ASSERT_EQUAL(200, res.result_int());

    ASSERT_EQUAL(1001999, B);
  }

  {
    boost::beast::http::request<boost::beast::http::string_body> r{};
    request req{r};
    response res;

    req.url = "/1/-100/1999";

    app.handle(req, res);

    ASSERT_EQUAL(200, res.result_int());

    ASSERT_EQUAL(-100, A);
    ASSERT_EQUAL(1999, B);
  }
  {
    boost::beast::http::request<boost::beast::http::string_body> r{};
    request req{r};
    response res;

    req.url = "/4/5000/3/-2.71828/hellhere";

    app.handle(req, res);

    ASSERT_EQUAL(200, res.result_int());

    ASSERT_EQUAL(5000, A);
    ASSERT_EQUAL(3, B);
    ASSERT_EQUAL(-2.71828, C);
    ASSERT_EQUAL("hellhere", D);
  }
  {
    boost::beast::http::request<boost::beast::http::string_body> r{};
    request req{r};
    response res;

    req.url = "/5/-5/999/3.141592/hello_there/a/b/c/d";

    app.handle(req, res);

    ASSERT_EQUAL(200, res.result_int());

    ASSERT_EQUAL(-5, A);
    ASSERT_EQUAL(999, B);
    ASSERT_EQUAL(3.141592, C);
    ASSERT_EQUAL("hello_there", D);
    ASSERT_EQUAL("a/b/c/d", E);
  }
}

TEST(Crow, simple_response_routing_params) {
  ASSERT_EQUAL(100,
               response(boost::beast::http::status::continue_).result_int());
  ASSERT_EQUAL(200, response("Hello there").result_int());
  ASSERT_EQUAL(500, response(boost::beast::http::status::internal_server_error,
                             "Internal Error?")
                        .result_int());

  routing_params rp;
  rp.int_params.push_back(1);
  rp.int_params.push_back(5);
  rp.uint_params.push_back(2);
  rp.double_params.push_back(3);
  rp.string_params.push_back("hello");
  ASSERT_EQUAL(1, rp.get<int64_t>(0));
  ASSERT_EQUAL(5, rp.get<int64_t>(1));
  ASSERT_EQUAL(2, rp.get<uint64_t>(0));
  ASSERT_EQUAL(3, rp.get<double>(0));
  ASSERT_EQUAL("hello", rp.get<string>(0));
}

TEST(Crow, handler_with_response) {
  SimpleApp app;
  CROW_ROUTE(app, "/")([](const crow::request&, crow::response&) {});
}

TEST(Crow, http_method) {
  SimpleApp app;

  CROW_ROUTE(app, "/").methods("POST"_method,
                               "GET"_method)([](const request& req) {
    if (req.method() == "GET"_method)
      return "2";
    else
      return "1";
  });

  CROW_ROUTE(app, "/get_only")
      .methods("GET"_method)([](const request& /*req*/) { return "get"; });
  CROW_ROUTE(app, "/post_only")
      .methods("POST"_method)([](const request& /*req*/) { return "post"; });

  // cannot have multiple handlers for the same url
  // CROW_ROUTE(app, "/")
  //.methods("GET"_method)
  //([]{ return "2"; });

  {
    boost::beast::http::request<boost::beast::http::string_body> r{};
    request req{r};
    response res;

    req.url = "/";
    app.handle(req, res);

    ASSERT_EQUAL("2", res.body());
  }
  {
    boost::beast::http::request<boost::beast::http::string_body> r{};
    request req{r};
    response res;

    req.url = "/";
    r.method("POST"_method);
    app.handle(req, res);

    ASSERT_EQUAL("1", res.body());
  }

  {
    boost::beast::http::request<boost::beast::http::string_body> r{};
    request req{r};
    response res;

    req.url = "/get_only";
    app.handle(req, res);

    ASSERT_EQUAL("get", res.body());
  }

  {
    boost::beast::http::request<boost::beast::http::string_body> r{};
    request req{r};
    response res;

    req.url = "/get_only";
    r.method("POST"_method);
    app.handle(req, res);

    ASSERT_NOTEQUAL("get", res.body());
  }
}

TEST(Crow, server_handling_error_request) {
  static char buf[2048];
  SimpleApp app;
  CROW_ROUTE(app, "/")([] { return "A"; });
  Server<SimpleApp> server(&app, LOCALHOST_ADDRESS, 45451);
  auto _ = async(launch::async, [&] { server.run(); });
  std::string sendmsg = "POX";
  asio::io_service is;
  {
    asio::ip::tcp::socket c(is);
    c.connect(asio::ip::tcp::endpoint(
        asio::ip::address::from_string(LOCALHOST_ADDRESS), 45451));

    c.send(asio::buffer(sendmsg));

    try {
      c.receive(asio::buffer(buf, 2048));
      fail();
    } catch (std::exception& e) {
      // std::cerr << e.what() << std::endl;
    }
  }
  server.stop();
}

TEST(Crow, multi_server) {
  static char buf[2048];
  SimpleApp app1, app2;
  CROW_ROUTE(app1, "/").methods("GET"_method,
                                "POST"_method)([] { return "A"; });
  CROW_ROUTE(app2, "/").methods("GET"_method,
                                "POST"_method)([] { return "B"; });

  Server<SimpleApp> server1(&app1, LOCALHOST_ADDRESS, 45451);
  Server<SimpleApp> server2(&app2, LOCALHOST_ADDRESS, 45452);

  auto _ = async(launch::async, [&] { server1.run(); });
  auto _2 = async(launch::async, [&] { server2.run(); });

  std::string sendmsg =
      "POST /\r\nContent-Length:3\r\nX-HeaderTest: 123\r\n\r\nA=B\r\n";
  asio::io_service is;
  {
    asio::ip::tcp::socket c(is);
    c.connect(asio::ip::tcp::endpoint(
        asio::ip::address::from_string(LOCALHOST_ADDRESS), 45451));

    c.send(asio::buffer(sendmsg));

    size_t recved = c.receive(asio::buffer(buf, 2048));
    ASSERT_EQUAL('A', buf[recved - 1]);
  }

  {
    asio::ip::tcp::socket c(is);
    c.connect(asio::ip::tcp::endpoint(
        asio::ip::address::from_string(LOCALHOST_ADDRESS), 45452));

    for (auto ch : sendmsg) {
      char buf[1] = {ch};
      c.send(asio::buffer(buf));
    }

    size_t recved = c.receive(asio::buffer(buf, 2048));
    ASSERT_EQUAL('B', buf[recved - 1]);
  }

  server1.stop();
  server2.stop();
}

TEST(Crow, black_magic) {
  using namespace black_magic;
  static_assert(
      std::is_same<void, last_element_type<int, char, void>::type>::value,
      "last_element_type");
  static_assert(std::is_same<char, pop_back<int, char, void>::rebind<
                                       last_element_type>::type>::value,
                "pop_back");
  static_assert(
      std::is_same<int, pop_back<int, char, void>::rebind<pop_back>::rebind<
                            last_element_type>::type>::value,
      "pop_back");
}

struct NullMiddleware {
  struct context {};

  template <typename AllContext>
  void before_handle(request&, response&, context&, AllContext&) {}

  template <typename AllContext>
  void after_handle(request&, response&, context&, AllContext&) {}
};

struct NullSimpleMiddleware {
  struct context {};

  void before_handle(request& /*req*/, response& /*res*/, context& /*ctx*/) {}

  void after_handle(request& /*req*/, response& /*res*/, context& /*ctx*/) {}
};

TEST(Crow, middleware_simple) {
  App<NullMiddleware, NullSimpleMiddleware> app;
  decltype(app)::server_t server(&app, LOCALHOST_ADDRESS, 45451);
  CROW_ROUTE(app, "/")
  ([&](const crow::request& req) {
    app.get_context<NullMiddleware>(req);
    app.get_context<NullSimpleMiddleware>(req);
    return "";
  });
}

struct IntSettingMiddleware {
  struct context {
    int val;
  };

  template <typename AllContext>
  void before_handle(request&, response&, context& ctx, AllContext&) {
    ctx.val = 1;
  }

  template <typename AllContext>
  void after_handle(request&, response&, context& ctx, AllContext&) {
    ctx.val = 2;
  }
};

std::vector<std::string> test_middleware_context_vector;

struct FirstMW {
  struct context {
    std::vector<string> v;
  };

  void before_handle(request& /*req*/, response& /*res*/, context& ctx) {
    ctx.v.push_back("1 before");
  }

  void after_handle(request& /*req*/, response& /*res*/, context& ctx) {
    ctx.v.push_back("1 after");
    test_middleware_context_vector = ctx.v;
  }
};

struct SecondMW {
  struct context {};
  template <typename AllContext>
  void before_handle(request& req, response& res, context&,
                     AllContext& all_ctx) {
    all_ctx.template get<FirstMW>().v.push_back("2 before");
    if (req.url == "/break") res.end();
  }

  template <typename AllContext>
  void after_handle(request&, response&, context&, AllContext& all_ctx) {
    all_ctx.template get<FirstMW>().v.push_back("2 after");
  }
};

struct ThirdMW {
  struct context {};
  template <typename AllContext>
  void before_handle(request&, response&, context&, AllContext& all_ctx) {
    all_ctx.template get<FirstMW>().v.push_back("3 before");
  }

  template <typename AllContext>
  void after_handle(request&, response&, context&, AllContext& all_ctx) {
    all_ctx.template get<FirstMW>().v.push_back("3 after");
  }
};

TEST(Crow, middleware_context) {
  static char buf[2048];
  // SecondMW depends on FirstMW (it uses all_ctx.get<FirstMW>)
  // so it leads to compile error if we remove FirstMW from definition
  // App<IntSettingMiddleware, SecondMW> app;
  // or change the order of FirstMW and SecondMW
  // App<IntSettingMiddleware, SecondMW, FirstMW> app;

  App<IntSettingMiddleware, FirstMW, SecondMW, ThirdMW> app;

  int x{};
  CROW_ROUTE(app, "/")
  ([&](const request& req) {
    {
      auto& ctx = app.get_context<IntSettingMiddleware>(req);
      x = ctx.val;
    }
    {
      auto& ctx = app.get_context<FirstMW>(req);
      ctx.v.push_back("handle");
    }

    return "";
  });
  CROW_ROUTE(app, "/break")
  ([&](const request& req) {
    {
      auto& ctx = app.get_context<FirstMW>(req);
      ctx.v.push_back("handle");
    }

    return "";
  });

  decltype(app)::server_t server(&app, LOCALHOST_ADDRESS, 45451);
  auto _ = async(launch::async, [&] { server.run(); });
  std::string sendmsg = "GET /\r\n\r\n";
  asio::io_service is;
  {
    asio::ip::tcp::socket c(is);
    c.connect(asio::ip::tcp::endpoint(
        asio::ip::address::from_string(LOCALHOST_ADDRESS), 45451));

    c.send(asio::buffer(sendmsg));

    c.receive(asio::buffer(buf, 2048));
    c.close();
  }
  {
    auto& out = test_middleware_context_vector;
    ASSERT_EQUAL(1, x);
    ASSERT_EQUAL(7, out.size());
    ASSERT_EQUAL("1 before", out[0]);
    ASSERT_EQUAL("2 before", out[1]);
    ASSERT_EQUAL("3 before", out[2]);
    ASSERT_EQUAL("handle", out[3]);
    ASSERT_EQUAL("3 after", out[4]);
    ASSERT_EQUAL("2 after", out[5]);
    ASSERT_EQUAL("1 after", out[6]);
  }
  std::string sendmsg2 = "GET /break\r\n\r\n";
  {
    asio::ip::tcp::socket c(is);
    c.connect(asio::ip::tcp::endpoint(
        asio::ip::address::from_string(LOCALHOST_ADDRESS), 45451));

    c.send(asio::buffer(sendmsg2));

    c.receive(asio::buffer(buf, 2048));
    c.close();
  }
  {
    auto& out = test_middleware_context_vector;
    ASSERT_EQUAL(4, out.size());
    ASSERT_EQUAL("1 before", out[0]);
    ASSERT_EQUAL("2 before", out[1]);
    ASSERT_EQUAL("2 after", out[2]);
    ASSERT_EQUAL("1 after", out[3]);
  }
  server.stop();
}

TEST(Crow, bug_quick_repeated_request) {
  static char buf[2048];

  SimpleApp app;

  CROW_ROUTE(app, "/")([&] { return "hello"; });

  decltype(app)::server_t server(&app, LOCALHOST_ADDRESS, 45451);
  auto _ = async(launch::async, [&] { server.run(); });
  std::string sendmsg = "GET / HTTP/1.1\r\nHost: localhost\r\n\r\n";
  asio::io_service is;
  {
    std::vector<std::future<void>> v;
    for (int i = 0; i < 5; i++) {
      v.push_back(async(launch::async, [&] {
        asio::ip::tcp::socket c(is);
        c.connect(asio::ip::tcp::endpoint(
            asio::ip::address::from_string(LOCALHOST_ADDRESS), 45451));

        for (int j = 0; j < 5; j++) {
          c.send(asio::buffer(sendmsg));

          size_t received = c.receive(asio::buffer(buf, 2048));
          ASSERT_EQUAL("hello",
                       std::string(buf + received - 5, buf + received));
        }
        c.close();
      }));
    }
  }
  server.stop();
}

TEST(Crow, simple_url_params) {
  static char buf[2048];

  SimpleApp app;

  query_string last_url_params;

  CROW_ROUTE(app, "/params")
  ([&last_url_params](const crow::request& req) {
    last_url_params = std::move(req.url_params);
    return "OK";
  });

  /// params?h=1&foo=bar&lol&count[]=1&count[]=4&pew=5.2

  decltype(app)::server_t server(&app, LOCALHOST_ADDRESS, 45451);
  auto _ = async(launch::async, [&] { server.run(); });
  asio::io_service is;
  std::string sendmsg;

  // check empty params
  sendmsg = "GET /params\r\n\r\n";
  {
    asio::ip::tcp::socket c(is);
    c.connect(asio::ip::tcp::endpoint(
        asio::ip::address::from_string(LOCALHOST_ADDRESS), 45451));
    c.send(asio::buffer(sendmsg));
    c.receive(asio::buffer(buf, 2048));
    c.close();

    stringstream ss;
    ss << last_url_params;

    ASSERT_EQUAL("[  ]", ss.str());
  }
  // check single presence
  sendmsg = "GET /params?foobar\r\n\r\n";
  {
    asio::ip::tcp::socket c(is);
    c.connect(asio::ip::tcp::endpoint(
        asio::ip::address::from_string(LOCALHOST_ADDRESS), 45451));
    c.send(asio::buffer(sendmsg));
    c.receive(asio::buffer(buf, 2048));
    c.close();

    ASSERT_TRUE(last_url_params.get("missing") == nullptr);
    ASSERT_TRUE(last_url_params.get("foobar") != nullptr);
    ASSERT_TRUE(last_url_params.get_list("missing").empty());
  }
  // check multiple presence
  sendmsg = "GET /params?foo&bar&baz\r\n\r\n";
  {
    asio::ip::tcp::socket c(is);
    c.connect(asio::ip::tcp::endpoint(
        asio::ip::address::from_string(LOCALHOST_ADDRESS), 45451));
    c.send(asio::buffer(sendmsg));
    c.receive(asio::buffer(buf, 2048));
    c.close();

    ASSERT_TRUE(last_url_params.get("missing") == nullptr);
    ASSERT_TRUE(last_url_params.get("foo") != nullptr);
    ASSERT_TRUE(last_url_params.get("bar") != nullptr);
    ASSERT_TRUE(last_url_params.get("baz") != nullptr);
  }
  // check single value
  sendmsg = "GET /params?hello=world\r\n\r\n";
  {
    asio::ip::tcp::socket c(is);
    c.connect(asio::ip::tcp::endpoint(
        asio::ip::address::from_string(LOCALHOST_ADDRESS), 45451));
    c.send(asio::buffer(sendmsg));
    c.receive(asio::buffer(buf, 2048));
    c.close();

    ASSERT_EQUAL(string(last_url_params.get("hello")), "world");
  }
  // check multiple value
  sendmsg = "GET /params?hello=world&left=right&up=down\r\n\r\n";
  {
    asio::ip::tcp::socket c(is);
    c.connect(asio::ip::tcp::endpoint(
        asio::ip::address::from_string(LOCALHOST_ADDRESS), 45451));
    c.send(asio::buffer(sendmsg));
    c.receive(asio::buffer(buf, 2048));
    c.close();

    ASSERT_EQUAL(string(last_url_params.get("hello")), "world");
    ASSERT_EQUAL(string(last_url_params.get("left")), "right");
    ASSERT_EQUAL(string(last_url_params.get("up")), "down");
  }
  // check multiple value, multiple types
  sendmsg = "GET /params?int=100&double=123.45&boolean=1\r\n\r\n";
  {
    asio::ip::tcp::socket c(is);
    c.connect(asio::ip::tcp::endpoint(
        asio::ip::address::from_string(LOCALHOST_ADDRESS), 45451));
    c.send(asio::buffer(sendmsg));
    c.receive(asio::buffer(buf, 2048));
    c.close();

    ASSERT_EQUAL(boost::lexical_cast<int>(last_url_params.get("int")), 100);
    ASSERT_EQUAL(boost::lexical_cast<double>(last_url_params.get("double")),
                 123.45);
    ASSERT_EQUAL(boost::lexical_cast<bool>(last_url_params.get("boolean")),
                 true);
  }
  // check single array value
  sendmsg = "GET /params?tmnt[]=leonardo\r\n\r\n";
  {
    asio::ip::tcp::socket c(is);

    c.connect(asio::ip::tcp::endpoint(
        asio::ip::address::from_string(LOCALHOST_ADDRESS), 45451));
    c.send(asio::buffer(sendmsg));
    c.receive(asio::buffer(buf, 2048));
    c.close();

    ASSERT_TRUE(last_url_params.get("tmnt") == nullptr);
    ASSERT_EQUAL(last_url_params.get_list("tmnt").size(), 1);
    ASSERT_EQUAL(string(last_url_params.get_list("tmnt")[0]), "leonardo");
  }
  // check multiple array value
  sendmsg =
      "GET /params?tmnt[]=leonardo&tmnt[]=donatello&tmnt[]=raphael\r\n\r\n";
  {
    asio::ip::tcp::socket c(is);

    c.connect(asio::ip::tcp::endpoint(
        asio::ip::address::from_string(LOCALHOST_ADDRESS), 45451));
    c.send(asio::buffer(sendmsg));
    c.receive(asio::buffer(buf, 2048));
    c.close();

    ASSERT_EQUAL(last_url_params.get_list("tmnt").size(), 3);
    ASSERT_EQUAL(string(last_url_params.get_list("tmnt")[0]), "leonardo");
    ASSERT_EQUAL(string(last_url_params.get_list("tmnt")[1]), "donatello");
    ASSERT_EQUAL(string(last_url_params.get_list("tmnt")[2]), "raphael");
  }
  server.stop();
}

TEST(Crow, route_dynamic) {
  SimpleApp app;
  int x = 1;
  app.route_dynamic("/")([&] {
    x = 2;
    return "";
  });

  app.route_dynamic("/set4")([&](const request&) {
    x = 4;
    return "";
  });
  app.route_dynamic("/set5")([&](const request&, response& res) {
    x = 5;
    res.end();
  });

  app.route_dynamic("/set_int/<int>")([&](int y) {
    x = y;
    return "";
  });

  try {
    app.route_dynamic("/invalid_test/<double>/<path>")([]() { return ""; });
    fail();
  } catch (std::exception&) {
  }

  // app is in an invalid state when route_dynamic throws an exception.
  try {
    app.validate();
    fail();
  } catch (std::exception&) {
  }

  {
    boost::beast::http::request<boost::beast::http::string_body> r{};
    request req{r};
    response res;
    req.url = "/";
    app.handle(req, res);
    ASSERT_EQUAL(x, 2);
  }
  {
    boost::beast::http::request<boost::beast::http::string_body> r{};
    request req{r};
    response res;
    req.url = "/set_int/42";
    app.handle(req, res);
    ASSERT_EQUAL(x, 42);
  }
  {
    boost::beast::http::request<boost::beast::http::string_body> r{};
    request req{r};
    response res;
    req.url = "/set5";
    app.handle(req, res);
    ASSERT_EQUAL(x, 5);
  }
  {
    boost::beast::http::request<boost::beast::http::string_body> r{};
    request req{r};
    response res;
    req.url = "/set4";
    app.handle(req, res);
    ASSERT_EQUAL(x, 4);
  }
}