Update ZMQ to current git.

vendor/ZMQ/tests/test_hiccup_msg.cpp

@@ -0,0 +1,76 @@
+/*
+    Copyright (c) 2007-2021 Contributors as noted in the AUTHORS file
+
+    This file is part of libzmq, the ZeroMQ core engine in C++.
+
+    libzmq is free software; you can redistribute it and/or modify it under
+    the terms of the GNU Lesser General Public License (LGPL) as published
+    by the Free Software Foundation; either version 3 of the License, or
+    (at your option) any later version.
+
+    As a special exception, the Contributors give you permission to link
+    this library with independent modules to produce an executable,
+    regardless of the license terms of these independent modules, and to
+    copy and distribute the resulting executable under terms of your choice,
+    provided that you also meet, for each linked independent module, the
+    terms and conditions of the license of that module. An independent
+    module is a module which is not derived from or based on this library.
+    If you modify this library, you must extend this exception to your
+    version of the library.
+
+    libzmq is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+    FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
+    License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "testutil.hpp"
+#include "testutil_unity.hpp"
+
+SETUP_TEARDOWN_TESTCONTEXT
+
+void test ()
+{
+    char address[MAX_SOCKET_STRING];
+    size_t addr_length = sizeof (address);
+
+    //  Create a server
+    void *server = test_context_socket (ZMQ_SERVER);
+
+    //  bind server
+    TEST_ASSERT_SUCCESS_ERRNO (zmq_bind (server, "tcp://127.0.0.1:*"));
+    TEST_ASSERT_SUCCESS_ERRNO (
+      zmq_getsockopt (server, ZMQ_LAST_ENDPOINT, address, &addr_length));
+
+    //  Create a client
+    void *client = test_context_socket (ZMQ_CLIENT);
+    TEST_ASSERT_SUCCESS_ERRNO (
+      zmq_setsockopt (client, ZMQ_HELLO_MSG, "HELLO", 5));
+    TEST_ASSERT_SUCCESS_ERRNO (
+      zmq_setsockopt (client, ZMQ_HICCUP_MSG, "HICCUP", 6));
+    TEST_ASSERT_SUCCESS_ERRNO (zmq_connect (client, address));
+
+    // Receive the hello message from client
+    recv_string_expect_success (server, "HELLO", 0);
+
+    // Kill the server
+    test_context_socket_close (server);
+
+    // Receive the hiccup message
+    recv_string_expect_success (client, "HICCUP", 0);
+
+    //  Clean up.
+    test_context_socket_close (client);
+}
+
+int main ()
+{
+    setup_test_environment ();
+
+    UNITY_BEGIN ();
+    RUN_TEST (test);
+    return UNITY_END ();
+}