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libzmq/tests/test_immediate.cpp
Luca Boccassi da31917f4f Relicense from LGPL3 + exceptions to Mozilla Public License version 2.0
Relicense permission collected from all relevant authors as tallied at:
https://github.com/rlenferink/libzmq-relicense/blob/master/checklist.md
The relicense grants are collected under RELICENSE/ and will be moved
to the above repository in a later commit.

Fixes https://github.com/zeromq/libzmq/issues/2376
2023-06-05 20:31:47 +01:00

199 lines
6.3 KiB
C++

/* SPDX-License-Identifier: MPL-2.0 */
#include "testutil.hpp"
#include "testutil_unity.hpp"
SETUP_TEARDOWN_TESTCONTEXT
void test_immediate_1 ()
{
int val;
int rc;
char buffer[16];
size_t len = MAX_SOCKET_STRING;
char my_endpoint[MAX_SOCKET_STRING];
// TEST 1.
// First we're going to attempt to send messages to two
// pipes, one connected, the other not. We should see
// the PUSH load balancing to both pipes, and hence half
// of the messages getting queued, as connect() creates a
// pipe immediately.
void *to = test_context_socket (ZMQ_PULL);
// Bind the one valid receiver
val = 0;
TEST_ASSERT_SUCCESS_ERRNO (
zmq_setsockopt (to, ZMQ_LINGER, &val, sizeof (val)));
bind_loopback_ipv4 (to, my_endpoint, len);
// Create a socket pushing to two endpoints - only 1 message should arrive.
void *from = test_context_socket (ZMQ_PUSH);
val = 0;
TEST_ASSERT_SUCCESS_ERRNO (
zmq_setsockopt (from, ZMQ_LINGER, &val, sizeof (val)));
// This pipe will not connect (provided the ephemeral port is not 5556)
TEST_ASSERT_SUCCESS_ERRNO (zmq_connect (from, "tcp://localhost:5556"));
// This pipe will
TEST_ASSERT_SUCCESS_ERRNO (zmq_connect (from, my_endpoint));
msleep (SETTLE_TIME);
// We send 10 messages, 5 should just get stuck in the queue
// for the not-yet-connected pipe
for (int i = 0; i < 10; ++i) {
send_string_expect_success (from, "Hello", 0);
}
// We now consume from the connected pipe
// - we should see just 5
int timeout = 250;
TEST_ASSERT_SUCCESS_ERRNO (
zmq_setsockopt (to, ZMQ_RCVTIMEO, &timeout, sizeof (int)));
int seen = 0;
while (true) {
rc = zmq_recv (to, &buffer, sizeof (buffer), 0);
if (rc == -1)
break; // Break when we didn't get a message
seen++;
}
// TODO: this fails ~1% of the runs on OBS but it does not seem to be reproducible anywhere else
if (seen == 0)
TEST_IGNORE_MESSAGE (
"Unreliable test occasionally fails on slow CIs, ignoring");
TEST_ASSERT_EQUAL_INT (5, seen);
test_context_socket_close (from);
test_context_socket_close (to);
}
void test_immediate_2 ()
{
// This time we will do the same thing, connect two pipes,
// one of which will succeed in connecting to a bound
// receiver, the other of which will fail. However, we will
// also set the delay attach on connect flag, which should
// cause the pipe attachment to be delayed until the connection
// succeeds.
// Bind the valid socket
void *to = test_context_socket (ZMQ_PULL);
size_t len = MAX_SOCKET_STRING;
char my_endpoint[MAX_SOCKET_STRING];
bind_loopback_ipv4 (to, my_endpoint, len);
int val = 0;
TEST_ASSERT_SUCCESS_ERRNO (
zmq_setsockopt (to, ZMQ_LINGER, &val, sizeof (val)));
// Create a socket pushing to two endpoints - all messages should arrive.
void *from = test_context_socket (ZMQ_PUSH);
val = 0;
TEST_ASSERT_SUCCESS_ERRNO (
zmq_setsockopt (from, ZMQ_LINGER, &val, sizeof (val)));
// Set the key flag
val = 1;
TEST_ASSERT_SUCCESS_ERRNO (
zmq_setsockopt (from, ZMQ_IMMEDIATE, &val, sizeof (val)));
// Connect to the invalid socket
TEST_ASSERT_SUCCESS_ERRNO (zmq_connect (from, "tcp://localhost:5561"));
// Connect to the valid socket
TEST_ASSERT_SUCCESS_ERRNO (zmq_connect (from, my_endpoint));
// Send 10 messages, all should be routed to the connected pipe
for (int i = 0; i < 10; ++i) {
send_string_expect_success (from, "Hello", 0);
}
int timeout = 250;
TEST_ASSERT_SUCCESS_ERRNO (
zmq_setsockopt (to, ZMQ_RCVTIMEO, &timeout, sizeof (int)));
int seen = 0;
while (true) {
char buffer[16];
int rc = zmq_recv (to, &buffer, sizeof (buffer), 0);
if (rc == -1)
break; // Break when we didn't get a message
seen++;
}
TEST_ASSERT_EQUAL_INT (10, seen);
test_context_socket_close (from);
test_context_socket_close (to);
}
void test_immediate_3 ()
{
// This time we want to validate that the same blocking behaviour
// occurs with an existing connection that is broken. We will send
// messages to a connected pipe, disconnect and verify the messages
// block. Then we reconnect and verify messages flow again.
void *backend = test_context_socket (ZMQ_DEALER);
void *frontend = test_context_socket (ZMQ_DEALER);
int zero = 0;
TEST_ASSERT_SUCCESS_ERRNO (
zmq_setsockopt (backend, ZMQ_LINGER, &zero, sizeof (zero)));
TEST_ASSERT_SUCCESS_ERRNO (
zmq_setsockopt (frontend, ZMQ_LINGER, &zero, sizeof (zero)));
// Frontend connects to backend using IMMEDIATE
int on = 1;
TEST_ASSERT_SUCCESS_ERRNO (
zmq_setsockopt (frontend, ZMQ_IMMEDIATE, &on, sizeof (on)));
size_t len = MAX_SOCKET_STRING;
char my_endpoint[MAX_SOCKET_STRING];
bind_loopback_ipv4 (backend, my_endpoint, len);
TEST_ASSERT_SUCCESS_ERRNO (zmq_connect (frontend, my_endpoint));
// Ping backend to frontend so we know when the connection is up
send_string_expect_success (backend, "Hello", 0);
recv_string_expect_success (frontend, "Hello", 0);
// Send message from frontend to backend
send_string_expect_success (frontend, "Hello", ZMQ_DONTWAIT);
test_context_socket_close (backend);
// Give time to process disconnect
msleep (SETTLE_TIME * 10);
// Send a message, should fail
TEST_ASSERT_FAILURE_ERRNO (EAGAIN,
zmq_send (frontend, "Hello", 5, ZMQ_DONTWAIT));
// Recreate backend socket
backend = test_context_socket (ZMQ_DEALER);
TEST_ASSERT_SUCCESS_ERRNO (
zmq_setsockopt (backend, ZMQ_LINGER, &zero, sizeof (zero)));
TEST_ASSERT_SUCCESS_ERRNO (zmq_bind (backend, my_endpoint));
// Ping backend to frontend so we know when the connection is up
send_string_expect_success (backend, "Hello", 0);
recv_string_expect_success (frontend, "Hello", 0);
// After the reconnect, should succeed
send_string_expect_success (frontend, "Hello", ZMQ_DONTWAIT);
test_context_socket_close (backend);
test_context_socket_close (frontend);
}
int main (void)
{
setup_test_environment ();
UNITY_BEGIN ();
RUN_TEST (test_immediate_1);
RUN_TEST (test_immediate_2);
RUN_TEST (test_immediate_3);
return UNITY_END ();
}