Adding upstream version 2.4.1.upstream/2.4.1 upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
author: Daniel Baumann <daniel.baumann@progress-linux.org> 2024-04-13 12:15:43 +0000
committer: Daniel Baumann <daniel.baumann@progress-linux.org> 2024-04-13 12:15:43 +0000
commit: f5f56e1a1c4d9e9496fcb9d81131066a964ccd23 (patch)
tree: 49e44c6f87febed37efb953ab5485aa49f6481a7 /src/lib/dhcp_ddns/tests
parent: Initial commit. (diff)
download: isc-kea-f5f56e1a1c4d9e9496fcb9d81131066a964ccd23.tar.xz
isc-kea-f5f56e1a1c4d9e9496fcb9d81131066a964ccd23.zip
7 files changed, 3381 insertions, 0 deletions
diff --git a/src/lib/dhcp_ddns/tests/Makefile.am b/src/lib/dhcp_ddns/tests/Makefile.am
new file mode 100644
index 0000000..68ae6ba
--- /dev/null
+++ b/src/lib/dhcp_ddns/tests/Makefile.am
@@ -0,0 +1,48 @@
+SUBDIRS = .
+
+AM_CPPFLAGS = -I$(top_builddir)/src/lib -I$(top_srcdir)/src/lib
+AM_CPPFLAGS += $(BOOST_INCLUDES)
+AM_CPPFLAGS += -DTEST_DATA_BUILDDIR=\"$(abs_top_builddir)/src/lib/dhcp_ddns/tests\"
+AM_CPPFLAGS += -DINSTALL_PROG=\"$(abs_top_srcdir)/install-sh\"
+
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+
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+if HAVE_GTEST
+TESTS += libdhcp_ddns_unittests
+
+libdhcp_ddns_unittests_SOURCES  = run_unittests.cc
+libdhcp_ddns_unittests_SOURCES += ncr_unittests.cc
+libdhcp_ddns_unittests_SOURCES += ncr_udp_unittests.cc
+libdhcp_ddns_unittests_SOURCES += test_utils.cc test_utils.h
+
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+
+libdhcp_ddns_unittests_LDADD  = $(top_builddir)/src/lib/dhcp_ddns/libkea-dhcp_ddns.la
+libdhcp_ddns_unittests_LDADD += $(top_builddir)/src/lib/stats/libkea-stats.la
+libdhcp_ddns_unittests_LDADD += $(top_builddir)/src/lib/dhcp/libkea-dhcp++.la
+libdhcp_ddns_unittests_LDADD += $(top_builddir)/src/lib/hooks/libkea-hooks.la
+libdhcp_ddns_unittests_LDADD += $(top_builddir)/src/lib/cc/libkea-cc.la
+libdhcp_ddns_unittests_LDADD += $(top_builddir)/src/lib/asiolink/libkea-asiolink.la
+libdhcp_ddns_unittests_LDADD += $(top_builddir)/src/lib/dns/libkea-dns++.la
+libdhcp_ddns_unittests_LDADD += $(top_builddir)/src/lib/cryptolink/libkea-cryptolink.la
+libdhcp_ddns_unittests_LDADD += $(top_builddir)/src/lib/log/libkea-log.la
+libdhcp_ddns_unittests_LDADD += $(top_builddir)/src/lib/util/libkea-util.la
+libdhcp_ddns_unittests_LDADD += $(top_builddir)/src/lib/exceptions/libkea-exceptions.la
+libdhcp_ddns_unittests_LDADD += $(LOG4CPLUS_LIBS) $(CRYPTO_LIBS)
+libdhcp_ddns_unittests_LDADD += $(BOOST_LIBS) $(GTEST_LDADD)
+endif
+
+noinst_PROGRAMS = $(TESTS)
diff --git a/src/lib/dhcp_ddns/tests/Makefile.in b/src/lib/dhcp_ddns/tests/Makefile.in
new file mode 100644
index 0000000..441af44
--- /dev/null
+++ b/src/lib/dhcp_ddns/tests/Makefile.in
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diff --git a/src/lib/dhcp_ddns/tests/ncr_udp_unittests.cc b/src/lib/dhcp_ddns/tests/ncr_udp_unittests.cc
new file mode 100644
index 0000000..b63ed8c
--- /dev/null
+++ b/src/lib/dhcp_ddns/tests/ncr_udp_unittests.cc
@@ -0,0 +1,1428 @@
+// Copyright (C) 2013-2021 Internet Systems Consortium, Inc. ("ISC")
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+#include <config.h>
+
+#include <gtest/gtest.h>
+
+#include <asiolink/interval_timer.h>
+#include <dhcp_ddns/ncr_io.h>
+#include <dhcp_ddns/ncr_udp.h>
+#include <util/multi_threading_mgr.h>
+#include <util/time_utilities.h>
+#include <test_utils.h>
+
+#include <boost/asio/ip/udp.hpp>
+
+#include <functional>
+#include <algorithm>
+
+#include <sys/select.h>
+
+using namespace std;
+using namespace isc;
+using namespace isc::util;
+using namespace isc::dhcp_ddns;
+
+namespace {
+
+/// @brief Defines a list of valid JSON NameChangeRequest test messages.
+const char *valid_msgs[] =
+{
+    // Valid Add.
+     "{"
+     " \"change-type\" : 0 , "
+     " \"forward-change\" : true , "
+     " \"reverse-change\" : false , "
+     " \"fqdn\" : \"walah.walah.com\" , "
+     " \"ip-address\" : \"192.168.2.1\" , "
+     " \"dhcid\" : \"010203040A7F8E3D\" , "
+     " \"lease-expires-on\" : \"20130121132405\" , "
+     " \"lease-length\" : 1300, "
+     " \"use-conflict-resolution\": true"
+     "}",
+    // Valid Remove.
+     "{"
+     " \"change-type\" : 1 , "
+     " \"forward-change\" : true , "
+     " \"reverse-change\" : false , "
+     " \"fqdn\" : \"walah.walah.com\" , "
+     " \"ip-address\" : \"192.168.2.1\" , "
+     " \"dhcid\" : \"010203040A7F8E3D\" , "
+     " \"lease-expires-on\" : \"20130121132405\" , "
+     " \"lease-length\" : 1300, "
+     " \"use-conflict-resolution\": false"
+     "}",
+     // Valid Add with IPv6 address
+     "{"
+     " \"change-type\" : 0 , "
+     " \"forward-change\" : true , "
+     " \"reverse-change\" : false , "
+     " \"fqdn\" : \"walah.walah.com\" , "
+     " \"ip-address\" : \"fe80::2acf:e9ff:fe12:e56f\" , "
+     " \"dhcid\" : \"010203040A7F8E3D\" , "
+     " \"lease-expires-on\" : \"20130121132405\" , "
+     " \"lease-length\" : 1300, "
+     " \"use-conflict-resolution\" : true"
+     "}"
+};
+
+const char* TEST_ADDRESS = "127.0.0.1";
+const uint32_t LISTENER_PORT = 5301;
+const uint32_t SENDER_PORT = LISTENER_PORT+1;
+const long TEST_TIMEOUT = 5 * 1000;
+
+/// @brief A NOP derivation for constructor test purposes.
+class SimpleListenHandler : public NameChangeListener::RequestReceiveHandler {
+public:
+    virtual void operator ()(const NameChangeListener::Result,
+                             NameChangeRequestPtr&) {
+    }
+};
+
+/// @brief Tests the NameChangeUDPListener constructors.
+/// This test verifies that:
+/// 1. Given valid parameters, the listener constructor works
+TEST(NameChangeUDPListenerBasicTest, constructionTests) {
+    // Verify the default constructor works.
+    isc::asiolink::IOAddress ip_address(TEST_ADDRESS);
+    uint32_t port = LISTENER_PORT;
+    isc::asiolink::IOService io_service;
+    SimpleListenHandler ncr_handler;
+    // Verify that valid constructor works.
+    EXPECT_NO_THROW(NameChangeUDPListener(ip_address, port, FMT_JSON,
+                                          ncr_handler));
+}
+
+/// @brief Tests NameChangeUDPListener starting and stopping listening .
+/// This test verifies that the listener will:
+/// 1. Enter listening state
+/// 2. If in the listening state, does not allow calls to start listening
+/// 3. Exist the listening state
+/// 4. Return to the listening state after stopping
+TEST(NameChangeUDPListenerBasicTest, basicListenTests) {
+    // Verify the default constructor works.
+    isc::asiolink::IOAddress ip_address(TEST_ADDRESS);
+    uint32_t port = LISTENER_PORT;
+    isc::asiolink::IOService io_service;
+    SimpleListenHandler ncr_handler;
+
+    NameChangeListenerPtr listener;
+    ASSERT_NO_THROW(listener.reset(
+        new NameChangeUDPListener(ip_address, port, FMT_JSON, ncr_handler)));
+
+    // Verify that we can start listening.
+    EXPECT_NO_THROW(listener->startListening(io_service));
+
+    // Verify that we are in listening mode.
+    EXPECT_TRUE(listener->amListening());
+    // Verify that a read is in progress.
+    EXPECT_TRUE(listener->isIoPending());
+
+    // Verify that attempting to listen when we already are is an error.
+    EXPECT_THROW(listener->startListening(io_service), NcrListenerError);
+
+    // Verify that we can stop listening.
+    EXPECT_NO_THROW(listener->stopListening());
+    EXPECT_FALSE(listener->amListening());
+
+    // Verify that IO pending is still true, as IO cancel event has not yet
+    // occurred.
+    EXPECT_TRUE(listener->isIoPending());
+
+    // Verify that IO pending is false, after cancel event occurs.
+    EXPECT_NO_THROW(io_service.run_one());
+    EXPECT_FALSE(listener->isIoPending());
+
+    // Verify that attempting to stop listening when we are not is ok.
+    EXPECT_NO_THROW(listener->stopListening());
+
+    // Verify that we can re-enter listening.
+    EXPECT_NO_THROW(listener->startListening(io_service));
+    EXPECT_TRUE(listener->amListening());
+}
+
+/// @brief Compares two NameChangeRequests for equality.
+bool checkSendVsReceived(NameChangeRequestPtr sent_ncr,
+                         NameChangeRequestPtr received_ncr) {
+    return ((sent_ncr && received_ncr) &&
+        (*sent_ncr == *received_ncr));
+}
+
+/// @brief Text fixture for testing NameChangeUDPListener
+class NameChangeUDPListenerTest : public virtual ::testing::Test,
+                                  NameChangeListener::RequestReceiveHandler {
+public:
+    isc::asiolink::IOService io_service_;
+    NameChangeListener::Result result_;
+    NameChangeRequestPtr sent_ncr_;
+    NameChangeRequestPtr received_ncr_;
+    NameChangeListenerPtr listener_;
+    isc::asiolink::IntervalTimer test_timer_;
+
+    /// @brief Constructor
+    //
+    // Instantiates the listener member and the test timer. The timer is used
+    // to ensure a test doesn't go awry and hang forever.
+    NameChangeUDPListenerTest()
+        : io_service_(), result_(NameChangeListener::SUCCESS),
+          test_timer_(io_service_) {
+        isc::asiolink::IOAddress addr(TEST_ADDRESS);
+        listener_.reset(new NameChangeUDPListener(addr, LISTENER_PORT,
+                                              FMT_JSON, *this, true));
+
+        // Set the test timeout to break any running tasks if they hang.
+        test_timer_.setup(std::bind(&NameChangeUDPListenerTest::
+                                    testTimeoutHandler, this),
+                          TEST_TIMEOUT);
+    }
+
+    virtual ~NameChangeUDPListenerTest(){
+    }
+
+
+    /// @brief Converts JSON string into an NCR and sends it to the listener.
+    ///
+    void sendNcr(const std::string& msg) {
+        // Build an NCR  from json string. This verifies that the
+        // test string is valid.
+        ASSERT_NO_THROW(sent_ncr_ = NameChangeRequest::fromJSON(msg));
+
+        // Now use the NCR to write JSON to an output buffer.
+        isc::util::OutputBuffer ncr_buffer(1024);
+        ASSERT_NO_THROW(sent_ncr_->toFormat(FMT_JSON, ncr_buffer));
+
+        // Create a UDP socket through which our "sender" will send the NCR.
+        boost::asio::ip::udp::socket
+            udp_socket(io_service_.get_io_service(), boost::asio::ip::udp::v4());
+
+        // Create an endpoint pointed at the listener.
+        boost::asio::ip::udp::endpoint
+            listener_endpoint(boost::asio::ip::address::from_string(TEST_ADDRESS),
+                              LISTENER_PORT);
+
+        // A response message is now ready to send. Send it!
+        // Note this uses a synchronous send so it ships immediately.
+        // If listener isn't in listening mode, it will get missed.
+        udp_socket.send_to(boost::asio::buffer(ncr_buffer.getData(),
+                                     ncr_buffer.getLength()),
+                            listener_endpoint);
+    }
+
+    /// @brief RequestReceiveHandler operator implementation for receiving NCRs.
+    ///
+    /// The fixture acts as the "application" layer.  It derives from
+    /// RequestReceiveHandler and as such implements operator() in order to
+    /// receive NCRs.
+    virtual void operator ()(const NameChangeListener::Result result,
+                             NameChangeRequestPtr& ncr) {
+        // save the result and the NCR we received
+        result_ = result;
+        received_ncr_ = ncr;
+    }
+
+    /// @brief Handler invoked when test timeout is hit
+    ///
+    /// This callback stops all running (hanging) tasks on IO service.
+    void testTimeoutHandler() {
+        io_service_.stop();
+        FAIL() << "Test timeout hit.";
+    }
+};
+
+/// @brief  Tests NameChangeUDPListener ability to receive NCRs.
+/// This test verifies that a listener can enter listening mode and
+/// receive NCRs in wire format on its UDP socket; reconstruct the
+/// NCRs and delivery them to the "application" layer.
+TEST_F(NameChangeUDPListenerTest, basicReceiveTests) {
+    // Verify we can enter listening mode.
+    ASSERT_FALSE(listener_->amListening());
+    ASSERT_NO_THROW(listener_->startListening(io_service_));
+    ASSERT_TRUE(listener_->amListening());
+    ASSERT_TRUE(listener_->isIoPending());
+
+    // Iterate over a series of requests, sending and receiving one
+    /// at time.
+    int num_msgs = sizeof(valid_msgs)/sizeof(char*);
+    for (int i = 0; i < num_msgs; i++) {
+        // We are not verifying ability to send, so if we can't test is over.
+        ASSERT_NO_THROW(sendNcr(valid_msgs[i]));
+
+        // Execute no more then one event, which should be receive complete.
+        EXPECT_NO_THROW(io_service_.run_one());
+
+        // Verify the "application" status value for a successful complete.
+        EXPECT_EQ(NameChangeListener::SUCCESS, result_);
+
+        // Verify the received request matches the sent request.
+        EXPECT_TRUE(checkSendVsReceived(sent_ncr_, received_ncr_));
+    }
+
+    // Verify we can gracefully stop listening.
+    EXPECT_NO_THROW(listener_->stopListening());
+    EXPECT_FALSE(listener_->amListening());
+
+    // Verify that IO pending is false, after cancel event occurs.
+    EXPECT_NO_THROW(io_service_.run_one());
+    EXPECT_FALSE(listener_->isIoPending());
+}
+
+/// @brief A NOP derivation for constructor test purposes.
+class SimpleSendHandler : public NameChangeSender::RequestSendHandler {
+public:
+    SimpleSendHandler() : pass_count_(0), error_count_(0) {
+    }
+
+    virtual void operator ()(const NameChangeSender::Result result,
+                             NameChangeRequestPtr&) {
+        if (result == NameChangeSender::SUCCESS) {
+            ++pass_count_;
+        } else {
+            ++error_count_;
+        }
+    }
+
+    int pass_count_;
+    int error_count_;
+};
+
+/// @brief Text fixture for testing NameChangeUDPListener
+class NameChangeUDPSenderBasicTest : public virtual ::testing::Test {
+public:
+    NameChangeUDPSenderBasicTest() {
+        // Disable multi-threading
+        MultiThreadingMgr::instance().setMode(false);
+    }
+
+    ~NameChangeUDPSenderBasicTest() {
+        // Disable multi-threading
+        MultiThreadingMgr::instance().setMode(false);
+    }
+};
+
+/// @brief Tests the NameChangeUDPSender constructors.
+/// This test verifies that:
+/// 1. Constructing with a max queue size of 0 is not allowed
+/// 2. Given valid parameters, the sender constructor works
+/// 3. Default construction provides default max queue size
+/// 4. Construction with a custom max queue size works
+TEST_F(NameChangeUDPSenderBasicTest, constructionTests) {
+    isc::asiolink::IOAddress ip_address(TEST_ADDRESS);
+    uint32_t port = SENDER_PORT;
+    isc::asiolink::IOService io_service;
+    SimpleSendHandler ncr_handler;
+
+    // Verify that constructing with an queue size of zero is not allowed.
+    EXPECT_THROW(NameChangeUDPSender(ip_address, port,
+        ip_address, port, FMT_JSON, ncr_handler, 0), NcrSenderError);
+
+    NameChangeSenderPtr sender;
+    // Verify that valid constructor works.
+    EXPECT_NO_THROW(sender.reset(
+                    new NameChangeUDPSender(ip_address, port, ip_address, port,
+                                            FMT_JSON, ncr_handler)));
+
+    // Verify that send queue default max is correct.
+    size_t expected = NameChangeSender::MAX_QUEUE_DEFAULT;
+    EXPECT_EQ(expected, sender->getQueueMaxSize());
+
+    // Verify that constructor with a valid custom queue size works.
+    EXPECT_NO_THROW(sender.reset(
+                    new NameChangeUDPSender(ip_address, port, ip_address, port,
+                                            FMT_JSON, ncr_handler, 100)));
+
+    EXPECT_EQ(100, sender->getQueueMaxSize());
+}
+
+/// @brief Tests the NameChangeUDPSender constructors.
+/// This test verifies that:
+/// 1. Constructing with a max queue size of 0 is not allowed
+/// 2. Given valid parameters, the sender constructor works
+/// 3. Default construction provides default max queue size
+/// 4. Construction with a custom max queue size works
+TEST_F(NameChangeUDPSenderBasicTest, constructionTestsMultiThreading) {
+    // Enable multi-threading
+    MultiThreadingMgr::instance().setMode(true);
+
+    isc::asiolink::IOAddress ip_address(TEST_ADDRESS);
+    uint32_t port = SENDER_PORT;
+    isc::asiolink::IOService io_service;
+    SimpleSendHandler ncr_handler;
+
+    // Verify that constructing with an queue size of zero is not allowed.
+    EXPECT_THROW(NameChangeUDPSender(ip_address, port,
+        ip_address, port, FMT_JSON, ncr_handler, 0), NcrSenderError);
+
+    NameChangeSenderPtr sender;
+    // Verify that valid constructor works.
+    EXPECT_NO_THROW(sender.reset(
+                    new NameChangeUDPSender(ip_address, port, ip_address, port,
+                                            FMT_JSON, ncr_handler)));
+
+    // Verify that send queue default max is correct.
+    size_t expected = NameChangeSender::MAX_QUEUE_DEFAULT;
+    EXPECT_EQ(expected, sender->getQueueMaxSize());
+
+    // Verify that constructor with a valid custom queue size works.
+    EXPECT_NO_THROW(sender.reset(
+                    new NameChangeUDPSender(ip_address, port, ip_address, port,
+                                            FMT_JSON, ncr_handler, 100)));
+
+    EXPECT_EQ(100, sender->getQueueMaxSize());
+}
+
+/// @brief Tests NameChangeUDPSender basic send functionality
+TEST_F(NameChangeUDPSenderBasicTest, basicSendTests) {
+    isc::asiolink::IOAddress ip_address(TEST_ADDRESS);
+    isc::asiolink::IOService io_service;
+    SimpleSendHandler ncr_handler;
+
+    // Tests are based on a list of messages, get the count now.
+    int num_msgs = sizeof(valid_msgs)/sizeof(char*);
+
+    // Create the sender, setting the queue max equal to the number of
+    // messages we will have in the list.
+    NameChangeUDPSender sender(ip_address, SENDER_PORT, ip_address,
+                               LISTENER_PORT, FMT_JSON, ncr_handler,
+                               num_msgs, true);
+
+    // Verify that we can start sending.
+    EXPECT_NO_THROW(sender.startSending(io_service));
+    EXPECT_TRUE(sender.amSending());
+
+    // Verify that attempting to send when we already are is an error.
+    EXPECT_THROW(sender.startSending(io_service), NcrSenderError);
+
+    // Verify that we can stop sending.
+    EXPECT_NO_THROW(sender.stopSending());
+    EXPECT_FALSE(sender.amSending());
+
+    // Verify that attempting to stop sending when we are not is ok.
+    EXPECT_NO_THROW(sender.stopSending());
+
+    // Verify that we can re-enter sending after stopping.
+    EXPECT_NO_THROW(sender.startSending(io_service));
+    EXPECT_TRUE(sender.amSending());
+
+    // Fetch the sender's select-fd.
+    int select_fd = sender.getSelectFd();
+
+    // Verify select_fd is valid and currently shows no ready to read.
+    ASSERT_NE(util::WatchSocket::SOCKET_NOT_VALID, select_fd);
+
+    // Make sure select_fd does evaluates to not ready via select and
+    // that ioReady() method agrees.
+    ASSERT_EQ(0, selectCheck(select_fd));
+    ASSERT_FALSE(sender.ioReady());
+
+    // Iterate over a series of messages, sending each one. Since we
+    // do not invoke IOService::run, then the messages should accumulate
+    // in the queue.
+    NameChangeRequestPtr ncr;
+    NameChangeRequestPtr ncr2;
+    for (int i = 0; i < num_msgs; i++) {
+        ASSERT_NO_THROW(ncr = NameChangeRequest::fromJSON(valid_msgs[i]));
+        EXPECT_NO_THROW(sender.sendRequest(ncr));
+        // Verify that the queue count increments in step with each send.
+        EXPECT_EQ(i+1, sender.getQueueSize());
+
+        // Verify that peekAt(i) returns the NCR we just added.
+        ASSERT_NO_THROW(ncr2 = sender.peekAt(i));
+        ASSERT_TRUE(ncr2);
+        EXPECT_TRUE(*ncr == *ncr2);
+    }
+
+    // Verify that attempting to peek beyond the end of the queue, throws.
+    ASSERT_THROW(sender.peekAt(sender.getQueueSize()+1), NcrSenderError);
+
+    // Verify that attempting to send an additional message results in a
+    // queue full exception.
+    EXPECT_THROW(sender.sendRequest(ncr), NcrSenderQueueFull);
+
+    // Loop for the number of valid messages. So long as there is at least
+    // on NCR in the queue, select-fd indicate ready to read. Invoke
+    // IOService::run_one. This should complete the send of exactly one
+    // message and the queue count should decrement accordingly.
+    for (int i = num_msgs; i > 0; i--) {
+        // Make sure select_fd does evaluates to ready via select and
+        // that ioReady() method agrees.
+        ASSERT_TRUE(selectCheck(select_fd) > 0);
+        ASSERT_TRUE(sender.ioReady());
+
+        // Execute at one ready handler.
+        ASSERT_NO_THROW(sender.runReadyIO());
+
+        // Verify that the queue count decrements in step with each run.
+        EXPECT_EQ(i-1, sender.getQueueSize());
+    }
+
+    // Make sure select_fd does evaluates to not ready via select and
+    // that ioReady() method agrees.
+    ASSERT_EQ(0, selectCheck(select_fd));
+    ASSERT_FALSE(sender.ioReady());
+
+    // Verify that the queue is empty.
+    EXPECT_EQ(0, sender.getQueueSize());
+
+    // Verify that we can add back to the queue
+    EXPECT_NO_THROW(sender.sendRequest(ncr));
+    EXPECT_EQ(1, sender.getQueueSize());
+
+    // Verify that we can remove the current entry at the front of the queue.
+    EXPECT_NO_THROW(sender.skipNext());
+    EXPECT_EQ(0, sender.getQueueSize());
+
+    // Verify that flushing the queue is not allowed in sending state.
+    EXPECT_THROW(sender.clearSendQueue(), NcrSenderError);
+
+    // Put num_msgs messages on the queue.
+    for (int i = 0; i < num_msgs; i++) {
+        ASSERT_NO_THROW(ncr = NameChangeRequest::fromJSON(valid_msgs[i]));
+        EXPECT_NO_THROW(sender.sendRequest(ncr));
+    }
+
+    // Make sure we have number of messages expected.
+    EXPECT_EQ(num_msgs, sender.getQueueSize());
+
+    // Verify that we can gracefully stop sending.
+    EXPECT_NO_THROW(sender.stopSending());
+    EXPECT_FALSE(sender.amSending());
+
+    // Verify that the queue is preserved after leaving sending state.
+    EXPECT_EQ(num_msgs - 1, sender.getQueueSize());
+
+    // Verify that flushing the queue works when not sending.
+    EXPECT_NO_THROW(sender.clearSendQueue());
+    EXPECT_EQ(0, sender.getQueueSize());
+}
+
+/// @brief Tests NameChangeUDPSender basic send functionality
+TEST_F(NameChangeUDPSenderBasicTest, basicSendTestsMultiThreading) {
+    // Enable multi-threading
+    MultiThreadingMgr::instance().setMode(true);
+
+    isc::asiolink::IOAddress ip_address(TEST_ADDRESS);
+    isc::asiolink::IOService io_service;
+    SimpleSendHandler ncr_handler;
+
+    // Tests are based on a list of messages, get the count now.
+    int num_msgs = sizeof(valid_msgs)/sizeof(char*);
+
+    // Create the sender, setting the queue max equal to the number of
+    // messages we will have in the list.
+    NameChangeUDPSender sender(ip_address, SENDER_PORT, ip_address,
+                               LISTENER_PORT, FMT_JSON, ncr_handler,
+                               num_msgs, true);
+
+    // Verify that we can start sending.
+    EXPECT_NO_THROW(sender.startSending(io_service));
+    EXPECT_TRUE(sender.amSending());
+
+    // Verify that attempting to send when we already are is an error.
+    EXPECT_THROW(sender.startSending(io_service), NcrSenderError);
+
+    // Verify that we can stop sending.
+    EXPECT_NO_THROW(sender.stopSending());
+    EXPECT_FALSE(sender.amSending());
+
+    // Verify that attempting to stop sending when we are not is ok.
+    EXPECT_NO_THROW(sender.stopSending());
+
+    // Verify that we can re-enter sending after stopping.
+    EXPECT_NO_THROW(sender.startSending(io_service));
+    EXPECT_TRUE(sender.amSending());
+
+    // Fetch the sender's select-fd.
+    int select_fd = sender.getSelectFd();
+
+    // Verify select_fd is valid and currently shows no ready to read.
+    ASSERT_NE(util::WatchSocket::SOCKET_NOT_VALID, select_fd);
+
+    // Make sure select_fd does evaluates to not ready via select and
+    // that ioReady() method agrees.
+    ASSERT_EQ(0, selectCheck(select_fd));
+    ASSERT_FALSE(sender.ioReady());
+
+    // Iterate over a series of messages, sending each one. Since we
+    // do not invoke IOService::run, then the messages should accumulate
+    // in the queue.
+    NameChangeRequestPtr ncr;
+    NameChangeRequestPtr ncr2;
+    for (int i = 0; i < num_msgs; i++) {
+        ASSERT_NO_THROW(ncr = NameChangeRequest::fromJSON(valid_msgs[i]));
+        EXPECT_NO_THROW(sender.sendRequest(ncr));
+        // Verify that the queue count increments in step with each send.
+        EXPECT_EQ(i+1, sender.getQueueSize());
+
+        // Verify that peekAt(i) returns the NCR we just added.
+        ASSERT_NO_THROW(ncr2 = sender.peekAt(i));
+        ASSERT_TRUE(ncr2);
+        EXPECT_TRUE(*ncr == *ncr2);
+    }
+
+    // Verify that attempting to peek beyond the end of the queue, throws.
+    ASSERT_THROW(sender.peekAt(sender.getQueueSize()+1), NcrSenderError);
+
+    // Verify that attempting to send an additional message results in a
+    // queue full exception.
+    EXPECT_THROW(sender.sendRequest(ncr), NcrSenderQueueFull);
+
+    // Loop for the number of valid messages. So long as there is at least
+    // on NCR in the queue, select-fd indicate ready to read. Invoke
+    // IOService::run_one. This should complete the send of exactly one
+    // message and the queue count should decrement accordingly.
+    for (int i = num_msgs; i > 0; i--) {
+        // Make sure select_fd does evaluates to ready via select and
+        // that ioReady() method agrees.
+        ASSERT_TRUE(selectCheck(select_fd) > 0);
+        ASSERT_TRUE(sender.ioReady());
+
+        // Execute at one ready handler.
+        ASSERT_NO_THROW(sender.runReadyIO());
+
+        // Verify that the queue count decrements in step with each run.
+        EXPECT_EQ(i-1, sender.getQueueSize());
+    }
+
+    // Make sure select_fd does evaluates to not ready via select and
+    // that ioReady() method agrees.
+    ASSERT_EQ(0, selectCheck(select_fd));
+    ASSERT_FALSE(sender.ioReady());
+
+    // Verify that the queue is empty.
+    EXPECT_EQ(0, sender.getQueueSize());
+
+    // Verify that we can add back to the queue
+    EXPECT_NO_THROW(sender.sendRequest(ncr));
+    EXPECT_EQ(1, sender.getQueueSize());
+
+    // Verify that we can remove the current entry at the front of the queue.
+    EXPECT_NO_THROW(sender.skipNext());
+    EXPECT_EQ(0, sender.getQueueSize());
+
+    // Verify that flushing the queue is not allowed in sending state.
+    EXPECT_THROW(sender.clearSendQueue(), NcrSenderError);
+
+    // Put num_msgs messages on the queue.
+    for (int i = 0; i < num_msgs; i++) {
+        ASSERT_NO_THROW(ncr = NameChangeRequest::fromJSON(valid_msgs[i]));
+        EXPECT_NO_THROW(sender.sendRequest(ncr));
+    }
+
+    // Make sure we have number of messages expected.
+    EXPECT_EQ(num_msgs, sender.getQueueSize());
+
+    // Verify that we can gracefully stop sending.
+    EXPECT_NO_THROW(sender.stopSending());
+    EXPECT_FALSE(sender.amSending());
+
+    // Verify that the queue is preserved after leaving sending state.
+    EXPECT_EQ(num_msgs - 1, sender.getQueueSize());
+
+    // Verify that flushing the queue works when not sending.
+    EXPECT_NO_THROW(sender.clearSendQueue());
+    EXPECT_EQ(0, sender.getQueueSize());
+}
+
+/// @brief Tests that sending gets kick-started if the queue isn't empty
+/// when startSending is called.
+TEST_F(NameChangeUDPSenderBasicTest, autoStart) {
+    isc::asiolink::IOAddress ip_address(TEST_ADDRESS);
+    isc::asiolink::IOService io_service;
+    SimpleSendHandler ncr_handler;
+
+    // Tests are based on a list of messages, get the count now.
+    int num_msgs = sizeof(valid_msgs)/sizeof(char*);
+
+    // Create the sender, setting the queue max equal to the number of
+    // messages we will have in the list.
+    NameChangeUDPSender sender(ip_address, SENDER_PORT, ip_address,
+                               LISTENER_PORT, FMT_JSON, ncr_handler,
+                               num_msgs, true);
+
+    // Verify that we can start sending.
+    EXPECT_NO_THROW(sender.startSending(io_service));
+    EXPECT_TRUE(sender.amSending());
+
+    // Queue up messages.
+    NameChangeRequestPtr ncr;
+    for (int i = 0; i < num_msgs; i++) {
+        ASSERT_NO_THROW(ncr = NameChangeRequest::fromJSON(valid_msgs[i]));
+        EXPECT_NO_THROW(sender.sendRequest(ncr));
+    }
+    // Make sure queue count is what we expect.
+    EXPECT_EQ(num_msgs, sender.getQueueSize());
+
+    // Stop sending.
+    ASSERT_NO_THROW(sender.stopSending());
+    ASSERT_FALSE(sender.amSending());
+
+    // We should have completed the first message only.
+    EXPECT_EQ(--num_msgs, sender.getQueueSize());
+
+    // Restart sending.
+    EXPECT_NO_THROW(sender.startSending(io_service));
+
+    // We should be able to loop through remaining messages and send them.
+    for (int i = num_msgs; i > 0; i--) {
+        // ioReady() should evaluate to true.
+        ASSERT_TRUE(sender.ioReady());
+
+        // Execute at one ready handler.
+        ASSERT_NO_THROW(sender.runReadyIO());
+    }
+
+    // Verify that the queue is empty.
+    EXPECT_EQ(0, sender.getQueueSize());
+}
+
+/// @brief Tests that sending gets kick-started if the queue isn't empty
+/// when startSending is called.
+TEST_F(NameChangeUDPSenderBasicTest, autoStartMultiThreading) {
+    // Enable multi-threading
+    MultiThreadingMgr::instance().setMode(true);
+
+    isc::asiolink::IOAddress ip_address(TEST_ADDRESS);
+    isc::asiolink::IOService io_service;
+    SimpleSendHandler ncr_handler;
+
+    // Tests are based on a list of messages, get the count now.
+    int num_msgs = sizeof(valid_msgs)/sizeof(char*);
+
+    // Create the sender, setting the queue max equal to the number of
+    // messages we will have in the list.
+    NameChangeUDPSender sender(ip_address, SENDER_PORT, ip_address,
+                               LISTENER_PORT, FMT_JSON, ncr_handler,
+                               num_msgs, true);
+
+    // Verify that we can start sending.
+    EXPECT_NO_THROW(sender.startSending(io_service));
+    EXPECT_TRUE(sender.amSending());
+
+    // Queue up messages.
+    NameChangeRequestPtr ncr;
+    for (int i = 0; i < num_msgs; i++) {
+        ASSERT_NO_THROW(ncr = NameChangeRequest::fromJSON(valid_msgs[i]));
+        EXPECT_NO_THROW(sender.sendRequest(ncr));
+    }
+    // Make sure queue count is what we expect.
+    EXPECT_EQ(num_msgs, sender.getQueueSize());
+
+    // Stop sending.
+    ASSERT_NO_THROW(sender.stopSending());
+    ASSERT_FALSE(sender.amSending());
+
+    // We should have completed the first message only.
+    EXPECT_EQ(--num_msgs, sender.getQueueSize());
+
+    // Restart sending.
+    EXPECT_NO_THROW(sender.startSending(io_service));
+
+    // We should be able to loop through remaining messages and send them.
+    for (int i = num_msgs; i > 0; i--) {
+        // ioReady() should evaluate to true.
+        ASSERT_TRUE(sender.ioReady());
+
+        // Execute at one ready handler.
+        ASSERT_NO_THROW(sender.runReadyIO());
+    }
+
+    // Verify that the queue is empty.
+    EXPECT_EQ(0, sender.getQueueSize());
+}
+
+/// @brief Tests NameChangeUDPSender basic send  with INADDR_ANY and port 0.
+TEST_F(NameChangeUDPSenderBasicTest, anyAddressSend) {
+    isc::asiolink::IOAddress ip_address(TEST_ADDRESS);
+    isc::asiolink::IOAddress any_address("0.0.0.0");
+    isc::asiolink::IOService io_service;
+    SimpleSendHandler ncr_handler;
+
+    // Tests are based on a list of messages, get the count now.
+    int num_msgs = sizeof(valid_msgs)/sizeof(char*);
+
+    // Create the sender, setting the queue max equal to the number of
+    // messages we will have in the list.
+    NameChangeUDPSender sender(any_address, 0, ip_address, LISTENER_PORT,
+                               FMT_JSON, ncr_handler, num_msgs);
+
+    // Enter send mode.
+    ASSERT_NO_THROW(sender.startSending(io_service));
+    EXPECT_TRUE(sender.amSending());
+
+    // Create and queue up a message.
+    NameChangeRequestPtr ncr;
+    ASSERT_NO_THROW(ncr = NameChangeRequest::fromJSON(valid_msgs[0]));
+    EXPECT_NO_THROW(sender.sendRequest(ncr));
+    EXPECT_EQ(1, sender.getQueueSize());
+
+    // Verify we have a ready IO, then execute at one ready handler.
+    ASSERT_TRUE(sender.ioReady());
+    ASSERT_NO_THROW(sender.runReadyIO());
+
+    // Verify that sender shows no IO ready.
+    // and that the queue is empty.
+    ASSERT_FALSE(sender.ioReady());
+    EXPECT_EQ(0, sender.getQueueSize());
+}
+
+/// @brief Tests NameChangeUDPSender basic send  with INADDR_ANY and port 0.
+TEST_F(NameChangeUDPSenderBasicTest, anyAddressSendMultiThreading) {
+    // Enable multi-threading
+    MultiThreadingMgr::instance().setMode(true);
+
+    isc::asiolink::IOAddress ip_address(TEST_ADDRESS);
+    isc::asiolink::IOAddress any_address("0.0.0.0");
+    isc::asiolink::IOService io_service;
+    SimpleSendHandler ncr_handler;
+
+    // Tests are based on a list of messages, get the count now.
+    int num_msgs = sizeof(valid_msgs)/sizeof(char*);
+
+    // Create the sender, setting the queue max equal to the number of
+    // messages we will have in the list.
+    NameChangeUDPSender sender(any_address, 0, ip_address, LISTENER_PORT,
+                               FMT_JSON, ncr_handler, num_msgs);
+
+    // Enter send mode.
+    ASSERT_NO_THROW(sender.startSending(io_service));
+    EXPECT_TRUE(sender.amSending());
+
+    // Create and queue up a message.
+    NameChangeRequestPtr ncr;
+    ASSERT_NO_THROW(ncr = NameChangeRequest::fromJSON(valid_msgs[0]));
+    EXPECT_NO_THROW(sender.sendRequest(ncr));
+    EXPECT_EQ(1, sender.getQueueSize());
+
+    // Verify we have a ready IO, then execute at one ready handler.
+    ASSERT_TRUE(sender.ioReady());
+    ASSERT_NO_THROW(sender.runReadyIO());
+
+    // Verify that sender shows no IO ready.
+    // and that the queue is empty.
+    ASSERT_FALSE(sender.ioReady());
+    EXPECT_EQ(0, sender.getQueueSize());
+}
+
+/// @brief Test the NameChangeSender::assumeQueue method.
+TEST_F(NameChangeUDPSenderBasicTest, assumeQueue) {
+    isc::asiolink::IOAddress ip_address(TEST_ADDRESS);
+    uint32_t port = SENDER_PORT;
+    isc::asiolink::IOService io_service;
+    SimpleSendHandler ncr_handler;
+    NameChangeRequestPtr ncr;
+
+    // Tests are based on a list of messages, get the count now.
+    int num_msgs = sizeof(valid_msgs)/sizeof(char*);
+
+    // Create two senders with queue max equal to the number of
+    // messages we will have in the list.
+    NameChangeUDPSender sender1(ip_address, port, ip_address, port,
+                               FMT_JSON, ncr_handler, num_msgs);
+
+    NameChangeUDPSender sender2(ip_address, port+1, ip_address, port,
+                                FMT_JSON, ncr_handler, num_msgs);
+
+    // Place sender1 into send mode and queue up messages.
+    ASSERT_NO_THROW(sender1.startSending(io_service));
+    for (int i = 0; i < num_msgs; i++) {
+        ASSERT_NO_THROW(ncr = NameChangeRequest::fromJSON(valid_msgs[i]));
+        ASSERT_NO_THROW(sender1.sendRequest(ncr));
+    }
+
+    // Make sure sender1's queue count is as expected.
+    ASSERT_EQ(num_msgs, sender1.getQueueSize());
+
+    // Verify sender1 is sending, sender2 is not.
+    ASSERT_TRUE(sender1.amSending());
+    ASSERT_FALSE(sender2.amSending());
+
+    // Transfer from sender1 to sender2 should fail because
+    // sender1 is in send mode.
+    ASSERT_THROW(sender2.assumeQueue(sender1), NcrSenderError);
+
+    // Take sender1 out of send mode.
+    ASSERT_NO_THROW(sender1.stopSending());
+    ASSERT_FALSE(sender1.amSending());
+    // Stopping should have completed the first message.
+    --num_msgs;
+    EXPECT_EQ(num_msgs, sender1.getQueueSize());
+
+    // Transfer should succeed. Verify sender1 has none,
+    // and sender2 has num_msgs queued.
+    EXPECT_NO_THROW(sender2.assumeQueue(sender1));
+    EXPECT_EQ(0, sender1.getQueueSize());
+    EXPECT_EQ(num_msgs, sender2.getQueueSize());
+
+    // Reduce sender1's max queue size.
+    ASSERT_NO_THROW(sender1.setQueueMaxSize(num_msgs - 1));
+
+    // Transfer should fail as sender1's queue is not large enough.
+    ASSERT_THROW(sender1.assumeQueue(sender2), NcrSenderError);
+
+    // Place sender1 into send mode and queue up a message.
+    ASSERT_NO_THROW(sender1.startSending(io_service));
+    ASSERT_NO_THROW(ncr = NameChangeRequest::fromJSON(valid_msgs[0]));
+    ASSERT_NO_THROW(sender1.sendRequest(ncr));
+
+    // Take sender1 out of send mode.
+    ASSERT_NO_THROW(sender1.stopSending());
+
+    // Try to transfer from sender1 to sender2. This should fail
+    // as sender2's queue is not empty.
+    ASSERT_THROW(sender2.assumeQueue(sender1), NcrSenderError);
+}
+
+/// @brief Test the NameChangeSender::assumeQueue method.
+TEST_F(NameChangeUDPSenderBasicTest, assumeQueueMultiThreading) {
+    // Enable multi-threading
+    MultiThreadingMgr::instance().setMode(true);
+
+    isc::asiolink::IOAddress ip_address(TEST_ADDRESS);
+    uint32_t port = SENDER_PORT;
+    isc::asiolink::IOService io_service;
+    SimpleSendHandler ncr_handler;
+    NameChangeRequestPtr ncr;
+
+    // Tests are based on a list of messages, get the count now.
+    int num_msgs = sizeof(valid_msgs)/sizeof(char*);
+
+    // Create two senders with queue max equal to the number of
+    // messages we will have in the list.
+    NameChangeUDPSender sender1(ip_address, port, ip_address, port,
+                               FMT_JSON, ncr_handler, num_msgs);
+
+    NameChangeUDPSender sender2(ip_address, port+1, ip_address, port,
+                                FMT_JSON, ncr_handler, num_msgs);
+
+    // Place sender1 into send mode and queue up messages.
+    ASSERT_NO_THROW(sender1.startSending(io_service));
+    for (int i = 0; i < num_msgs; i++) {
+        ASSERT_NO_THROW(ncr = NameChangeRequest::fromJSON(valid_msgs[i]));
+        ASSERT_NO_THROW(sender1.sendRequest(ncr));
+    }
+
+    // Make sure sender1's queue count is as expected.
+    ASSERT_EQ(num_msgs, sender1.getQueueSize());
+
+    // Verify sender1 is sending, sender2 is not.
+    ASSERT_TRUE(sender1.amSending());
+    ASSERT_FALSE(sender2.amSending());
+
+    // Transfer from sender1 to sender2 should fail because
+    // sender1 is in send mode.
+    ASSERT_THROW(sender2.assumeQueue(sender1), NcrSenderError);
+
+    // Take sender1 out of send mode.
+    ASSERT_NO_THROW(sender1.stopSending());
+    ASSERT_FALSE(sender1.amSending());
+    // Stopping should have completed the first message.
+    --num_msgs;
+    EXPECT_EQ(num_msgs, sender1.getQueueSize());
+
+    // Transfer should succeed. Verify sender1 has none,
+    // and sender2 has num_msgs queued.
+    EXPECT_NO_THROW(sender2.assumeQueue(sender1));
+    EXPECT_EQ(0, sender1.getQueueSize());
+    EXPECT_EQ(num_msgs, sender2.getQueueSize());
+
+    // Reduce sender1's max queue size.
+    ASSERT_NO_THROW(sender1.setQueueMaxSize(num_msgs - 1));
+
+    // Transfer should fail as sender1's queue is not large enough.
+    ASSERT_THROW(sender1.assumeQueue(sender2), NcrSenderError);
+
+    // Place sender1 into send mode and queue up a message.
+    ASSERT_NO_THROW(sender1.startSending(io_service));
+    ASSERT_NO_THROW(ncr = NameChangeRequest::fromJSON(valid_msgs[0]));
+    ASSERT_NO_THROW(sender1.sendRequest(ncr));
+
+    // Take sender1 out of send mode.
+    ASSERT_NO_THROW(sender1.stopSending());
+
+    // Try to transfer from sender1 to sender2. This should fail
+    // as sender2's queue is not empty.
+    ASSERT_THROW(sender2.assumeQueue(sender1), NcrSenderError);
+}
+
+/// @brief Text fixture that allows testing a listener and sender together
+/// It derives from both the receive and send handler classes and contains
+/// and instance of UDP listener and UDP sender.
+class NameChangeUDPTest : public virtual ::testing::Test,
+                          NameChangeListener::RequestReceiveHandler,
+                          NameChangeSender::RequestSendHandler {
+public:
+    isc::asiolink::IOService io_service_;
+    NameChangeListener::Result recv_result_;
+    NameChangeSender::Result send_result_;
+    NameChangeListenerPtr listener_;
+    NameChangeSenderPtr   sender_;
+    isc::asiolink::IntervalTimer test_timer_;
+
+    std::vector<NameChangeRequestPtr> sent_ncrs_;
+    std::vector<NameChangeRequestPtr> received_ncrs_;
+
+    NameChangeUDPTest()
+        : io_service_(), recv_result_(NameChangeListener::SUCCESS),
+          send_result_(NameChangeSender::SUCCESS), test_timer_(io_service_) {
+        isc::asiolink::IOAddress addr(TEST_ADDRESS);
+        // Create our listener instance. Note that reuse_address is true.
+        listener_.reset(
+            new NameChangeUDPListener(addr, LISTENER_PORT, FMT_JSON,
+                                      *this, true));
+
+        // Create our sender instance. Note that reuse_address is true.
+         sender_.reset(
+             new NameChangeUDPSender(addr, SENDER_PORT, addr, LISTENER_PORT,
+                                     FMT_JSON, *this, 100, true));
+
+        // Set the test timeout to break any running tasks if they hang.
+        test_timer_.setup(std::bind(&NameChangeUDPTest::testTimeoutHandler,
+                                    this),
+                          TEST_TIMEOUT);
+        // Disable multi-threading
+        MultiThreadingMgr::instance().setMode(false);
+    }
+
+    ~NameChangeUDPTest() {
+        // Disable multi-threading
+        MultiThreadingMgr::instance().setMode(false);
+    }
+
+    void reset_results() {
+        sent_ncrs_.clear();
+        received_ncrs_.clear();
+    }
+
+    /// @brief Implements the receive completion handler.
+    virtual void operator ()(const NameChangeListener::Result result,
+                             NameChangeRequestPtr& ncr) {
+        // save the result and the NCR received.
+        recv_result_ = result;
+        received_ncrs_.push_back(ncr);
+    }
+
+    /// @brief Implements the send completion handler.
+    virtual void operator ()(const NameChangeSender::Result result,
+                             NameChangeRequestPtr& ncr) {
+        // save the result and the NCR sent.
+        send_result_ = result;
+        sent_ncrs_.push_back(ncr);
+    }
+
+    /// @brief Handler invoked when test timeout is hit
+    ///
+    /// This callback stops all running (hanging) tasks on IO service.
+    void testTimeoutHandler() {
+        io_service_.stop();
+        FAIL() << "Test timeout hit.";
+    }
+
+    /// @brief checks the received NCR content, ignoring the order if necessary.
+    ///
+    /// The UDP does not provide any guarantees regarding order. While in most cases
+    /// the NCRs are received in the order they're sent, that's not guaranteed. As such,
+    /// the test does the normal ordered check, which will pass in most cases. However,
+    /// we have documented Jenkins history that it sometimes fail. In those cases, we
+    /// need to go through a full check assuming the packets were received not in order.
+    /// If that fails, the test will print detailed information about the failure.
+    ///
+    /// This function returns a status, but it's not really necessary to check it as
+    /// it calls gtest macros to indicate failures.
+    ///
+    /// @param num_msgs number of received and sent messages
+    /// @param sent vector of sent NCRs
+    /// @param rcvd vector of received NCRs
+    /// @return true if all packets were received, false otherwise
+    bool checkUnordered(size_t num_msgs, const std::vector<NameChangeRequestPtr>& sent,
+                      const std::vector<NameChangeRequestPtr>& rcvd) {
+        // Verify that what we sent matches what we received.
+        // WRONG ASSUMPTION HERE: UDP does not guarantee ordered delivery.
+        bool ok = true;
+        for (int i = 0; i < num_msgs; i++) {
+            if (!checkSendVsReceived(sent[i], rcvd[i])) {
+                // Ok, the data was not received in order.
+                ok = false;
+                break;
+            }
+        }
+        if (!ok) {
+            std::cout << "UDP data received not in order! Checking un ordered delivery"
+                      << std::endl;
+            // We need to double iterate through the messages to check every one
+            // against one another.
+            for (int i = 0; i < num_msgs; i++) {
+                ok = false;
+                for (int j = 0; j < num_msgs; j++) {
+                    if (checkSendVsReceived(sent[i], rcvd[j])) {
+                        std::cout << "Found UDP packet " << i << ", received as " << j << "th"
+                                  << std::endl;
+                        ok = true;
+                    }
+                }
+                EXPECT_TRUE(ok) << "failed to find UDP packet " << i << " among total of "
+                                << num_msgs << " messages received";
+            }
+        }
+        return (ok);
+    }
+};
+
+/// @brief Uses a sender and listener to test UDP-based NCR delivery
+/// Conducts a "round-trip" test using a sender to transmit a set of valid
+/// NCRs to a listener.  The test verifies that what was sent matches what
+/// was received both in quantity and in content.
+TEST_F(NameChangeUDPTest, roundTripTest) {
+    // Place the listener into listening state.
+    ASSERT_NO_THROW(listener_->startListening(io_service_));
+    EXPECT_TRUE(listener_->amListening());
+
+    // Get the number of messages in the list of test messages.
+    int num_msgs = sizeof(valid_msgs)/sizeof(char*);
+
+    // Place the sender into sending state.
+    ASSERT_NO_THROW(sender_->startSending(io_service_));
+    EXPECT_TRUE(sender_->amSending());
+
+    for (int i = 0; i < num_msgs; i++) {
+        NameChangeRequestPtr ncr;
+        ASSERT_NO_THROW(ncr = NameChangeRequest::fromJSON(valid_msgs[i]));
+        sender_->sendRequest(ncr);
+        EXPECT_EQ(i+1, sender_->getQueueSize());
+    }
+
+    // Execute callbacks until we have sent and received all of messages.
+    while (sender_->getQueueSize() > 0 || (received_ncrs_.size() < num_msgs)) {
+        EXPECT_NO_THROW(io_service_.run_one());
+    }
+
+    // Send queue should be empty.
+    EXPECT_EQ(0, sender_->getQueueSize());
+
+    // We should have the same number of sends and receives as we do messages.
+    ASSERT_EQ(num_msgs, sent_ncrs_.size());
+    ASSERT_EQ(num_msgs, received_ncrs_.size());
+
+    // Check if the payload was received, ignoring the order if necessary.
+    checkUnordered(num_msgs, sent_ncrs_, received_ncrs_);
+
+    // Verify that we can gracefully stop listening.
+    EXPECT_NO_THROW(listener_->stopListening());
+    EXPECT_FALSE(listener_->amListening());
+
+    // Verify that IO pending is false, after cancel event occurs.
+    EXPECT_NO_THROW(io_service_.run_one());
+    EXPECT_FALSE(listener_->isIoPending());
+
+    // Verify that we can gracefully stop sending.
+    EXPECT_NO_THROW(sender_->stopSending());
+    EXPECT_FALSE(sender_->amSending());
+}
+
+/// @brief Uses a sender and listener to test UDP-based NCR delivery
+/// Conducts a "round-trip" test using a sender to transmit a set of valid
+/// NCRs to a listener.  The test verifies that what was sent matches what
+/// was received both in quantity and in content.
+TEST_F(NameChangeUDPTest, roundTripTestMultiThreading) {
+    // Enable multi-threading
+    MultiThreadingMgr::instance().setMode(true);
+
+    // Place the listener into listening state.
+    ASSERT_NO_THROW(listener_->startListening(io_service_));
+    EXPECT_TRUE(listener_->amListening());
+
+    // Get the number of messages in the list of test messages.
+    int num_msgs = sizeof(valid_msgs)/sizeof(char*);
+
+    // Place the sender into sending state.
+    ASSERT_NO_THROW(sender_->startSending(io_service_));
+    EXPECT_TRUE(sender_->amSending());
+
+    for (int i = 0; i < num_msgs; i++) {
+        NameChangeRequestPtr ncr;
+        ASSERT_NO_THROW(ncr = NameChangeRequest::fromJSON(valid_msgs[i]));
+        sender_->sendRequest(ncr);
+        EXPECT_EQ(i+1, sender_->getQueueSize());
+    }
+
+    // Execute callbacks until we have sent and received all of messages.
+    while (sender_->getQueueSize() > 0 || (received_ncrs_.size() < num_msgs)) {
+        EXPECT_NO_THROW(io_service_.run_one());
+    }
+
+    // Send queue should be empty.
+    EXPECT_EQ(0, sender_->getQueueSize());
+
+    // We should have the same number of sends and receives as we do messages.
+    ASSERT_EQ(num_msgs, sent_ncrs_.size());
+    ASSERT_EQ(num_msgs, received_ncrs_.size());
+
+    // Verify that what we sent matches what we received. Ignore the order
+    // if necessary.
+    checkUnordered(num_msgs, sent_ncrs_, received_ncrs_);
+
+    // Verify that we can gracefully stop listening.
+    EXPECT_NO_THROW(listener_->stopListening());
+    EXPECT_FALSE(listener_->amListening());
+
+    // Verify that IO pending is false, after cancel event occurs.
+    EXPECT_NO_THROW(io_service_.run_one());
+    EXPECT_FALSE(listener_->isIoPending());
+
+    // Verify that we can gracefully stop sending.
+    EXPECT_NO_THROW(sender_->stopSending());
+    EXPECT_FALSE(sender_->amSending());
+}
+
+// Tests error handling of a failure to mark the watch socket ready, when
+// sendRequest() is called.
+TEST_F(NameChangeUDPSenderBasicTest, watchClosedBeforeSendRequest) {
+    isc::asiolink::IOAddress ip_address(TEST_ADDRESS);
+    isc::asiolink::IOService io_service;
+    SimpleSendHandler ncr_handler;
+
+    // Create the sender and put into send mode.
+    NameChangeUDPSender sender(ip_address, 0, ip_address, LISTENER_PORT,
+                               FMT_JSON, ncr_handler, 100, true);
+    ASSERT_NO_THROW(sender.startSending(io_service));
+    ASSERT_TRUE(sender.amSending());
+
+    // Create an NCR.
+    NameChangeRequestPtr ncr;
+    ASSERT_NO_THROW(ncr = NameChangeRequest::fromJSON(valid_msgs[0]));
+
+    // Tamper with the watch socket by closing the select-fd.
+    close(sender.getSelectFd());
+
+    // Send should fail as we interfered by closing the select-fd.
+    ASSERT_THROW(sender.sendRequest(ncr), util::WatchSocketError);
+
+    // Verify we didn't invoke the handler.
+    EXPECT_EQ(0, ncr_handler.pass_count_);
+    EXPECT_EQ(0, ncr_handler.error_count_);
+
+    // Request remains in the queue. Technically it was sent but its
+    // completion handler won't get called.
+    EXPECT_EQ(1, sender.getQueueSize());
+}
+
+// Tests error handling of a failure to mark the watch socket ready, when
+// sendRequest() is called.
+TEST_F(NameChangeUDPSenderBasicTest, watchClosedBeforeSendRequestMultiThreading) {
+    // Enable multi-threading
+    MultiThreadingMgr::instance().setMode(true);
+
+    isc::asiolink::IOAddress ip_address(TEST_ADDRESS);
+    isc::asiolink::IOService io_service;
+    SimpleSendHandler ncr_handler;
+
+    // Create the sender and put into send mode.
+    NameChangeUDPSender sender(ip_address, 0, ip_address, LISTENER_PORT,
+                               FMT_JSON, ncr_handler, 100, true);
+    ASSERT_NO_THROW(sender.startSending(io_service));
+    ASSERT_TRUE(sender.amSending());
+
+    // Create an NCR.
+    NameChangeRequestPtr ncr;
+    ASSERT_NO_THROW(ncr = NameChangeRequest::fromJSON(valid_msgs[0]));
+
+    // Tamper with the watch socket by closing the select-fd.
+    close(sender.getSelectFd());
+
+    // Send should fail as we interfered by closing the select-fd.
+    ASSERT_THROW(sender.sendRequest(ncr), util::WatchSocketError);
+
+    // Verify we didn't invoke the handler.
+    EXPECT_EQ(0, ncr_handler.pass_count_);
+    EXPECT_EQ(0, ncr_handler.error_count_);
+
+    // Request remains in the queue. Technically it was sent but its
+    // completion handler won't get called.
+    EXPECT_EQ(1, sender.getQueueSize());
+}
+
+// Tests error handling of a failure to mark the watch socket ready, when
+// sendNext() is called during completion handling.
+TEST_F(NameChangeUDPSenderBasicTest, watchClosedAfterSendRequest) {
+    isc::asiolink::IOAddress ip_address(TEST_ADDRESS);
+    isc::asiolink::IOService io_service;
+    SimpleSendHandler ncr_handler;
+
+    // Create the sender and put into send mode.
+    NameChangeUDPSender sender(ip_address, 0, ip_address, LISTENER_PORT,
+                               FMT_JSON, ncr_handler, 100, true);
+    ASSERT_NO_THROW(sender.startSending(io_service));
+    ASSERT_TRUE(sender.amSending());
+
+    // Build and queue up 2 messages.  No handlers will get called yet.
+    for (int i = 0; i < 2; i++) {
+        NameChangeRequestPtr ncr;
+        ASSERT_NO_THROW(ncr = NameChangeRequest::fromJSON(valid_msgs[i]));
+        sender.sendRequest(ncr);
+        EXPECT_EQ(i+1, sender.getQueueSize());
+    }
+
+    // Tamper with the watch socket by closing the select-fd.
+    close (sender.getSelectFd());
+
+    // Run one handler. This should execute the send completion handler
+    // after sending the first message.  Doing completion handling, we will
+    // attempt to queue the second message which should fail.
+    ASSERT_NO_THROW(sender.runReadyIO());
+
+    // Verify handler got called twice. First request should have be sent
+    // without error, second call should have failed to send due to watch
+    // socket markReady failure.
+    EXPECT_EQ(1, ncr_handler.pass_count_);
+    EXPECT_EQ(1, ncr_handler.error_count_);
+
+    // The second request should still be in the queue.
+    EXPECT_EQ(1, sender.getQueueSize());
+}
+
+// Tests error handling of a failure to mark the watch socket ready, when
+// sendNext() is called during completion handling.
+TEST_F(NameChangeUDPSenderBasicTest, watchClosedAfterSendRequestMultiThreading) {
+    // Enable multi-threading
+    MultiThreadingMgr::instance().setMode(true);
+
+    isc::asiolink::IOAddress ip_address(TEST_ADDRESS);
+    isc::asiolink::IOService io_service;
+    SimpleSendHandler ncr_handler;
+
+    // Create the sender and put into send mode.
+    NameChangeUDPSender sender(ip_address, 0, ip_address, LISTENER_PORT,
+                               FMT_JSON, ncr_handler, 100, true);
+    ASSERT_NO_THROW(sender.startSending(io_service));
+    ASSERT_TRUE(sender.amSending());
+
+    // Build and queue up 2 messages.  No handlers will get called yet.
+    for (int i = 0; i < 2; i++) {
+        NameChangeRequestPtr ncr;
+        ASSERT_NO_THROW(ncr = NameChangeRequest::fromJSON(valid_msgs[i]));
+        sender.sendRequest(ncr);
+        EXPECT_EQ(i+1, sender.getQueueSize());
+    }
+
+    // Tamper with the watch socket by closing the select-fd.
+    close (sender.getSelectFd());
+
+    // Run one handler. This should execute the send completion handler
+    // after sending the first message.  Doing completion handling, we will
+    // attempt to queue the second message which should fail.
+    ASSERT_NO_THROW(sender.runReadyIO());
+
+    // Verify handler got called twice. First request should have be sent
+    // without error, second call should have failed to send due to watch
+    // socket markReady failure.
+    EXPECT_EQ(1, ncr_handler.pass_count_);
+    EXPECT_EQ(1, ncr_handler.error_count_);
+
+    // The second request should still be in the queue.
+    EXPECT_EQ(1, sender.getQueueSize());
+}
+
+
+// Tests error handling of a failure to clear the watch socket during
+// completion handling.
+TEST_F(NameChangeUDPSenderBasicTest, watchSocketBadRead) {
+    isc::asiolink::IOAddress ip_address(TEST_ADDRESS);
+    isc::asiolink::IOService io_service;
+    SimpleSendHandler ncr_handler;
+
+    // Create the sender and put into send mode.
+    NameChangeUDPSender sender(ip_address, 0, ip_address, LISTENER_PORT,
+                               FMT_JSON, ncr_handler, 100, true);
+    ASSERT_NO_THROW(sender.startSending(io_service));
+    ASSERT_TRUE(sender.amSending());
+
+    // Build and queue up 2 messages.  No handlers will get called yet.
+    for (int i = 0; i < 2; i++) {
+        NameChangeRequestPtr ncr;
+        ASSERT_NO_THROW(ncr = NameChangeRequest::fromJSON(valid_msgs[i]));
+        sender.sendRequest(ncr);
+        EXPECT_EQ(i+1, sender.getQueueSize());
+    }
+
+    // Fetch the sender's select-fd.
+    int select_fd = sender.getSelectFd();
+
+    // Verify that select_fd appears ready.
+    ASSERT_TRUE(selectCheck(select_fd) > 0);
+
+    // Interfere by reading part of the marker from the select-fd.
+    uint32_t buf = 0;
+    ASSERT_EQ((read (select_fd, &buf, 1)), 1);
+    ASSERT_NE(util::WatchSocket::MARKER, buf);
+
+    // Run one handler. This should execute the send completion handler
+    // after sending the message.  Doing completion handling clearing the
+    // watch socket should fail, which will close the socket, but not
+    // result in a throw.
+    ASSERT_NO_THROW(sender.runReadyIO());
+
+    // Verify handler got called twice. First request should have be sent
+    // without error, second call should have failed to send due to watch
+    // socket markReady failure.
+    EXPECT_EQ(1, ncr_handler.pass_count_);
+    EXPECT_EQ(1, ncr_handler.error_count_);
+
+    // The second request should still be in the queue.
+    EXPECT_EQ(1, sender.getQueueSize());
+}
+
+// Tests error handling of a failure to clear the watch socket during
+// completion handling.
+TEST_F(NameChangeUDPSenderBasicTest, watchSocketBadReadMultiThreading) {
+    // Enable multi-threading
+    MultiThreadingMgr::instance().setMode(true);
+
+    isc::asiolink::IOAddress ip_address(TEST_ADDRESS);
+    isc::asiolink::IOService io_service;
+    SimpleSendHandler ncr_handler;
+
+    // Create the sender and put into send mode.
+    NameChangeUDPSender sender(ip_address, 0, ip_address, LISTENER_PORT,
+                               FMT_JSON, ncr_handler, 100, true);
+    ASSERT_NO_THROW(sender.startSending(io_service));
+    ASSERT_TRUE(sender.amSending());
+
+    // Build and queue up 2 messages.  No handlers will get called yet.
+    for (int i = 0; i < 2; i++) {
+        NameChangeRequestPtr ncr;
+        ASSERT_NO_THROW(ncr = NameChangeRequest::fromJSON(valid_msgs[i]));
+        sender.sendRequest(ncr);
+        EXPECT_EQ(i+1, sender.getQueueSize());
+    }
+
+    // Fetch the sender's select-fd.
+    int select_fd = sender.getSelectFd();
+
+    // Verify that select_fd appears ready.
+    ASSERT_TRUE(selectCheck(select_fd) > 0);
+
+    // Interfere by reading part of the marker from the select-fd.
+    uint32_t buf = 0;
+    ASSERT_EQ((read (select_fd, &buf, 1)), 1);
+    ASSERT_NE(util::WatchSocket::MARKER, buf);
+
+    // Run one handler. This should execute the send completion handler
+    // after sending the message.  Doing completion handling clearing the
+    // watch socket should fail, which will close the socket, but not
+    // result in a throw.
+    ASSERT_NO_THROW(sender.runReadyIO());
+
+    // Verify handler got called twice. First request should have be sent
+    // without error, second call should have failed to send due to watch
+    // socket markReady failure.
+    EXPECT_EQ(1, ncr_handler.pass_count_);
+    EXPECT_EQ(1, ncr_handler.error_count_);
+
+    // The second request should still be in the queue.
+    EXPECT_EQ(1, sender.getQueueSize());
+}
+
+} // end of anonymous namespace
diff --git a/src/lib/dhcp_ddns/tests/ncr_unittests.cc b/src/lib/dhcp_ddns/tests/ncr_unittests.cc
new file mode 100644
index 0000000..b17d72b
--- /dev/null
+++ b/src/lib/dhcp_ddns/tests/ncr_unittests.cc
@@ -0,0 +1,743 @@
+// Copyright (C) 2013-2023 Internet Systems Consortium, Inc. ("ISC")
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+#include <config.h>
+
+#include <dhcp_ddns/ncr_io.h>
+#include <dhcp/duid.h>
+#include <dhcp/hwaddr.h>
+#include <util/time_utilities.h>
+
+#include <testutils/gtest_utils.h>
+#include <gtest/gtest.h>
+#include <algorithm>
+
+using namespace std;
+using namespace isc;
+using namespace isc::dhcp_ddns;
+using namespace isc::dhcp;
+
+namespace {
+
+/// @brief Defines a list of valid JSON NameChangeRequest renditions.
+/// They are used as input to test conversion from JSON.
+const char *valid_msgs[] =
+{
+    // Valid Add.
+     "{"
+     " \"change-type\" : 0 , "
+     " \"forward-change\" : true , "
+     " \"reverse-change\" : false , "
+     " \"fqdn\" : \"walah.walah.com\" , "
+     " \"ip-address\" : \"192.168.2.1\" , "
+     " \"dhcid\" : \"010203040A7F8E3D\" , "
+     " \"lease-expires-on\" : \"20130121132405\" , "
+     " \"lease-length\" : 1300, "
+     " \"use-conflict-resolution\": true"
+     "}",
+    // Valid Remove.
+     "{"
+     " \"change-type\" : 1 , "
+     " \"forward-change\" : true , "
+     " \"reverse-change\" : false , "
+     " \"fqdn\" : \"walah.walah.com\" , "
+     " \"ip-address\" : \"192.168.2.1\" , "
+     " \"dhcid\" : \"010203040A7F8E3D\" , "
+     " \"lease-expires-on\" : \"20130121132405\" , "
+     " \"lease-length\" : 1300, "
+     " \"use-conflict-resolution\": true"
+     "}",
+     // Valid Add with IPv6 address
+     "{"
+     " \"change-type\" : 0 , "
+     " \"forward-change\" : true , "
+     " \"reverse-change\" : false , "
+     " \"fqdn\" : \"walah.walah.com\" , "
+     " \"ip-address\" : \"fe80::2acf:e9ff:fe12:e56f\" , "
+     " \"dhcid\" : \"010203040A7F8E3D\" , "
+     " \"lease-expires-on\" : \"20130121132405\" , "
+     " \"lease-length\" : 1300, "
+     " \"use-conflict-resolution\": true"
+     "}",
+    // Missing use-conflict-resolution
+     "{"
+     " \"change-type\" : 0 , "
+     " \"forward-change\" : true , "
+     " \"reverse-change\" : false , "
+     " \"fqdn\" : \"walah.walah.com\" , "
+     " \"ip-address\" : \"192.168.2.1\" , "
+     " \"dhcid\" : \"010203040A7F8E3D\" , "
+     " \"lease-expires-on\" : \"20130121132405\" , "
+     " \"lease-length\" : 1300 "
+     "}"
+};
+
+/// @brief Defines a list of invalid JSON NameChangeRequest renditions.
+/// They are used as input to test conversion from JSON.
+const char *invalid_msgs[] =
+{
+    // Invalid change type.
+     "{"
+     " \"change-type\" : 7 , "
+     " \"forward-change\" : true , "
+     " \"reverse-change\" : false , "
+     " \"fqdn\" : \"walah.walah.com\" , "
+     " \"ip-address\" : \"192.168.2.1\" , "
+     " \"dhcid\" : \"010203040A7F8E3D\" , "
+     " \"lease-expires-on\" : \"20130121132405\" , "
+     " \"lease-length\" : 1300, "
+     " \"use-conflict-resolution\": true"
+     "}",
+    // Invalid forward change.
+     "{"
+     " \"change-type\" : 0 , "
+     " \"forward-change\" : \"bogus\" , "
+     " \"reverse-change\" : false , "
+     " \"fqdn\" : \"walah.walah.com\" , "
+     " \"ip-address\" : \"192.168.2.1\" , "
+     " \"dhcid\" : \"010203040A7F8E3D\" , "
+     " \"lease-expires-on\" : \"20130121132405\" , "
+     " \"lease-length\" : 1300, "
+     " \"use-conflict-resolution\": true"
+     "}",
+    // Invalid reverse change.
+     "{"
+     " \"change-type\" : 0 , "
+     " \"forward-change\" : true , "
+     " \"reverse-change\" : 500 , "
+     " \"fqdn\" : \"walah.walah.com\" , "
+     " \"ip-address\" : \"192.168.2.1\" , "
+     " \"dhcid\" : \"010203040A7F8E3D\" , "
+     " \"lease-expires-on\" : \"20130121132405\" , "
+     " \"lease-length\" : 1300, "
+     " \"use-conflict-resolution\": true"
+     "}",
+    // Forward and reverse change both false.
+     "{"
+     " \"change-type\" : 0 , "
+     " \"forward-change\" : false , "
+     " \"reverse-change\" : false , "
+     " \"fqdn\" : \"walah.walah.com\" , "
+     " \"ip-address\" : \"192.168.2.1\" , "
+     " \"dhcid\" : \"010203040A7F8E3D\" , "
+     " \"lease-expires-on\" : \"20130121132405\" , "
+     " \"lease-length\" : 1300, "
+     " \"use-conflict-resolution\": true"
+     "}",
+    // Blank FQDN
+     "{"
+     " \"change-type\" : 0 , "
+     " \"forward-change\" : true , "
+     " \"reverse-change\" : false , "
+     " \"fqdn\" : \"\" , "
+     " \"ip-address\" : \"192.168.2.1\" , "
+     " \"dhcid\" : \"010203040A7F8E3D\" , "
+     " \"lease-expires-on\" : \"20130121132405\" , "
+     " \"lease-length\" : 1300, "
+     " \"use-conflict-resolution\": true"
+     "}",
+    // Malformed FQDN
+     "{"
+     " \"change-type\" : 0 , "
+     " \"forward-change\" : true , "
+     " \"reverse-change\" : false , "
+     " \"fqdn\" : \".bad_name\" , "
+     " \"ip-address\" : \"192.168.2.1\" , "
+     " \"dhcid\" : \"010203040A7F8E3D\" , "
+     " \"lease-expires-on\" : \"20130121132405\" , "
+     " \"lease-length\" : 1300, "
+     " \"use-conflict-resolution\": true"
+     "}",
+    // Bad IP address
+     "{"
+     " \"change-type\" : 0 , "
+     " \"forward-change\" : true , "
+     " \"reverse-change\" : false , "
+     " \"fqdn\" : \"walah.walah.com\" , "
+     " \"ip-address\" : \"xxxxxx\" , "
+     " \"dhcid\" : \"010203040A7F8E3D\" , "
+     " \"lease-expires-on\" : \"20130121132405\" , "
+     " \"lease-length\" : 1300 "
+     " \"use-conflict-resolution\": true"
+     "}",
+    // Blank DHCID
+     "{"
+     " \"change-type\" : 0 , "
+     " \"forward-change\" : true , "
+     " \"reverse-change\" : false , "
+     " \"fqdn\" : \"walah.walah.com\" , "
+     " \"ip-address\" : \"192.168.2.1\" , "
+     " \"dhcid\" : \"\" , "
+     " \"lease-expires-on\" : \"20130121132405\" , "
+     " \"lease-length\" : 1300, "
+     " \"use-conflict-resolution\": true"
+     "}",
+    // Odd number of digits in DHCID
+     "{"
+     " \"change-type\" : 0 , "
+     " \"forward-change\" : true , "
+     " \"reverse-change\" : false , "
+     " \"fqdn\" : \"walah.walah.com\" , "
+     " \"ip-address\" : \"192.168.2.1\" , "
+     " \"dhcid\" : \"010203040A7F8E3\" , "
+     " \"lease-expires-on\" : \"20130121132405\" , "
+     " \"lease-length\" : 1300, "
+     " \"use-conflict-resolution\": true"
+     "}",
+    // Text in DHCID
+     "{"
+     " \"change-type\" : 0 , "
+     " \"forward-change\" : true , "
+     " \"reverse-change\" : false , "
+     " \"fqdn\" : \"walah.walah.com\" , "
+     " \"ip-address\" : \"192.168.2.1\" , "
+     " \"dhcid\" : \"THIS IS BOGUS!!!\" , "
+     " \"lease-expires-on\" : \"20130121132405\" , "
+     " \"lease-length\" : 1300, "
+     " \"use-conflict-resolution\": true"
+     "}",
+    // Invalid lease expiration string
+     "{"
+     " \"change-type\" : 0 , "
+     " \"forward-change\" : true , "
+     " \"reverse-change\" : false , "
+     " \"fqdn\" : \"walah.walah.com\" , "
+     " \"ip-address\" : \"192.168.2.1\" , "
+     " \"dhcid\" : \"010203040A7F8E3D\" , "
+     " \"lease-expires-on\" : \"Wed Jun 26 13:46:46 EDT 2013\" , "
+     " \"lease-length\" : 1300, "
+     " \"use-conflict-resolution\": true"
+     "}",
+    // Non-integer for lease length.
+     "{"
+     " \"change-type\" : 0 , "
+     " \"forward-change\" : true , "
+     " \"reverse-change\" : false , "
+     " \"fqdn\" : \"walah.walah.com\" , "
+     " \"ip-address\" : \"192.168.2.1\" , "
+     " \"dhcid\" : \"010203040A7F8E3D\" , "
+     " \"lease-expires-on\" : \"20130121132405\" , "
+     " \"lease-length\" : \"BOGUS\", "
+     " \"use-conflict-resolution\": true"
+     "}",
+    // Invalid use-conflict-resolution
+     "{"
+     " \"change-type\" : 0 , "
+     " \"forward-change\" : true , "
+     " \"reverse-change\" : false , "
+     " \"fqdn\" : \"walah.walah.com\" , "
+     " \"ip-address\" : \"192.168.2.1\" , "
+     " \"dhcid\" : \"010203040A7F8E3D\" , "
+     " \"lease-expires-on\" : \"20130121132405\" , "
+     " \"lease-length\" : 1300, "
+     " \"use-conflict-resolution\": 777"
+     "}"
+};
+
+/// @brief Tests the NameChangeRequest constructors.
+/// This test verifies that:
+/// 1. Default constructor works.
+/// 2. "Full" constructor, when given valid parameter values, works.
+/// 3. "Full" constructor, given a blank FQDN fails
+/// 4. "Full" constructor, given an invalid IP Address FQDN fails
+/// 5. "Full" constructor, given a blank DHCID fails
+/// 6. "Full" constructor, given false for both forward and reverse fails
+TEST(NameChangeRequestTest, constructionTests) {
+    // Verify the default constructor works.
+    NameChangeRequestPtr ncr;
+    EXPECT_NO_THROW(ncr.reset(new NameChangeRequest()));
+    EXPECT_TRUE(ncr);
+
+    // Verify that full constructor works.
+    uint64_t expiry = isc::util::detail::gettimeWrapper();
+    D2Dhcid dhcid("010203040A7F8E3D");
+
+    EXPECT_NO_THROW(ncr.reset(new NameChangeRequest(
+                    CHG_ADD, true, true, "walah.walah.com",
+                    "192.168.1.101", dhcid, expiry, 1300)));
+    EXPECT_TRUE(ncr);
+    ncr.reset();
+
+    // Verify blank FQDN is detected.
+    EXPECT_THROW(NameChangeRequest(CHG_ADD, true, true, "",
+                 "192.168.1.101", dhcid, expiry, 1300), NcrMessageError);
+
+    // Verify that an invalid IP address is detected.
+    EXPECT_THROW(NameChangeRequest(CHG_ADD, true, true, "valid.fqdn",
+                 "xxx.168.1.101", dhcid, expiry, 1300), NcrMessageError);
+
+    // Verify that a blank DHCID is detected.
+    D2Dhcid blank_dhcid;
+    EXPECT_THROW(NameChangeRequest(CHG_ADD, true, true, "walah.walah.com",
+                 "192.168.1.101", blank_dhcid, expiry, 1300), NcrMessageError);
+
+    // Verify that one or both of direction flags must be true.
+    EXPECT_THROW(NameChangeRequest(CHG_ADD, false, false, "valid.fqdn",
+                "192.168.1.101", dhcid, expiry, 1300), NcrMessageError);
+
+}
+
+/// @brief Tests the basic workings of D2Dhcid to and from string conversions.
+/// It verifies that:
+/// 1. DHCID input strings must contain an even number of characters
+/// 2. DHCID input strings must contain only hexadecimal character digits
+/// 3. A valid DHCID string converts correctly.
+/// 4. Converting a D2Dhcid to a string works correctly.
+/// 5. Equality, inequality, and less-than-equal operators work.
+TEST(NameChangeRequestTest, dhcidTest) {
+    D2Dhcid dhcid;
+
+    // Odd number of digits should be rejected.
+    std::string test_str = "010203040A7F8E3";
+    EXPECT_THROW(dhcid.fromStr(test_str), NcrMessageError);
+
+    // Non digit content should be rejected.
+    test_str = "0102BOGUSA7F8E3D";
+    EXPECT_THROW(dhcid.fromStr(test_str), NcrMessageError);
+
+    // Verify that valid input converts into a proper byte array.
+    test_str = "010203040A7F8E3D";
+    ASSERT_NO_THROW(dhcid.fromStr(test_str));
+
+    // Create a test vector of expected byte contents.
+    const uint8_t bytes[] = { 0x1, 0x2, 0x3, 0x4, 0xA, 0x7F, 0x8E, 0x3D };
+    std::vector<uint8_t> expected_bytes(bytes, bytes + sizeof(bytes));
+
+    // Fetch the byte vector from the dhcid and verify if equals the expected
+    // content.
+    const std::vector<uint8_t>& converted_bytes = dhcid.getBytes();
+    EXPECT_EQ(expected_bytes.size(), converted_bytes.size());
+    EXPECT_TRUE (std::equal(expected_bytes.begin(),
+                            expected_bytes.begin()+expected_bytes.size(),
+                            converted_bytes.begin()));
+
+    // Convert the new dhcid back to string and verify it matches the original
+    // DHCID input string.
+    std::string next_str = dhcid.toStr();
+    EXPECT_EQ(test_str, next_str);
+
+    // Test equality, inequality, and less-than-equal operators
+    test_str="AABBCCDD";
+    EXPECT_NO_THROW(dhcid.fromStr(test_str));
+
+    D2Dhcid other_dhcid;
+    EXPECT_NO_THROW(other_dhcid.fromStr(test_str));
+
+    EXPECT_TRUE(dhcid == other_dhcid);
+    EXPECT_FALSE(dhcid != other_dhcid);
+
+    EXPECT_NO_THROW(other_dhcid.fromStr("BBCCDDEE"));
+    EXPECT_TRUE(dhcid < other_dhcid);
+
+}
+
+/// @brief Test fixture class for testing DHCID creation.
+class DhcidTest : public ::testing::Test {
+public:
+    /// @brief Constructor
+    DhcidTest() {
+        // 0x000000066d79686f7374076578616d706c6503636f6d00
+        const uint8_t fqdn_data[] = {
+            6, 109, 121, 104, 111, 115, 116,     // myhost.
+            7, 101, 120, 97, 109, 112, 108, 101, // example.
+            3, 99, 111, 109, 0                   // com.
+        };
+        wire_fqdn_.assign(fqdn_data, fqdn_data + sizeof(fqdn_data));
+    }
+
+    /// @brief Destructor
+    virtual ~DhcidTest() {
+    }
+
+    std::vector<uint8_t> wire_fqdn_;
+};
+
+/// Tests that DHCID is correctly created from a DUID and FQDN. The final format
+/// of the DHCID is as follows:
+/// <identifier-type> <digest-type-code> <digest>
+/// where:
+/// - identifier-type (2 octets) is 0x0002.
+/// - digest-type-code (1 octet) indicates SHA-256 hashing and is equal 0x1.
+/// - digest = SHA-256(<DUID> <FQDN>)
+/// Note: FQDN is given in the on-wire canonical format.
+TEST_F(DhcidTest, fromDUID) {
+    D2Dhcid dhcid;
+
+    // Create DUID.
+    uint8_t duid_data[] = { 0, 1, 2, 3, 4, 5, 6 };
+    DUID duid(duid_data, sizeof(duid_data));
+
+    // Create DHCID.
+    ASSERT_NO_THROW(dhcid.fromDUID(duid, wire_fqdn_));
+
+    // The reference DHCID (represented as string of hexadecimal digits)
+    // has been calculated using one of the online calculators.
+    std::string dhcid_ref = "0002012191B7B21AF97E0E656DF887C5E2D"
+        "EF30E7758A207EDF4CCB2DE8CA37066021C";
+
+    // Make sure that the DHCID is valid.
+    EXPECT_EQ(dhcid_ref, dhcid.toStr());
+}
+
+// Test that DHCID is correctly created when the DUID has minimal length (1).
+TEST_F(DhcidTest, fromMinDUID) {
+    D2Dhcid dhcid;
+
+    // Create DUID.
+    std::vector<uint8_t> duid_data(DUID::MIN_DUID_LEN, 1);
+    DUID duid(duid_data.data(), duid_data.size());
+
+    // Create DHCID.
+    ASSERT_NO_THROW(dhcid.fromDUID(duid, wire_fqdn_));
+
+    // The reference DHCID (represented as string of hexadecimal digits)
+    // has been calculated using one of the online calculators.
+    std::string dhcid_ref = "000201202F813E7D9C88BADA41250F2A662"
+        "97742BB9B3EB37C0981D4A905745A30BDD3";
+
+    // Make sure that the DHCID is valid.
+    EXPECT_EQ(dhcid_ref, dhcid.toStr());
+}
+
+// Test that DHCID is correctly created when the DUID has maximal length (128).
+TEST_F(DhcidTest, fromMaxDUID) {
+    D2Dhcid dhcid;
+
+    // Create DUID.
+    std::vector<uint8_t> duid_data(DUID::MAX_DUID_LEN, 1);
+    DUID duid(&duid_data[0], duid_data.size());
+
+    // Create DHCID.
+    ASSERT_NO_THROW(dhcid.fromDUID(duid, wire_fqdn_));
+
+    // The reference DHCID (represented as string of hexadecimal digits)
+    // has been calculated using one of the online calculators.
+    std::string dhcid_ref = "0002015B9022851B4015AD78187BB9BDB98"
+        "7708C5EEA74140B28095ED36FE1EAFEE3F6";
+
+    // Make sure that the DHCID is valid.
+    EXPECT_EQ(dhcid_ref, dhcid.toStr());
+}
+
+// This test verifies that DHCID is properly computed from a buffer holding
+// client identifier data.
+TEST_F(DhcidTest, fromClientId) {
+    D2Dhcid dhcid;
+
+    // Create a buffer holding client id..
+    uint8_t clientid_data[] = { 0, 1, 2, 3, 4, 5, 6 };
+    std::vector<uint8_t> clientid(clientid_data,
+                                  clientid_data + sizeof(clientid_data));
+
+    // Create DHCID.
+    ASSERT_NO_THROW(dhcid.fromClientId(clientid, wire_fqdn_));
+
+    // The reference DHCID (represented as string of hexadecimal digits)
+    // has been calculated using one of the online calculators.
+    std::string dhcid_ref = "0001012191B7B21AF97E0E656DF887C5E2D"
+        "EF30E7758A207EDF4CCB2DE8CA37066021C";
+
+    // Make sure that the DHCID is valid.
+    EXPECT_EQ(dhcid_ref, dhcid.toStr());
+
+    // Make sure that the empty FQDN is not accepted.
+    std::vector<uint8_t> empty_wire_fqdn;
+    EXPECT_THROW(dhcid.fromClientId(clientid, empty_wire_fqdn),
+                 isc::dhcp_ddns::DhcidRdataComputeError);
+
+    // Make sure that the empty client identifier is not accepted.
+    clientid.clear();
+    EXPECT_THROW(dhcid.fromClientId(clientid, wire_fqdn_),
+                 isc::dhcp_ddns::DhcidRdataComputeError);
+
+
+}
+
+// This test verifies that DHCID is properly computed from a buffer holding
+// client identifier data that contains a DUID.
+TEST_F(DhcidTest, fromClientIdDUID) {
+    D2Dhcid dhcid;
+
+    // Create a buffer holding client id..
+    uint8_t clientid_data[] = { 0xff, 0x5d, 0xe2, 0x6c, 0x15, 0x00, 0x02,
+        0x00, 0x00, 0xab, 0x11, 0x9a, 0x57, 0x20, 0x95, 0x71, 0x61, 0xbd, 0xd0 };
+    std::vector<uint8_t> clientid(clientid_data,
+                                  clientid_data + sizeof(clientid_data));
+
+    // Create DHCID.
+    ASSERT_NO_THROW(dhcid.fromClientId(clientid, wire_fqdn_));
+
+    // The reference DHCID (represented as string of hexadecimal digits)
+    std::string dhcid_ref = "000201A250D060B9352AE68E5014B78D25"
+        "1C30EFB0D5F64E48303B2BC56E6938F129E7";
+
+    // Make sure that the DHCID is valid.
+    EXPECT_EQ(dhcid_ref, dhcid.toStr());
+
+    // Make sure that a too long client identifier is not accepted.
+    clientid.resize(136);
+    EXPECT_THROW_MSG(dhcid.fromClientId(clientid, wire_fqdn_),
+                     isc::dhcp_ddns::DhcidRdataComputeError,
+                     "unable to compute DHCID from client identifier,"
+                     " embedded DUID length of: 136, is too long");
+
+    // Make sure that a too short client identifier is not accepted.
+    clientid.resize(5);
+    EXPECT_THROW_MSG(dhcid.fromClientId(clientid, wire_fqdn_),
+                     isc::dhcp_ddns::DhcidRdataComputeError,
+                     "unable to compute DHCID from client identifier,"
+                     " embedded DUID length of: 5, is too short");
+
+    // Make sure an empty client identifier is not accepted.
+    clientid.clear();
+    EXPECT_THROW_MSG(dhcid.fromClientId(clientid, wire_fqdn_),
+                     isc::dhcp_ddns::DhcidRdataComputeError,
+                     "empty DUID used to create DHCID");
+}
+
+// This test verifies that DHCID is properly computed from a HW address.
+TEST_F(DhcidTest, fromHWAddr) {
+    D2Dhcid dhcid;
+
+    // Create a buffer holding client id..
+    uint8_t hwaddr_data[] = { 0, 1, 2, 3, 4, 5, 6 };
+    HWAddrPtr hwaddr(new HWAddr(hwaddr_data, sizeof(hwaddr_data),
+                                HTYPE_ETHER));
+
+    // Create DHCID.
+    ASSERT_NO_THROW(dhcid.fromHWAddr(hwaddr, wire_fqdn_));
+
+    // The reference DHCID (represented as string of hexadecimal digits)
+    // has been calculated using one of the online calculators.
+    std::string dhcid_ref = "0000012247F6DC4423C3E8627434A9D686860"
+        "9D88948F78018B215EDCAA30C0C135035";
+
+    // Make sure that the DHCID is valid.
+    EXPECT_EQ(dhcid_ref, dhcid.toStr());
+
+    // Make sure that the empty FQDN is not accepted.
+    std::vector<uint8_t> empty_wire_fqdn;
+    EXPECT_THROW(dhcid.fromHWAddr(hwaddr, empty_wire_fqdn),
+                 isc::dhcp_ddns::DhcidRdataComputeError);
+
+    // Make sure that the NULL HW address is not accepted.
+    hwaddr.reset();
+    EXPECT_THROW(dhcid.fromHWAddr(hwaddr, wire_fqdn_),
+                 isc::dhcp_ddns::DhcidRdataComputeError);
+}
+
+// test operator<< on D2Dhcid
+TEST(NameChangeRequestTest, leftShiftOperation) {
+    const D2Dhcid dhcid("010203040A7F8E3D");
+
+    ostringstream oss;
+    oss << dhcid;
+    EXPECT_EQ(dhcid.toStr(), oss.str());
+}
+
+/// @brief Verifies the fundamentals of converting from and to JSON.
+/// It verifies that:
+/// 1. A NameChangeRequest can be created from a valid JSON string.
+/// 2. A valid JSON string can be created from a NameChangeRequest
+TEST(NameChangeRequestTest, basicJsonTest) {
+    // Define valid JSON rendition of a request.
+    std::string msg_str = "{"
+                            "\"change-type\":1,"
+                            "\"forward-change\":true,"
+                            "\"reverse-change\":false,"
+                            "\"fqdn\":\"walah.walah.com.\","
+                            "\"ip-address\":\"192.168.2.1\","
+                            "\"dhcid\":\"010203040A7F8E3D\","
+                            "\"lease-expires-on\":\"20130121132405\","
+                            "\"lease-length\":1300,"
+                            "\"use-conflict-resolution\":true"
+                          "}";
+
+    // Verify that a NameChangeRequests can be instantiated from the
+    // a valid JSON rendition.
+    NameChangeRequestPtr ncr;
+    ASSERT_NO_THROW_LOG(ncr  = NameChangeRequest::fromJSON(msg_str));
+    ASSERT_TRUE(ncr);
+
+    // Verify that the JSON string created by the new request equals the
+    // original input string.
+    std::string json_str = ncr->toJSON();
+    EXPECT_EQ(msg_str, json_str);
+
+    // Verify that the request ID matches the string from the DHCID.
+    std::string dhcid_str = "010203040A7F8E3D";
+    EXPECT_EQ(dhcid_str, ncr->getRequestId());
+}
+
+/// @brief Tests a variety of invalid JSON message strings.
+/// This test iterates over a list of JSON messages, each containing a single
+/// content error. The list of messages is defined by the global array,
+/// invalid_messages. Currently that list contains the following invalid
+/// conditions:
+///  1. Invalid change type
+///  2. Invalid forward change
+///  3. Invalid reverse change
+///  4. Forward and reverse change both false
+///  5. Invalid forward change
+///  6. Blank FQDN
+///  7. Bad IP address
+///  8. Blank DHCID
+///  9. Odd number of digits in DHCID
+/// 10. Text in DHCID
+/// 11. Invalid lease expiration string
+/// 12. Non-integer for lease length.
+/// If more permutations arise they can easily be added to the list.
+TEST(NameChangeRequestTest, invalidMsgChecks) {
+    // Iterate over the list of JSON strings, attempting to create a
+    // NameChangeRequest. The attempt should throw a NcrMessageError.
+    int num_msgs = sizeof(invalid_msgs)/sizeof(char*);
+    for (int i = 0; i < num_msgs; i++) {
+        EXPECT_THROW(NameChangeRequest::fromJSON(invalid_msgs[i]),
+                     NcrMessageError) << "Invalid message not caught idx: "
+                     << i << std::endl << " text:[" << invalid_msgs[i] << "]"
+                     << std::endl;
+    }
+}
+
+/// @brief Tests a variety of valid JSON message strings.
+/// This test iterates over a list of JSON messages, each containing a single
+/// valid request rendition. The list of messages is defined by the global
+/// array, valid_messages. Currently that list contains the following valid
+/// messages:
+///  1. Valid, IPv4 Add
+///  2. Valid, IPv4 Remove
+///  3. Valid, IPv6 Add
+/// If more permutations arise they can easily be added to the list.
+TEST(NameChangeRequestTest, validMsgChecks) {
+    // Iterate over the list of JSON strings, attempting to create a
+    // NameChangeRequest. The attempt should succeed.
+    int num_msgs = sizeof(valid_msgs)/sizeof(char*);
+    for (int i = 0; i < num_msgs; i++) {
+        EXPECT_NO_THROW(NameChangeRequest::fromJSON(valid_msgs[i]))
+                        << "Valid message failed,  message idx: " << i
+                        << std::endl << " text:[" << valid_msgs[i] << "]"
+                        << std::endl;
+    }
+}
+
+/// @brief Tests converting to and from JSON via isc::util buffer classes.
+/// This test verifies that:
+/// 1. A NameChangeRequest can be rendered in JSON written to an OutputBuffer
+/// 2. A InputBuffer containing a valid JSON request rendition can be used
+/// to create a NameChangeRequest.
+TEST(NameChangeRequestTest, toFromBufferTest) {
+    // Define a string containing a valid JSON NameChangeRequest rendition.
+    std::string msg_str = "{"
+                            "\"change-type\":1,"
+                            "\"forward-change\":true,"
+                            "\"reverse-change\":false,"
+                            "\"fqdn\":\"walah.walah.com.\","
+                            "\"ip-address\":\"192.168.2.1\","
+                            "\"dhcid\":\"010203040A7F8E3D\","
+                            "\"lease-expires-on\":\"20130121132405\","
+                            "\"lease-length\":1300,"
+                            "\"use-conflict-resolution\":true"
+                          "}";
+
+    // Create a request from JSON directly.
+    NameChangeRequestPtr ncr;
+    ASSERT_NO_THROW(ncr = NameChangeRequest::fromJSON(msg_str));
+
+    // Verify that we output the request as JSON text to a buffer
+    // without error.
+    isc::util::OutputBuffer output_buffer(1024);
+    ASSERT_NO_THROW(ncr->toFormat(FMT_JSON, output_buffer));
+
+    // Make an InputBuffer from the OutputBuffer.
+    isc::util::InputBuffer input_buffer(output_buffer.getData(),
+                                        output_buffer.getLength());
+
+    // Verify that we can create a new request from the InputBuffer.
+    NameChangeRequestPtr ncr2;
+    ASSERT_NO_THROW(ncr2 =
+                    NameChangeRequest::fromFormat(FMT_JSON, input_buffer));
+
+    // Convert the new request to JSON directly.
+    std::string final_str = ncr2->toJSON();
+
+    // Verify that the final string matches the original.
+    ASSERT_EQ(final_str, msg_str);
+}
+
+/// @brief Tests ip address modification and validation
+TEST(NameChangeRequestTest, ipAddresses) {
+    NameChangeRequest ncr;
+
+    // Verify that a valid IPv4 address works.
+    ASSERT_NO_THROW(ncr.setIpAddress("192.168.1.1"));
+    const asiolink::IOAddress& io_addr4 = ncr.getIpIoAddress();
+    EXPECT_EQ(ncr.getIpAddress(), io_addr4.toText());
+    EXPECT_TRUE(ncr.isV4());
+    EXPECT_FALSE(ncr.isV6());
+
+    // Verify that a valid IPv6 address works.
+    ASSERT_NO_THROW(ncr.setIpAddress("2001:1::f3"));
+    const asiolink::IOAddress& io_addr6 = ncr.getIpIoAddress();
+    EXPECT_EQ(ncr.getIpAddress(), io_addr6.toText());
+    EXPECT_FALSE(ncr.isV4());
+    EXPECT_TRUE(ncr.isV6());
+
+    // Verify that an invalid address fails.
+    ASSERT_THROW(ncr.setIpAddress("x001:1::f3"),NcrMessageError);
+}
+
+/// @brief Tests conversion of NameChangeFormat between enum and strings.
+TEST(NameChangeFormatTest, formatEnumConversion){
+    ASSERT_EQ(stringToNcrFormat("JSON"), dhcp_ddns::FMT_JSON);
+    ASSERT_EQ(stringToNcrFormat("jSoN"), dhcp_ddns::FMT_JSON);
+    ASSERT_THROW(stringToNcrFormat("bogus"), isc::BadValue);
+
+    ASSERT_EQ(ncrFormatToString(dhcp_ddns::FMT_JSON), "JSON");
+}
+
+/// @brief Tests conversion of NameChangeProtocol between enum and strings.
+TEST(NameChangeProtocolTest, protocolEnumConversion){
+    ASSERT_EQ(stringToNcrProtocol("UDP"), dhcp_ddns::NCR_UDP);
+    ASSERT_EQ(stringToNcrProtocol("udP"), dhcp_ddns::NCR_UDP);
+    ASSERT_EQ(stringToNcrProtocol("TCP"), dhcp_ddns::NCR_TCP);
+    ASSERT_EQ(stringToNcrProtocol("Tcp"), dhcp_ddns::NCR_TCP);
+    ASSERT_THROW(stringToNcrProtocol("bogus"), isc::BadValue);
+
+    ASSERT_EQ(ncrProtocolToString(dhcp_ddns::NCR_UDP), "UDP");
+    ASSERT_EQ(ncrProtocolToString(dhcp_ddns::NCR_TCP), "TCP");
+}
+
+TEST(NameChangeRequestTest, useConflictResolutionParsing) {
+    std::string base_json =
+     "{"
+     " \"change-type\" : 0 , "
+     " \"forward-change\" : true , "
+     " \"reverse-change\" : false , "
+     " \"fqdn\" : \"walah.walah.com\" , "
+     " \"ip-address\" : \"192.168.2.1\" , "
+     " \"dhcid\" : \"010203040A7F8E3D\" , "
+     " \"lease-expires-on\" : \"20130121132405\" , "
+     " \"lease-length\" : 1300 ";
+
+    std::string its_true(base_json + ",\"use-conflict-resolution\": true}");
+    NameChangeRequestPtr ncr;
+    ASSERT_NO_THROW_LOG(ncr = NameChangeRequest::fromJSON(its_true));
+    ASSERT_TRUE(ncr);
+    EXPECT_TRUE(ncr->useConflictResolution());
+
+    std::string its_false(base_json + ",\"use-conflict-resolution\": false}");
+    ASSERT_NO_THROW_LOG(ncr = NameChangeRequest::fromJSON(its_false));
+    ASSERT_TRUE(ncr);
+    EXPECT_FALSE(ncr->useConflictResolution());
+
+    std::string its_missing(base_json + "}");
+    ASSERT_NO_THROW_LOG(ncr = NameChangeRequest::fromJSON(its_true));
+    ASSERT_TRUE(ncr);
+    EXPECT_TRUE(ncr->useConflictResolution());
+}
+
+} // end of anonymous namespace
+
diff --git a/src/lib/dhcp_ddns/tests/run_unittests.cc b/src/lib/dhcp_ddns/tests/run_unittests.cc
new file mode 100644
index 0000000..e1c0801
--- /dev/null
+++ b/src/lib/dhcp_ddns/tests/run_unittests.cc
@@ -0,0 +1,21 @@
+// Copyright (C) 2011-2015 Internet Systems Consortium, Inc. ("ISC")
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+#include <config.h>
+
+#include <log/logger_support.h>
+
+#include <gtest/gtest.h>
+
+int
+main(int argc, char* argv[]) {
+    ::testing::InitGoogleTest(&argc, argv);
+    isc::log::initLogger();
+
+    int result = RUN_ALL_TESTS();
+
+    return (result);
+}
diff --git a/src/lib/dhcp_ddns/tests/test_utils.cc b/src/lib/dhcp_ddns/tests/test_utils.cc
new file mode 100644
index 0000000..0671307
--- /dev/null
+++ b/src/lib/dhcp_ddns/tests/test_utils.cc
@@ -0,0 +1,37 @@
+// Copyright (C) 2014-2015 Internet Systems Consortium, Inc. ("ISC")
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+#include <config.h>
+
+#include <gtest/gtest.h>
+
+#include <sys/select.h>
+#include <sys/ioctl.h>
+
+using namespace std;
+
+namespace isc {
+namespace dhcp_ddns {
+
+int selectCheck(int fd_to_check) {
+    fd_set read_fds;
+    int maxfd = 0;
+
+    FD_ZERO(&read_fds);
+
+    // Add this socket to listening set
+    FD_SET(fd_to_check,  &read_fds);
+    maxfd = fd_to_check;
+
+    struct timeval select_timeout;
+    select_timeout.tv_sec = 0;
+    select_timeout.tv_usec = 0;
+
+    return (select(maxfd + 1, &read_fds, NULL, NULL, &select_timeout));
+}
+
+}; // namespace isc::d2
+}; // namespace isc
diff --git a/src/lib/dhcp_ddns/tests/test_utils.h b/src/lib/dhcp_ddns/tests/test_utils.h
new file mode 100644
index 0000000..256350e
--- /dev/null
+++ b/src/lib/dhcp_ddns/tests/test_utils.h
@@ -0,0 +1,29 @@
+// Copyright (C) 2014-2015 Internet Systems Consortium, Inc. ("ISC")
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+#ifndef TEST_UTILS_H
+#define TEST_UTILS_H
+
+/// @file test_utils.h Common dhcp_ddns testing elements
+
+#include <gtest/gtest.h>
+
+
+namespace isc {
+namespace dhcp_ddns {
+
+/// @brief Returns the result of select() given an fd to check for read status.
+///
+/// @param fd_to_check The file descriptor to test
+///
+/// @return Returns less than one on an error, 0 if the fd is not ready to
+/// read, > 0 if it is ready to read. 
+int selectCheck(int fd_to_check);
+
+}; // namespace isc::dhcp_ddns;
+}; // namespace isc;
+
+#endif
author	Daniel Baumann <daniel.baumann@progress-linux.org>	2024-04-13 12:15:43 +0000
committer	Daniel Baumann <daniel.baumann@progress-linux.org>	2024-04-13 12:15:43 +0000
commit	f5f56e1a1c4d9e9496fcb9d81131066a964ccd23 (patch)
tree	49e44c6f87febed37efb953ab5485aa49f6481a7 /src/lib/dhcp_ddns/tests
parent	Initial commit. (diff)
download	isc-kea-f5f56e1a1c4d9e9496fcb9d81131066a964ccd23.tar.xz isc-kea-f5f56e1a1c4d9e9496fcb9d81131066a964ccd23.zip