sockpp/tests/unit/test_tcp_socket.cpp

// test_tcp_socket.cpp
//
// Unit tests for the `tcp_socket` class(es).
//

// --------------------------------------------------------------------------
// This file is part of the "sockpp" C++ socket library.
//
// Copyright (c) 2019-2023 Frank Pagliughi
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// 1. Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its
// contributors may be used to endorse or promote products derived from this
// software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
// IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
// THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// --------------------------------------------------------------------------
//

#include <string>

#include "catch2_version.h"
#include "sockpp/tcp_acceptor.h"
#include "sockpp/tcp_connector.h"
#include "sockpp/tcp_socket.h"

using namespace sockpp;

TEST_CASE("tcp_socket default constructor", "[tcp_socket]") {
    tcp_socket sock;
    REQUIRE(!sock);
    REQUIRE(!sock.is_open());

    // REQUIRE(sock.family() == AF_INET);
}

TEST_CASE("tcp_socket handle constructor", "[tcp_socket]") {
    constexpr auto HANDLE = socket_t{3};

    SECTION("valid handle") {
        tcp_socket sock{HANDLE};
        REQUIRE(sock);
        REQUIRE(sock.is_open());

        // REQUIRE(sock.family() == AF_INET);
    }

    SECTION("invalid handle") {
        tcp_socket sock{INVALID_SOCKET};
        REQUIRE(!sock);
        REQUIRE(!sock.is_open());
        // TODO: Should this set an error?

        // REQUIRE(sock.family() == AF_INET);
    }
}

// --------------------------------------------------------------------------
// Connected tests

TEST_CASE("tcp_socket read/write", "[stream_socket]") {
    const string STR{"This is a test. This is only a test."};
    const size_t N = STR.length();

    inet_address addr{"localhost", TEST_PORT};
    tcp_acceptor asock{addr, 4, acceptor::REUSE};

    tcp_connector csock;
    csock.set_non_blocking();

    REQUIRE(csock.connect(addr));

    auto ssock = asock.accept().release();
    REQUIRE(ssock);

    SECTION("read_n/write_n") {
        char buf[512];  // N

        REQUIRE(csock.write_n(STR.data(), N).value() == N);
        REQUIRE(ssock.read_n(buf, N).value() == N);

        string str{buf, buf + N};
        REQUIRE(str == STR);

        char buf2[512];  // N

        // string write is a write_n()
        REQUIRE(csock.write(STR).value() == N);
        REQUIRE(ssock.read_n(buf2, N).value() == N);

        string str2{buf2, buf2 + N};
        REQUIRE(str2 == STR);
    }

    SECTION("scatter/gather") {
        const string HEADER{"<start>"}, FOOTER{"<end>"};

        const size_t N_HEADER = HEADER.length(), N_FOOTER = FOOTER.length(),
                     N_TOT = N_HEADER + N + N_FOOTER;

        std::vector<iovec> outv{
            iovec{(void*)HEADER.data(), N_HEADER}, iovec{(void*)STR.data(), N},
            iovec{(void*)FOOTER.data(), N_FOOTER}
        };

        char hbuf[512],  // N_HEADER
            buf[512],    // N
            fbuf[512];   // N_FOOTER

        std::vector<iovec> inv{
            iovec{(void*)hbuf, N_HEADER}, iovec{(void*)buf, N}, iovec{(void*)fbuf, N_FOOTER}
        };

        REQUIRE(csock.write(outv).value() == N_TOT);
        REQUIRE(csock.write(outv).value() == N_TOT);
        REQUIRE(csock.write(outv).value() == N_TOT);

        REQUIRE(ssock.read(inv).value() == N_TOT);

        REQUIRE(string(hbuf, N_HEADER) == HEADER);
        REQUIRE(string(buf, N) == STR);
        REQUIRE(string(fbuf, N_FOOTER) == FOOTER);
    }
}