libzmq/tests/test_inproc_connect.cpp

/* SPDX-License-Identifier: MPL-2.0 */

#include "testutil.hpp"
#include "testutil_unity.hpp"

SETUP_TEARDOWN_TESTCONTEXT

static void pusher (void * /*unused*/)
{
    // Connect first
    // do not use test_context_socket here, as it is not thread-safe
    void *connect_socket = zmq_socket (get_test_context (), ZMQ_PAIR);

    TEST_ASSERT_SUCCESS_ERRNO (zmq_connect (connect_socket, "inproc://sink"));

    // Queue up some data
    send_string_expect_success (connect_socket, "foobar", 0);

    // Cleanup
    TEST_ASSERT_SUCCESS_ERRNO (zmq_close (connect_socket));
}

static void simult_conn (void *endpt_)
{
    // Pull out arguments - endpoint string
    const char *endpt = static_cast<const char *> (endpt_);

    // Connect
    // do not use test_context_socket here, as it is not thread-safe
    void *connect_socket = zmq_socket (get_test_context (), ZMQ_PAIR);
    TEST_ASSERT_SUCCESS_ERRNO (zmq_connect (connect_socket, endpt));
    recv_string_expect_success (connect_socket, "foobar", 0);

    // Cleanup
    TEST_ASSERT_SUCCESS_ERRNO (zmq_close (connect_socket));
}

static void simult_bind (void *endpt_)
{
    // Pull out arguments - context followed by endpoint string
    const char *endpt = static_cast<const char *> (endpt_);

    // Bind
    // do not use test_context_socket here, as it is not thread-safe
    void *bind_socket = zmq_socket (get_test_context (), ZMQ_PAIR);
    TEST_ASSERT_SUCCESS_ERRNO (zmq_bind (bind_socket, endpt));
    send_string_expect_success (bind_socket, "foobar", 0);

    // Cleanup
    TEST_ASSERT_SUCCESS_ERRNO (zmq_close (bind_socket));
}

void test_bind_before_connect ()
{
    // Bind first
    void *bind_socket = test_context_socket (ZMQ_PAIR);
    TEST_ASSERT_SUCCESS_ERRNO (zmq_bind (bind_socket, "inproc://bbc"));

    // Now connect
    void *connect_socket = test_context_socket (ZMQ_PAIR);
    TEST_ASSERT_SUCCESS_ERRNO (zmq_connect (connect_socket, "inproc://bbc"));

    // Queue up some data
    send_string_expect_success (connect_socket, "foobar", 0);

    // Read pending message
    recv_string_expect_success (bind_socket, "foobar", 0);

    // Cleanup
    test_context_socket_close (connect_socket);
    test_context_socket_close (bind_socket);
}

void test_connect_before_bind ()
{
    // Connect first
    void *connect_socket = test_context_socket (ZMQ_PAIR);
    TEST_ASSERT_SUCCESS_ERRNO (zmq_connect (connect_socket, "inproc://cbb"));

    // Queue up some data
    send_string_expect_success (connect_socket, "foobar", 0);

    // Now bind
    void *bind_socket = test_context_socket (ZMQ_PAIR);
    TEST_ASSERT_SUCCESS_ERRNO (zmq_bind (bind_socket, "inproc://cbb"));

    // Read pending message
    recv_string_expect_success (bind_socket, "foobar", 0);

    // Cleanup
    test_context_socket_close (connect_socket);
    test_context_socket_close (bind_socket);
}

void test_connect_before_bind_pub_sub ()
{
    // Connect first
    void *connect_socket = test_context_socket (ZMQ_PUB);
    TEST_ASSERT_SUCCESS_ERRNO (zmq_connect (connect_socket, "inproc://cbbps"));

    // Queue up some data, this will be dropped
    send_string_expect_success (connect_socket, "before", 0);

    // Now bind
    void *bind_socket = test_context_socket (ZMQ_SUB);
    TEST_ASSERT_SUCCESS_ERRNO (
      zmq_setsockopt (bind_socket, ZMQ_SUBSCRIBE, "", 0));
    TEST_ASSERT_SUCCESS_ERRNO (zmq_bind (bind_socket, "inproc://cbbps"));

    // Wait for pub-sub connection to happen
    msleep (SETTLE_TIME);

    // Queue up some data, this not will be dropped
    send_string_expect_success (connect_socket, "after", 0);

    // Read pending message
    recv_string_expect_success (bind_socket, "after", 0);

    // Cleanup
    test_context_socket_close (connect_socket);
    test_context_socket_close (bind_socket);
}

void test_connect_before_bind_ctx_term ()
{
    for (int i = 0; i < 20; ++i) {
        // Connect first
        void *connect_socket = test_context_socket (ZMQ_ROUTER);

        char ep[32];
        snprintf (ep, 32 * sizeof (char), "inproc://cbbrr%d", i);
        TEST_ASSERT_SUCCESS_ERRNO (zmq_connect (connect_socket, ep));

        // Cleanup
        test_context_socket_close (connect_socket);
    }
}

void test_multiple_connects ()
{
    const unsigned int no_of_connects = 10;

    void *connect_socket[no_of_connects];

    // Connect first
    for (unsigned int i = 0; i < no_of_connects; ++i) {
        connect_socket[i] = test_context_socket (ZMQ_PUSH);
        TEST_ASSERT_SUCCESS_ERRNO (
          zmq_connect (connect_socket[i], "inproc://multiple"));

        // Queue up some data
        send_string_expect_success (connect_socket[i], "foobar", 0);
    }

    // Now bind
    void *bind_socket = test_context_socket (ZMQ_PULL);
    TEST_ASSERT_SUCCESS_ERRNO (zmq_bind (bind_socket, "inproc://multiple"));

    for (unsigned int i = 0; i < no_of_connects; ++i) {
        recv_string_expect_success (bind_socket, "foobar", 0);
    }

    // Cleanup
    for (unsigned int i = 0; i < no_of_connects; ++i) {
        test_context_socket_close (connect_socket[i]);
    }

    test_context_socket_close (bind_socket);
}

void test_multiple_threads ()
{
    const unsigned int no_of_threads = 30;

    void *threads[no_of_threads];

    // Connect first
    for (unsigned int i = 0; i < no_of_threads; ++i) {
        threads[i] = zmq_threadstart (&pusher, NULL);
    }

    // Now bind
    void *bind_socket = test_context_socket (ZMQ_PULL);
    TEST_ASSERT_SUCCESS_ERRNO (zmq_bind (bind_socket, "inproc://sink"));

    for (unsigned int i = 0; i < no_of_threads; ++i) {
        // Read pending message
        recv_string_expect_success (bind_socket, "foobar", 0);
    }

    // Cleanup
    for (unsigned int i = 0; i < no_of_threads; ++i) {
        zmq_threadclose (threads[i]);
    }

    test_context_socket_close (bind_socket);
}

void test_simultaneous_connect_bind_threads ()
{
    const unsigned int no_of_times = 50;
    void *threads[no_of_times * 2];
    void *thr_args[no_of_times];
    char endpts[no_of_times][20];

    // Set up thread arguments: context followed by endpoint string
    for (unsigned int i = 0; i < no_of_times; ++i) {
        thr_args[i] = (void *) endpts[i];
        snprintf (endpts[i], 20 * sizeof (char), "inproc://foo_%d", i);
    }

    // Spawn all threads as simultaneously as possible
    for (unsigned int i = 0; i < no_of_times; ++i) {
        threads[i * 2 + 0] = zmq_threadstart (&simult_conn, thr_args[i]);
        threads[i * 2 + 1] = zmq_threadstart (&simult_bind, thr_args[i]);
    }

    // Close all threads
    for (unsigned int i = 0; i < no_of_times; ++i) {
        zmq_threadclose (threads[i * 2 + 0]);
        zmq_threadclose (threads[i * 2 + 1]);
    }
}

void test_routing_id ()
{
    //  Create the infrastructure
    void *sc = test_context_socket (ZMQ_DEALER);

    TEST_ASSERT_SUCCESS_ERRNO (zmq_connect (sc, "inproc://routing_id"));

    void *sb = test_context_socket (ZMQ_ROUTER);

    TEST_ASSERT_SUCCESS_ERRNO (zmq_bind (sb, "inproc://routing_id"));

    //  Send 2-part message.
    TEST_ASSERT_EQUAL_INT (
      1, TEST_ASSERT_SUCCESS_ERRNO (zmq_send (sc, "A", 1, ZMQ_SNDMORE)));
    TEST_ASSERT_EQUAL_INT (
      1, TEST_ASSERT_SUCCESS_ERRNO (zmq_send (sc, "B", 1, 0)));

    //  Routing id comes first.
    zmq_msg_t msg;
    TEST_ASSERT_SUCCESS_ERRNO (zmq_msg_init (&msg));
    TEST_ASSERT_SUCCESS_ERRNO (zmq_msg_recv (&msg, sb, 0));
    TEST_ASSERT_EQUAL_INT (1, zmq_msg_more (&msg));

    //  Then the first part of the message body.
    TEST_ASSERT_EQUAL_INT (
      1, TEST_ASSERT_SUCCESS_ERRNO (zmq_msg_recv (&msg, sb, 0)));
    TEST_ASSERT_EQUAL_INT (1, zmq_msg_more (&msg));

    //  And finally, the second part of the message body.
    TEST_ASSERT_EQUAL_INT (
      1, TEST_ASSERT_SUCCESS_ERRNO (zmq_msg_recv (&msg, sb, 0)));
    TEST_ASSERT_EQUAL_INT (0, zmq_msg_more (&msg));

    //  Deallocate the infrastructure.
    test_context_socket_close (sc);
    test_context_socket_close (sb);
}

void test_connect_only ()
{
    void *connect_socket = test_context_socket (ZMQ_PUSH);
    TEST_ASSERT_SUCCESS_ERRNO (zmq_connect (connect_socket, "inproc://a"));

    test_context_socket_close (connect_socket);
}


void test_unbind ()
{
    // Bind and unbind socket 1
    void *bind_socket1 = test_context_socket (ZMQ_PAIR);
    TEST_ASSERT_SUCCESS_ERRNO (zmq_bind (bind_socket1, "inproc://unbind"));
    TEST_ASSERT_SUCCESS_ERRNO (zmq_unbind (bind_socket1, "inproc://unbind"));

    // Bind socket 2
    void *bind_socket2 = test_context_socket (ZMQ_PAIR);
    TEST_ASSERT_SUCCESS_ERRNO (zmq_bind (bind_socket2, "inproc://unbind"));

    // Now connect
    void *connect_socket = test_context_socket (ZMQ_PAIR);
    TEST_ASSERT_SUCCESS_ERRNO (zmq_connect (connect_socket, "inproc://unbind"));

    // Queue up some data
    send_string_expect_success (connect_socket, "foobar", 0);

    // Read pending message
    recv_string_expect_success (bind_socket2, "foobar", 0);

    // Cleanup
    test_context_socket_close (connect_socket);
    test_context_socket_close (bind_socket1);
    test_context_socket_close (bind_socket2);
}

void test_shutdown_during_pend ()
{
    // Connect first
    void *connect_socket = test_context_socket (ZMQ_PAIR);
    TEST_ASSERT_SUCCESS_ERRNO (zmq_connect (connect_socket, "inproc://cbb"));

    zmq_ctx_shutdown (get_test_context ());

    // Cleanup
    test_context_socket_close (connect_socket);
}

int main (void)
{
    setup_test_environment ();

    UNITY_BEGIN ();
    RUN_TEST (test_bind_before_connect);
    RUN_TEST (test_connect_before_bind);
    RUN_TEST (test_connect_before_bind_pub_sub);
    RUN_TEST (test_connect_before_bind_ctx_term);
    RUN_TEST (test_multiple_connects);
    RUN_TEST (test_multiple_threads);
    RUN_TEST (test_simultaneous_connect_bind_threads);
    RUN_TEST (test_routing_id);
    RUN_TEST (test_connect_only);
    RUN_TEST (test_unbind);
    RUN_TEST (test_shutdown_during_pend);
    return UNITY_END ();
}