tests: MulticastUdpTransport test suite improvements

refs #3346

Change-Id: I31b272b9b99d97ed317cf534d9e1bc4592bde77d
diff --git a/tests/daemon/face/multicast-udp-transport-fixture.hpp b/tests/daemon/face/multicast-udp-transport-fixture.hpp
new file mode 100644
index 0000000..639c828
--- /dev/null
+++ b/tests/daemon/face/multicast-udp-transport-fixture.hpp
@@ -0,0 +1,133 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/**
+ * Copyright (c) 2014-2015,  Regents of the University of California,
+ *                           Arizona Board of Regents,
+ *                           Colorado State University,
+ *                           University Pierre & Marie Curie, Sorbonne University,
+ *                           Washington University in St. Louis,
+ *                           Beijing Institute of Technology,
+ *                           The University of Memphis.
+ *
+ * This file is part of NFD (Named Data Networking Forwarding Daemon).
+ * See AUTHORS.md for complete list of NFD authors and contributors.
+ *
+ * NFD is free software: you can redistribute it and/or modify it under the terms
+ * of the GNU General Public License as published by the Free Software Foundation,
+ * either version 3 of the License, or (at your option) any later version.
+ *
+ * NFD 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * NFD, e.g., in COPYING.md file.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef NFD_TESTS_DAEMON_FACE_MULTICAST_UDP_TRANSPORT_FIXTURE_HPP
+#define NFD_TESTS_DAEMON_FACE_MULTICAST_UDP_TRANSPORT_FIXTURE_HPP
+
+#include "face/multicast-udp-transport.hpp"
+#include "face/face.hpp"
+
+#include "dummy-receive-link-service.hpp"
+#include "get-available-interface-ip.hpp"
+#include "tests/limited-io.hpp"
+
+namespace nfd {
+namespace face {
+namespace tests {
+
+using namespace nfd::tests;
+namespace ip = boost::asio::ip;
+using ip::udp;
+
+class MulticastUdpTransportFixture : public BaseFixture
+{
+protected:
+  MulticastUdpTransportFixture()
+    : transport(nullptr)
+    , multicastEp(ip::address::from_string("230.15.19.47"), 7070)
+    , defaultAddr(getAvailableInterfaceIp<ip::address_v4>(true))
+    , receivedPackets(nullptr)
+    , remoteSockRx(g_io)
+    , remoteSockTx(g_io)
+  {
+  }
+
+  void
+  initialize(ip::address_v4 address)
+  {
+    openMulticastSockets(remoteSockRx, remoteSockTx, multicastEp.port());
+
+    udp::socket sockRx(g_io);
+    udp::socket sockTx(g_io);
+    localEp = udp::endpoint(address, 7001);
+    openMulticastSockets(sockRx, sockTx, localEp.port());
+
+    face = make_unique<Face>(
+             make_unique<DummyReceiveLinkService>(),
+             make_unique<MulticastUdpTransport>(localEp, multicastEp, std::move(sockRx), std::move(sockTx)));
+    transport = static_cast<MulticastUdpTransport*>(face->getTransport());
+    receivedPackets = &static_cast<DummyReceiveLinkService*>(face->getLinkService())->receivedPackets;
+
+    BOOST_REQUIRE_EQUAL(transport->getState(), TransportState::UP);
+  }
+
+  void
+  openMulticastSockets(udp::socket& rx, udp::socket& tx, uint16_t port)
+  {
+    rx.open(udp::v4());
+    rx.set_option(udp::socket::reuse_address(true));
+    rx.bind(udp::endpoint(multicastEp.address(), port));
+    rx.set_option(ip::multicast::join_group(multicastEp.address()));
+
+    tx.open(udp::v4());
+    tx.set_option(udp::socket::reuse_address(true));
+    tx.set_option(ip::multicast::enable_loopback(true));
+    tx.bind(udp::endpoint(ip::address_v4::any(), port));
+  }
+
+  void
+  remoteRead(std::vector<uint8_t>& buf, bool needToCheck = true)
+  {
+    remoteSockRx.async_receive(boost::asio::buffer(buf),
+      [this, needToCheck] (const boost::system::error_code& error, size_t) {
+        if (needToCheck) {
+          BOOST_REQUIRE_EQUAL(error, boost::system::errc::success);
+        }
+        limitedIo.afterOp();
+      });
+    BOOST_REQUIRE_EQUAL(limitedIo.run(1, time::seconds(1)), LimitedIo::EXCEED_OPS);
+  }
+
+  void
+  remoteWrite(const std::vector<uint8_t>& buf, bool needToCheck = true)
+  {
+    remoteSockTx.async_send_to(boost::asio::buffer(buf), udp::endpoint(multicastEp.address(), 7001),
+      [needToCheck] (const boost::system::error_code& error, size_t) {
+        if (needToCheck) {
+          BOOST_REQUIRE_EQUAL(error, boost::system::errc::success);
+        }
+      });
+    limitedIo.defer(time::seconds(1));
+  }
+
+protected:
+  LimitedIo limitedIo;
+  MulticastUdpTransport* transport;
+  udp::endpoint localEp;
+  udp::endpoint multicastEp;
+  const ip::address_v4 defaultAddr;
+  std::vector<Transport::Packet>* receivedPackets;
+
+private:
+  unique_ptr<Face> face;
+  udp::socket remoteSockRx;
+  udp::socket remoteSockTx;
+};
+
+} // namespace tests
+} // namespace face
+} // namespace nfd
+
+#endif // NFD_TESTS_DAEMON_FACE_MULTICAST_UDP_TRANSPORT_FIXTURE_HPP