8 files changed, 2577 insertions, 0 deletions

diff --git a/src/hooks/dhcp/pgsql_cb/tests/Makefile.am b/src/hooks/dhcp/pgsql_cb/tests/Makefile.am
new file mode 100644
index 0000000..f285cfd
--- /dev/null
+++ b/src/hooks/dhcp/pgsql_cb/tests/Makefile.am
@@ -0,0 +1,64 @@
+SUBDIRS = .
+
+AM_CPPFLAGS = -I$(top_builddir)/src/lib -I$(top_srcdir)/src/lib
+AM_CPPFLAGS += -I$(top_builddir)/src/hooks/dhcp/pgsql_cb -I$(top_srcdir)/src/hooks/dhcp/pgsql_cb
+AM_CPPFLAGS += $(BOOST_INCLUDES) $(PGSQL_CPPFLAGS)
+AM_CPPFLAGS += -DINSTALL_PROG=\"$(abs_top_srcdir)/install-sh\"
+
+AM_CXXFLAGS = $(KEA_CXXFLAGS)
+
+if USE_STATIC_LINK
+AM_LDFLAGS = -static
+endif
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+
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+
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+
+TESTS =
+if HAVE_GTEST
+TESTS += pgsql_cb_unittests
+
+pgsql_cb_unittests_SOURCES  = pgsql_cb_impl_unittest.cc
+pgsql_cb_unittests_SOURCES  += pgsql_cb_dhcp4_unittest.cc
+pgsql_cb_unittests_SOURCES += pgsql_cb_dhcp4_mgr_unittest.cc
+pgsql_cb_unittests_SOURCES += pgsql_cb_dhcp6_unittest.cc
+pgsql_cb_unittests_SOURCES += pgsql_cb_dhcp6_mgr_unittest.cc
+pgsql_cb_unittests_SOURCES += run_unittests.cc
+
+pgsql_cb_unittests_CPPFLAGS = $(AM_CPPFLAGS) $(GTEST_INCLUDES) $(LOG4CPLUS_INCLUDES)
+
+pgsql_cb_unittests_LDFLAGS  = $(AM_LDFLAGS) $(CRYPTO_LDFLAGS) $(GTEST_LDFLAGS)
+
+pgsql_cb_unittests_CXXFLAGS = $(AM_CXXFLAGS)
+
+pgsql_cb_unittests_LDADD  = $(top_builddir)/src/hooks/dhcp/pgsql_cb/libpgsqlcb.la
+pgsql_cb_unittests_LDADD += $(top_builddir)/src/lib/dhcpsrv/testutils/libdhcpsrvtest.la
+pgsql_cb_unittests_LDADD += $(top_builddir)/src/lib/dhcpsrv/libkea-dhcpsrv.la
+pgsql_cb_unittests_LDADD += $(top_builddir)/src/lib/process/libkea-process.la
+pgsql_cb_unittests_LDADD += $(top_builddir)/src/lib/eval/libkea-eval.la
+pgsql_cb_unittests_LDADD += $(top_builddir)/src/lib/dhcp_ddns/libkea-dhcp_ddns.la
+pgsql_cb_unittests_LDADD += $(top_builddir)/src/lib/stats/libkea-stats.la
+pgsql_cb_unittests_LDADD += $(top_builddir)/src/lib/config/libkea-cfgclient.la
+pgsql_cb_unittests_LDADD += $(top_builddir)/src/lib/http/libkea-http.la
+pgsql_cb_unittests_LDADD += $(top_builddir)/src/lib/dhcp/libkea-dhcp++.la
+pgsql_cb_unittests_LDADD += $(top_builddir)/src/lib/hooks/libkea-hooks.la
+pgsql_cb_unittests_LDADD += $(top_builddir)/src/lib/pgsql/testutils/libpgsqltest.la
+pgsql_cb_unittests_LDADD += $(top_builddir)/src/lib/pgsql/libkea-pgsql.la
+pgsql_cb_unittests_LDADD += $(top_builddir)/src/lib/database/libkea-database.la
+pgsql_cb_unittests_LDADD += $(top_builddir)/src/lib/cc/libkea-cc.la
+pgsql_cb_unittests_LDADD += $(top_builddir)/src/lib/asiolink/libkea-asiolink.la
+pgsql_cb_unittests_LDADD += $(top_builddir)/src/lib/dns/libkea-dns++.la
+pgsql_cb_unittests_LDADD += $(top_builddir)/src/lib/cryptolink/libkea-cryptolink.la
+pgsql_cb_unittests_LDADD += $(top_builddir)/src/lib/log/libkea-log.la
+pgsql_cb_unittests_LDADD += $(top_builddir)/src/lib/util/libkea-util.la
+pgsql_cb_unittests_LDADD += $(top_builddir)/src/lib/exceptions/libkea-exceptions.la
+pgsql_cb_unittests_LDADD += $(LOG4CPLUS_LIBS)
+pgsql_cb_unittests_LDADD += $(CRYPTO_LIBS)
+pgsql_cb_unittests_LDADD += $(BOOST_LIBS)
+pgsql_cb_unittests_LDADD += $(GTEST_LDADD)
+endif
+noinst_PROGRAMS = $(TESTS)
diff --git a/src/hooks/dhcp/pgsql_cb/tests/Makefile.in b/src/hooks/dhcp/pgsql_cb/tests/Makefile.in
new file mode 100644
index 0000000..e9a4ae9
--- /dev/null
+++ b/src/hooks/dhcp/pgsql_cb/tests/Makefile.in
@@ -0,0 +1,1127 @@
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+	    else \
+	      skipped="($$skip tests were not run)"; \
+	    fi; \
+	    test `echo "$$skipped" | wc -c` -le `echo "$$banner" | wc -c` || \
+	      dashes="$$skipped"; \
+	  fi; \
+	  report=""; \
+	  if test "$$failed" -ne 0 && test -n "$(PACKAGE_BUGREPORT)"; then \
+	    report="Please report to $(PACKAGE_BUGREPORT)"; \
+	    test `echo "$$report" | wc -c` -le `echo "$$banner" | wc -c` || \
+	      dashes="$$report"; \
+	  fi; \
+	  dashes=`echo "$$dashes" | sed s/./=/g`; \
+	  if test "$$failed" -eq 0; then \
+	    col="$$grn"; \
+	  else \
+	    col="$$red"; \
+	  fi; \
+	  echo "$${col}$$dashes$${std}"; \
+	  echo "$${col}$$banner$${std}"; \
+	  test -z "$$skipped" || echo "$${col}$$skipped$${std}"; \
+	  test -z "$$report" || echo "$${col}$$report$${std}"; \
+	  echo "$${col}$$dashes$${std}"; \
+	  test "$$failed" -eq 0; \
+	else :; fi
+distdir: $(BUILT_SOURCES)
+	$(MAKE) $(AM_MAKEFLAGS) distdir-am
+
+distdir-am: $(DISTFILES)
+	@srcdirstrip=`echo "$(srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
+	topsrcdirstrip=`echo "$(top_srcdir)" | sed 's/[].[^$$\\*]/\\\\&/g'`; \
+	list='$(DISTFILES)'; \
+	  dist_files=`for file in $$list; do echo $$file; done | \
+	  sed -e "s|^$$srcdirstrip/||;t" \
+	      -e "s|^$$topsrcdirstrip/|$(top_builddir)/|;t"`; \
+	case $$dist_files in \
+	  */*) $(MKDIR_P) `echo "$$dist_files" | \
+			   sed '/\//!d;s|^|$(distdir)/|;s,/[^/]*$$,,' | \
+			   sort -u` ;; \
+	esac; \
+	for file in $$dist_files; do \
+	  if test -f $$file || test -d $$file; then d=.; else d=$(srcdir); fi; \
+	  if test -d $$d/$$file; then \
+	    dir=`echo "/$$file" | sed -e 's,/[^/]*$$,,'`; \
+	    if test -d "$(distdir)/$$file"; then \
+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+	    fi; \
+	    if test -d $(srcdir)/$$file && test $$d != $(srcdir); then \
+	      cp -fpR $(srcdir)/$$file "$(distdir)$$dir" || exit 1; \
+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+	    fi; \
+	    cp -fpR $$d/$$file "$(distdir)$$dir" || exit 1; \
+	  else \
+	    test -f "$(distdir)/$$file" \
+	    || cp -p $$d/$$file "$(distdir)/$$file" \
+	    || exit 1; \
+	  fi; \
+	done
+	@list='$(DIST_SUBDIRS)'; for subdir in $$list; do \
+	  if test "$$subdir" = .; then :; else \
+	    $(am__make_dryrun) \
+	      || test -d "$(distdir)/$$subdir" \
+	      || $(MKDIR_P) "$(distdir)/$$subdir" \
+	      || exit 1; \
+	    dir1=$$subdir; dir2="$(distdir)/$$subdir"; \
+	    $(am__relativize); \
+	    new_distdir=$$reldir; \
+	    dir1=$$subdir; dir2="$(top_distdir)"; \
+	    $(am__relativize); \
+	    new_top_distdir=$$reldir; \
+	    echo " (cd $$subdir && $(MAKE) $(AM_MAKEFLAGS) top_distdir="$$new_top_distdir" distdir="$$new_distdir" \\"; \
+	    echo "     am__remove_distdir=: am__skip_length_check=: am__skip_mode_fix=: distdir)"; \
+	    ($(am__cd) $$subdir && \
+	      $(MAKE) $(AM_MAKEFLAGS) \
+	        top_distdir="$$new_top_distdir" \
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+		am__remove_distdir=: \
+		am__skip_length_check=: \
+		am__skip_mode_fix=: \
+	        distdir) \
+	      || exit 1; \
+	  fi; \
+	done
+check-am: all-am
+	$(MAKE) $(AM_MAKEFLAGS) check-TESTS
+check: check-recursive
+all-am: Makefile $(PROGRAMS)
+installdirs: installdirs-recursive
+installdirs-am:
+install: install-recursive
+install-exec: install-exec-recursive
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+install-am: all-am
+	@$(MAKE) $(AM_MAKEFLAGS) install-exec-am install-data-am
+
+installcheck: installcheck-recursive
+install-strip:
+	if test -z '$(STRIP)'; then \
+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	      install; \
+	else \
+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	    "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'" install; \
+	fi
+mostlyclean-generic:
+
+clean-generic:
+	-test -z "$(CLEANFILES)" || rm -f $(CLEANFILES)
+
+distclean-generic:
+	-test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
+	-test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
+
+maintainer-clean-generic:
+	@echo "This command is intended for maintainers to use"
+	@echo "it deletes files that may require special tools to rebuild."
+clean: clean-recursive
+
+clean-am: clean-generic clean-libtool clean-noinstPROGRAMS \
+	mostlyclean-am
+
+distclean: distclean-recursive
+		-rm -f ./$(DEPDIR)/pgsql_cb_unittests-pgsql_cb_dhcp4_mgr_unittest.Po
+	-rm -f ./$(DEPDIR)/pgsql_cb_unittests-pgsql_cb_dhcp4_unittest.Po
+	-rm -f ./$(DEPDIR)/pgsql_cb_unittests-pgsql_cb_dhcp6_mgr_unittest.Po
+	-rm -f ./$(DEPDIR)/pgsql_cb_unittests-pgsql_cb_dhcp6_unittest.Po
+	-rm -f ./$(DEPDIR)/pgsql_cb_unittests-pgsql_cb_impl_unittest.Po
+	-rm -f ./$(DEPDIR)/pgsql_cb_unittests-run_unittests.Po
+	-rm -f Makefile
+distclean-am: clean-am distclean-compile distclean-generic \
+	distclean-tags
+
+dvi: dvi-recursive
+
+dvi-am:
+
+html: html-recursive
+
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+install-ps-am:
+
+installcheck-am:
+
+maintainer-clean: maintainer-clean-recursive
+		-rm -f ./$(DEPDIR)/pgsql_cb_unittests-pgsql_cb_dhcp4_mgr_unittest.Po
+	-rm -f ./$(DEPDIR)/pgsql_cb_unittests-pgsql_cb_dhcp4_unittest.Po
+	-rm -f ./$(DEPDIR)/pgsql_cb_unittests-pgsql_cb_dhcp6_mgr_unittest.Po
+	-rm -f ./$(DEPDIR)/pgsql_cb_unittests-pgsql_cb_dhcp6_unittest.Po
+	-rm -f ./$(DEPDIR)/pgsql_cb_unittests-pgsql_cb_impl_unittest.Po
+	-rm -f ./$(DEPDIR)/pgsql_cb_unittests-run_unittests.Po
+	-rm -f Makefile
+maintainer-clean-am: distclean-am maintainer-clean-generic
+
+mostlyclean: mostlyclean-recursive
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+mostlyclean-am: mostlyclean-compile mostlyclean-generic \
+	mostlyclean-libtool
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+pdf: pdf-recursive
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+pdf-am:
+
+ps: ps-recursive
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+ps-am:
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+uninstall-am:
+
+.MAKE: $(am__recursive_targets) check-am install-am install-strip
+
+.PHONY: $(am__recursive_targets) CTAGS GTAGS TAGS all all-am \
+	am--depfiles check check-TESTS check-am clean clean-generic \
+	clean-libtool clean-noinstPROGRAMS cscopelist-am ctags \
+	ctags-am distclean distclean-compile distclean-generic \
+	distclean-libtool distclean-tags distdir dvi dvi-am html \
+	html-am info info-am install install-am install-data \
+	install-data-am install-dvi install-dvi-am install-exec \
+	install-exec-am install-html install-html-am install-info \
+	install-info-am install-man install-pdf install-pdf-am \
+	install-ps install-ps-am install-strip installcheck \
+	installcheck-am installdirs installdirs-am maintainer-clean \
+	maintainer-clean-generic mostlyclean mostlyclean-compile \
+	mostlyclean-generic mostlyclean-libtool pdf pdf-am ps ps-am \
+	tags tags-am uninstall uninstall-am
+
+.PRECIOUS: Makefile
+
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/src/hooks/dhcp/pgsql_cb/tests/pgsql_cb_dhcp4_mgr_unittest.cc b/src/hooks/dhcp/pgsql_cb/tests/pgsql_cb_dhcp4_mgr_unittest.cc
new file mode 100644
index 0000000..5eb0df5
--- /dev/null
+++ b/src/hooks/dhcp/pgsql_cb/tests/pgsql_cb_dhcp4_mgr_unittest.cc
@@ -0,0 +1,88 @@
+// Copyright (C) 2022 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 <cc/stamped_value.h>
+#include <dhcpsrv/config_backend_dhcp4_mgr.h>
+#include <pgsql_cb_dhcp4.h>
+#include <pgsql/testutils/pgsql_schema.h>
+#include <dhcpsrv/testutils/generic_backend_unittest.h>
+#include <boost/shared_ptr.hpp>
+#include <gtest/gtest.h>
+
+using namespace isc::data;
+using namespace isc::dhcp;
+using namespace isc::dhcp::test;
+using namespace isc::db;
+using namespace isc::db::test;
+
+namespace {
+
+/// @brief Test fixture class for @c PgSqlConfigBackendDHCPv4Mgr.
+class PgSqlConfigBackendDHCPv4MgrTest : public GenericBackendTest {
+public:
+    /// @brief Constructor.
+    PgSqlConfigBackendDHCPv4MgrTest() {
+        // Recreate a fresh mgr.
+        ConfigBackendDHCPv4Mgr::create();
+
+        // Ensure we have the proper schema with no transient data.
+        createPgSQLSchema();
+    }
+
+    /// @brief Destructor.
+    virtual ~PgSqlConfigBackendDHCPv4MgrTest() {
+        // Destroy the mgr.
+        ConfigBackendDHCPv4Mgr::destroy();
+
+        // If data wipe enabled, delete transient data otherwise destroy the schema.
+        destroyPgSQLSchema();
+    }
+};
+
+// This test verifies that PgSQL backend can be registered with and
+// unregistered from the Config Backend Manager.
+TEST_F(PgSqlConfigBackendDHCPv4MgrTest, factoryRegistration) {
+
+    // Get the mgr singleton.
+    ConfigBackendDHCPv4Mgr& mgr = ConfigBackendDHCPv4Mgr::instance();
+
+    // With no factory registered, attempting to add a PgSQL db should fail.
+    ASSERT_THROW(mgr.addBackend(validPgSQLConnectionString()), InvalidType);
+
+    // Now we'll register the PgSQL factory.
+    ASSERT_NO_THROW(PgSqlConfigBackendDHCPv4::registerBackendType());
+
+    // With the factory registered, attempting to add a PgSQL db should succeed.
+    ASSERT_NO_THROW(mgr.addBackend(validPgSQLConnectionString()));
+
+    // Create a PgSQL backend selector for convenience.
+    BackendSelector pgsql(BackendSelector::Type::POSTGRESQL);
+
+    // Should be able to create a global parameter.
+    StampedValuePtr server_tag = StampedValue::create("server-tag", "whale");
+    ASSERT_NO_THROW(mgr.getPool()->createUpdateGlobalParameter4(pgsql, ServerSelector::ALL(),
+                                                                server_tag));
+    // Verify parameter can be fetched.
+    server_tag.reset();
+    ASSERT_NO_THROW(server_tag = mgr.getPool()->getGlobalParameter4(pgsql, ServerSelector::ALL(),
+                                                                    "server-tag"));
+    ASSERT_TRUE(server_tag);
+    EXPECT_EQ("server-tag", server_tag->getName());
+    EXPECT_EQ("whale", server_tag->getValue());
+
+    // Now we'll unregister PgSQL.
+    ASSERT_NO_THROW(PgSqlConfigBackendDHCPv4::unregisterBackendType());
+
+    // With no factory registered, attempting to add a PgSQL db should fail.
+    ASSERT_THROW(mgr.addBackend(validPgSQLConnectionString()), InvalidType);
+
+    // Attempting to read the global parameter should fail.
+    ASSERT_THROW(mgr.getPool()->getGlobalParameter4(pgsql, ServerSelector::ALL(), "server-tag"),
+                 NoSuchDatabase);
+}
+
+}
diff --git a/src/hooks/dhcp/pgsql_cb/tests/pgsql_cb_dhcp4_unittest.cc b/src/hooks/dhcp/pgsql_cb/tests/pgsql_cb_dhcp4_unittest.cc
new file mode 100644
index 0000000..f6faa1b
--- /dev/null
+++ b/src/hooks/dhcp/pgsql_cb/tests/pgsql_cb_dhcp4_unittest.cc
@@ -0,0 +1,553 @@
+// Copyright (C) 2021-2022 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 <database/db_exceptions.h>
+#include <database/server.h>
+#include <dhcpsrv/cfgmgr.h>
+#include <dhcpsrv/config_backend_dhcp4_mgr.h>
+#include <dhcpsrv/testutils/generic_cb_dhcp4_unittest.h>
+#include <dhcpsrv/testutils/generic_cb_recovery_unittest.h>
+#include <dhcpsrv/testutils/pgsql_generic_backend_unittest.h>
+#include <dhcpsrv/testutils/test_utils.h>
+#include <pgsql_cb_dhcp4.h>
+#include <pgsql/testutils/pgsql_schema.h>
+#include <testutils/multi_threading_utils.h>
+#include <testutils/gtest_utils.h>
+
+#include <boost/make_shared.hpp>
+#include <boost/shared_ptr.hpp>
+#include <gtest/gtest.h>
+#include <map>
+#include <sstream>
+
+using namespace isc;
+using namespace isc::asiolink;
+using namespace isc::db;
+using namespace isc::db::test;
+using namespace isc::data;
+using namespace isc::dhcp;
+using namespace isc::dhcp::test;
+using namespace isc::process;
+using namespace isc::test;
+using namespace isc::util;
+namespace ph = std::placeholders;
+
+namespace {
+
+/// @brief Test implementation of the PostgreSQL configuration backend.
+///
+/// It exposes protected members of the @c PgSqlConfigBackendDHCPv4.
+class TestPgSqlConfigBackendDHCPv4 : public PgSqlConfigBackendDHCPv4 {
+public:
+
+    /// @brief Constructor.
+    ///
+    /// @param parameters A data structure relating keywords and values
+    /// concerned with the database.
+    explicit TestPgSqlConfigBackendDHCPv4(const DatabaseConnection::ParameterMap& parameters)
+        : PgSqlConfigBackendDHCPv4(parameters) {
+    }
+
+    using PgSqlConfigBackendDHCPv4::base_impl_;
+};
+
+/// @brief Test fixture class for @c PgSqlConfigBackendDHCPv4.
+class PgSqlConfigBackendDHCPv4Test : public GenericConfigBackendDHCPv4Test {
+public:
+    /// @brief Constructor.
+    PgSqlConfigBackendDHCPv4Test() {}
+
+    /// @brief Destructor.
+    virtual ~PgSqlConfigBackendDHCPv4Test() {}
+
+    /// @brief Creates the PostgreSQL back end schema
+    virtual void createSchema() {
+        createPgSQLSchema();
+    }
+
+    /// @brief Destroys the PostgreSQL back end schema
+    virtual void destroySchema() {
+        destroyPgSQLSchema();
+    }
+
+    /// @brief Returns a valid PostgreSQL back end specific connection
+    /// string
+    std::string validConnectionString() {
+        return (validPgSQLConnectionString());
+    }
+
+    /// @brief Instantiates an instance of a PostgreSQL DHCPv4 configuration
+    /// back end.
+    ///
+    /// @params Connection parameters describing the back end to create.
+    ///
+    /// @return Pointer to the newly created back end instance.
+    ConfigBackendDHCPv4Ptr backendFactory(db::DatabaseConnection::ParameterMap&
+                                          params) {
+
+        return (ConfigBackendDHCPv4Ptr(new TestPgSqlConfigBackendDHCPv4(params)));
+    }
+
+    /// @brief Counts rows in a selected table in PostgreSQL database.
+    ///
+    /// This method can be used to verify that some configuration elements were
+    /// deleted from a selected table as a result of cascade delete or a trigger.
+    /// For example, deleting a subnet should trigger deletion of its address
+    /// pools and options. By counting the rows on each table we can determine
+    /// whether the deletion took place on all tables for which it was expected.
+    ///
+    /// @param table Table name.
+    /// @return Number of rows in the specified table.
+    size_t countRows(const std::string& table) const {
+        auto p = boost::dynamic_pointer_cast<TestPgSqlConfigBackendDHCPv4>(cbptr_);
+        if (!p) {
+            ADD_FAILURE() << "cbptr_ does not cast to TestPgSqlConfigBackendDHCPv4";
+            return (0);
+        }
+
+        // Reuse the existing connection of the backend.
+        auto impl = boost::dynamic_pointer_cast<PgSqlConfigBackendImpl>(p->base_impl_);
+        auto& conn = impl->conn_;
+
+        return (PgSqlGenericBackendTest::countRows(conn, table));
+    }
+};
+
+TEST_F(PgSqlConfigBackendDHCPv4Test, getType) {
+    getTypeTest("postgresql");
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4Test, getHost) {
+    getHostTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4Test, getPort) {
+    getPortTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4Test, createUpdateDeleteServerTest) {
+    createUpdateDeleteServerTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4Test, getAndDeleteAllServersTest) {
+    getAndDeleteAllServersTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4Test, createUpdateDeleteGlobalParameter4Test) {
+    createUpdateDeleteGlobalParameter4Test();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4Test, globalParameters4WithServerTagsTest) {
+    globalParameters4WithServerTagsTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4Test, getAllGlobalParameters4Test) {
+    getAllGlobalParameters4Test();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4Test, getModifiedGlobalParameters4Test) {
+    getModifiedGlobalParameters4Test();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4Test, nullKeyErrorTest) {
+    nullKeyErrorTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4Test, createUpdateSubnet4SelectorsTest) {
+    createUpdateSubnet4SelectorsTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4Test, getSubnet4Test) {
+    getSubnet4Test();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4Test, getSubnet4byIdSelectorsTest) {
+    getSubnet4byIdSelectorsTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4Test, getSubnet4WithOptionalUnspecifiedTest) {
+    getSubnet4WithOptionalUnspecifiedTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4Test, getSubnet4SharedNetworkTest) {
+    getSubnet4SharedNetworkTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4Test, getSubnet4ByPrefixTest) {
+    getSubnet4ByPrefixTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4Test, getSubnet4byPrefixSelectorsTest) {
+    getSubnet4byPrefixSelectorsTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4Test, getAllSubnets4Test) {
+    getAllSubnets4Test();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4Test, getAllSubnets4SelectorsTest) {
+    getAllSubnets4SelectorsTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4Test, getAllSubnets4WithServerTagsTest) {
+    getAllSubnets4WithServerTagsTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4Test, getModifiedSubnets4SelectorsTest) {
+    getModifiedSubnets4SelectorsTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4Test, deleteSubnet4Test) {
+    deleteSubnet4Test();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4Test, deleteSubnet4ByIdSelectorsTest) {
+    deleteSubnet4ByIdSelectorsTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4Test, deleteSubnet4ByPrefixSelectorsTest) {
+    deleteSubnet4ByPrefixSelectorsTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4Test, deleteAllSubnets4SelectorsTest) {
+    deleteAllSubnets4SelectorsTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4Test, unassignedSubnet4Test) {
+    unassignedSubnet4Test();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4Test, getModifiedSubnets4Test) {
+    getModifiedSubnets4Test();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4Test, subnetLifetimeTest) {
+    subnetLifetimeTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4Test, getSharedNetworkSubnets4Test) {
+    getSharedNetworkSubnets4Test();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4Test, subnetUpdatePoolsTest) {
+    subnetUpdatePoolsTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4Test, subnetOptionsTest) {
+    subnetOptionsTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4Test, getSharedNetwork4Test) {
+    getSharedNetwork4Test();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4Test, getSharedNetwork4SelectorsTest) {
+    getSharedNetwork4SelectorsTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4Test, createUpdateSharedNetwork4Test) {
+    createUpdateSharedNetwork4Test();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4Test, createUpdateSharedNetwork4SelectorsTest) {
+    createUpdateSharedNetwork4SelectorsTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4Test, getSharedNetwork4WithOptionalUnspecifiedTest) {
+    getSharedNetwork4WithOptionalUnspecifiedTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4Test, deleteSharedNetworkSubnets4Test) {
+    deleteSharedNetworkSubnets4Test();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4Test, getAllSharedNetworks4Test) {
+    getAllSharedNetworks4Test();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4Test, getAllSharedNetworks4SelectorsTest) {
+    getAllSharedNetworks4SelectorsTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4Test, getAllSharedNetworks4WithServerTagsTest) {
+    getAllSharedNetworks4WithServerTagsTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4Test, getModifiedSharedNetworks4Test) {
+    getModifiedSharedNetworks4Test();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4Test, getModifiedSharedNetworks4SelectorsTest) {
+    getModifiedSharedNetworks4SelectorsTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4Test, deleteSharedNetwork4Test) {
+    deleteSharedNetwork4Test();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4Test, deleteSharedNetwork4SelectorsTest) {
+    deleteSharedNetwork4SelectorsTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4Test, deleteAllSharedNetworks4SelectorsTest) {
+    deleteAllSharedNetworks4SelectorsTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4Test, unassignedSharedNetworkTest) {
+    unassignedSharedNetworkTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4Test, sharedNetworkLifetimeTest) {
+    sharedNetworkLifetimeTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4Test, sharedNetworkOptionsTest) {
+    sharedNetworkOptionsTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4Test, getOptionDef4Test) {
+    getOptionDef4Test();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4Test, optionDefs4WithServerTagsTest) {
+    optionDefs4WithServerTagsTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4Test, getAllOptionDefs4Test) {
+    getAllOptionDefs4Test();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4Test, getModifiedOptionDefs4Test) {
+    getModifiedOptionDefs4Test();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4Test, createUpdateDeleteOption4Test) {
+    createUpdateDeleteOption4Test();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4Test, globalOptions4WithServerTagsTest) {
+    globalOptions4WithServerTagsTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4Test, getAllOptions4Test) {
+    getAllOptions4Test();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4Test, getModifiedOptions4Test) {
+    getModifiedOptions4Test();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4Test, createUpdateDeleteSubnetOption4Test) {
+    createUpdateDeleteSubnetOption4Test();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4Test, createUpdateDeletePoolOption4Test) {
+    createUpdateDeletePoolOption4Test();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4Test, createUpdateDeleteSharedNetworkOption4Test) {
+    createUpdateDeleteSharedNetworkOption4Test();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4Test, subnetOptionIdOrderTest) {
+    subnetOptionIdOrderTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4Test, sharedNetworkOptionIdOrderTest) {
+    sharedNetworkOptionIdOrderTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4Test, setAndGetAllClientClasses4Test) {
+    setAndGetAllClientClasses4Test();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4Test, getClientClass4Test) {
+    getClientClass4Test();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4Test, createUpdateClientClass4OptionsTest) {
+    createUpdateClientClass4OptionsTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4Test, getModifiedClientClasses4Test) {
+    getModifiedClientClasses4Test();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4Test, deleteClientClass4Test) {
+    deleteClientClass4Test();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4Test, deleteAllClientClasses4Test) {
+    deleteAllClientClasses4Test();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4Test, clientClassDependencies4Test) {
+    clientClassDependencies4Test();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4Test, multipleAuditEntriesTest) {
+    multipleAuditEntriesTest();
+}
+
+/// @brief Test fixture for verifying database connection loss-recovery
+/// behavior.
+class PgSqlConfigBackendDHCPv4DbLostCallbackTest : public GenericConfigBackendDbLostCallbackTest {
+public:
+    /// @brief Constructor
+    PgSqlConfigBackendDHCPv4DbLostCallbackTest() {};
+
+    /// @brief Destructor
+    virtual ~PgSqlConfigBackendDHCPv4DbLostCallbackTest() {};
+
+    /// @brief Creates the PostgreSQL CB schema.
+    virtual void createSchema() {
+        createPgSQLSchema();
+    }
+
+    /// @brief Destroys the PostgreSQL CB schema.
+    virtual void destroySchema() {
+        destroyPgSQLSchema();
+    }
+
+    /// @brief Method which returns a valid back end specific connection
+    /// string
+    virtual std::string validConnectionString() {
+        return (validPgSQLConnectionString());
+    }
+
+    /// @brief Method which returns an invalid back end specific connection
+    /// string.
+    virtual std::string invalidConnectionString() {
+        return (connectionString(PGSQL_VALID_TYPE, INVALID_NAME, VALID_HOST,
+                                 VALID_USER, VALID_PASSWORD));
+    }
+
+    /// @brief Registers PostgreSQL as a CB backend type.
+    virtual void registerBackendType() {
+        isc::dhcp::PgSqlConfigBackendDHCPv4::registerBackendType();
+    }
+
+    /// @brief Unregisters PostgreSQL as a CB backend type.
+    virtual void unregisterBackendType() {
+        isc::dhcp::PgSqlConfigBackendDHCPv4::unregisterBackendType();
+    }
+
+    /// @brief Sets the IOService instance in the CB implementation object.
+    ///
+    /// @param io_service pointer to the IOService instance to use. It may be
+    /// an empty pointer.
+    virtual void setConfigBackendImplIOService(isc::asiolink::IOServicePtr io_service) {
+        isc::dhcp::PgSqlConfigBackendImpl::setIOService(io_service);
+    }
+
+    /// @brief Attempts to add a backend instance to the CB manager.
+    ///
+    /// @param access Connection access string containing the database
+    /// connection parameters.
+    virtual void addBackend(const std::string& access) {
+        ConfigBackendDHCPv4Mgr::instance().addBackend(access);
+    }
+
+    /// @brief Fetches a collection of all the servers currently in
+    /// the CB database. This function is used to check the operability
+    /// of the CB backend.
+    ServerCollection getAllServers() {
+        return (ConfigBackendDHCPv4Mgr::instance().getPool()->getAllServers4(BackendSelector()));
+    }
+};
+
+TEST_F(PgSqlConfigBackendDHCPv4DbLostCallbackTest, testRetryOpenDbLostAndRecoveredCallback) {
+    MultiThreadingTest mt(false);
+    testRetryOpenDbLostAndRecoveredCallback();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4DbLostCallbackTest, testRetryOpenDbLostAndRecoveredCallbackMultiThreading) {
+    MultiThreadingTest mt(true);
+    testRetryOpenDbLostAndRecoveredCallback();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4DbLostCallbackTest, testRetryOpenDbLostAndFailedCallback) {
+    MultiThreadingTest mt(false);
+    testRetryOpenDbLostAndFailedCallback();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4DbLostCallbackTest, testRetryOpenDbLostAndFailedCallbackMultiThreading) {
+    MultiThreadingTest mt(true);
+    testRetryOpenDbLostAndFailedCallback();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4DbLostCallbackTest, testRetryOpenDbLostAndRecoveredAfterTimeoutCallback) {
+    MultiThreadingTest mt(false);
+    testRetryOpenDbLostAndRecoveredAfterTimeoutCallback();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4DbLostCallbackTest, testRetryOpenDbLostAndRecoveredAfterTimeoutCallbackMultiThreading) {
+    MultiThreadingTest mt(true);
+    testRetryOpenDbLostAndRecoveredAfterTimeoutCallback();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4DbLostCallbackTest, testRetryOpenDbLostAndFailedAfterTimeoutCallback) {
+    MultiThreadingTest mt(false);
+    testRetryOpenDbLostAndFailedAfterTimeoutCallback();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4DbLostCallbackTest, testRetryOpenDbLostAndFailedAfterTimeoutCallbackMultiThreading) {
+    MultiThreadingTest mt(true);
+    testRetryOpenDbLostAndFailedAfterTimeoutCallback();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4DbLostCallbackTest, testNoCallbackOnOpenFailure) {
+    MultiThreadingTest mt(false);
+    testNoCallbackOnOpenFailure();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4DbLostCallbackTest, testNoCallbackOnOpenFailureMultiThreading) {
+    MultiThreadingTest mt(true);
+    testNoCallbackOnOpenFailure();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4DbLostCallbackTest, testDbLostAndRecoveredCallback) {
+    MultiThreadingTest mt(false);
+    testDbLostAndRecoveredCallback();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4DbLostCallbackTest, testDbLostAndRecoveredCallbackMultiThreading) {
+    MultiThreadingTest mt(true);
+    testDbLostAndRecoveredCallback();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4DbLostCallbackTest, testDbLostAndFailedCallback) {
+    MultiThreadingTest mt(false);
+    testDbLostAndFailedCallback();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4DbLostCallbackTest, testDbLostAndFailedCallbackMultiThreading) {
+    MultiThreadingTest mt(true);
+    testDbLostAndFailedCallback();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4DbLostCallbackTest, testDbLostAndRecoveredAfterTimeoutCallback) {
+    MultiThreadingTest mt(false);
+    testDbLostAndRecoveredAfterTimeoutCallback();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4DbLostCallbackTest, testDbLostAndRecoveredAfterTimeoutCallbackMultiThreading) {
+    MultiThreadingTest mt(true);
+    testDbLostAndRecoveredAfterTimeoutCallback();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4DbLostCallbackTest, testDbLostAndFailedAfterTimeoutCallback) {
+    MultiThreadingTest mt(false);
+    testDbLostAndFailedAfterTimeoutCallback();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv4DbLostCallbackTest, testDbLostAndFailedAfterTimeoutCallbackMultiThreading) {
+    MultiThreadingTest mt(true);
+    testDbLostAndFailedAfterTimeoutCallback();
+}
+
+}
diff --git a/src/hooks/dhcp/pgsql_cb/tests/pgsql_cb_dhcp6_mgr_unittest.cc b/src/hooks/dhcp/pgsql_cb/tests/pgsql_cb_dhcp6_mgr_unittest.cc
new file mode 100644
index 0000000..cb2b699
--- /dev/null
+++ b/src/hooks/dhcp/pgsql_cb/tests/pgsql_cb_dhcp6_mgr_unittest.cc
@@ -0,0 +1,88 @@
+// Copyright (C) 2022 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 <cc/stamped_value.h>
+#include <dhcpsrv/config_backend_dhcp6_mgr.h>
+#include <pgsql_cb_dhcp6.h>
+#include <pgsql/testutils/pgsql_schema.h>
+#include <dhcpsrv/testutils/generic_backend_unittest.h>
+#include <boost/shared_ptr.hpp>
+#include <gtest/gtest.h>
+
+using namespace isc::data;
+using namespace isc::dhcp;
+using namespace isc::dhcp::test;
+using namespace isc::db;
+using namespace isc::db::test;
+
+namespace {
+
+/// @brief Test fixture class for @c PgSqlConfigBackendDHCPv6Mgr.
+class PgSqlConfigBackendDHCPv6MgrTest : public GenericBackendTest {
+public:
+    /// @brief Constructor.
+    PgSqlConfigBackendDHCPv6MgrTest() {
+        // Recreate a fresh mgr.
+        ConfigBackendDHCPv6Mgr::create();
+
+        // Ensure we have the proper schema with no transient data.
+        createPgSQLSchema();
+    }
+
+    /// @brief Destructor.
+    virtual ~PgSqlConfigBackendDHCPv6MgrTest() {
+        // Destroy the mgr.
+        ConfigBackendDHCPv6Mgr::destroy();
+
+        // If data wipe enabled, delete transient data otherwise destroy the schema.
+        destroyPgSQLSchema();
+    }
+};
+
+// This test verifies that PgSQL backend can be registered with and
+// unregistered from the Config Backend Manager.
+TEST_F(PgSqlConfigBackendDHCPv6MgrTest, factoryRegistration) {
+
+    // Get the mgr singleton.
+    ConfigBackendDHCPv6Mgr& mgr = ConfigBackendDHCPv6Mgr::instance();
+
+    // With no factory registered, attempting to add a PgSQL db should fail.
+    ASSERT_THROW(mgr.addBackend(validPgSQLConnectionString()), InvalidType);
+
+    // Now we'll register the PgSQL factory.
+    ASSERT_NO_THROW(PgSqlConfigBackendDHCPv6::registerBackendType());
+
+    // With the factory registered, attempting to add a PgSQL db should succeed.
+    ASSERT_NO_THROW(mgr.addBackend(validPgSQLConnectionString()));
+
+    // Create a PgSQL backend selector for convenience.
+    BackendSelector pgsql(BackendSelector::Type::POSTGRESQL);
+
+    // Should be able to create a global parameter.
+    StampedValuePtr server_tag = StampedValue::create("server-tag", "whale");
+    ASSERT_NO_THROW(mgr.getPool()->createUpdateGlobalParameter6(pgsql, ServerSelector::ALL(),
+                                                                server_tag));
+    // Verify parameter can be fetched.
+    server_tag.reset();
+    ASSERT_NO_THROW(server_tag = mgr.getPool()->getGlobalParameter6(pgsql, ServerSelector::ALL(),
+                                                                    "server-tag"));
+    ASSERT_TRUE(server_tag);
+    EXPECT_EQ("server-tag", server_tag->getName());
+    EXPECT_EQ("whale", server_tag->getValue());
+
+    // Now we'll unregister PgSQL.
+    ASSERT_NO_THROW(PgSqlConfigBackendDHCPv6::unregisterBackendType());
+
+    // With no factory registered, attempting to add a PgSQL db should fail.
+    ASSERT_THROW(mgr.addBackend(validPgSQLConnectionString()), InvalidType);
+
+    // Attempting to read the global parameter should fail.
+    ASSERT_THROW(mgr.getPool()->getGlobalParameter6(pgsql, ServerSelector::ALL(), "server-tag"),
+                 NoSuchDatabase);
+}
+
+}
diff --git a/src/hooks/dhcp/pgsql_cb/tests/pgsql_cb_dhcp6_unittest.cc b/src/hooks/dhcp/pgsql_cb/tests/pgsql_cb_dhcp6_unittest.cc
new file mode 100644
index 0000000..44e2e66
--- /dev/null
+++ b/src/hooks/dhcp/pgsql_cb/tests/pgsql_cb_dhcp6_unittest.cc
@@ -0,0 +1,557 @@
+// Copyright (C) 2022 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 <database/db_exceptions.h>
+#include <database/server.h>
+#include <dhcpsrv/cfgmgr.h>
+#include <dhcpsrv/config_backend_dhcp6_mgr.h>
+#include <dhcpsrv/testutils/generic_cb_dhcp6_unittest.h>
+#include <dhcpsrv/testutils/generic_cb_recovery_unittest.h>
+#include <dhcpsrv/testutils/pgsql_generic_backend_unittest.h>
+#include <dhcpsrv/testutils/test_utils.h>
+#include <pgsql_cb_dhcp6.h>
+#include <pgsql/testutils/pgsql_schema.h>
+#include <testutils/multi_threading_utils.h>
+#include <testutils/gtest_utils.h>
+
+#include <boost/make_shared.hpp>
+#include <boost/shared_ptr.hpp>
+#include <gtest/gtest.h>
+#include <map>
+#include <sstream>
+
+using namespace isc;
+using namespace isc::asiolink;
+using namespace isc::db;
+using namespace isc::db::test;
+using namespace isc::data;
+using namespace isc::dhcp;
+using namespace isc::dhcp::test;
+using namespace isc::process;
+using namespace isc::test;
+using namespace isc::util;
+namespace ph = std::placeholders;
+
+namespace {
+
+/// @brief Test implementation of the PostgreSQL configuration backend.
+///
+/// It exposes protected members of the @c PgSqlConfigBackendDHCPv6.
+class TestPgSqlConfigBackendDHCPv6 : public PgSqlConfigBackendDHCPv6 {
+public:
+
+    /// @brief Constructor.
+    ///
+    /// @param parameters A data structure relating keywords and values
+    /// concerned with the database.
+    explicit TestPgSqlConfigBackendDHCPv6(const DatabaseConnection::ParameterMap& parameters)
+        : PgSqlConfigBackendDHCPv6(parameters) {
+    }
+
+    using PgSqlConfigBackendDHCPv6::base_impl_;
+};
+
+/// @brief Test fixture class for @c PgSqlConfigBackendDHCPv6.
+class PgSqlConfigBackendDHCPv6Test : public GenericConfigBackendDHCPv6Test {
+public:
+    /// @brief Constructor.
+    PgSqlConfigBackendDHCPv6Test() {}
+
+    /// @brief Destructor.
+    virtual ~PgSqlConfigBackendDHCPv6Test() {}
+
+    /// @brief Creates the PostgreSQL back end schema
+    virtual void createSchema() {
+        createPgSQLSchema();
+    }
+
+    /// @brief Destroys the PostgreSQL back end schema
+    virtual void destroySchema() {
+        destroyPgSQLSchema();
+    }
+
+    /// @brief Returns a valid PostgreSQL back end specific connection
+    /// string
+    std::string validConnectionString() {
+        return (validPgSQLConnectionString());
+    }
+
+    /// @brief Instantiates an instance of a PostgreSQL DHCPv6 configuration
+    /// back end.
+    ///
+    /// @params Connection parameters describing the back end to create.
+    ///
+    /// @return Pointer to the newly created back end instance.
+    ConfigBackendDHCPv6Ptr backendFactory(db::DatabaseConnection::ParameterMap&
+                                          params) {
+
+        return (ConfigBackendDHCPv6Ptr(new TestPgSqlConfigBackendDHCPv6(params)));
+    }
+
+    /// @brief Counts rows in a selected table in PostgreSQL database.
+    ///
+    /// This method can be used to verify that some configuration elements were
+    /// deleted from a selected table as a result of cascade delete or a trigger.
+    /// For example, deleting a subnet should trigger deletion of its address
+    /// pools and options. By counting the rows on each table we can determine
+    /// whether the deletion took place on all tables for which it was expected.
+    ///
+    /// @param table Table name.
+    /// @return Number of rows in the specified table.
+    size_t countRows(const std::string& table) const {
+        auto p = boost::dynamic_pointer_cast<TestPgSqlConfigBackendDHCPv6>(cbptr_);
+        if (!p) {
+            ADD_FAILURE() << "cbptr_ does not cast to TestPgSqlConfigBackendDHCPv6";
+            return (0);
+        }
+
+        // Reuse the existing connection of the backend.
+        auto impl = boost::dynamic_pointer_cast<PgSqlConfigBackendImpl>(p->base_impl_);
+        auto& conn = impl->conn_;
+
+        return (PgSqlGenericBackendTest::countRows(conn, table));
+    }
+};
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, getType) {
+    getTypeTest("postgresql");
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, getHost) {
+    getHostTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, getPort) {
+    getPortTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, createUpdateDeleteServerTest) {
+    createUpdateDeleteServerTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, getAndDeleteAllServersTest) {
+    getAndDeleteAllServersTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, createUpdateDeleteGlobalParameter6Test) {
+    createUpdateDeleteGlobalParameter6Test();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, globalParameters6WithServerTagsTest) {
+    globalParameters6WithServerTagsTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, getAllGlobalParameters6Test) {
+    getAllGlobalParameters6Test();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, getModifiedGlobalParameters6Test) {
+    getModifiedGlobalParameters6Test();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, nullKeyErrorTest) {
+    nullKeyErrorTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, createUpdateSubnet6SelectorsTest) {
+    createUpdateSubnet6SelectorsTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, getSubnet6Test) {
+    getSubnet6Test();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, getSubnet6byIdSelectorsTest) {
+    getSubnet6byIdSelectorsTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, getSubnet6WithOptionalUnspecifiedTest) {
+    getSubnet6WithOptionalUnspecifiedTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, getSubnet6SharedNetworkTest) {
+    getSubnet6SharedNetworkTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, getSubnet6ByPrefixTest) {
+    getSubnet6ByPrefixTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, getSubnet6byPrefixSelectorsTest) {
+    getSubnet6byPrefixSelectorsTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, getAllSubnets6Test) {
+    getAllSubnets6Test();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, getAllSubnets6SelectorsTest) {
+    getAllSubnets6SelectorsTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, getAllSubnets6WithServerTagsTest) {
+    getAllSubnets6WithServerTagsTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, getModifiedSubnets6SelectorsTest) {
+    getModifiedSubnets6SelectorsTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, deleteSubnet6Test) {
+    deleteSubnet6Test();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, deleteSubnet6ByIdSelectorsTest) {
+    deleteSubnet6ByIdSelectorsTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, deleteSubnet6ByPrefixSelectorsTest) {
+    deleteSubnet6ByPrefixSelectorsTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, deleteAllSubnets6SelectorsTest) {
+    deleteAllSubnets6SelectorsTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, unassignedSubnet6Test) {
+    unassignedSubnet6Test();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, getModifiedSubnets6Test) {
+    getModifiedSubnets6Test();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, subnetLifetimeTest) {
+    subnetLifetimeTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, getSharedNetworkSubnets6Test) {
+    getSharedNetworkSubnets6Test();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, subnetUpdatePoolsTest) {
+    subnetUpdatePoolsTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, subnetOptionsTest) {
+    subnetOptionsTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, getSharedNetwork6Test) {
+    getSharedNetwork6Test();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, getSharedNetwork6SelectorsTest) {
+    getSharedNetwork6SelectorsTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, createUpdateSharedNetwork6Test) {
+    createUpdateSharedNetwork6Test();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, createUpdateSharedNetwork6SelectorsTest) {
+    createUpdateSharedNetwork6SelectorsTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, getSharedNetwork6WithOptionalUnspecifiedTest) {
+    getSharedNetwork6WithOptionalUnspecifiedTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, deleteSharedNetworkSubnets6Test) {
+    deleteSharedNetworkSubnets6Test();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, getAllSharedNetworks6Test) {
+    getAllSharedNetworks6Test();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, getAllSharedNetworks6SelectorsTest) {
+    getAllSharedNetworks6SelectorsTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, getAllSharedNetworks6WithServerTagsTest) {
+    getAllSharedNetworks6WithServerTagsTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, getModifiedSharedNetworks6Test) {
+    getModifiedSharedNetworks6Test();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, getModifiedSharedNetworks6SelectorsTest) {
+    getModifiedSharedNetworks6SelectorsTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, deleteSharedNetwork6Test) {
+    deleteSharedNetwork6Test();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, deleteSharedNetwork6SelectorsTest) {
+    deleteSharedNetwork6SelectorsTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, deleteAllSharedNetworks6SelectorsTest) {
+    deleteAllSharedNetworks6SelectorsTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, unassignedSharedNetworkTest) {
+    unassignedSharedNetworkTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, sharedNetworkLifetimeTest) {
+    sharedNetworkLifetimeTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, sharedNetworkOptionsTest) {
+    sharedNetworkOptionsTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, getOptionDef6Test) {
+    getOptionDef6Test();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, optionDefs6WithServerTagsTest) {
+    optionDefs6WithServerTagsTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, getAllOptionDefs6Test) {
+    getAllOptionDefs6Test();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, getModifiedOptionDefs6Test) {
+    getModifiedOptionDefs6Test();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, createUpdateDeleteOption6Test) {
+    createUpdateDeleteOption6Test();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, globalOptions6WithServerTagsTest) {
+    globalOptions6WithServerTagsTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, getAllOptions6Test) {
+    getAllOptions6Test();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, getModifiedOptions6Test) {
+    getModifiedOptions6Test();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, createUpdateDeleteSubnetOption6Test) {
+    createUpdateDeleteSubnetOption6Test();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, createUpdateDeletePoolOption6Test) {
+    createUpdateDeletePoolOption6Test();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, createUpdateDeletePdPoolOption6Test) {
+    createUpdateDeletePdPoolOption6Test();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, createUpdateDeleteSharedNetworkOption6Test) {
+    createUpdateDeleteSharedNetworkOption6Test();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, subnetOptionIdOrderTest) {
+    subnetOptionIdOrderTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, sharedNetworkOptionIdOrderTest) {
+    sharedNetworkOptionIdOrderTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, setAndGetAllClientClasses6Test) {
+    setAndGetAllClientClasses6Test();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, getClientClass6Test) {
+    getClientClass6Test();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, createUpdateClientClass6OptionsTest) {
+    createUpdateClientClass6OptionsTest();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, getModifiedClientClasses6Test) {
+    getModifiedClientClasses6Test();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, deleteClientClass6Test) {
+    deleteClientClass6Test();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, deleteAllClientClasses6Test) {
+    deleteAllClientClasses6Test();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, clientClassDependencies6Test) {
+    clientClassDependencies6Test();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6Test, multipleAuditEntriesTest) {
+    multipleAuditEntriesTest();
+}
+
+/// @brief Test fixture for verifying database connection loss-recovery
+/// behavior.
+class PgSqlConfigBackendDHCPv6DbLostCallbackTest : public GenericConfigBackendDbLostCallbackTest {
+public:
+    /// @brief Constructor
+    PgSqlConfigBackendDHCPv6DbLostCallbackTest() {};
+
+    /// @brief Destructor
+    virtual ~PgSqlConfigBackendDHCPv6DbLostCallbackTest() {};
+
+    /// @brief Creates the PostgreSQL CB schema.
+    virtual void createSchema() {
+        createPgSQLSchema();
+    }
+
+    /// @brief Destroys the PostgreSQL CB schema.
+    virtual void destroySchema() {
+        destroyPgSQLSchema();
+    }
+
+    /// @brief Method which returns a valid back end specific connection
+    /// string
+    virtual std::string validConnectionString() {
+        return (validPgSQLConnectionString());
+    }
+
+    /// @brief Method which returns an invalid back end specific connection
+    /// string.
+    virtual std::string invalidConnectionString() {
+        return (connectionString(PGSQL_VALID_TYPE, INVALID_NAME, VALID_HOST,
+                                 VALID_USER, VALID_PASSWORD));
+    }
+
+    /// @brief Registers PostgreSQL as a CB backend type.
+    virtual void registerBackendType() {
+        isc::dhcp::PgSqlConfigBackendDHCPv6::registerBackendType();
+    }
+
+    /// @brief Unregisters PostgreSQL as a CB backend type.
+    virtual void unregisterBackendType() {
+        isc::dhcp::PgSqlConfigBackendDHCPv6::unregisterBackendType();
+    }
+
+    /// @brief Sets the IOService instance in the CB implementation object.
+    ///
+    /// @param io_service pointer to the IOService instance to use. It may be
+    /// an empty pointer.
+    virtual void setConfigBackendImplIOService(isc::asiolink::IOServicePtr io_service) {
+        isc::dhcp::PgSqlConfigBackendImpl::setIOService(io_service);
+    }
+
+    /// @brief Attempts to add a backend instance to the CB manager.
+    ///
+    /// @param access Connection access string containing the database
+    /// connection parameters.
+    virtual void addBackend(const std::string& access) {
+        ConfigBackendDHCPv6Mgr::instance().addBackend(access);
+    }
+
+    /// @brief Fetches a collection of all the servers currently in
+    /// the CB database. This function is used to check the operability
+    /// of the CB backend.
+    ServerCollection getAllServers() {
+        return (ConfigBackendDHCPv6Mgr::instance().getPool()->getAllServers6(BackendSelector()));
+    }
+};
+
+TEST_F(PgSqlConfigBackendDHCPv6DbLostCallbackTest, testRetryOpenDbLostAndRecoveredCallback) {
+    MultiThreadingTest mt(false);
+    testRetryOpenDbLostAndRecoveredCallback();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6DbLostCallbackTest, testRetryOpenDbLostAndRecoveredCallbackMultiThreading) {
+    MultiThreadingTest mt(true);
+    testRetryOpenDbLostAndRecoveredCallback();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6DbLostCallbackTest, testRetryOpenDbLostAndFailedCallback) {
+    MultiThreadingTest mt(false);
+    testRetryOpenDbLostAndFailedCallback();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6DbLostCallbackTest, testRetryOpenDbLostAndFailedCallbackMultiThreading) {
+    MultiThreadingTest mt(true);
+    testRetryOpenDbLostAndFailedCallback();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6DbLostCallbackTest, testRetryOpenDbLostAndRecoveredAfterTimeoutCallback) {
+    MultiThreadingTest mt(false);
+    testRetryOpenDbLostAndRecoveredAfterTimeoutCallback();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6DbLostCallbackTest, testRetryOpenDbLostAndRecoveredAfterTimeoutCallbackMultiThreading) {
+    MultiThreadingTest mt(true);
+    testRetryOpenDbLostAndRecoveredAfterTimeoutCallback();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6DbLostCallbackTest, testRetryOpenDbLostAndFailedAfterTimeoutCallback) {
+    MultiThreadingTest mt(false);
+    testRetryOpenDbLostAndFailedAfterTimeoutCallback();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6DbLostCallbackTest, testRetryOpenDbLostAndFailedAfterTimeoutCallbackMultiThreading) {
+    MultiThreadingTest mt(true);
+    testRetryOpenDbLostAndFailedAfterTimeoutCallback();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6DbLostCallbackTest, testNoCallbackOnOpenFailure) {
+    MultiThreadingTest mt(false);
+    testNoCallbackOnOpenFailure();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6DbLostCallbackTest, testNoCallbackOnOpenFailureMultiThreading) {
+    MultiThreadingTest mt(true);
+    testNoCallbackOnOpenFailure();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6DbLostCallbackTest, testDbLostAndRecoveredCallback) {
+    MultiThreadingTest mt(false);
+    testDbLostAndRecoveredCallback();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6DbLostCallbackTest, testDbLostAndRecoveredCallbackMultiThreading) {
+    MultiThreadingTest mt(true);
+    testDbLostAndRecoveredCallback();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6DbLostCallbackTest, testDbLostAndFailedCallback) {
+    MultiThreadingTest mt(false);
+    testDbLostAndFailedCallback();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6DbLostCallbackTest, testDbLostAndFailedCallbackMultiThreading) {
+    MultiThreadingTest mt(true);
+    testDbLostAndFailedCallback();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6DbLostCallbackTest, testDbLostAndRecoveredAfterTimeoutCallback) {
+    MultiThreadingTest mt(false);
+    testDbLostAndRecoveredAfterTimeoutCallback();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6DbLostCallbackTest, testDbLostAndRecoveredAfterTimeoutCallbackMultiThreading) {
+    MultiThreadingTest mt(true);
+    testDbLostAndRecoveredAfterTimeoutCallback();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6DbLostCallbackTest, testDbLostAndFailedAfterTimeoutCallback) {
+    MultiThreadingTest mt(false);
+    testDbLostAndFailedAfterTimeoutCallback();
+}
+
+TEST_F(PgSqlConfigBackendDHCPv6DbLostCallbackTest, testDbLostAndFailedAfterTimeoutCallbackMultiThreading) {
+    MultiThreadingTest mt(true);
+    testDbLostAndFailedAfterTimeoutCallback();
+}
+
+}
diff --git a/src/hooks/dhcp/pgsql_cb/tests/pgsql_cb_impl_unittest.cc b/src/hooks/dhcp/pgsql_cb/tests/pgsql_cb_impl_unittest.cc
new file mode 100644
index 0000000..6e1d12e
--- /dev/null
+++ b/src/hooks/dhcp/pgsql_cb/tests/pgsql_cb_impl_unittest.cc
@@ -0,0 +1,80 @@
+// Copyright (C) 2021-2022 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 <dhcpsrv/testutils/pgsql_generic_backend_unittest.h>
+#include <pgsql/testutils/pgsql_schema.h>
+#include <testutils/gtest_utils.h>
+
+#include <gtest/gtest.h>
+#include <pgsql_cb_impl.h>
+#include <vector>
+
+using namespace isc::db;
+using namespace isc::dhcp;
+using namespace isc::dhcp::test;
+using namespace isc::util;
+
+namespace {
+
+class PgSqlConfigBackendTest : public PgSqlGenericBackendTest {
+public:
+    PgSqlConfigBackendTest() : PgSqlGenericBackendTest() {
+        createFullSchema();
+    }
+
+    /// @brief Setup for each test.
+    ///
+    /// Creates the configuration backend impl.
+    virtual void SetUp() {
+        DatabaseConnection::ParameterMap params;
+        params["name"] = "keatest";
+        params["password"] = "keatest";
+        params["user"] = "keatest";
+        ASSERT_NO_THROW_LOG(cbptr_.reset(new PgSqlConfigBackendImpl("", params, 0, 0)));
+    }
+
+    /// @brief Cleans up after each test.
+    ///
+    /// Destroys the configuration backend impl.
+    virtual void TearDown() {
+        ASSERT_NO_THROW_LOG(cbptr_.reset());
+    }
+
+    ~PgSqlConfigBackendTest() {
+        destroyFullSchema();
+    }
+
+    /// @brief creates full schema (slow!)
+    ///
+    /// If possible, use simpler, faster alternative: @ref createDummySchema();
+    /// Don't forget to tear it down with @ref destroyFullSchema();
+    void createFullSchema() {
+        // Create the actual full Kea schema.
+        isc::db::test::createPgSQLSchema();
+    }
+
+    /// @brief destroys the full schema (slow!)
+    ///
+    /// Don't forget to call this method once you're done, if you used @ref createFullSchema().
+    void destroyFullSchema() {
+        // Clean up after ourselves.
+        isc::db::test::destroyPgSQLSchema();
+    }
+
+    boost::shared_ptr<PgSqlConfigBackendImpl> cbptr_;
+};
+
+// Let's start with absolute basics.  This should construct a backend instance
+// connected to the unit test schema.  The backend instance is created in
+// Setup() and which will ASSERT on failures.
+TEST_F(PgSqlConfigBackendTest, constructor) {
+    //  Is this the right config backend type?
+    EXPECT_EQ("postgresql", cbptr_->getType());
+}
+
+}  // namespace
diff --git a/src/hooks/dhcp/pgsql_cb/tests/run_unittests.cc b/src/hooks/dhcp/pgsql_cb/tests/run_unittests.cc
new file mode 100644
index 0000000..74904a3
--- /dev/null
+++ b/src/hooks/dhcp/pgsql_cb/tests/run_unittests.cc
@@ -0,0 +1,20 @@
+// Copyright (C) 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 <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);
+}