Subscription forwarding test added

Signed-off-by: Martin Sustrik <sustrik@250bpm.com>

tests/test_sub_forward.cpp

@@ -0,0 +1,94 @@
+/*
+    Copyright (c) 2007-2011 iMatix Corporation
+    Copyright (c) 2007-2011 Other contributors as noted in the AUTHORS file
+
+    This file is part of 0MQ.
+
+    0MQ is free software; you can redistribute it and/or modify it under
+    the terms of the GNU Lesser General Public License as published by
+    the Free Software Foundation; either version 3 of the License, or
+    (at your option) any later version.
+
+    0MQ 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 <assert.h>
+
+#include "../include/zmq.h"
+#include "../include/zmq_utils.h"
+
+int main (int argc, char *argv [])
+{
+    void *ctx = zmq_init (1);
+    assert (ctx);
+
+    //  First, create an intermediate device.
+    void *xpub = zmq_socket (ctx, ZMQ_XPUB);
+    assert (xpub);
+    int rc = zmq_bind (xpub, "tcp://127.0.0.1:5560");
+    assert (rc == 0);
+    void *xsub = zmq_socket (ctx, ZMQ_XSUB);
+    assert (xsub);
+    rc = zmq_bind (xsub, "tcp://127.0.0.1:5561");
+    assert (rc == 0);
+
+    //  Create a publisher.
+    void *pub = zmq_socket (ctx, ZMQ_PUB);
+    assert (pub);
+    rc = zmq_connect (pub, "tcp://127.0.0.1:5561");
+    assert (rc == 0);
+
+    //  Create a subscriber.
+    void *sub = zmq_socket (ctx, ZMQ_SUB);
+    assert (sub);
+    rc = zmq_connect (sub, "tcp://127.0.0.1:5560");
+    assert (rc == 0);
+
+    //  Subscribe for all messages.
+    rc = zmq_setsockopt (sub, ZMQ_SUBSCRIBE, "", 0);
+    assert (rc == 0);
+
+    //  Pass the subscription upstream through the device.
+    char buff [32];
+    rc = zmq_recv (xpub, buff, sizeof (buff), 0);
+    assert (rc >= 0);
+    rc = zmq_send (xsub, buff, rc, 0);
+    assert (rc >= 0);
+
+    //  Wait a bit till the subscription gets to the publisher.
+    zmq_sleep (1);
+
+    //  Send an empty message.
+    rc = zmq_send (pub, NULL, 0, 0);
+    assert (rc == 0);
+
+    //  Pass the message downstream through the device.
+    rc = zmq_recv (xsub, buff, sizeof (buff), 0);
+    assert (rc >= 0);
+    rc = zmq_send (xpub, buff, rc, 0);
+    assert (rc >= 0);
+
+    //  Receive the message in the subscriber.
+    rc = zmq_recv (sub, buff, sizeof (buff), 0);
+    assert (rc == 0);
+
+    //  Clean up.
+    rc = zmq_close (xpub);
+    assert (rc == 0);
+    rc = zmq_close (xsub);
+    assert (rc == 0);
+    rc = zmq_close (pub);
+    assert (rc == 0);
+    rc = zmq_close (sub);
+    assert (rc == 0);
+    rc = zmq_term (ctx);
+    assert (rc == 0);
+
+    return 0 ;
+}