face: scoped prefix registration

refs #3919

Change-Id: I858bf38000014a295cf853635b9c2a4275267d32
diff --git a/tests/unit/detail/cancel-handle.t.cpp b/tests/unit/detail/cancel-handle.t.cpp
new file mode 100644
index 0000000..b87f9cd
--- /dev/null
+++ b/tests/unit/detail/cancel-handle.t.cpp
@@ -0,0 +1,137 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/*
+ * Copyright (c) 2013-2019 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 "ndn-cxx/detail/cancel-handle.hpp"
+
+#include "tests/boost-test.hpp"
+
+namespace ndn {
+namespace detail {
+namespace tests {
+
+BOOST_AUTO_TEST_SUITE(Detail)
+BOOST_AUTO_TEST_SUITE(TestCancelHandle)
+
+static CancelHandle
+makeDummyCancelHandle(int& nCancels)
+{
+  return CancelHandle([&] { ++nCancels; });
+}
+
+BOOST_AUTO_TEST_SUITE(PlainHandle)
+
+BOOST_AUTO_TEST_CASE(ManualCancel)
+{
+  int nCancels = 0;
+  auto hdl = makeDummyCancelHandle(nCancels);
+  BOOST_CHECK_EQUAL(nCancels, 0);
+
+  hdl.cancel();
+  BOOST_CHECK_EQUAL(nCancels, 1);
+
+  hdl = CancelHandle();
+  BOOST_CHECK_EQUAL(nCancels, 1);
+}
+
+BOOST_AUTO_TEST_SUITE_END() // PlainHandle
+
+BOOST_AUTO_TEST_SUITE(ScopedHandle)
+
+BOOST_AUTO_TEST_CASE(ManualCancel)
+{
+  int nCancels = 0;
+  {
+    ScopedCancelHandle hdl = makeDummyCancelHandle(nCancels);
+    BOOST_CHECK_EQUAL(nCancels, 0);
+
+    hdl.cancel();
+    BOOST_CHECK_EQUAL(nCancels, 1);
+  } // hdl goes out of scope
+  BOOST_CHECK_EQUAL(nCancels, 1);
+}
+
+BOOST_AUTO_TEST_CASE(Destruct)
+{
+  int nCancels = 0;
+  {
+    ScopedCancelHandle hdl = makeDummyCancelHandle(nCancels);
+    BOOST_CHECK_EQUAL(nCancels, 0);
+  } // hdl goes out of scope
+  BOOST_CHECK_EQUAL(nCancels, 1);
+}
+
+BOOST_AUTO_TEST_CASE(Assign)
+{
+  int nCancels1 = 0, nCancels2 = 0;
+  {
+    ScopedCancelHandle hdl = makeDummyCancelHandle(nCancels1);
+    hdl = makeDummyCancelHandle(nCancels2);
+    BOOST_CHECK_EQUAL(nCancels1, 1);
+    BOOST_CHECK_EQUAL(nCancels2, 0);
+  } // hdl goes out of scope
+  BOOST_CHECK_EQUAL(nCancels2, 1);
+}
+
+BOOST_AUTO_TEST_CASE(Release)
+{
+  int nCancels = 0;
+  {
+    ScopedCancelHandle hdl = makeDummyCancelHandle(nCancels);
+    hdl.release();
+    hdl.cancel(); // no effect
+  } // hdl goes out of scope
+  BOOST_CHECK_EQUAL(nCancels, 0);
+}
+
+BOOST_AUTO_TEST_CASE(MoveConstruct)
+{
+  int nCancels = 0;
+  unique_ptr<ScopedCancelHandle> hdl1;
+  {
+    ScopedCancelHandle hdl2 = makeDummyCancelHandle(nCancels);
+    hdl1 = make_unique<ScopedCancelHandle>(std::move(hdl2));
+  } // hdl2 goes out of scope
+  BOOST_CHECK_EQUAL(nCancels, 0);
+  hdl1.reset();
+  BOOST_CHECK_EQUAL(nCancels, 1);
+}
+
+BOOST_AUTO_TEST_CASE(MoveAssign)
+{
+  int nCancels = 0;
+  {
+    ScopedCancelHandle hdl1;
+    {
+      ScopedCancelHandle hdl2 = makeDummyCancelHandle(nCancels);
+      hdl1 = std::move(hdl2);
+    } // hdl2 goes out of scope
+    BOOST_CHECK_EQUAL(nCancels, 0);
+  } // hdl1 goes out of scope
+  BOOST_CHECK_EQUAL(nCancels, 1);
+}
+
+BOOST_AUTO_TEST_SUITE_END() // ScopedHandle
+BOOST_AUTO_TEST_SUITE_END() // TestCancelHandle
+BOOST_AUTO_TEST_SUITE_END() // Detail
+
+} // namespace tests
+} // namespace detail
+} // namespace ndn