added zmq_unbind() / zmq_disconnect() test script.

it works but rises very serious questions.

Please add license header by your choice.
This file for 99% resemble crossroads-io/tests/shutdown.cpp

tests/Makefile.am

@@ -13,7 +13,8 @@ noinst_PROGRAMS = test_pair_inproc \
                   test_invalid_rep \
                   test_msg_flags \
                   test_connect_resolve \
-                  test_last_endpoint
+                  test_last_endpoint \
+                  test_term_endpoint
 
 if !ON_MINGW
 noinst_PROGRAMS += test_shutdown_stress \
@@ -33,6 +34,7 @@ test_invalid_rep_SOURCES = test_invalid_rep.cpp
 test_msg_flags_SOURCES = test_msg_flags.cpp
 test_connect_resolve_SOURCES = test_connect_resolve.cpp
 test_last_endpoint_SOURCES = test_last_endpoint.cpp
+test_term_endpoint_SOURCES = test_term_endpoint.cpp
 
 if !ON_MINGW
 test_shutdown_stress_SOURCES = test_shutdown_stress.cpp

tests/test_term_endpoint.cpp

+#include <assert.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "../include/zmq.h"
+#include "../include/zmq_utils.h"
+
+
+int main (int argc, char *argv [])
+{
+    int rc;
+    char buf[32];
+    const char *ep = "tcp://127.0.0.1:5560";
+
+    fprintf (stderr, "unbind endpoint test running...\n");
+
+    //  Create infrastructure.
+    void *ctx = zmq_init (1);
+    assert (ctx);
+    void *push = zmq_socket (ctx, ZMQ_PUSH);
+    assert (push);
+    rc = zmq_bind (push, ep);
+    assert (rc == 0);
+    void *pull = zmq_socket (ctx, ZMQ_PULL);
+    assert (pull);
+    rc = zmq_connect (pull, ep);
+    assert (rc == 0);
+
+    //  Pass one message through to ensure the connection is established.
+    rc = zmq_send (push, "ABC", 3, 0);
+    assert (rc == 3);
+    rc = zmq_recv (pull, buf, sizeof (buf), 0);
+    assert (rc == 3);
+
+    // Unbind the lisnening endpoint
+    rc = zmq_unbind (push, ep);
+    assert (rc == 0);
+
+    // Let events some time
+    zmq_sleep (1);
+
+    //  Check that sending would block (there's no outbound connection).
+    rc = zmq_send (push, "ABC", 3, ZMQ_DONTWAIT);
+    assert (rc == -1 && zmq_errno () == EAGAIN);
+
+    //  Clean up.
+    rc = zmq_close (pull);
+    assert (rc == 0);
+    rc = zmq_close (push);
+    assert (rc == 0);
+    rc = zmq_term (ctx);
+    assert (rc == 0);
+
+
+    //  Now the other way round.
+    fprintf (stderr, "disconnect endpoint test running...\n");
+
+
+    //  Create infrastructure.
+    ctx = zmq_init (1);
+    assert (ctx);
+    push = zmq_socket (ctx, ZMQ_PUSH);
+    assert (push);
+    rc = zmq_connect (push, ep);
+    assert (rc == 0);
+    pull = zmq_socket (ctx, ZMQ_PULL);
+    assert (pull);
+    rc = zmq_bind (pull, ep);
+    assert (rc == 0);
+
+    //  Pass one message through to ensure the connection is established.
+    rc = zmq_send (push, "ABC", 3, 0);
+    assert (rc == 3);
+    rc = zmq_recv (pull, buf, sizeof (buf), 0);
+    assert (rc == 3);
+
+    // Disconnect the bound endpoint
+    rc = zmq_disconnect (push, ep);
+    assert (rc == 0);
+
+    // Let events some time
+    zmq_sleep (1);
+
+    //  Check that sending would block (there's no inbound connections).
+    rc = zmq_send (push, "ABC", 3, ZMQ_DONTWAIT);
+    assert (rc == -1 && zmq_errno () == EAGAIN);
+
+    //  Clean up.
+    rc = zmq_close (pull);
+    assert (rc == 0);
+    rc = zmq_close (push);
+    assert (rc == 0);
+    rc = zmq_term (ctx);
+    assert (rc == 0);
+
+    return 0;
+}