/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/**
 * Copyright (c) 2013-2015 Regents of the University of California.
 *
 * This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
 *
 * ndn-cxx library 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.
 *
 * ndn-cxx library 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 copies of the GNU General Public License and GNU Lesser
 * General Public License along with ndn-cxx, e.g., in COPYING.md file.  If not, see
 * <http://www.gnu.org/licenses/>.
 *
 * See AUTHORS.md for complete list of ndn-cxx authors and contributors.
 */

#include "face.hpp"
#include "util/scheduler.hpp"
#include "security/key-chain.hpp"
#include "util/dummy-client-face.hpp"

#include "boost-test.hpp"
#include "unit-test-time-fixture.hpp"
#include "make-interest-data.hpp"

namespace ndn {
namespace tests {

using ndn::util::DummyClientFace;
using ndn::util::makeDummyClientFace;

class FaceFixture : public UnitTestTimeFixture
{
public:
  explicit
  FaceFixture(bool enableRegistrationReply = true)
    : face(makeDummyClientFace(io, { true, enableRegistrationReply }))
  {
  }

public:
  shared_ptr<DummyClientFace> face;
};

class FacesNoRegistrationReplyFixture : public FaceFixture
{
public:
  FacesNoRegistrationReplyFixture()
    : FaceFixture(false)
  {
  }
};

BOOST_FIXTURE_TEST_SUITE(TestFace, FaceFixture)

BOOST_AUTO_TEST_CASE(ExpressInterestData)
{
  size_t nData = 0;
  face->expressInterest(Interest("/Hello/World", time::milliseconds(50)),
                        [&] (const Interest& i, const Data& d) {
                          BOOST_CHECK(i.getName().isPrefixOf(d.getName()));
                          BOOST_CHECK_EQUAL(i.getName(), "/Hello/World");
                          ++nData;
                        },
                        bind([] {
                          BOOST_FAIL("Unexpected Nack");
                        }),
                        bind([] {
                          BOOST_FAIL("Unexpected timeout");
                        }));

  advanceClocks(time::milliseconds(1), 40);

  face->receive(*util::makeData("/Bye/World/a"));
  face->receive(*util::makeData("/Hello/World/a"));

  advanceClocks(time::milliseconds(1), 100);

  BOOST_CHECK_EQUAL(nData, 1);
  BOOST_CHECK_EQUAL(face->sentInterests.size(), 1);
  BOOST_CHECK_EQUAL(face->sentDatas.size(), 0);

  size_t nTimeouts = 0;
  face->expressInterest(Interest("/Hello/World/a/2", time::milliseconds(50)),
                        bind([]{}),
                        bind([]{}),
                        bind([&nTimeouts] {
                            ++nTimeouts;
                        }));
  advanceClocks(time::milliseconds(10), 100);
  BOOST_CHECK_EQUAL(nTimeouts, 1);
}

// test case for deprecated expressInterest implementation
BOOST_AUTO_TEST_CASE(DeprecatedExpressInterestData)
{
  size_t nData = 0;
  face->expressInterest(Interest("/Hello/World", time::milliseconds(50)),
                        [&] (const Interest& i, const Data& d) {
                          BOOST_CHECK(i.getName().isPrefixOf(d.getName()));
                          ++nData;
                        },
                        bind([] {
                            BOOST_FAIL("Unexpected timeout");
                          }));

  advanceClocks(time::milliseconds(1), 40);

  face->receive(*util::makeData("/Bye/World/a"));
  face->receive(*util::makeData("/Hello/World/a"));

  advanceClocks(time::milliseconds(1), 100);

  BOOST_CHECK_EQUAL(nData, 1);
  BOOST_CHECK_EQUAL(face->sentInterests.size(), 1);
  BOOST_CHECK_EQUAL(face->sentDatas.size(), 0);

  face->expressInterest(Interest("/Hello/World/a", time::milliseconds(50)),
                        [&] (const Interest& i, const Data& d) {
                          BOOST_CHECK(i.getName().isPrefixOf(d.getName()));
                          ++nData;
                        },
                        bind([] {
                            BOOST_FAIL("Unexpected timeout");
                          }));
  advanceClocks(time::milliseconds(1), 40);
  face->receive(*util::makeData("/Hello/World/a/1/xxxxx"));

  advanceClocks(time::milliseconds(1), 100);

  BOOST_CHECK_EQUAL(nData, 2);
  BOOST_CHECK_EQUAL(face->sentInterests.size(), 2);
  BOOST_CHECK_EQUAL(face->sentDatas.size(), 0);

  size_t nTimeouts = 0;
  face->expressInterest(Interest("/Hello/World/a/2", time::milliseconds(50)),
                        bind([]{}),
                        bind([&nTimeouts] {
                            ++nTimeouts;
                          }));
  advanceClocks(time::milliseconds(10), 100);
  BOOST_CHECK_EQUAL(nTimeouts, 1);
}

BOOST_AUTO_TEST_CASE(ExpressInterestTimeout)
{
  size_t nTimeouts = 0;
  face->expressInterest(Interest("/Hello/World", time::milliseconds(50)),
                        bind([] {
                          BOOST_FAIL("Unexpected ata");
                        }),
                        bind([] {
                          BOOST_FAIL("Unexpected Nack");
                        }),
                        [&nTimeouts] (const Interest& i) {
                          BOOST_CHECK_EQUAL(i.getName(), "/Hello/World");
                          ++nTimeouts;
                        });

  advanceClocks(time::milliseconds(10), 100);

  BOOST_CHECK_EQUAL(nTimeouts, 1);
  BOOST_CHECK_EQUAL(face->sentInterests.size(), 1);
  BOOST_CHECK_EQUAL(face->sentDatas.size(), 0);
  BOOST_CHECK_EQUAL(face->sentNacks.size(), 0);
}

// test case for deprecated expressInterest implementation
BOOST_AUTO_TEST_CASE(DeprecatedExpressInterestTimeout)
{
  size_t nTimeouts = 0;
  face->expressInterest(Interest("/Hello/World", time::milliseconds(50)),
                        bind([] {
                            BOOST_FAIL("Unexpected data");
                          }),
                        bind([&nTimeouts] {
                            ++nTimeouts;
                          }));

  advanceClocks(time::milliseconds(10), 100);

  BOOST_CHECK_EQUAL(nTimeouts, 1);
  BOOST_CHECK_EQUAL(face->sentInterests.size(), 1);
  BOOST_CHECK_EQUAL(face->sentDatas.size(), 0);
}

BOOST_AUTO_TEST_CASE(ExpressInterestNack)
{
  size_t nNacks = 0;

  Interest interest("/Hello/World", time::milliseconds(50));

  face->expressInterest(interest,
                        bind([] {
                          BOOST_FAIL("Unexpected Data");
                        }),
                        [&] (const Interest& i, const lp::Nack& n) {
                          BOOST_CHECK(i.getName().isPrefixOf(n.getInterest().getName()));
                          BOOST_CHECK_EQUAL(i.getName(), "/Hello/World");
                          BOOST_CHECK_EQUAL(n.getReason(), lp::NackReason::DUPLICATE);
                          ++nNacks;
                        },
                        bind([] {
                          BOOST_FAIL("Unexpected timeout");
                        }));

  advanceClocks(time::milliseconds(1), 40);

  lp::Nack nack(face->sentInterests[0]);
  nack.setReason(lp::NackReason::DUPLICATE);

  BOOST_CHECK_EQUAL(face->sentNacks.size(), 0);

  face->receive(nack);

  advanceClocks(time::milliseconds(1), 100);

  BOOST_CHECK_EQUAL(nNacks, 1);
  BOOST_CHECK_EQUAL(face->sentInterests.size(), 1);
}

BOOST_AUTO_TEST_CASE(RemovePendingInterest)
{
  const PendingInterestId* interestId =
    face->expressInterest(Interest("/Hello/World", time::milliseconds(50)),
                          bind([] {
                              BOOST_FAIL("Unexpected data");
                            }),
                          bind([] {
                              BOOST_FAIL("Unexpected timeout");
                            }));
  advanceClocks(time::milliseconds(10));

  face->removePendingInterest(interestId);
  advanceClocks(time::milliseconds(10));

  face->receive(*util::makeData("/Hello/World/!"));
  advanceClocks(time::milliseconds(10), 100);
}

BOOST_AUTO_TEST_CASE(removeAllPendingInterests)
{
  face->expressInterest(Interest("/Hello/World/0", time::milliseconds(50)),
                        bind([] { BOOST_FAIL("Unexpected data"); }),
                        bind([] { BOOST_FAIL("Unexpected nack"); }),
                        bind([] { BOOST_FAIL("Unexpected timeout"); }));

  face->expressInterest(Interest("/Hello/World/1", time::milliseconds(50)),
                        bind([] { BOOST_FAIL("Unexpected data"); }),
                        bind([] { BOOST_FAIL("Unexpected nack"); }),
                        bind([] { BOOST_FAIL("Unexpected timeout"); }));

  advanceClocks(time::milliseconds(10));

  face->removeAllPendingInterests();
  advanceClocks(time::milliseconds(10));

  BOOST_CHECK_EQUAL(face->getNPendingInterests(), 0);

  face->receive(*util::makeData("/Hello/World/0"));
  face->receive(*util::makeData("/Hello/World/1"));
  advanceClocks(time::milliseconds(10), 100);
}


BOOST_AUTO_TEST_CASE(SetUnsetInterestFilter)
{
  size_t nInterests = 0;
  size_t nRegs = 0;
  const RegisteredPrefixId* regPrefixId =
    face->setInterestFilter("/Hello/World",
                            bind([&nInterests] { ++nInterests; }),
                            bind([&nRegs] { ++nRegs; }),
                            bind([] {
                                BOOST_FAIL("Unexpected setInterestFilter failure");
                              }));
  advanceClocks(time::milliseconds(10), 10);
  BOOST_CHECK_EQUAL(nRegs, 1);
  BOOST_CHECK_EQUAL(nInterests, 0);

  face->receive(Interest("/Hello/World/!"));
  advanceClocks(time::milliseconds(10), 10);

  BOOST_CHECK_EQUAL(nRegs, 1);
  BOOST_CHECK_EQUAL(nInterests, 1);

  face->receive(Interest("/Bye/World/!"));
  advanceClocks(time::milliseconds(10000), 10);
  BOOST_CHECK_EQUAL(nInterests, 1);

  face->receive(Interest("/Hello/World/!/2"));
  advanceClocks(time::milliseconds(10), 10);
  BOOST_CHECK_EQUAL(nInterests, 2);

  // removing filter
  face->unsetInterestFilter(regPrefixId);
  advanceClocks(time::milliseconds(10), 10);

  face->receive(Interest("/Hello/World/!/3"));
  BOOST_CHECK_EQUAL(nInterests, 2);

  face->unsetInterestFilter(static_cast<const RegisteredPrefixId*>(0));
  advanceClocks(time::milliseconds(10), 10);

  face->unsetInterestFilter(static_cast<const InterestFilterId*>(0));
  advanceClocks(time::milliseconds(10), 10);
}

BOOST_AUTO_TEST_CASE(SetUnsetInterestFilterWithoutSucessCallback)
{
  size_t nInterests = 0;
  const RegisteredPrefixId* regPrefixId =
    face->setInterestFilter("/Hello/World",
                            bind([&nInterests] { ++nInterests; }),
                            bind([] {
                                BOOST_FAIL("Unexpected setInterestFilter failure");
                              }));
  advanceClocks(time::milliseconds(10), 10);
  BOOST_CHECK_EQUAL(nInterests, 0);

  face->receive(Interest("/Hello/World/!"));
  advanceClocks(time::milliseconds(10), 10);

  BOOST_CHECK_EQUAL(nInterests, 1);

  face->receive(Interest("/Bye/World/!"));
  advanceClocks(time::milliseconds(10000), 10);
  BOOST_CHECK_EQUAL(nInterests, 1);

  face->receive(Interest("/Hello/World/!/2"));
  advanceClocks(time::milliseconds(10), 10);
  BOOST_CHECK_EQUAL(nInterests, 2);

  // removing filter
  face->unsetInterestFilter(regPrefixId);
  advanceClocks(time::milliseconds(10), 10);

  face->receive(Interest("/Hello/World/!/3"));
  BOOST_CHECK_EQUAL(nInterests, 2);

  face->unsetInterestFilter(static_cast<const RegisteredPrefixId*>(0));
  advanceClocks(time::milliseconds(10), 10);

  face->unsetInterestFilter(static_cast<const InterestFilterId*>(0));
  advanceClocks(time::milliseconds(10), 10);
}

BOOST_FIXTURE_TEST_CASE(SetInterestFilterFail, FacesNoRegistrationReplyFixture)
{
  // don't enable registration reply
  size_t nRegFailed = 0;
  face->setInterestFilter("/Hello/World",
                          bind([] {
                              BOOST_FAIL("Unexpected Interest");
                            }),
                          bind([] {
                              BOOST_FAIL("Unexpected success of setInterestFilter");
                            }),
                          bind([&nRegFailed] {
                              ++nRegFailed;
                            }));

  advanceClocks(time::milliseconds(10), 10);
  BOOST_CHECK_EQUAL(nRegFailed, 0);

  advanceClocks(time::milliseconds(1000), 10);
  BOOST_CHECK_EQUAL(nRegFailed, 1);
}

BOOST_FIXTURE_TEST_CASE(SetInterestFilterFailWithoutSuccessCallback, FacesNoRegistrationReplyFixture)
{
  // don't enable registration reply
  size_t nRegFailed = 0;
  face->setInterestFilter("/Hello/World",
                          bind([] {
                              BOOST_FAIL("Unexpected Interest");
                            }),
                          bind([&nRegFailed] {
                              ++nRegFailed;
                            }));

  advanceClocks(time::milliseconds(10), 10);
  BOOST_CHECK_EQUAL(nRegFailed, 0);

  advanceClocks(time::milliseconds(1000), 10);
  BOOST_CHECK_EQUAL(nRegFailed, 1);
}

BOOST_AUTO_TEST_CASE(RegisterUnregisterPrefix)
{
  size_t nRegSuccesses = 0;
  const RegisteredPrefixId* regPrefixId =
    face->registerPrefix("/Hello/World",
                         bind([&nRegSuccesses] { ++nRegSuccesses; }),
                         bind([] {
                             BOOST_FAIL("Unexpected registerPrefix failure");
                           }));

  advanceClocks(time::milliseconds(10), 10);
  BOOST_CHECK_EQUAL(nRegSuccesses, 1);

  size_t nUnregSuccesses = 0;
  face->unregisterPrefix(regPrefixId,
                         bind([&nUnregSuccesses] { ++nUnregSuccesses; }),
                         bind([] {
                             BOOST_FAIL("Unexpected unregisterPrefix failure");
                           }));

  advanceClocks(time::milliseconds(10), 10);
  BOOST_CHECK_EQUAL(nUnregSuccesses, 1);
}

BOOST_FIXTURE_TEST_CASE(RegisterUnregisterPrefixFail, FacesNoRegistrationReplyFixture)
{
  size_t nRegFailures = 0;
  face->registerPrefix("/Hello/World",
                       bind([] {
                           BOOST_FAIL("Unexpected registerPrefix success");
                         }),
                       bind([&nRegFailures] { ++nRegFailures; }));

  advanceClocks(time::milliseconds(1000), 100);
  BOOST_CHECK_EQUAL(nRegFailures, 1);
}

BOOST_AUTO_TEST_CASE(SimilarFilters)
{
  size_t nInInterests1 = 0;
  face->setInterestFilter("/Hello/World",
                          bind([&nInInterests1] { ++nInInterests1; }),
                          RegisterPrefixSuccessCallback(),
                          bind([] {
                              BOOST_FAIL("Unexpected setInterestFilter failure");
                            }));

  size_t nInInterests2 = 0;
  face->setInterestFilter("/Hello",
                          bind([&nInInterests2] { ++nInInterests2; }),
                          RegisterPrefixSuccessCallback(),
                          bind([] {
                              BOOST_FAIL("Unexpected setInterestFilter failure");
                            }));

  size_t nInInterests3 = 0;
  face->setInterestFilter("/Los/Angeles/Lakers",
                          bind([&nInInterests3] { ++nInInterests3; }),
                          RegisterPrefixSuccessCallback(),
                          bind([] {
                              BOOST_FAIL("Unexpected setInterestFilter failure");
                            }));

  advanceClocks(time::milliseconds(10), 10);

  face->receive(Interest("/Hello/World/!"));
  advanceClocks(time::milliseconds(10), 10);

  BOOST_CHECK_EQUAL(nInInterests1, 1);
  BOOST_CHECK_EQUAL(nInInterests2, 1);
  BOOST_CHECK_EQUAL(nInInterests3, 0);
}

BOOST_AUTO_TEST_CASE(SetRegexFilterError)
{
  face->setInterestFilter(InterestFilter("/Hello/World", "<><b><c>?"),
                          [] (const Name&, const Interest&) {
                            BOOST_FAIL("InterestFilter::Error should have been triggered");
                          },
                          RegisterPrefixSuccessCallback(),
                          bind([] {
                              BOOST_FAIL("Unexpected setInterestFilter failure");
                            }));

  advanceClocks(time::milliseconds(10), 10);

  BOOST_REQUIRE_THROW(face->receive(Interest("/Hello/World/XXX/b/c")), InterestFilter::Error);
}

BOOST_AUTO_TEST_CASE(SetRegexFilter)
{
  size_t nInInterests = 0;
  face->setInterestFilter(InterestFilter("/Hello/World", "<><b><c>?"),
                          bind([&nInInterests] { ++nInInterests; }),
                          RegisterPrefixSuccessCallback(),
                          bind([] {
                              BOOST_FAIL("Unexpected setInterestFilter failure");
                            }));

  advanceClocks(time::milliseconds(10), 10);

  face->receive(Interest("/Hello/World/a"));     // shouldn't match
  BOOST_CHECK_EQUAL(nInInterests, 0);

  face->receive(Interest("/Hello/World/a/b"));   // should match
  BOOST_CHECK_EQUAL(nInInterests, 1);

  face->receive(Interest("/Hello/World/a/b/c")); // should match
  BOOST_CHECK_EQUAL(nInInterests, 2);

  face->receive(Interest("/Hello/World/a/b/d")); // should not match
  BOOST_CHECK_EQUAL(nInInterests, 2);
}

BOOST_AUTO_TEST_CASE(SetRegexFilterAndRegister)
{
  size_t nInInterests = 0;
  face->setInterestFilter(InterestFilter("/Hello/World", "<><b><c>?"),
                          bind([&nInInterests] { ++nInInterests; }));

  size_t nRegSuccesses = 0;
  face->registerPrefix("/Hello/World",
                       bind([&nRegSuccesses] { ++nRegSuccesses; }),
                       bind([] {
                           BOOST_FAIL("Unexpected setInterestFilter failure");
                         }));

  advanceClocks(time::milliseconds(10), 10);
  BOOST_CHECK_EQUAL(nRegSuccesses, 1);

  face->receive(Interest("/Hello/World/a")); // shouldn't match
  BOOST_CHECK_EQUAL(nInInterests, 0);

  face->receive(Interest("/Hello/World/a/b")); // should match
  BOOST_CHECK_EQUAL(nInInterests, 1);

  face->receive(Interest("/Hello/World/a/b/c")); // should match
  BOOST_CHECK_EQUAL(nInInterests, 2);

  face->receive(Interest("/Hello/World/a/b/d")); // should not match
  BOOST_CHECK_EQUAL(nInInterests, 2);
}

BOOST_FIXTURE_TEST_CASE(SetInterestFilterNoReg, FacesNoRegistrationReplyFixture) // Bug 2318
{
  // This behavior is specific to DummyClientFace.
  // Regular Face won't accept incoming packets until something is sent.

  int hit = 0;
  face->setInterestFilter(Name("/"), bind([&hit] { ++hit; }));
  face->processEvents(time::milliseconds(-1));

  auto interest = make_shared<Interest>("/A");
  face->receive(*interest);
  face->processEvents(time::milliseconds(-1));

  BOOST_CHECK_EQUAL(hit, 1);
}

BOOST_AUTO_TEST_CASE(ProcessEvents)
{
  face->processEvents(time::milliseconds(-1)); // io_service::reset()/poll() inside

  size_t nRegSuccesses = 0;
  face->registerPrefix("/Hello/World",
                       bind([&nRegSuccesses] { ++nRegSuccesses; }),
                       bind([] {
                           BOOST_FAIL("Unexpected setInterestFilter failure");
                         }));

  // io_service::poll() without reset
  face->getIoService().poll();
  BOOST_CHECK_EQUAL(nRegSuccesses, 0);

  face->processEvents(time::milliseconds(-1)); // io_service::reset()/poll() inside
  BOOST_CHECK_EQUAL(nRegSuccesses, 1);
}

BOOST_AUTO_TEST_CASE(ExpressInterestWithLocalControlHeader)
{
  Interest i("/Hello/World");
  i.setNextHopFaceId(1000);
  i.setIncomingFaceId(2000);

  face->expressInterest(i, bind([]{}), bind([]{}));
  advanceClocks(time::milliseconds(10));

  BOOST_REQUIRE_EQUAL(face->sentInterests.size(), 1);
  // only NextHopFaceId is allowed to go out
  BOOST_CHECK(face->sentInterests[0].getLocalControlHeader().hasNextHopFaceId());
  BOOST_CHECK(!face->sentInterests[0].getLocalControlHeader().hasIncomingFaceId());
  BOOST_CHECK_EQUAL(face->sentInterests[0].getNextHopFaceId(), 1000);
}

BOOST_AUTO_TEST_CASE(ReceiveInterestWithLocalControlHeader)
{
  face->setInterestFilter("/Hello/World",
                          [] (const InterestFilter&, const Interest& i) {
                            BOOST_CHECK(i.getLocalControlHeader().hasIncomingFaceId());
                            BOOST_CHECK_EQUAL(i.getIncomingFaceId(), 2000);
                          },
                          bind([]{}),
                          bind([] {
                              BOOST_FAIL("Unexpected setInterestFilter failure");
                            }));
  advanceClocks(time::milliseconds(10));

  Interest i("/Hello/World/!");
  i.setNextHopFaceId(1000);
  i.setIncomingFaceId(2000);

  face->receive(i);
  advanceClocks(time::milliseconds(10));
}

BOOST_AUTO_TEST_CASE(PutDataWithLocalControlHeader)
{
  shared_ptr<Data> d = util::makeData("/Bye/World/!");
  d->setIncomingFaceId(2000);
  d->getLocalControlHeader().setNextHopFaceId(1000); // setNextHopFaceId is intentionally
                                                     // not exposed directly

  face->put(*d);
  advanceClocks(time::milliseconds(10));

  BOOST_REQUIRE_EQUAL(face->sentDatas.size(), 1);
  BOOST_CHECK(!face->sentDatas[0].getLocalControlHeader().hasNextHopFaceId());
  BOOST_CHECK(!face->sentDatas[0].getLocalControlHeader().hasIncomingFaceId());
}

BOOST_AUTO_TEST_CASE(ReceiveDataWithLocalControlHeader)
{
  face->expressInterest(Interest("/Hello/World", time::milliseconds(50)),
                        [&] (const Interest& i, const Data& d) {
                          BOOST_CHECK(d.getLocalControlHeader().hasIncomingFaceId());
                          BOOST_CHECK_EQUAL(d.getIncomingFaceId(), 2000);
                        },
                        bind([] {
                            BOOST_FAIL("Unexpected timeout");
                          }));

  advanceClocks(time::milliseconds(10));

  shared_ptr<Data> d = util::makeData("/Hello/World/!");
  d->setIncomingFaceId(2000);
  d->getLocalControlHeader().setNextHopFaceId(1000); // setNextHopFaceId is intentionally
                                                     // not exposed directly
  face->receive(*d);

  advanceClocks(time::milliseconds(10), 100);
}

BOOST_AUTO_TEST_CASE(PutNack)
{
  lp::Nack nack(Interest("/Hello/World", time::milliseconds(50)));
  nack.setReason(lp::NackReason::NO_ROUTE);

  BOOST_CHECK_EQUAL(face->sentNacks.size(), 0);

  face->put(nack);

  advanceClocks(time::milliseconds(10));

  BOOST_CHECK_EQUAL(face->sentNacks.size(), 1);
}

BOOST_AUTO_TEST_CASE(DestructionWithoutCancellingPendingInterests) // Bug #2518
{
  face->expressInterest(Interest("/Hello/World", time::milliseconds(50)),
                        bind([]{}), bind([]{}));
  advanceClocks(time::milliseconds(10), 10);

  face.reset();

  advanceClocks(time::milliseconds(10), 10);
  // should not segfault
}

BOOST_AUTO_TEST_SUITE_END()

} // tests
} // namespace ndn