diff --git a/tests/daemon/limited-io.cpp b/tests/daemon/limited-io.cpp
new file mode 100644
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+++ b/tests/daemon/limited-io.cpp
@@ -0,0 +1,116 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/*
+ * Copyright (c) 2014-2019,  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/>.
+ */
+
+#include "limited-io.hpp"
+#include "core/logger.hpp"
+#include "daemon/global.hpp"
+
+#include <boost/exception/diagnostic_information.hpp>
+
+namespace nfd {
+namespace tests {
+
+NFD_LOG_INIT(tests.LimitedIo);
+
+const int LimitedIo::UNLIMITED_OPS = std::numeric_limits<int>::max();
+const time::nanoseconds LimitedIo::UNLIMITED_TIME = time::nanoseconds::min();
+
+LimitedIo::LimitedIo(UnitTestTimeFixture* uttf)
+  : m_uttf(uttf)
+{
+}
+
+LimitedIo::StopReason
+LimitedIo::run(int nOpsLimit, const time::nanoseconds& timeLimit, const time::nanoseconds& tick)
+{
+  BOOST_ASSERT(!m_isRunning);
+
+  if (nOpsLimit <= 0) {
+    return EXCEED_OPS;
+  }
+
+  m_isRunning = true;
+
+  m_reason = NO_WORK;
+  m_nOpsRemaining = nOpsLimit;
+  if (timeLimit >= 0_ns) {
+    m_timeout = getScheduler().schedule(timeLimit, [this] { afterTimeout(); });
+  }
+
+  try {
+    if (m_uttf == nullptr) {
+      getGlobalIoService().run();
+    }
+    else {
+      // timeLimit is enforced by afterTimeout
+      m_uttf->advanceClocks(tick, time::nanoseconds::max());
+    }
+  }
+  catch (const StopException&) {
+  }
+  catch (const std::exception& ex) {
+    NFD_LOG_ERROR("LimitedIo::run: " << boost::diagnostic_information(ex));
+    m_reason = EXCEPTION;
+    m_lastException = std::current_exception();
+  }
+
+  getGlobalIoService().reset();
+  m_timeout.cancel();
+  m_isRunning = false;
+
+  return m_reason;
+}
+
+void
+LimitedIo::afterOp()
+{
+  if (!m_isRunning) {
+    // Do not proceed further if .afterOp() is invoked out of .run(),
+    return;
+  }
+
+  --m_nOpsRemaining;
+
+  if (m_nOpsRemaining <= 0) {
+    m_reason = EXCEED_OPS;
+    getGlobalIoService().stop();
+    if (m_uttf != nullptr) {
+      NDN_THROW(StopException());
+    }
+  }
+}
+
+void
+LimitedIo::afterTimeout()
+{
+  m_reason = EXCEED_TIME;
+  getGlobalIoService().stop();
+  if (m_uttf != nullptr) {
+    NDN_THROW(StopException());
+  }
+}
+
+} // namespace tests
+} // namespace nfd