1 files changed, 83 insertions, 0 deletions
diff --git a/tests/test_hwm.cpp b/tests/test_hwm.cpp
new file mode 100644
index 0000000..a3cba64
--- /dev/null
+++ b/tests/test_hwm.cpp
@@ -0,0 +1,83 @@
+/*
+    Copyright (c) 2010-2011 250bpm s.r.o.
+    Copyright (c) 2010-2011 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 <stdio.h>
+#include "testutil.hpp"
+
+int main (void)
+{
+    fprintf (stderr, "test_hwm running...\n");
+
+    void *ctx = zmq_init (1);
+    assert (ctx);
+
+    //  Create pair of socket, each with high watermark of 2. Thus the total
+    //  buffer space should be 4 messages.
+    void *sb = zmq_socket (ctx, ZMQ_PULL);
+    assert (sb);
+    int hwm = 2;
+    int rc = zmq_setsockopt (sb, ZMQ_RCVHWM, &hwm, sizeof (hwm));
+    assert (rc == 0);
+    rc = zmq_bind (sb, "inproc://a");
+    assert (rc == 0);
+
+    void *sc = zmq_socket (ctx, ZMQ_PUSH);
+    assert (sc);
+    rc = zmq_setsockopt (sc, ZMQ_SNDHWM, &hwm, sizeof (hwm));
+    assert (rc == 0);
+    rc = zmq_connect (sc, "inproc://a");
+    assert (rc == 0);
+
+    //  Try to send 10 messages. Only 4 should succeed.
+    for (int i = 0; i < 10; i++)
+    {
+        int rc = zmq_send (sc, NULL, 0, ZMQ_DONTWAIT);
+        if (i < 4)
+            assert (rc == 0);
+        else
+            assert (rc < 0 && errno == EAGAIN);
+    }
+
+    // There should be now 4 messages pending, consume them.
+    for (int i = 0; i != 4; i++) {
+        rc = zmq_recv (sb, NULL, 0, 0);
+        assert (rc == 0);
+    }
+
+    // Now it should be possible to send one more.
+    rc = zmq_send (sc, NULL, 0, 0);
+    assert (rc == 0);
+
+    //  Consume the remaining message.
+    rc = zmq_recv (sb, NULL, 0, 0);
+    assert (rc == 0);
+
+    rc = zmq_close (sc);
+    assert (rc == 0);
+
+    rc = zmq_close (sb);
+    assert (rc == 0);
+
+    rc = zmq_term (ctx);
+    assert (rc == 0);
+
+	return 0;
+}