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/database/tests
parent: Initial commit. (diff)
download: isc-kea-upstream.tar.xz
isc-kea-upstream.zip
10 files changed, 3607 insertions, 0 deletions
diff --git a/src/lib/database/tests/Makefile.am b/src/lib/database/tests/Makefile.am
new file mode 100644
index 0000000..f4cf4f0
--- /dev/null
+++ b/src/lib/database/tests/Makefile.am
@@ -0,0 +1,44 @@
+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/config/tests\"
+
+AM_CXXFLAGS = $(KEA_CXXFLAGS)
+
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+
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+
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+
+TESTS =
+if HAVE_GTEST
+TESTS += libdatabase_unittests
+
+libdatabase_unittests_SOURCES  = audit_entry_unittest.cc
+libdatabase_unittests_SOURCES += backend_selector_unittest.cc
+libdatabase_unittests_SOURCES += database_connection_unittest.cc
+libdatabase_unittests_SOURCES += database_log_unittest.cc
+libdatabase_unittests_SOURCES += dbaccess_parser_unittest.cc
+libdatabase_unittests_SOURCES += run_unittests.cc
+libdatabase_unittests_SOURCES += server_unittest.cc
+libdatabase_unittests_SOURCES += server_selector_unittest.cc
+
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+libdatabase_unittests_LDFLAGS = $(AM_LDFLAGS) $(GTEST_LDFLAGS)
+
+libdatabase_unittests_LDADD  = $(top_builddir)/src/lib/database/libkea-database.la
+libdatabase_unittests_LDADD += $(top_builddir)/src/lib/testutils/libkea-testutils.la
+libdatabase_unittests_LDADD += $(top_builddir)/src/lib/cc/libkea-cc.la
+libdatabase_unittests_LDADD += $(top_builddir)/src/lib/asiolink/libkea-asiolink.la
+libdatabase_unittests_LDADD += $(top_builddir)/src/lib/log/libkea-log.la
+libdatabase_unittests_LDADD += $(top_builddir)/src/lib/util/libkea-util.la
+libdatabase_unittests_LDADD += $(top_builddir)/src/lib/exceptions/libkea-exceptions.la
+libdatabase_unittests_LDADD += $(LOG4CPLUS_LIBS) $(BOOST_LIBS) $(GTEST_LDADD)
+
+endif
+
+noinst_PROGRAMS = $(TESTS)
diff --git a/src/lib/database/tests/Makefile.in b/src/lib/database/tests/Makefile.in
new file mode 100644
index 0000000..a1c7c64
--- /dev/null
+++ b/src/lib/database/tests/Makefile.in
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+	$(MAKE) $(AM_MAKEFLAGS) check-TESTS
+check: check-recursive
+all-am: Makefile $(PROGRAMS)
+installdirs: installdirs-recursive
+installdirs-am:
+install: install-recursive
+install-exec: install-exec-recursive
+install-data: install-data-recursive
+uninstall: uninstall-recursive
+
+install-am: all-am
+	@$(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)/libdatabase_unittests-audit_entry_unittest.Po
+	-rm -f ./$(DEPDIR)/libdatabase_unittests-backend_selector_unittest.Po
+	-rm -f ./$(DEPDIR)/libdatabase_unittests-database_connection_unittest.Po
+	-rm -f ./$(DEPDIR)/libdatabase_unittests-database_log_unittest.Po
+	-rm -f ./$(DEPDIR)/libdatabase_unittests-dbaccess_parser_unittest.Po
+	-rm -f ./$(DEPDIR)/libdatabase_unittests-run_unittests.Po
+	-rm -f ./$(DEPDIR)/libdatabase_unittests-server_selector_unittest.Po
+	-rm -f ./$(DEPDIR)/libdatabase_unittests-server_unittest.Po
+	-rm -f Makefile
+distclean-am: clean-am distclean-compile distclean-generic \
+	distclean-tags
+
+dvi: dvi-recursive
+
+dvi-am:
+
+html: html-recursive
+
+html-am:
+
+info: info-recursive
+
+info-am:
+
+install-data-am:
+
+install-dvi: install-dvi-recursive
+
+install-dvi-am:
+
+install-exec-am:
+
+install-html: install-html-recursive
+
+install-html-am:
+
+install-info: install-info-recursive
+
+install-info-am:
+
+install-man:
+
+install-pdf: install-pdf-recursive
+
+install-pdf-am:
+
+install-ps: install-ps-recursive
+
+install-ps-am:
+
+installcheck-am:
+
+maintainer-clean: maintainer-clean-recursive
+		-rm -f ./$(DEPDIR)/libdatabase_unittests-audit_entry_unittest.Po
+	-rm -f ./$(DEPDIR)/libdatabase_unittests-backend_selector_unittest.Po
+	-rm -f ./$(DEPDIR)/libdatabase_unittests-database_connection_unittest.Po
+	-rm -f ./$(DEPDIR)/libdatabase_unittests-database_log_unittest.Po
+	-rm -f ./$(DEPDIR)/libdatabase_unittests-dbaccess_parser_unittest.Po
+	-rm -f ./$(DEPDIR)/libdatabase_unittests-run_unittests.Po
+	-rm -f ./$(DEPDIR)/libdatabase_unittests-server_selector_unittest.Po
+	-rm -f ./$(DEPDIR)/libdatabase_unittests-server_unittest.Po
+	-rm -f Makefile
+maintainer-clean-am: distclean-am maintainer-clean-generic
+
+mostlyclean: mostlyclean-recursive
+
+mostlyclean-am: mostlyclean-compile mostlyclean-generic \
+	mostlyclean-libtool
+
+pdf: pdf-recursive
+
+pdf-am:
+
+ps: ps-recursive
+
+ps-am:
+
+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/lib/database/tests/audit_entry_unittest.cc b/src/lib/database/tests/audit_entry_unittest.cc
new file mode 100644
index 0000000..1d41872
--- /dev/null
+++ b/src/lib/database/tests/audit_entry_unittest.cc
@@ -0,0 +1,362 @@
+// Copyright (C) 2019-2020 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/audit_entry.h>
+#include <exceptions/exceptions.h>
+#include <boost/date_time/posix_time/posix_time.hpp>
+#include <boost/make_shared.hpp>
+#include <gtest/gtest.h>
+
+using namespace isc;
+using namespace isc::db;
+
+namespace {
+
+/// @brief Test fixture class for testing @c AuditEntry.
+class AuditEntryTest : public ::testing::Test {
+public:
+
+    /// @brief Constructor.
+    AuditEntryTest()
+        : fixed_time_(now()) {
+    }
+
+    /// @brief Returns current time.
+    static boost::posix_time::ptime now() {
+        return (boost::posix_time::microsec_clock::local_time());
+    }
+
+    /// @brief Returns always the same time value.
+    ///
+    /// The value is initialized when the test it started.
+    boost::posix_time::ptime fixedTime() const {
+        return (fixed_time_);
+    }
+
+    /// @brief Checks if the given time value is "close" to the
+    /// current time.
+    ///
+    /// This is useful in tests when the @c AuditEntry class sets the
+    /// modification time to a default value (in its constructor).
+    /// Because the test doesn't know the exact value to which the
+    /// modification time is set, it merely checks that this value
+    /// is earlier than current time and within the range of 1s.
+    ///
+    /// @param t time value to be checked.
+    bool almostEqualTime(const boost::posix_time::ptime& t) const {
+        auto current = now();
+
+        // The provided value must be a valid time.
+        if (t.is_not_a_date_time()) {
+            ADD_FAILURE() << "provided value is not a date time";
+            return (false);
+        }
+
+        // It must be earlier than current time.
+        if (t > current) {
+            ADD_FAILURE() << "provided time value is later than current time";
+            return (false);
+        }
+
+        // The difference must be lower than 1 second.
+        boost::posix_time::time_duration dur = current - t;
+        return (dur.total_milliseconds() < 1000);
+    }
+
+    /// @brief Fixed time value initialized in the constructor.
+    ///
+    /// This is used in tests that require the exact time values.
+    boost::posix_time::ptime fixed_time_;
+};
+
+// Checks that the modification time value can be cast to a number.
+TEST_F(AuditEntryTest, modificationType) {
+    EXPECT_EQ(0, static_cast<int>(AuditEntry::ModificationType::CREATE));
+    EXPECT_EQ(1, static_cast<int>(AuditEntry::ModificationType::UPDATE));
+    EXPECT_EQ(2, static_cast<int>(AuditEntry::ModificationType::DELETE));
+}
+
+// Checks that the audit entry can be created.
+TEST_F(AuditEntryTest, create) {
+
+    AuditEntryPtr audit_entry;
+
+    {
+        SCOPED_TRACE("create with modification time");
+
+        ASSERT_NO_THROW(audit_entry = AuditEntry::create
+                        ("dhcp4_subnet", 10, AuditEntry::ModificationType::DELETE,
+                         fixedTime(), 123, "deleted subnet 10"));
+        EXPECT_EQ("dhcp4_subnet", audit_entry->getObjectType());
+        EXPECT_EQ(10, audit_entry->getObjectId());
+        EXPECT_EQ(AuditEntry::ModificationType::DELETE, audit_entry->getModificationType());
+        EXPECT_EQ(fixedTime(), audit_entry->getModificationTime());
+        EXPECT_EQ(123, audit_entry->getRevisionId());
+        EXPECT_EQ("deleted subnet 10", audit_entry->getLogMessage());
+    }
+
+    {
+        SCOPED_TRACE("create with default modification time");
+
+        ASSERT_NO_THROW(audit_entry = AuditEntry::create
+                        ("dhcp4_option", 123, AuditEntry::ModificationType::CREATE,
+                         234, ""));
+        EXPECT_EQ("dhcp4_option", audit_entry->getObjectType());
+        EXPECT_EQ(123, audit_entry->getObjectId());
+        EXPECT_EQ(AuditEntry::ModificationType::CREATE, audit_entry->getModificationType());
+        EXPECT_TRUE(almostEqualTime(audit_entry->getModificationTime()));
+        EXPECT_EQ(234, audit_entry->getRevisionId());
+        EXPECT_TRUE(audit_entry->getLogMessage().empty());
+    }
+}
+
+// Checks that invalid values for the audit entry are rejected.
+TEST_F(AuditEntryTest, createFailures) {
+    {
+        SCOPED_TRACE("empty object type");
+        EXPECT_THROW(AuditEntry("", 10, AuditEntry::ModificationType::DELETE,
+                                fixedTime(), 123, "deleted subnet 10"),
+                     BadValue);
+    }
+
+    {
+        SCOPED_TRACE("not a date time");
+        EXPECT_THROW(AuditEntry("dhcp4_subnet", 10,
+                                AuditEntry::ModificationType::DELETE,
+                                boost::posix_time::ptime(), 123,
+                                "deleted subnet 10"),
+                     BadValue);
+    }
+}
+
+/// @brief Test fixture class for testing @c AuditEntryCollection.
+class AuditEntryCollectionTest : public AuditEntryTest {
+public:
+
+    /// @brief Constructor.
+    ///
+    /// Creates a collection of audit entries used in the tests.
+    AuditEntryCollectionTest()
+        : AuditEntryTest(), audit_entries_() {
+        createTestAuditEntries();
+    }
+
+    /// @brief Returns a time value being being a specified number of
+    /// seconds later or earlier than the time returned by @c fixedTime.
+    ///
+    /// @param secs offset in seconds since the @c fixedTime output. If
+    /// the parameter is negative, the returned time is earlier than the
+    /// fixed time. Otherwise, it is later than fixed time.
+    boost::posix_time::ptime diffTime(const long secs) {
+        if (secs < 0) {
+            return (fixedTime() - boost::posix_time::seconds(-secs));
+        }
+        return (fixedTime() + boost::posix_time::seconds(secs));
+    }
+
+    /// @brief Creates an @c AuditEntry instance and inserts it to
+    /// the @c audit_entries_ collection.
+    ///
+    /// @tparam Args types of the arguments to be passed to the @c AuditEntry
+    /// constructors.
+    /// @param args arguments to be passed to the @c AuditEntry constructors.
+    template<typename... Args>
+    void create(Args&& ...args) {
+        audit_entries_.insert(boost::make_shared<AuditEntry>(args...));
+    }
+
+    /// @brief Creates a collection of @c AuditEntry objects to be used by
+    /// the tests.
+    void createTestAuditEntries() {
+        create("dhcp4_subnet", 10, AuditEntry::ModificationType::CREATE,
+               diffTime(-5), 100, "added subnet 10");
+        create("dhcp4_shared_network", 1, AuditEntry::ModificationType::CREATE,
+               diffTime(-5), 110, "added shared network 1");
+        create("dhcp4_shared_network", 120, AuditEntry::ModificationType::UPDATE,
+               diffTime(-8), 90, "updated shared network 120");
+        create("dhcp4_subnet", 120, AuditEntry::ModificationType::DELETE,
+               diffTime(8), 130, "deleted subnet 120");
+        create("dhcp4_subnet", 1000, AuditEntry::ModificationType::CREATE,
+               diffTime(4), 120, "created subnet 1000");
+        create("dhcp4_option", 15, AuditEntry::ModificationType::UPDATE,
+               diffTime(16), 140, "updated option 15");
+    }
+
+    /// @brief Checks if the returned results range contains an @c AuditEntry
+    /// with a given object type and identifier.
+    ///
+    /// @param object_type expected object type.
+    /// @param object_id expected object id.
+    /// @param begin beginning of the results range to be examined.
+    /// @param end end of the results range to be examined.
+    template<typename Iterator>
+    bool includes(const std::string& object_type, const uint64_t object_id,
+                  Iterator begin, Iterator end) {
+        // Iterate over the results range and look for the entry.
+        for (auto it = begin; it != end; ++it) {
+            if (((*it)->getObjectType() == object_type) &&
+                ((*it)->getObjectId() == object_id)) {
+                // Entry found.
+                return (true);
+            }
+        }
+
+        // Entry not found.
+        return (false);
+    }
+
+    /// @brief Checks if the returned results range contains an @c AuditEntry
+    /// with a given object and modification types, and object identifier.
+    ///
+    /// @param object_type expected object type.
+    /// @param object_id expected object id.
+    /// @param modification_type expected modification type.
+    /// @param begin beginning of the results range to be examined.
+    /// @param end end of the results range to be examined.
+    template<typename Iterator>
+    bool includes(const std::string& object_type, const uint64_t object_id,
+                  const AuditEntry::ModificationType& modification_type,
+                  Iterator begin, Iterator end) {
+        // Iterate over the results range and look for the entry.
+        for (auto it = begin; it != end; ++it) {
+            if (((*it)->getObjectType() == object_type) &&
+                ((*it)->getObjectId() == object_id) &&
+                ((*it)->getModificationType() == modification_type)) {
+                // Entry found.
+                return (true);
+            }
+        }
+
+        // Entry not found.
+        return (false);
+    }
+
+    /// @brief Audit entries used in the tests.
+    AuditEntryCollection audit_entries_;
+
+};
+
+// Checks that entries can be found by object type.
+TEST_F(AuditEntryCollectionTest, getByObjectType) {
+    const auto& object_type_idx = audit_entries_.get<AuditEntryObjectTypeTag>();
+
+    // Search for "dhcp4_subnet" objects.
+    auto range = object_type_idx.equal_range("dhcp4_subnet");
+    ASSERT_EQ(3, std::distance(range.first, range.second));
+    EXPECT_TRUE(includes("dhcp4_subnet", 10, range.first, range.second));
+    EXPECT_TRUE(includes("dhcp4_subnet", 120, range.first, range.second));
+    EXPECT_TRUE(includes("dhcp4_subnet", 1000, range.first, range.second));
+
+    // Search for "dhcp4_shared_network" objects.
+    range = object_type_idx.equal_range("dhcp4_shared_network");
+    ASSERT_EQ(2, std::distance(range.first, range.second));
+    EXPECT_TRUE(includes("dhcp4_shared_network", 1, range.first, range.second));
+    EXPECT_TRUE(includes("dhcp4_shared_network", 120, range.first, range.second));
+
+    // Search for "dhcp4_option" objects.
+    range = object_type_idx.equal_range("dhcp4_option");
+    ASSERT_EQ(1, std::distance(range.first, range.second));
+    EXPECT_TRUE(includes("dhcp4_option", 15, range.first, range.second));
+}
+
+// Checks that entries can be found by modification time.
+TEST_F(AuditEntryCollectionTest, getByModificationTime) {
+    const auto& mod_time_idx = audit_entries_.get<AuditEntryModificationTimeIdTag>();
+
+    // Search for objects later than fixed time - 10s.
+    auto lb = mod_time_idx.lower_bound(diffTime(-10));
+    ASSERT_EQ(6, std::distance(lb, mod_time_idx.end()));
+    EXPECT_TRUE(includes("dhcp4_subnet", 10, lb, mod_time_idx.end()));
+    EXPECT_TRUE(includes("dhcp4_subnet", 120, lb, mod_time_idx.end()));
+    EXPECT_TRUE(includes("dhcp4_subnet", 1000, lb, mod_time_idx.end()));
+    EXPECT_TRUE(includes("dhcp4_shared_network", 1, lb, mod_time_idx.end()));
+    EXPECT_TRUE(includes("dhcp4_shared_network", 120, lb, mod_time_idx.end()));
+    EXPECT_TRUE(includes("dhcp4_option", 15, lb, mod_time_idx.end()));
+
+    // Search for objects later than fixed time - 7s.
+    lb = mod_time_idx.lower_bound(diffTime(-7));
+    ASSERT_EQ(5, std::distance(lb, mod_time_idx.end()));
+    EXPECT_TRUE(includes("dhcp4_subnet", 10, lb, mod_time_idx.end()));
+    EXPECT_TRUE(includes("dhcp4_subnet", 120, lb, mod_time_idx.end()));
+    EXPECT_TRUE(includes("dhcp4_subnet", 1000, lb, mod_time_idx.end()));
+    EXPECT_TRUE(includes("dhcp4_shared_network", 1, lb, mod_time_idx.end()));
+    EXPECT_TRUE(includes("dhcp4_option", 15, lb, mod_time_idx.end()));
+
+    // Search for objects later than fixed time - 1s.
+    lb = mod_time_idx.lower_bound(diffTime(-1));
+    ASSERT_EQ(3, std::distance(lb, mod_time_idx.end()));
+    EXPECT_TRUE(includes("dhcp4_subnet", 120, lb, mod_time_idx.end()));
+    EXPECT_TRUE(includes("dhcp4_subnet", 1000, lb, mod_time_idx.end()));
+    EXPECT_TRUE(includes("dhcp4_option", 15, lb, mod_time_idx.end()));
+
+    // Search for objects later than fixed time + 6s.
+    lb = mod_time_idx.lower_bound(diffTime(6));
+    ASSERT_EQ(2, std::distance(lb, mod_time_idx.end()));
+    EXPECT_TRUE(includes("dhcp4_subnet", 120, lb, mod_time_idx.end()));
+    EXPECT_TRUE(includes("dhcp4_option", 15, lb, mod_time_idx.end()));
+
+    // Search for objects later than fixed time + 10s.
+    lb = mod_time_idx.lower_bound(diffTime(10));
+    ASSERT_EQ(1, std::distance(lb, mod_time_idx.end()));
+    EXPECT_TRUE(includes("dhcp4_option", 15, lb, mod_time_idx.end()));
+
+    // Search for objects later than fixed time + 20s.
+    lb = mod_time_idx.lower_bound(diffTime(20));
+    // None found.
+    ASSERT_EQ(0, std::distance(lb, mod_time_idx.end()));
+}
+
+// Checks that entries can be found by modification time and id.
+TEST_F(AuditEntryCollectionTest, getByModificationTimeAndId) {
+    const auto& mod_time_idx = audit_entries_.get<AuditEntryModificationTimeIdTag>();
+
+    // Search for objects later than added added subnet 10.
+    auto mod = boost::make_tuple(diffTime(-5), 100 + 1);
+    auto lb = mod_time_idx.lower_bound(mod);
+    ASSERT_EQ(4, std::distance(lb, mod_time_idx.end()));
+    EXPECT_TRUE(includes("dhcp4_subnet", 120, lb, mod_time_idx.end()));
+    EXPECT_TRUE(includes("dhcp4_subnet", 1000, lb, mod_time_idx.end()));
+    EXPECT_TRUE(includes("dhcp4_shared_network", 1, lb, mod_time_idx.end()));
+    EXPECT_TRUE(includes("dhcp4_option", 15, lb, mod_time_idx.end()));
+
+    // Check the order is time first, id after.
+    create("dhcp4_subnet", 1000, AuditEntry::ModificationType::UPDATE,
+           diffTime(-8), 200, "updated subnet 1000");
+    lb = mod_time_idx.lower_bound(mod);
+    ASSERT_EQ(4, std::distance(lb, mod_time_idx.end()));
+    EXPECT_TRUE(includes("dhcp4_subnet", 120, lb, mod_time_idx.end()));
+    EXPECT_TRUE(includes("dhcp4_subnet", 1000, lb, mod_time_idx.end()));
+    EXPECT_TRUE(includes("dhcp4_shared_network", 1, lb, mod_time_idx.end()));
+    EXPECT_TRUE(includes("dhcp4_option", 15, lb, mod_time_idx.end()));
+}
+
+// Checks that entries can be found by object id.
+TEST_F(AuditEntryCollectionTest, getByObjectId) {
+    const auto& object_id_idx = audit_entries_.get<AuditEntryObjectIdTag>();
+
+    // Search for object id 10.
+    auto range = object_id_idx.equal_range(10);
+    ASSERT_EQ(1, std::distance(range.first, range.second));
+    EXPECT_TRUE(includes("dhcp4_subnet", 10, range.first, range.second));
+
+    // Add another entry.
+    create("dhcp4_subnet", 10, AuditEntry::ModificationType::UPDATE,
+           diffTime(0), 111, "updated subnet 10");
+
+    // Now search should return two entries.
+    range =  object_id_idx.equal_range(10);
+    ASSERT_EQ(2, std::distance(range.first, range.second));
+    EXPECT_TRUE(includes("dhcp4_subnet", 10,
+                         AuditEntry::ModificationType::CREATE,
+                         range.first, range.second));
+    EXPECT_TRUE(includes("dhcp4_subnet", 10,
+                         AuditEntry::ModificationType::UPDATE,
+                         range.first, range.second));
+}
+
+}
diff --git a/src/lib/database/tests/backend_selector_unittest.cc b/src/lib/database/tests/backend_selector_unittest.cc
new file mode 100644
index 0000000..d66ca78
--- /dev/null
+++ b/src/lib/database/tests/backend_selector_unittest.cc
@@ -0,0 +1,197 @@
+// Copyright (C) 2018-2022 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/backend_selector.h>
+#include <testutils/test_to_element.h>
+#include <boost/scoped_ptr.hpp>
+#include <gtest/gtest.h>
+
+using namespace isc;
+using namespace isc::db;
+using namespace isc::data;
+
+namespace {
+
+// Verifies defaults of the backend selector.
+TEST(BackendSelectorTest, defaults) {
+    BackendSelector sel;
+    EXPECT_EQ(BackendSelector::Type::UNSPEC, sel.getBackendType());
+    EXPECT_TRUE(sel.getBackendHost().empty());
+    EXPECT_EQ(0, sel.getBackendPort());
+    EXPECT_TRUE(sel.amUnspecified());
+    EXPECT_EQ("unspecified", sel.toText());
+}
+
+// Verifies that the backend selector can be set to "unspecified".
+TEST(BackendSelectorTest, unspec) {
+    BackendSelector sel = BackendSelector::UNSPEC();
+    EXPECT_EQ(BackendSelector::Type::UNSPEC, sel.getBackendType());
+    EXPECT_TRUE(sel.getBackendHost().empty());
+    EXPECT_EQ(0, sel.getBackendPort());
+    EXPECT_TRUE(sel.amUnspecified());
+    EXPECT_EQ("unspecified", sel.toText());
+}
+
+// Verifies that it is possible to select backend by type.
+TEST(BackendSelectorTest, backendTypeSpec) {
+    boost::scoped_ptr<BackendSelector> sel;
+    ASSERT_NO_THROW(
+        sel.reset(new BackendSelector(BackendSelector::Type::MYSQL))
+    );
+    EXPECT_EQ(BackendSelector::Type::MYSQL, sel->getBackendType());
+    EXPECT_TRUE(sel->getBackendHost().empty());
+    EXPECT_EQ(0, sel->getBackendPort());
+    EXPECT_FALSE(sel->amUnspecified());
+    EXPECT_EQ("type=mysql", sel->toText());
+}
+
+// Verifies that backend can be selected by host and port.
+TEST(BackendSelectorTest, backendHostPortSpec) {
+    boost::scoped_ptr<BackendSelector> sel;
+    ASSERT_NO_THROW(
+        sel.reset(new BackendSelector("myhost", 1234))
+    );
+    EXPECT_EQ(BackendSelector::Type::UNSPEC, sel->getBackendType());
+    EXPECT_EQ("myhost", sel->getBackendHost());
+    EXPECT_EQ(1234, sel->getBackendPort());
+    EXPECT_FALSE(sel->amUnspecified());
+    EXPECT_EQ("host=myhost,port=1234", sel->toText());
+}
+
+// Verifies that backend can be selected by host.
+TEST(BackendSelectorTest, backendHostSpec) {
+    boost::scoped_ptr<BackendSelector> sel;
+    ASSERT_NO_THROW(
+        sel.reset(new BackendSelector("otherhost"))
+    );
+    EXPECT_EQ(BackendSelector::Type::UNSPEC, sel->getBackendType());
+    EXPECT_EQ("otherhost", sel->getBackendHost());
+    EXPECT_EQ(0, sel->getBackendPort());
+    EXPECT_FALSE(sel->amUnspecified());
+    EXPECT_EQ("host=otherhost", sel->toText());
+}
+
+// Verifies that backend becomes unspecified if the access
+// map is empty.
+TEST(BackendSelectorTest, accessMapTypeUnSpec) {
+    ElementPtr access_map = Element::createMap();
+    boost::scoped_ptr<BackendSelector> sel;
+    ASSERT_NO_THROW(
+        sel.reset(new BackendSelector(access_map))
+    );
+    EXPECT_EQ(BackendSelector::Type::UNSPEC, sel->getBackendType());
+    EXPECT_TRUE(sel->getBackendHost().empty());
+    EXPECT_EQ(0, sel->getBackendPort());
+    EXPECT_TRUE(sel->amUnspecified());
+    EXPECT_EQ("unspecified", sel->toText());
+}
+
+// Verifies that backend can be selected by type using access map.
+TEST(BackendSelectorTest, accessMapTypeSpec) {
+    ElementPtr access_map = Element::createMap();
+    access_map->set("type", Element::create("mysql"));
+    boost::scoped_ptr<BackendSelector> sel;
+    ASSERT_NO_THROW(
+        sel.reset(new BackendSelector(access_map))
+    );
+    EXPECT_EQ(BackendSelector::Type::MYSQL, sel->getBackendType());
+    EXPECT_TRUE(sel->getBackendHost().empty());
+    EXPECT_EQ(0, sel->getBackendPort());
+    EXPECT_FALSE(sel->amUnspecified());
+    EXPECT_EQ("type=mysql", sel->toText());
+}
+
+// Verifies that backend can be selected by host and port using
+// access map.
+TEST(BackendSelectorTest, accessMapHostPortSpec) {
+    ElementPtr access_map = Element::createMap();
+    access_map->set("host", Element::create("myhost"));
+    access_map->set("port", Element::create(int64_t(1234)));
+    boost::scoped_ptr<BackendSelector> sel;
+    ASSERT_NO_THROW(
+        sel.reset(new BackendSelector(access_map))
+    );
+    EXPECT_EQ(BackendSelector::Type::UNSPEC, sel->getBackendType());
+    EXPECT_EQ("myhost", sel->getBackendHost());
+    EXPECT_EQ(1234, sel->getBackendPort());
+    EXPECT_FALSE(sel->amUnspecified());
+    EXPECT_EQ("host=myhost,port=1234", sel->toText());
+}
+
+// Verifies that the backend can be selected by host using access
+// map.
+TEST(BackendSelectorTest, accessMapHostSpec) {
+    ElementPtr access_map = Element::createMap();
+    access_map->set("host", Element::create("myhost"));
+    boost::scoped_ptr<BackendSelector> sel;
+    ASSERT_NO_THROW(
+        sel.reset(new BackendSelector(access_map))
+    );
+    EXPECT_EQ(BackendSelector::Type::UNSPEC, sel->getBackendType());
+    EXPECT_EQ("myhost", sel->getBackendHost());
+    EXPECT_EQ(0, sel->getBackendPort());
+    EXPECT_FALSE(sel->amUnspecified());
+    EXPECT_EQ("host=myhost", sel->toText());
+}
+
+// Verifies that selecting backend by port only is not possible.
+TEST(BackendSelectorTest, accessMapPortSpec) {
+    ElementPtr access_map = Element::createMap();
+    access_map->set("port", Element::create(int64_t(1234)));
+    boost::scoped_ptr<BackendSelector> sel;
+    EXPECT_THROW(sel.reset(new BackendSelector(access_map)),
+                 BadValue);
+}
+
+// Tests conversions of strings to backend types.
+TEST(BackendSelectorTest, stringToBackendType) {
+    EXPECT_EQ(BackendSelector::Type::MYSQL,
+              BackendSelector::stringToBackendType("mysql"));
+    EXPECT_EQ(BackendSelector::Type::POSTGRESQL,
+              BackendSelector::stringToBackendType("postgresql"));
+    EXPECT_THROW(BackendSelector::stringToBackendType("unsupported"),
+                 BadValue);
+}
+
+// Tests conversions of backend types to strings.
+TEST(BackendSelectorTest, backendTypeToString) {
+    EXPECT_EQ("mysql",
+              BackendSelector::backendTypeToString(BackendSelector::Type::MYSQL));
+    EXPECT_EQ("postgresql",
+              BackendSelector::backendTypeToString(BackendSelector::Type::POSTGRESQL));
+}
+
+// Tests toElement from backend selectors.
+TEST(BackendSelectorTest, backendToElement) {
+    // Unspecified.
+    boost::scoped_ptr<BackendSelector> sel(new BackendSelector());
+    EXPECT_THROW(sel->toElement(), BadValue);
+
+    // Unspecified type.
+    sel.reset(new BackendSelector("myhost", 1234));
+    EXPECT_THROW(sel->toElement(), BadValue);
+
+    // Type only.
+    EXPECT_NO_THROW(sel.reset(new BackendSelector(BackendSelector::Type::MYSQL)));
+    ElementPtr expected = Element::createMap();
+    expected->set("type", Element::create("mysql"));
+    test::runToElementTest<BackendSelector>(expected, *sel);
+
+    // Add host.
+    expected->set("host", Element::create("myhost"));
+    EXPECT_NO_THROW(sel.reset(new BackendSelector(expected)));
+    test::runToElementTest<BackendSelector>(expected, *sel);
+
+    // Add port.
+    expected->set("port", Element::create(1234L));
+    EXPECT_NO_THROW(sel.reset(new BackendSelector(expected)));
+    test::runToElementTest<BackendSelector>(expected, *sel);
+}
+
+}
+
diff --git a/src/lib/database/tests/database_connection_unittest.cc b/src/lib/database/tests/database_connection_unittest.cc
new file mode 100644
index 0000000..b34f2e8
--- /dev/null
+++ b/src/lib/database/tests/database_connection_unittest.cc
@@ -0,0 +1,643 @@
+// Copyright (C) 2015-2023 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 <cc/cfg_to_element.h>
+#include <cc/data.h>
+#include <database/database_connection.h>
+#include <database/dbaccess_parser.h>
+#include <exceptions/exceptions.h>
+#include <gtest/gtest.h>
+
+#include <functional>
+
+using namespace isc::data;
+using namespace isc::db;
+using namespace isc::util;
+namespace ph = std::placeholders;
+
+/// @brief Test fixture for exercising DbLostCallback invocation
+class DatabaseConnectionCallbackTest : public ::testing::Test {
+public:
+    /// Constructor
+    DatabaseConnectionCallbackTest()
+        : db_reconnect_ctl_(0) {
+        DatabaseConnection::db_lost_callback_ = 0;
+        DatabaseConnection::db_recovered_callback_ = 0;
+        DatabaseConnection::db_failed_callback_ = 0;
+    }
+
+    /// Destructor
+    ~DatabaseConnectionCallbackTest() {
+        DatabaseConnection::db_lost_callback_ = 0;
+        DatabaseConnection::db_recovered_callback_ = 0;
+        DatabaseConnection::db_failed_callback_ = 0;
+    }
+
+    /// @brief Callback to register with a DatabaseConnection
+    ///
+    /// @param db_reconnect_ctl ReconnectCtl containing reconnect
+    /// parameters
+    bool dbLostCallback(ReconnectCtlPtr db_reconnect_ctl) {
+        if (!db_reconnect_ctl) {
+            isc_throw(isc::BadValue, "db_reconnect_ctl should not be null");
+        }
+
+        db_reconnect_ctl_ = db_reconnect_ctl;
+        return (true);
+    }
+
+    /// @brief Callback to register with a DatabaseConnection
+    ///
+    /// @param db_reconnect_ctl ReconnectCtl containing reconnect
+    /// parameters
+    bool dbRecoveredCallback(ReconnectCtlPtr db_reconnect_ctl) {
+        if (!db_reconnect_ctl) {
+            isc_throw(isc::BadValue, "db_reconnect_ctl should not be null");
+        }
+
+        db_reconnect_ctl_ = db_reconnect_ctl;
+        db_reconnect_ctl_->resetRetries();
+        return (true);
+    }
+
+    /// @brief Callback to register with a DatabaseConnection
+    ///
+    /// @param db_reconnect_ctl ReconnectCtl containing reconnect
+    /// parameters
+    bool dbFailedCallback(ReconnectCtlPtr db_reconnect_ctl) {
+        if (!db_reconnect_ctl) {
+            isc_throw(isc::BadValue, "db_reconnect_ctl should not be null");
+        }
+
+        db_reconnect_ctl_ = db_reconnect_ctl;
+        db_reconnect_ctl_->resetRetries();
+        return (false);
+    }
+
+    /// @brief Retainer for the control passed into the callback
+    ReconnectCtlPtr db_reconnect_ctl_;
+};
+
+/// @brief getParameter test
+///
+/// This test checks if the LeaseMgr can be instantiated and that it
+/// parses parameters string properly.
+TEST(DatabaseConnectionTest, getParameter) {
+
+    DatabaseConnection::ParameterMap pmap;
+    pmap[std::string("param1")] = std::string("value1");
+    pmap[std::string("param2")] = std::string("value2");
+    DatabaseConnection datasrc(pmap);
+
+    EXPECT_EQ("value1", datasrc.getParameter("param1"));
+    EXPECT_EQ("value2", datasrc.getParameter("param2"));
+    EXPECT_THROW(datasrc.getParameter("param3"), isc::BadValue);
+}
+
+/// @brief NoDbLostCallback
+///
+/// This test verifies that DatabaseConnection::invokeDbLostCallback
+/// returns false if the connection has no registered DbLostCallback.
+TEST_F(DatabaseConnectionCallbackTest, NoDbLostCallback) {
+    DatabaseConnection::ParameterMap pmap;
+    pmap[std::string("type")] = std::string("test");
+    pmap[std::string("max-reconnect-tries")] = std::string("3");
+    pmap[std::string("reconnect-wait-time")] = std::string("60000");
+    DatabaseConnection datasrc(pmap);
+    datasrc.makeReconnectCtl("timer");
+
+    bool ret = false;
+    ASSERT_NO_THROW(ret = DatabaseConnection::invokeDbLostCallback(datasrc.reconnectCtl()));
+    EXPECT_FALSE(ret);
+    EXPECT_FALSE(db_reconnect_ctl_);
+}
+
+/// @brief NoDbRecoveredCallback
+///
+/// This test verifies that DatabaseConnection::invokeDbRecoveredCallback
+/// returns false if the connection has no registered DbRecoveredCallback.
+TEST_F(DatabaseConnectionCallbackTest, NoDbRecoveredCallback) {
+    DatabaseConnection::ParameterMap pmap;
+    pmap[std::string("type")] = std::string("test");
+    pmap[std::string("max-reconnect-tries")] = std::string("3");
+    pmap[std::string("reconnect-wait-time")] = std::string("60000");
+    DatabaseConnection datasrc(pmap);
+    datasrc.makeReconnectCtl("timer");
+
+    bool ret = false;
+    ASSERT_NO_THROW(ret = DatabaseConnection::invokeDbRecoveredCallback(datasrc.reconnectCtl()));
+    EXPECT_FALSE(ret);
+    EXPECT_FALSE(db_reconnect_ctl_);
+}
+
+/// @brief NoDbFailedCallback
+///
+/// This test verifies that DatabaseConnection::invokeDbFailedCallback
+/// returns false if the connection has no registered DbFailedCallback.
+TEST_F(DatabaseConnectionCallbackTest, NoDbFailedCallback) {
+    DatabaseConnection::ParameterMap pmap;
+    pmap[std::string("type")] = std::string("test");
+    pmap[std::string("max-reconnect-tries")] = std::string("3");
+    pmap[std::string("reconnect-wait-time")] = std::string("60000");
+    DatabaseConnection datasrc(pmap);
+    datasrc.makeReconnectCtl("timer");
+
+    bool ret = false;
+    ASSERT_NO_THROW(ret = DatabaseConnection::invokeDbFailedCallback(datasrc.reconnectCtl()));
+    EXPECT_FALSE(ret);
+    EXPECT_FALSE(db_reconnect_ctl_);
+}
+
+/// @brief dbLostCallback
+///
+/// This test verifies that DatabaseConnection::invokeDbLostCallback
+/// safely invokes the registered DbCallback.  It also tests
+/// operation of DbReconnectCtl retry accounting methods.
+TEST_F(DatabaseConnectionCallbackTest, dbLostCallback) {
+    /// Create a Database configuration that includes the reconnect
+    /// control parameters.
+    DatabaseConnection::ParameterMap pmap;
+    pmap[std::string("type")] = std::string("test");
+    pmap[std::string("max-reconnect-tries")] = std::string("3");
+    pmap[std::string("reconnect-wait-time")] = std::string("60000");
+
+    /// Install the callback.
+    DatabaseConnection::db_lost_callback_ =
+        std::bind(&DatabaseConnectionCallbackTest::dbLostCallback, this, ph::_1);
+    /// Create the connection..
+    DatabaseConnection datasrc(pmap);
+    datasrc.makeReconnectCtl("timer");
+    bool ret = false;
+
+    /// We should be able to invoke the callback and get
+    /// the correct reconnect control parameters from it.
+    ASSERT_NO_THROW(ret = DatabaseConnection::invokeDbLostCallback(datasrc.reconnectCtl()));
+    EXPECT_TRUE(ret);
+    ASSERT_TRUE(db_reconnect_ctl_);
+    ASSERT_EQ("test", db_reconnect_ctl_->backendType());
+    ASSERT_EQ("timer", db_reconnect_ctl_->timerName());
+    ASSERT_EQ(3, db_reconnect_ctl_->maxRetries());
+    ASSERT_EQ(3, db_reconnect_ctl_->retriesLeft());
+    EXPECT_EQ(60000, db_reconnect_ctl_->retryInterval());
+
+    /// Verify that checkRetries() correctly decrements
+    /// down to zero, and that retriesLeft() returns
+    /// the correct value.
+    for (int i = 3; i > 1 ; --i) {
+        ASSERT_EQ(i, db_reconnect_ctl_->retriesLeft());
+        ASSERT_TRUE(db_reconnect_ctl_->checkRetries());
+    }
+
+    /// Retries are exhausted, verify that's reflected.
+    EXPECT_FALSE(db_reconnect_ctl_->checkRetries());
+    EXPECT_EQ(0, db_reconnect_ctl_->retriesLeft());
+    EXPECT_EQ(3, db_reconnect_ctl_->maxRetries());
+}
+
+/// @brief dbRecoveredCallback
+///
+/// This test verifies that DatabaseConnection::invokeDbRecoveredCallback
+/// safely invokes the registered DbRecoveredCallback.  It also tests
+/// operation of DbReconnectCtl retry reset method.
+TEST_F(DatabaseConnectionCallbackTest, dbRecoveredCallback) {
+    /// Create a Database configuration that includes the reconnect
+    /// control parameters.
+    DatabaseConnection::ParameterMap pmap;
+    pmap[std::string("type")] = std::string("test");
+    pmap[std::string("max-reconnect-tries")] = std::string("3");
+    pmap[std::string("reconnect-wait-time")] = std::string("60000");
+
+    /// Install the callback.
+    DatabaseConnection::db_lost_callback_ =
+        std::bind(&DatabaseConnectionCallbackTest::dbLostCallback, this, ph::_1);
+    DatabaseConnection::db_recovered_callback_ =
+        std::bind(&DatabaseConnectionCallbackTest::dbRecoveredCallback, this, ph::_1);
+    /// Create the connection..
+    DatabaseConnection datasrc(pmap);
+    datasrc.makeReconnectCtl("timer");
+    bool ret = false;
+
+    /// We should be able to invoke the callback and get
+    /// the correct reconnect control parameters from it.
+    ASSERT_NO_THROW(ret = DatabaseConnection::invokeDbLostCallback(datasrc.reconnectCtl()));
+    EXPECT_TRUE(ret);
+    ASSERT_TRUE(db_reconnect_ctl_);
+    ASSERT_EQ("test", db_reconnect_ctl_->backendType());
+    ASSERT_EQ("timer", db_reconnect_ctl_->timerName());
+    ASSERT_EQ(3, db_reconnect_ctl_->maxRetries());
+    ASSERT_EQ(3, db_reconnect_ctl_->retriesLeft());
+    EXPECT_EQ(60000, db_reconnect_ctl_->retryInterval());
+
+    /// Verify that checkRetries() correctly decrements
+    /// down to zero, and that retriesLeft() returns
+    /// the correct value.
+    for (int i = 3; i > 1 ; --i) {
+        ASSERT_EQ(i, db_reconnect_ctl_->retriesLeft());
+        ASSERT_TRUE(db_reconnect_ctl_->checkRetries());
+    }
+
+    /// Retries are exhausted, verify that's reflected.
+    EXPECT_FALSE(db_reconnect_ctl_->checkRetries());
+    EXPECT_EQ(0, db_reconnect_ctl_->retriesLeft());
+    EXPECT_EQ(3, db_reconnect_ctl_->maxRetries());
+
+    /// Reset the reconnect ctl object to verify that it is set again.
+    db_reconnect_ctl_.reset();
+
+    /// We should be able to invoke the callback and get
+    /// the correct reconnect control parameters from it.
+    ASSERT_NO_THROW(ret = DatabaseConnection::invokeDbRecoveredCallback(datasrc.reconnectCtl()));
+    EXPECT_TRUE(ret);
+    ASSERT_TRUE(db_reconnect_ctl_);
+    ASSERT_EQ("test", db_reconnect_ctl_->backendType());
+    ASSERT_EQ("timer", db_reconnect_ctl_->timerName());
+    EXPECT_EQ(60000, db_reconnect_ctl_->retryInterval());
+
+    /// Retries are reset, verify that's reflected.
+    EXPECT_EQ(3, db_reconnect_ctl_->retriesLeft());
+    EXPECT_EQ(3, db_reconnect_ctl_->maxRetries());
+}
+
+/// @brief dbFailedCallback
+///
+/// This test verifies that DatabaseConnection::invokeDbFailedCallback
+/// safely invokes the registered DbFailedCallback.
+TEST_F(DatabaseConnectionCallbackTest, dbFailedCallback) {
+    /// Create a Database configuration that includes the reconnect
+    /// control parameters.
+    DatabaseConnection::ParameterMap pmap;
+    pmap[std::string("type")] = std::string("test");
+    pmap[std::string("max-reconnect-tries")] = std::string("3");
+    pmap[std::string("reconnect-wait-time")] = std::string("60000");
+
+    /// Install the callback.
+    DatabaseConnection::db_lost_callback_ =
+        std::bind(&DatabaseConnectionCallbackTest::dbLostCallback, this, ph::_1);
+    DatabaseConnection::db_failed_callback_ =
+        std::bind(&DatabaseConnectionCallbackTest::dbFailedCallback, this, ph::_1);
+    /// Create the connection..
+    DatabaseConnection datasrc(pmap);
+    datasrc.makeReconnectCtl("timer");
+    bool ret = false;
+
+    /// We should be able to invoke the callback and get
+    /// the correct reconnect control parameters from it.
+    ASSERT_NO_THROW(ret = DatabaseConnection::invokeDbLostCallback(datasrc.reconnectCtl()));
+    EXPECT_TRUE(ret);
+    ASSERT_TRUE(db_reconnect_ctl_);
+    ASSERT_EQ("test", db_reconnect_ctl_->backendType());
+    ASSERT_EQ("timer", db_reconnect_ctl_->timerName());
+    ASSERT_EQ(3, db_reconnect_ctl_->maxRetries());
+    ASSERT_EQ(3, db_reconnect_ctl_->retriesLeft());
+    EXPECT_EQ(60000, db_reconnect_ctl_->retryInterval());
+
+    /// Verify that checkRetries() correctly decrements
+    /// down to zero, and that retriesLeft() returns
+    /// the correct value.
+    for (int i = 3; i > 1 ; --i) {
+        ASSERT_EQ(i, db_reconnect_ctl_->retriesLeft());
+        ASSERT_TRUE(db_reconnect_ctl_->checkRetries());
+    }
+
+    /// Retries are exhausted, verify that's reflected.
+    EXPECT_FALSE(db_reconnect_ctl_->checkRetries());
+    EXPECT_EQ(0, db_reconnect_ctl_->retriesLeft());
+    EXPECT_EQ(3, db_reconnect_ctl_->maxRetries());
+
+    /// Reset the reconnect ctl object to verify that it is set again.
+    db_reconnect_ctl_.reset();
+
+    /// We should be able to invoke the callback and get
+    /// the correct reconnect control parameters from it.
+    ASSERT_NO_THROW(ret = DatabaseConnection::invokeDbFailedCallback(datasrc.reconnectCtl()));
+    EXPECT_FALSE(ret);
+    ASSERT_TRUE(db_reconnect_ctl_);
+    ASSERT_EQ("test", db_reconnect_ctl_->backendType());
+    ASSERT_EQ("timer", db_reconnect_ctl_->timerName());
+    EXPECT_EQ(60000, db_reconnect_ctl_->retryInterval());
+
+    /// Retries are reset, verify that's reflected.
+    EXPECT_EQ(3, db_reconnect_ctl_->retriesLeft());
+    EXPECT_EQ(3, db_reconnect_ctl_->maxRetries());
+}
+
+// This test checks that a database access string can be parsed correctly.
+TEST(DatabaseConnectionTest, parse) {
+
+    DatabaseConnection::ParameterMap parameters = DatabaseConnection::parse(
+        "user=me password='forbidden' name=kea somethingelse= type=mysql");
+
+    EXPECT_EQ(5, parameters.size());
+    EXPECT_EQ("me", parameters["user"]);
+    EXPECT_EQ("forbidden", parameters["password"]);
+    EXPECT_EQ("kea", parameters["name"]);
+    EXPECT_EQ("mysql", parameters["type"]);
+    EXPECT_EQ("", parameters["somethingelse"]);
+}
+
+// This test checks that it is allowed to specify password including whitespaces
+// assuming that the password is enclosed in ''.
+TEST(DatabaseConnectionTest, parsePasswordWithWhitespace) {
+
+    // Case 1: password in the middle.
+    DatabaseConnection::ParameterMap parameters = DatabaseConnection::parse(
+        "user=me password='forbidden with space' name=kea type=mysql");
+
+    EXPECT_EQ(4, parameters.size());
+    EXPECT_EQ("me", parameters["user"]);
+    EXPECT_EQ("forbidden with space", parameters["password"]);
+    EXPECT_EQ("kea", parameters["name"]);
+    EXPECT_EQ("mysql", parameters["type"]);
+
+    // Case 2: password at the end.
+    parameters = DatabaseConnection::parse("user=me name=kea type=mysql password='forbidden with space'");
+
+    EXPECT_EQ(4, parameters.size());
+    EXPECT_EQ("me", parameters["user"]);
+    EXPECT_EQ("forbidden with space", parameters["password"]);
+    EXPECT_EQ("kea", parameters["name"]);
+    EXPECT_EQ("mysql", parameters["type"]);
+
+    // Case 3: Empty password at the end.
+    parameters = DatabaseConnection::parse("user=me name=kea type=mysql password=''");
+
+    EXPECT_EQ(4, parameters.size());
+    EXPECT_EQ("me", parameters["user"]);
+    EXPECT_EQ("", parameters["password"]);
+    EXPECT_EQ("kea", parameters["name"]);
+    EXPECT_EQ("mysql", parameters["type"]);
+
+    // Case 4: password at the beginning.
+    parameters = DatabaseConnection::parse("password='forbidden with space' user=me name=kea type=mysql");
+
+    EXPECT_EQ(4, parameters.size());
+    EXPECT_EQ("me", parameters["user"]);
+    EXPECT_EQ("forbidden with space", parameters["password"]);
+    EXPECT_EQ("kea", parameters["name"]);
+    EXPECT_EQ("mysql", parameters["type"]);
+
+    // Case 5: Empty password at the beginning.
+    parameters = DatabaseConnection::parse("password='' user=me name=kea type=mysql");
+
+    EXPECT_EQ(4, parameters.size());
+    EXPECT_EQ("me", parameters["user"]);
+    EXPECT_EQ("", parameters["password"]);
+    EXPECT_EQ("kea", parameters["name"]);
+    EXPECT_EQ("mysql", parameters["type"]);
+
+
+    // Case 6: Password is a sole parameter.
+    parameters = DatabaseConnection::parse("password='forbidden with spaces'");
+
+    EXPECT_EQ(1, parameters.size());
+    EXPECT_EQ("forbidden with spaces", parameters["password"]);
+}
+
+// This test checks that an invalid database access string behaves as expected.
+TEST(DatabaseConnectionTest, parseInvalid) {
+
+    // No tokens in the string, so we expect no parameters
+    std::string invalid = "";
+    DatabaseConnection::ParameterMap parameters = DatabaseConnection::parse(invalid);
+    EXPECT_EQ(0, parameters.size());
+
+    // With spaces, there are some tokens so we expect invalid parameter
+    // as there are no equals signs.
+    invalid = "   \t  ";
+    EXPECT_THROW(DatabaseConnection::parse(invalid), isc::InvalidParameter);
+
+    invalid = "   noequalshere  ";
+    EXPECT_THROW(DatabaseConnection::parse(invalid), isc::InvalidParameter);
+
+    // Mismatched single quote.
+    invalid = "password='xyz";
+    EXPECT_THROW(DatabaseConnection::parse(invalid), isc::InvalidParameter);
+
+    // A single "=" is valid string, but is placed here as the result is
+    // expected to be nothing.
+    invalid = "=";
+    parameters = DatabaseConnection::parse(invalid);
+    EXPECT_EQ(1, parameters.size());
+    EXPECT_EQ("", parameters[""]);
+}
+
+/// @brief redactedAccessString test
+///
+/// Checks that the redacted configuration string includes the password only
+/// as a set of asterisks.
+TEST(DatabaseConnectionTest, redactAccessString) {
+
+    DatabaseConnection::ParameterMap parameters =
+        DatabaseConnection::parse("user=me password=forbidden name=kea type=mysql");
+    EXPECT_EQ(4, parameters.size());
+    EXPECT_EQ("me", parameters["user"]);
+    EXPECT_EQ("forbidden", parameters["password"]);
+    EXPECT_EQ("kea", parameters["name"]);
+    EXPECT_EQ("mysql", parameters["type"]);
+
+    // Redact the result.  To check, break the redacted string down into its
+    // components.
+    std::string redacted = DatabaseConnection::redactedAccessString(parameters);
+    parameters = DatabaseConnection::parse(redacted);
+
+    EXPECT_EQ(4, parameters.size());
+    EXPECT_EQ("me", parameters["user"]);
+    EXPECT_EQ("*****", parameters["password"]);
+    EXPECT_EQ("kea", parameters["name"]);
+    EXPECT_EQ("mysql", parameters["type"]);
+}
+
+/// @brief redactedAccessString test - empty password
+///
+/// Checks that the redacted configuration string includes the password only
+/// as a set of asterisks, even if the password is null.
+TEST(DatabaseConnectionTest, redactAccessStringEmptyPassword) {
+
+    DatabaseConnection::ParameterMap parameters =
+        DatabaseConnection::parse("user=me name=kea type=mysql password=");
+    EXPECT_EQ(4, parameters.size());
+    EXPECT_EQ("me", parameters["user"]);
+    EXPECT_EQ("", parameters["password"]);
+    EXPECT_EQ("kea", parameters["name"]);
+    EXPECT_EQ("mysql", parameters["type"]);
+
+    // Redact the result.  To check, break the redacted string down into its
+    // components.
+    std::string redacted = DatabaseConnection::redactedAccessString(parameters);
+    parameters = DatabaseConnection::parse(redacted);
+
+    EXPECT_EQ(4, parameters.size());
+    EXPECT_EQ("me", parameters["user"]);
+    EXPECT_EQ("*****", parameters["password"]);
+    EXPECT_EQ("kea", parameters["name"]);
+    EXPECT_EQ("mysql", parameters["type"]);
+
+    // ... and again to check that the position of the empty password in the
+    // string does not matter.
+    parameters = DatabaseConnection::parse("user=me password= name=kea type=mysql");
+    EXPECT_EQ(4, parameters.size());
+    EXPECT_EQ("me", parameters["user"]);
+    EXPECT_EQ("", parameters["password"]);
+    EXPECT_EQ("kea", parameters["name"]);
+    EXPECT_EQ("mysql", parameters["type"]);
+
+    redacted = DatabaseConnection::redactedAccessString(parameters);
+    parameters = DatabaseConnection::parse(redacted);
+
+    EXPECT_EQ(4, parameters.size());
+    EXPECT_EQ("me", parameters["user"]);
+    EXPECT_EQ("*****", parameters["password"]);
+    EXPECT_EQ("kea", parameters["name"]);
+    EXPECT_EQ("mysql", parameters["type"]);
+}
+
+/// @brief redactedAccessString test - no password
+///
+/// Checks that the redacted configuration string excludes the password if there
+/// was no password to begin with.
+TEST(DatabaseConnectionTest, redactAccessStringNoPassword) {
+
+    DatabaseConnection::ParameterMap parameters =
+        DatabaseConnection::parse("user=me name=kea type=mysql");
+    EXPECT_EQ(3, parameters.size());
+    EXPECT_EQ("me", parameters["user"]);
+    EXPECT_EQ("kea", parameters["name"]);
+    EXPECT_EQ("mysql", parameters["type"]);
+
+    // Redact the result.  To check, break the redacted string down into its
+    // components.
+    std::string redacted = DatabaseConnection::redactedAccessString(parameters);
+    parameters = DatabaseConnection::parse(redacted);
+
+    EXPECT_EQ(3, parameters.size());
+    EXPECT_EQ("me", parameters["user"]);
+    EXPECT_EQ("kea", parameters["name"]);
+    EXPECT_EQ("mysql", parameters["type"]);
+}
+
+// Check that the toElementDbAccessString() handles all valid parameters
+// Note that because toElementDbAccessString() utilizes
+// toElement() this tests both.
+TEST(DatabaseConnection, toElementDbAccessStringValid) {
+    const char* configs[] = {
+        "{\n"
+        "\"connect-timeout\": 200, \n"
+        "\"on-fail\": \"stop-retry-exit\", \n"
+        "\"lfc-interval\" : 100, \n"
+        "\"host\": \"whatevah\", \n"
+        "\"max-reconnect-tries\": 5, \n"
+        "\"name\": \"name_str\", \n"
+        "\"password\": \"password_str\", \n"
+        "\"persist\" : true, \n"
+        "\"port\" : 300, \n"
+        "\"readonly\" : false, \n"
+        "\"reconnect-wait-time\": 99, \n"
+        "\"type\": \"memfile\", \n"
+        "\"user\": \"user_str\", \n"
+        "\"max-row-errors\": 50, \n"
+        "\"trust-anchor\": \"my-ca\", \n"
+        "\"cert-file\": \"my-cert.crt\", \n"
+        "\"key-file\": \"my-key.key\", \n"
+        "\"cipher-list\": \"AES\" \n"
+        "}\n"
+    };
+
+    DbAccessParser parser;
+    std::string access_str;
+    ConstElementPtr json_elements;
+
+    ASSERT_NO_THROW(json_elements = Element::fromJSON(configs[0]));
+    ASSERT_NO_THROW(parser.parse(access_str, json_elements));
+
+    ElementPtr round_trip = DatabaseConnection::toElementDbAccessString(access_str);
+
+    ASSERT_TRUE(json_elements->equals(*round_trip));
+}
+
+// Check that the toElementDbAccessString() handles Postgres backend
+// specific parameters.
+TEST(DatabaseConnection, toElementDbAccessStringValidPostgresql) {
+    const char* configs[] = {
+        "{\n"
+        "\"connect-timeout\": 200, \n"
+        "\"tcp-user-timeout\": 10, \n"
+        "\"type\": \"postgresql\", \n"
+        "\"user\": \"user_str\" \n"
+        "}\n"
+    };
+
+    DbAccessParser parser;
+    std::string access_str;
+    ConstElementPtr json_elements;
+
+    ASSERT_NO_THROW(json_elements = Element::fromJSON(configs[0]));
+    ASSERT_NO_THROW(parser.parse(access_str, json_elements));
+
+    ElementPtr round_trip = DatabaseConnection::toElementDbAccessString(access_str);
+
+    ASSERT_TRUE(json_elements->equals(*round_trip));
+}
+
+// Check that the toElementDbAccessString() handles MySQL backend
+// specific parameters.
+TEST(DatabaseConnection, toElementDbAccessStringValidMySql) {
+    const char* configs[] = {
+        "{\n"
+        "\"connect-timeout\": 200, \n"
+        "\"read-timeout\": 10, \n"
+        "\"write-timeout\": 10, \n"
+        "\"type\": \"mysql\", \n"
+        "\"user\": \"user_str\" \n"
+        "}\n"
+    };
+
+    DbAccessParser parser;
+    std::string access_str;
+    ConstElementPtr json_elements;
+
+    ASSERT_NO_THROW(json_elements = Element::fromJSON(configs[0]));
+    ASSERT_NO_THROW(parser.parse(access_str, json_elements));
+
+    ElementPtr round_trip = DatabaseConnection::toElementDbAccessString(access_str);
+
+    ASSERT_TRUE(json_elements->equals(*round_trip));
+}
+
+// Check that toElementDbAccessString() catches invalid parameters.
+// Note that because toElementDbAccessString() utilizes
+// toElement() this tests both.
+//
+// Test has been disabled. The recent change turned handling of unknown connection
+// string params. Instead of throwing, it logs an error and continues. This gives
+// us better resiliency. However, we don't have any means implemented to
+// test whether it was printed or not. It's reasonably easy to implement such a
+// check, but we don't have time for this.
+TEST(DatabaseConnection, DISABLED_toElementDbAccessStringInvalid) {
+    std::vector<std::string> access_strs = {
+        "bogus-param=memfile",
+        "lfc-interval=not-an-integer",
+        "connect-timeout=not-an-integer",
+        "port=not-an-integer",
+        "persist=not-boolean",
+        "readonly=not-boolean"
+    };
+
+    for (auto access_str : access_strs) {
+        /// @todo: verify that an ERROR is logged.
+        ASSERT_NO_THROW(DatabaseConnection::toElementDbAccessString(access_str));
+    }
+}
+
+// Check that toElementDbAccessString() handles empty access string
+// Note that because toElementDbAccessString() utilizes
+// toElement() this tests both.
+TEST(DatabaseConnection, toElementDbAccessStringEmpty) {
+    ConstElementPtr elements;
+    ASSERT_NO_THROW(elements = DatabaseConnection::toElementDbAccessString(""));
+    ASSERT_TRUE(elements);
+    ASSERT_EQ(0, elements->size());
+}
diff --git a/src/lib/database/tests/database_log_unittest.cc b/src/lib/database/tests/database_log_unittest.cc
new file mode 100644
index 0000000..1caa12c
--- /dev/null
+++ b/src/lib/database/tests/database_log_unittest.cc
@@ -0,0 +1,48 @@
+// 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 <database/db_log.h>
+
+#include <gtest/gtest.h>
+
+using isc::db::DB_DBG_TRACE_DETAIL;
+using isc::db::DB_INVALID_ACCESS;
+using isc::db::DB_LOG_FATAL;
+using isc::db::DB_LOG_ERROR;
+using isc::db::DB_LOG_WARN;
+using isc::db::DB_LOG_INFO;
+using isc::db::DB_LOG_DEBUG;
+using isc::db::db_logger_mutex;
+
+namespace {
+
+/// Test that the mutex unlocks after a call to DB_LOG.
+/// Let's use DB_INVALID_ACCESS as an example for all.
+TEST(DatabaseLogTest, mutexIsolation) {
+    DB_LOG_FATAL(DB_INVALID_ACCESS).arg("hello");
+    EXPECT_TRUE(db_logger_mutex.try_lock());
+    db_logger_mutex.unlock();
+
+    DB_LOG_ERROR(DB_INVALID_ACCESS).arg("hello");
+    EXPECT_TRUE(db_logger_mutex.try_lock());
+    db_logger_mutex.unlock();
+
+    DB_LOG_WARN(DB_INVALID_ACCESS).arg("hello");
+    EXPECT_TRUE(db_logger_mutex.try_lock());
+    db_logger_mutex.unlock();
+
+    DB_LOG_INFO(DB_INVALID_ACCESS).arg("hello");
+    EXPECT_TRUE(db_logger_mutex.try_lock());
+    db_logger_mutex.unlock();
+
+    DB_LOG_DEBUG(DB_DBG_TRACE_DETAIL, DB_INVALID_ACCESS).arg("hello");
+    EXPECT_TRUE(db_logger_mutex.try_lock());
+    db_logger_mutex.unlock();
+}
+
+}  // namespace
diff --git a/src/lib/database/tests/dbaccess_parser_unittest.cc b/src/lib/database/tests/dbaccess_parser_unittest.cc
new file mode 100644
index 0000000..29322e0
--- /dev/null
+++ b/src/lib/database/tests/dbaccess_parser_unittest.cc
@@ -0,0 +1,1001 @@
+// Copyright (C) 2012-2023 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 <cc/command_interpreter.h>
+#include <database/database_connection.h>
+#include <database/db_exceptions.h>
+#include <database/dbaccess_parser.h>
+#include <log/logger_support.h>
+
+#include <gtest/gtest.h>
+
+#include <map>
+#include <string>
+
+using namespace std;
+using namespace isc;
+using namespace isc::db;
+using namespace isc::data;
+using namespace isc::config;
+
+namespace {
+
+/// @brief Database Access Parser test fixture class
+class DbAccessParserTest : public ::testing::Test {
+public:
+    /// @brief Constructor
+    DbAccessParserTest() {
+    }
+    /// @brief Destructor
+    ///
+    /// As some of the tests have the side-effect of altering the logging
+    /// settings (when the parser's "parse" method is called), ensure that
+    /// the logging is reset to the default after each test completes.
+    ~DbAccessParserTest() {
+        isc::log::setDefaultLoggingOutput();
+    }
+
+    /// @brief Build JSON String
+    ///
+    /// Given a array of "const char*" strings representing in order, keyword,
+    /// value, keyword, value, ... and terminated by a NULL, return a string
+    /// that represents the JSON map for the keywords and values.
+    ///
+    /// E.g. given the array of strings: alpha, one, beta, two, NULL, it would
+    /// return the string '{ "alpha": "one", "beta": "two" }'
+    ///
+    /// @param keyval Array of "const char*" strings in the order keyword,
+    ///        value, keyword, value ...  A NULL entry terminates the list.
+    ///
+    /// @return JSON map for the keyword value array.
+    std::string toJson(const char* keyval[]) {
+        const std::string quote = "\"";
+        const std::string colon = ":";
+        const std::string space = " ";
+
+        string result = "{ ";
+
+        for (size_t i = 0; keyval[i] != NULL; i+= 2) {
+            // Get the value.  This should not be NULL.  As ASSERT_NE will
+            // cause a return - which gives compilation problems as a return
+            // statement is expected to return a string - use EXPECT_NE and
+            // explicitly return if the expected array is incorrect.
+            EXPECT_NE(static_cast<const char*>(NULL), keyval[i + 1]) <<
+                "Supplied reference keyword/value list does not contain values "
+                "for all keywords";
+            if (keyval[i + 1] == NULL) {
+                return (std::string(""));
+            }
+
+            // Add the separating comma if not the first.
+            if (i != 0) {
+                result += ", ";
+            }
+
+            // Add the keyword and value - make sure that they are quoted.
+            // The parameters which are not quoted are persist, readonly and
+            // lfc-interval as they are boolean and integer respectively.
+            result += quote + keyval[i] + quote + colon + space;
+            if (!quoteValue(std::string(keyval[i]))) {
+                result += keyval[i + 1];
+
+            } else {
+                result += quote + keyval[i + 1] + quote;
+            }
+        }
+
+        // Add the terminating brace
+        result += " }";
+
+        return (result);
+    }
+
+    /// @brief Check for Keywords
+    ///
+    /// Takes a database access string and checks it against a list of keywords
+    /// and values.  It checks that:
+    ///
+    /// a. Every keyword in the string appears once and only once in the
+    ///    list.
+    /// b. Every keyword in the list appears in the string.
+    /// c. Every keyword's value is the same as that in the string.
+    ///
+    /// To parse the access string, we use the parsing function in the
+    /// DHCP lease manager.
+    ///
+    /// @param trace_string String that will be used to set the value of a
+    ///        SCOPED_TRACE for this call.
+    /// @param dbaccess set of database access parameters to check
+    /// @param keyval Array of "const char*" strings in the order keyword,
+    ///        value, keyword, value ...  A NULL entry terminates the list.
+    void checkAccessString(const char* trace_string,
+                           const DatabaseConnection::ParameterMap& parameters,
+                           const char* keyval[]) {
+        SCOPED_TRACE(trace_string);
+
+        // Construct a map of keyword value pairs.
+        std::map<string, string> expected;
+        size_t expected_count = 0;
+        for (size_t i = 0; keyval[i] != NULL; i += 2) {
+            // Get the value.  This should not be NULL
+            ASSERT_NE(static_cast<const char*>(NULL), keyval[i + 1]) <<
+                "Supplied reference keyword/value list does not contain values "
+                "for all keywords";
+            expected[keyval[i]] = keyval[i + 1];
+
+            // One more keyword processed
+            ++expected_count;
+        }
+
+        // Check no duplicates in the test set of reference keywords.
+        ASSERT_EQ(expected_count, expected.size()) <<
+            "Supplied reference keyword/value list contains duplicate keywords";
+
+        // The passed parameter map should have the same number of entries as
+        // the reference set of keywords.
+        EXPECT_EQ(expected_count, parameters.size());
+
+        // Check that the keywords and keyword values are the same: loop
+        // through the keywords in the database access string.
+        for (DatabaseConnection::ParameterMap::const_iterator actual = parameters.begin();
+             actual != parameters.end(); ++actual) {
+
+            // Does the keyword exist in the set of expected keywords?
+            std::map<string, string>::iterator corresponding =
+                expected.find(actual->first);
+            ASSERT_TRUE(corresponding != expected.end());
+
+            // Keyword exists, is the value the same?
+            EXPECT_EQ(corresponding->second, actual->second);
+        }
+    }
+
+private:
+
+    /// @brief Checks if the value of the specified parameter should be
+    /// quoted in the configuration.
+    ///
+    /// @param parameter A parameter for which it should be checked whether
+    /// the value should be quoted or not.
+    ///
+    /// @return true if the value of the parameter should be quoted.
+     bool quoteValue(const std::string& parameter) const {
+         return ((parameter != "persist") && (parameter != "lfc-interval") &&
+                 (parameter != "connect-timeout") &&
+                 (parameter != "read-timeout") &&
+                 (parameter != "write-timeout") &&
+                 (parameter != "tcp-user-timeout") &&
+                 (parameter != "port") &&
+                 (parameter != "max-row-errors") &&
+                 (parameter != "readonly"));
+    }
+
+};
+
+
+/// @brief Version of parser with protected methods public
+///
+/// Some of the methods in DbAccessParser are not required to be public in Kea.
+/// Instead of being declared "private", they are declared "protected" so that
+/// they can be accessed through a derived class in the unit tests.
+class TestDbAccessParser : public DbAccessParser {
+public:
+
+    /// @brief Constructor
+    TestDbAccessParser()
+        : DbAccessParser()
+    {}
+
+    /// @brief Destructor
+    virtual ~TestDbAccessParser()
+    {}
+
+    /// @brief Parse configuration value
+    ///
+    /// @param database_config Configuration to be parsed.
+    void parse(ConstElementPtr database_config) {
+        std::string db_access_string;
+        DbAccessParser::parse(db_access_string, database_config);
+    }
+
+    /// @brief Get database access parameters
+    ///
+    /// Used in testing to check that the configuration information has been
+    /// parsed corrected.
+    ///
+    /// @return Map of keyword/value pairs representing database access
+    ///         information.
+    const DatabaseConnection::ParameterMap& getDbAccessParameters() const {
+        return (DbAccessParser::getDbAccessParameters());
+    }
+
+    /// @brief Construct database access string
+    ///
+    /// Constructs the database access string from the stored parameters.
+    ///
+    /// @return Database access string
+    std::string getDbAccessString() const {
+        return (DbAccessParser::getDbAccessString());
+    }
+};
+
+// Check that the parser works with a simple configuration.
+TEST_F(DbAccessParserTest, validTypeMemfile) {
+    const char* config[] = {"type", "memfile",
+                            NULL};
+
+    string json_config = toJson(config);
+    ConstElementPtr json_elements = Element::fromJSON(json_config);
+    EXPECT_TRUE(json_elements);
+
+    TestDbAccessParser parser;
+    EXPECT_NO_THROW(parser.parse(json_elements));
+    checkAccessString("Valid memfile", parser.getDbAccessParameters(), config);
+}
+
+// Check that the parser works with a simple configuration for host database.
+TEST_F(DbAccessParserTest, hosts) {
+    const char* config[] = {"type", "memfile",
+                            NULL};
+
+    string json_config = toJson(config);
+    ConstElementPtr json_elements = Element::fromJSON(json_config);
+    EXPECT_TRUE(json_elements);
+
+    TestDbAccessParser parser;
+    EXPECT_NO_THROW(parser.parse(json_elements));
+    checkAccessString("Valid memfile", parser.getDbAccessParameters(), config);
+}
+
+// Check that the parser works with a simple configuration that
+// includes empty elements.
+TEST_F(DbAccessParserTest, emptyKeyword) {
+    const char* config[] = {"type", "memfile",
+                            "name", "",
+                            NULL};
+
+    string json_config = toJson(config);
+    ConstElementPtr json_elements = Element::fromJSON(json_config);
+    EXPECT_TRUE(json_elements);
+
+    TestDbAccessParser parser;
+    EXPECT_NO_THROW(parser.parse(json_elements));
+    checkAccessString("Valid memfile", parser.getDbAccessParameters(), config);
+}
+
+// Check that the parser works with more complex configuration when
+// lease file path is specified for DHCPv4.
+TEST_F(DbAccessParserTest, persistV4Memfile) {
+    const char* config[] = {"type", "memfile",
+                            "persist", "true",
+                            "name", "/opt/var/lib/kea/kea-leases4.csv",
+                            NULL};
+
+    string json_config = toJson(config);
+    ConstElementPtr json_elements = Element::fromJSON(json_config);
+    EXPECT_TRUE(json_elements);
+
+    TestDbAccessParser parser;
+    EXPECT_NO_THROW(parser.parse(json_elements));
+
+    checkAccessString("Valid memfile", parser.getDbAccessParameters(),
+                      config);
+}
+
+// Check that the parser works with more complex configuration when
+// lease file path is specified for DHCPv6.
+TEST_F(DbAccessParserTest, persistV6Memfile) {
+    const char* config[] = {"type", "memfile",
+                            "persist", "true",
+                            "name", "/opt/var/lib/kea/kea-leases6.csv",
+                            NULL};
+
+    string json_config = toJson(config);
+    ConstElementPtr json_elements = Element::fromJSON(json_config);
+    EXPECT_TRUE(json_elements);
+
+    TestDbAccessParser parser;
+    EXPECT_NO_THROW(parser.parse(json_elements));
+
+    checkAccessString("Valid memfile", parser.getDbAccessParameters(),
+                      config);
+}
+
+// This test checks that the parser accepts the valid value of the
+// lfc-interval parameter.
+TEST_F(DbAccessParserTest, validLFCInterval) {
+    const char* config[] = {"type", "memfile",
+                            "name", "/opt/var/lib/kea/kea-leases6.csv",
+                            "lfc-interval", "3600",
+                            NULL};
+
+    string json_config = toJson(config);
+    ConstElementPtr json_elements = Element::fromJSON(json_config);
+    EXPECT_TRUE(json_elements);
+
+    TestDbAccessParser parser;
+    EXPECT_NO_THROW(parser.parse(json_elements));
+    checkAccessString("Valid LFC Interval", parser.getDbAccessParameters(),
+                      config);
+}
+
+// This test checks that the parser rejects the negative value of the
+// lfc-interval parameter.
+TEST_F(DbAccessParserTest, negativeLFCInterval) {
+    const char* config[] = {"type", "memfile",
+                            "name", "/opt/var/lib/kea/kea-leases6.csv",
+                            "lfc-interval", "-1",
+                            NULL};
+
+    string json_config = toJson(config);
+    ConstElementPtr json_elements = Element::fromJSON(json_config);
+    EXPECT_TRUE(json_elements);
+
+    TestDbAccessParser parser;
+    EXPECT_THROW(parser.parse(json_elements), DbConfigError);
+}
+
+// This test checks that the parser rejects the too large (greater than
+// the max uint32_t) value of the lfc-interval parameter.
+TEST_F(DbAccessParserTest, largeLFCInterval) {
+    const char* config[] = {"type", "memfile",
+                            "name", "/opt/var/lib/kea/kea-leases6.csv",
+                            "lfc-interval", "4294967296",
+                            NULL};
+
+    string json_config = toJson(config);
+    ConstElementPtr json_elements = Element::fromJSON(json_config);
+    EXPECT_TRUE(json_elements);
+
+    TestDbAccessParser parser;
+    EXPECT_THROW(parser.parse(json_elements), DbConfigError);
+}
+
+// This test checks that the parser accepts the valid value of the
+// connect-timeout parameter.
+TEST_F(DbAccessParserTest, validConnectTimeout) {
+    const char* config[] = {"type", "mysql",
+                            "name", "keatest",
+                            "connect-timeout", "3600",
+                            NULL};
+
+    string json_config = toJson(config);
+    ConstElementPtr json_elements = Element::fromJSON(json_config);
+    EXPECT_TRUE(json_elements);
+
+    TestDbAccessParser parser;
+    EXPECT_NO_THROW(parser.parse(json_elements));
+    checkAccessString("Valid timeout", parser.getDbAccessParameters(),
+                      config);
+}
+
+// This test checks that the parser rejects the negative value of the
+// connect-timeout parameter.
+TEST_F(DbAccessParserTest, negativeConnectTimeout) {
+    const char* config[] = {"type", "mysql",
+                            "name", "keatest",
+                            "connect-timeout", "-1",
+                            NULL};
+
+    string json_config = toJson(config);
+    ConstElementPtr json_elements = Element::fromJSON(json_config);
+    EXPECT_TRUE(json_elements);
+
+    TestDbAccessParser parser;
+    EXPECT_THROW(parser.parse(json_elements), DbConfigError);
+}
+
+// This test checks that the parser rejects a too large (greater than
+// the max uint32_t) value of the connecttimeout parameter.
+TEST_F(DbAccessParserTest, largeConnectTimeout) {
+    const char* config[] = {"type", "mysql",
+                            "name", "keatest",
+                            "connect-timeout", "4294967296",
+                            NULL};
+
+    string json_config = toJson(config);
+    ConstElementPtr json_elements = Element::fromJSON(json_config);
+    EXPECT_TRUE(json_elements);
+
+    TestDbAccessParser parser;
+    EXPECT_THROW(parser.parse(json_elements), DbConfigError);
+}
+
+// This test checks that the parser accepts the valid value of the
+// read-timeout parameter.
+TEST_F(DbAccessParserTest, validReadTimeout) {
+    const char* config[] = {"type", "mysql",
+                            "name", "keatest",
+                            "read-timeout", "3600",
+                            NULL};
+
+    string json_config = toJson(config);
+    ConstElementPtr json_elements = Element::fromJSON(json_config);
+    EXPECT_TRUE(json_elements);
+
+    TestDbAccessParser parser;
+    EXPECT_NO_THROW(parser.parse(json_elements));
+    checkAccessString("Valid read timeout", parser.getDbAccessParameters(),
+                      config);
+}
+
+// This test checks that the parser rejects the negative value of the
+// read-timeout parameter.
+TEST_F(DbAccessParserTest, negativeReadTimeout) {
+    const char* config[] = {"type", "mysql",
+                            "name", "keatest",
+                            "read-timeout", "-1",
+                            NULL};
+
+    string json_config = toJson(config);
+    ConstElementPtr json_elements = Element::fromJSON(json_config);
+    EXPECT_TRUE(json_elements);
+
+    TestDbAccessParser parser;
+    EXPECT_THROW(parser.parse(json_elements), DbConfigError);
+}
+
+// This test checks that the parser rejects a too large (greater than
+// the max uint32_t) value of the read-timeout parameter.
+TEST_F(DbAccessParserTest, largeReadTimeout) {
+    const char* config[] = {"type", "mysql",
+                            "name", "keatest",
+                            "read-timeout", "4294967296",
+                            NULL};
+
+    string json_config = toJson(config);
+    ConstElementPtr json_elements = Element::fromJSON(json_config);
+    EXPECT_TRUE(json_elements);
+
+    TestDbAccessParser parser;
+    EXPECT_THROW(parser.parse(json_elements), DbConfigError);
+}
+
+// This test checks that the parser accepts the valid value of the
+// write-timeout parameter.
+TEST_F(DbAccessParserTest, validWriteTimeout) {
+    const char* config[] = {"type", "mysql",
+                            "name", "keatest",
+                            "write-timeout", "3600",
+                            NULL};
+
+    string json_config = toJson(config);
+    ConstElementPtr json_elements = Element::fromJSON(json_config);
+    EXPECT_TRUE(json_elements);
+
+    TestDbAccessParser parser;
+    EXPECT_NO_THROW(parser.parse(json_elements));
+    checkAccessString("Valid write timeout", parser.getDbAccessParameters(),
+                      config);
+}
+
+// This test checks that the parser rejects the negative value of the
+// write-timeout parameter.
+TEST_F(DbAccessParserTest, negativeWriteTimeout) {
+    const char* config[] = {"type", "mysql",
+                            "name", "keatest",
+                            "write-timeout", "-1",
+                            NULL};
+
+    string json_config = toJson(config);
+    ConstElementPtr json_elements = Element::fromJSON(json_config);
+    EXPECT_TRUE(json_elements);
+
+    TestDbAccessParser parser;
+    EXPECT_THROW(parser.parse(json_elements), DbConfigError);
+}
+
+// This test checks that the parser rejects a too large (greater than
+// the max uint32_t) value of the write-timeout parameter.
+TEST_F(DbAccessParserTest, largeWriteTimeout) {
+    const char* config[] = {"type", "mysql",
+                            "name", "keatest",
+                            "write-timeout", "4294967296",
+                            NULL};
+
+    string json_config = toJson(config);
+    ConstElementPtr json_elements = Element::fromJSON(json_config);
+    EXPECT_TRUE(json_elements);
+
+    TestDbAccessParser parser;
+    EXPECT_THROW(parser.parse(json_elements), DbConfigError);
+}
+
+// This test checks that the parser accepts the valid value of the
+// tcp-user-timeout parameter.
+TEST_F(DbAccessParserTest, validTcpUserTimeout) {
+    const char* config[] = {"type", "postgresql",
+                            "name", "keatest",
+                            "tcp-user-timeout", "3600",
+                            NULL};
+
+    string json_config = toJson(config);
+    ConstElementPtr json_elements = Element::fromJSON(json_config);
+    EXPECT_TRUE(json_elements);
+
+    TestDbAccessParser parser;
+    EXPECT_NO_THROW(parser.parse(json_elements));
+    checkAccessString("Valid write timeout", parser.getDbAccessParameters(),
+                      config);
+}
+
+// This test checks that the parser rejects the negative value of the
+// tcp-user-timeout parameter.
+TEST_F(DbAccessParserTest, negativeTcpUserTimeout) {
+    const char* config[] = {"type", "postgresql",
+                            "name", "keatest",
+                            "tcp-user-timeout", "-1",
+                            NULL};
+
+    string json_config = toJson(config);
+    ConstElementPtr json_elements = Element::fromJSON(json_config);
+    EXPECT_TRUE(json_elements);
+
+    TestDbAccessParser parser;
+    EXPECT_THROW(parser.parse(json_elements), DbConfigError);
+}
+
+// This test checks that the parser rejects a too large (greater than
+// the max uint32_t) value of the tcp-user-timeout parameter.
+TEST_F(DbAccessParserTest, largeTcpUserTimeout) {
+    const char* config[] = {"type", "postgresql",
+                            "name", "keatest",
+                            "tcp-user-timeout", "4294967296",
+                            NULL};
+
+    string json_config = toJson(config);
+    ConstElementPtr json_elements = Element::fromJSON(json_config);
+    EXPECT_TRUE(json_elements);
+
+    TestDbAccessParser parser;
+    EXPECT_THROW(parser.parse(json_elements), DbConfigError);
+}
+
+// This test verifies that specifying the tcp-user-timeout for the
+// memfile backend is not allowed.
+TEST_F(DbAccessParserTest, memfileTcpUserTimeout) {
+    const char* config[] = {"type", "memfile",
+                            "name", "keatest",
+                            "tcp-user-timeout", "10",
+                            NULL};
+
+    string json_config = toJson(config);
+    ConstElementPtr json_elements = Element::fromJSON(json_config);
+    EXPECT_TRUE(json_elements);
+
+    TestDbAccessParser parser;
+    EXPECT_THROW(parser.parse(json_elements), DbConfigError);
+}
+
+// This test verifies that specifying the tcp-user-timeout for the
+// mysql backend is not allowed.
+TEST_F(DbAccessParserTest, mysqlTcpUserTimeout) {
+    const char* config[] = {"type", "mysql",
+                            "name", "keatest",
+                            "tcp-user-timeout", "10",
+                            NULL};
+
+    string json_config = toJson(config);
+    ConstElementPtr json_elements = Element::fromJSON(json_config);
+    EXPECT_TRUE(json_elements);
+
+    TestDbAccessParser parser;
+    EXPECT_THROW(parser.parse(json_elements), DbConfigError);
+}
+
+// This test verifies that specifying the read-timeout for the
+// memfile backend is not allowed.
+TEST_F(DbAccessParserTest, memfileReadTimeout) {
+    const char* config[] = {"type", "memfile",
+                            "name", "keatest",
+                            "read-timeout", "10",
+                            NULL};
+
+    string json_config = toJson(config);
+    ConstElementPtr json_elements = Element::fromJSON(json_config);
+    EXPECT_TRUE(json_elements);
+
+    TestDbAccessParser parser;
+    EXPECT_THROW(parser.parse(json_elements), DbConfigError);
+}
+
+// This test verifies that specifying the read-timeout for the
+// postgresql backend is not allowed.
+TEST_F(DbAccessParserTest, postgresqlReadTimeout) {
+    const char* config[] = {"type", "postgresql",
+                            "name", "keatest",
+                            "read-timeout", "10",
+                            NULL};
+
+    string json_config = toJson(config);
+    ConstElementPtr json_elements = Element::fromJSON(json_config);
+    EXPECT_TRUE(json_elements);
+
+    TestDbAccessParser parser;
+    EXPECT_THROW(parser.parse(json_elements), DbConfigError);
+}
+
+// This test verifies that specifying the write-timeout for the
+// memfile backend is not allowed.
+TEST_F(DbAccessParserTest, memfileWriteTimeout) {
+    const char* config[] = {"type", "memfile",
+                            "name", "keatest",
+                            "write-timeout", "10",
+                            NULL};
+
+    string json_config = toJson(config);
+    ConstElementPtr json_elements = Element::fromJSON(json_config);
+    EXPECT_TRUE(json_elements);
+
+    TestDbAccessParser parser;
+    EXPECT_THROW(parser.parse(json_elements), DbConfigError);
+}
+
+// This test verifies that specifying the write-timeout for the
+// postgresql backend is not allowed.
+TEST_F(DbAccessParserTest, postgresqlWriteTimeout) {
+    const char* config[] = {"type", "postgresql",
+                            "name", "keatest",
+                            "write-timeout", "10",
+                            NULL};
+
+    string json_config = toJson(config);
+    ConstElementPtr json_elements = Element::fromJSON(json_config);
+    EXPECT_TRUE(json_elements);
+
+    TestDbAccessParser parser;
+    EXPECT_THROW(parser.parse(json_elements), DbConfigError);
+}
+
+// This test checks that the parser accepts the valid value of the
+// port parameter.
+TEST_F(DbAccessParserTest, validPort) {
+    const char* config[] = {"type", "memfile",
+                            "name", "/opt/var/lib/kea/kea-leases6.csv",
+                            "port", "3306",
+                            NULL};
+
+    string json_config = toJson(config);
+    ConstElementPtr json_elements = Element::fromJSON(json_config);
+    EXPECT_TRUE(json_elements);
+
+    TestDbAccessParser parser;
+    EXPECT_NO_THROW(parser.parse(json_elements));
+    checkAccessString("Valid port", parser.getDbAccessParameters(),
+                      config);
+}
+
+// This test checks that the parser rejects the negative value of the
+// port parameter.
+TEST_F(DbAccessParserTest, negativePort) {
+    const char* config[] = {"type", "memfile",
+                            "name", "/opt/var/lib/kea/kea-leases6.csv",
+                            "port", "-1",
+                            NULL};
+
+    string json_config = toJson(config);
+    ConstElementPtr json_elements = Element::fromJSON(json_config);
+    EXPECT_TRUE(json_elements);
+
+    TestDbAccessParser parser;
+    EXPECT_THROW(parser.parse(json_elements), DbConfigError);
+}
+
+// This test checks that the parser rejects a too large (greater than
+// the max uint16_t) value of the timeout parameter.
+TEST_F(DbAccessParserTest, largePort) {
+    const char* config[] = {"type", "memfile",
+                            "name", "/opt/var/lib/kea/kea-leases6.csv",
+                            "port", "65536",
+                            NULL};
+
+    string json_config = toJson(config);
+    ConstElementPtr json_elements = Element::fromJSON(json_config);
+    EXPECT_TRUE(json_elements);
+
+    TestDbAccessParser parser;
+    EXPECT_THROW(parser.parse(json_elements), DbConfigError);
+}
+
+// This test checks that the parser accepts a value of zero for the
+// max-row-errors parameter.
+TEST_F(DbAccessParserTest, zeroMaxRowErrors) {
+    const char* config[] = {"type", "memfile",
+                            "name", "/opt/var/lib/kea/kea-leases6.csv",
+                            "max-row-errors", "0",
+                            NULL};
+
+    string json_config = toJson(config);
+    ConstElementPtr json_elements = Element::fromJSON(json_config);
+    EXPECT_TRUE(json_elements);
+
+    TestDbAccessParser parser;
+    EXPECT_NO_THROW(parser.parse(json_elements));
+    checkAccessString("Zero max-row-errors", parser.getDbAccessParameters(),
+                      config);
+}
+
+// This test checks that the parser accepts the valid value of the
+// max-row-errors parameter.
+TEST_F(DbAccessParserTest, validZeroMaxRowErrors) {
+    const char* config[] = {"type", "memfile",
+                            "name", "/opt/var/lib/kea/kea-leases6.csv",
+                            "max-row-errors", "50",
+                            NULL};
+
+    string json_config = toJson(config);
+    ConstElementPtr json_elements = Element::fromJSON(json_config);
+    EXPECT_TRUE(json_elements);
+
+    TestDbAccessParser parser;
+    EXPECT_NO_THROW(parser.parse(json_elements));
+    checkAccessString("Valid max-row-errors", parser.getDbAccessParameters(),
+                      config);
+}
+
+
+// This test checks that the parser rejects the negative value of the
+// max-row-errors parameter.
+TEST_F(DbAccessParserTest, negativeMaxRowErrors) {
+    const char* config[] = {"type", "memfile",
+                            "name", "/opt/var/lib/kea/kea-leases6.csv",
+                            "max-row-errors", "-1",
+                            NULL};
+
+    string json_config = toJson(config);
+    ConstElementPtr json_elements = Element::fromJSON(json_config);
+    EXPECT_TRUE(json_elements);
+
+    TestDbAccessParser parser;
+    EXPECT_THROW(parser.parse(json_elements), DbConfigError);
+}
+
+// This test checks that the parser rejects a too large (greater than
+// the max uint32_t) value of the max-row-errors parameter.
+TEST_F(DbAccessParserTest, largeMaxRowErrors) {
+    const char* config[] = {"type", "memfile",
+                            "name", "/opt/var/lib/kea/kea-leases6.csv",
+                            "max-row-errors", "4294967296",
+                            NULL};
+
+    string json_config = toJson(config);
+    ConstElementPtr json_elements = Element::fromJSON(json_config);
+    EXPECT_TRUE(json_elements);
+
+    TestDbAccessParser parser;
+    EXPECT_THROW(parser.parse(json_elements), DbConfigError);
+}
+
+// Check that the parser works with a valid MySQL configuration
+TEST_F(DbAccessParserTest, validTypeMysql) {
+    const char* config[] = {"type",     "mysql",
+                            "host",     "erewhon",
+                            "port",     "3306",
+                            "user",     "kea",
+                            "password", "keapassword",
+                            "name",     "keatest",
+                            NULL};
+
+    string json_config = toJson(config);
+    ConstElementPtr json_elements = Element::fromJSON(json_config);
+    EXPECT_TRUE(json_elements);
+
+    TestDbAccessParser parser;
+    EXPECT_NO_THROW(parser.parse(json_elements));
+    checkAccessString("Valid mysql", parser.getDbAccessParameters(), config);
+}
+
+// A missing 'type' keyword should cause an exception to be thrown.
+TEST_F(DbAccessParserTest, missingTypeKeyword) {
+    const char* config[] = {"host",     "erewhon",
+                            "port",     "3306",
+                            "user",     "kea",
+                            "password", "keapassword",
+                            "name",     "keatest",
+                            NULL};
+
+    string json_config = toJson(config);
+    ConstElementPtr json_elements = Element::fromJSON(json_config);
+    EXPECT_TRUE(json_elements);
+
+    TestDbAccessParser parser;
+    EXPECT_THROW(parser.parse(json_elements), DbConfigError);
+}
+
+// Check reconfiguration.  Checks that incremental changes applied to the
+// database configuration are incremental.
+TEST_F(DbAccessParserTest, incrementalChanges) {
+    const char* config1[] = {"type", "memfile",
+                             NULL};
+
+    // Applying config2 will cause a wholesale change.
+    const char* config2[] = {"type",     "mysql",
+                             "host",     "erewhon",
+                             "port",     "3306",
+                             "user",     "kea",
+                             "password", "keapassword",
+                             "name",     "keatest",
+                             NULL};
+
+    // Applying incremental2 should cause a change to config3.
+    const char* incremental2[] = {"user",     "me",
+                                  "password", "meagain",
+                                  NULL};
+    const char* config3[] = {"type",     "mysql",
+                             "host",     "erewhon",
+                             "port",     "3306",
+                             "user",     "me",
+                             "password", "meagain",
+                             "name",     "keatest",
+                             NULL};
+
+    // incremental3 will cause an exception.  There should be no change
+    // to the returned value.
+    const char* incremental3[] = {"type",     "invalid",
+                                  "user",     "you",
+                                  "password", "youagain",
+                                  NULL};
+
+    // incremental4 is a compatible change and should cause a transition
+    // to config4.
+    const char* incremental4[] = {"user",     "them",
+                                  "password", "",
+                                  NULL};
+    const char* config4[] = {"type",     "mysql",
+                             "host",     "erewhon",
+                             "port",     "3306",
+                             "user",     "them",
+                             "password", "",
+                             "name",     "keatest",
+                             NULL};
+
+    TestDbAccessParser parser;
+
+    // First configuration string should cause a representation of that string
+    // to be held.
+    string json_config = toJson(config1);
+    ConstElementPtr json_elements = Element::fromJSON(json_config);
+    EXPECT_TRUE(json_elements);
+
+    EXPECT_NO_THROW(parser.parse(json_elements));
+    checkAccessString("Initial configuration", parser.getDbAccessParameters(),
+                      config1);
+
+    // Applying a wholesale change will cause the access string to change
+    // to a representation of the new configuration.
+    json_config = toJson(config2);
+    json_elements = Element::fromJSON(json_config);
+    EXPECT_TRUE(json_elements);
+
+    EXPECT_NO_THROW(parser.parse(json_elements));
+    checkAccessString("Subsequent configuration", parser.getDbAccessParameters(),
+                      config2);
+
+    // Applying an incremental change will cause the representation to change
+    // incrementally.
+    json_config = toJson(incremental2);
+    json_elements = Element::fromJSON(json_config);
+    EXPECT_TRUE(json_elements);
+
+    EXPECT_NO_THROW(parser.parse(json_elements));
+    checkAccessString("Incremental configuration", parser.getDbAccessParameters(),
+                      config3);
+
+    // Applying the next incremental change should cause an exception to be
+    // thrown and there be no change to the access string.
+    json_config = toJson(incremental3);
+    json_elements = Element::fromJSON(json_config);
+    EXPECT_TRUE(json_elements);
+
+    EXPECT_THROW(parser.parse(json_elements), DbConfigError);
+    checkAccessString("Incompatible incremental change", parser.getDbAccessParameters(),
+                      config3);
+
+    // Applying an incremental change will cause the representation to change
+    // incrementally.
+    json_config = toJson(incremental4);
+    json_elements = Element::fromJSON(json_config);
+    EXPECT_TRUE(json_elements);
+
+    EXPECT_NO_THROW(parser.parse(json_elements));
+    checkAccessString("Compatible incremental change", parser.getDbAccessParameters(),
+                      config4);
+}
+
+// Check that the database access string is constructed correctly.
+TEST_F(DbAccessParserTest, getDbAccessString) {
+    const char* config[] = {"type",     "mysql",
+                            "host",     "",
+                            "name",     "keatest",
+                            "password", "password with spaces",
+                            NULL};
+
+    string json_config = toJson(config);
+    ConstElementPtr json_elements = Element::fromJSON(json_config);
+    EXPECT_TRUE(json_elements);
+
+    TestDbAccessParser parser;
+    EXPECT_NO_THROW(parser.parse(json_elements));
+
+    // Get the database access string
+    std::string dbaccess = parser.getDbAccessString();
+
+    // String should be either "type=mysql name=keatest" or
+    // "name=keatest type=mysql". The "host" entry is null, so should not be
+    // output.
+    EXPECT_EQ(dbaccess, "name=keatest password='password with spaces' type=mysql");
+}
+
+// Check that the configuration is accepted for the valid value
+// of "readonly".
+TEST_F(DbAccessParserTest, validReadOnly) {
+    const char* config[] = {"type", "mysql",
+                            "user", "keatest",
+                            "password", "keatest",
+                            "name", "keatest",
+                            "readonly", "true",
+                            NULL};
+
+    string json_config = toJson(config);
+    ConstElementPtr json_elements = Element::fromJSON(json_config);
+    EXPECT_TRUE(json_elements);
+
+    TestDbAccessParser parser;
+    EXPECT_NO_THROW(parser.parse(json_elements));
+
+    checkAccessString("Valid readonly parameter",
+                      parser.getDbAccessParameters(),
+                      config);
+}
+
+// Check that for the invalid value of the "readonly" parameter
+// an exception is thrown.
+TEST_F(DbAccessParserTest, invalidReadOnly) {
+    const char* config[] = {"type", "mysql",
+                            "user", "keatest",
+                            "password", "keatest",
+                            "name", "keatest",
+                            "readonly", "1",
+                            NULL};
+
+    string json_config = toJson(config);
+    ConstElementPtr json_elements = Element::fromJSON(json_config);
+    EXPECT_TRUE(json_elements);
+
+    TestDbAccessParser parser;
+    EXPECT_THROW(parser.parse(json_elements), DbConfigError);
+}
+
+// Check that multiple host storages are correctly parsed.
+TEST_F(DbAccessParserTest, multipleHost) {
+    const char* config1[] = {"type", "mysql",
+                             "name", "keatest1",
+                             NULL};
+    const char* config2[] = {"type", "mysql",
+                             "name", "keatest2",
+                             NULL};
+
+    string json_config1 = toJson(config1);
+    string json_config2 = toJson(config2);
+    ConstElementPtr json_elements1 = Element::fromJSON(json_config1);
+    ConstElementPtr json_elements2 = Element::fromJSON(json_config2);
+
+    TestDbAccessParser parser1;
+    TestDbAccessParser parser2;
+    EXPECT_NO_THROW(parser1.parse(json_elements1));
+    EXPECT_NO_THROW(parser2.parse(json_elements2));
+
+    checkAccessString("First config",
+                      parser1.getDbAccessParameters(),
+                      config1);
+    checkAccessString("Second config",
+                      parser2.getDbAccessParameters(),
+                      config2);
+}
+
+};  // Anonymous namespace
diff --git a/src/lib/database/tests/run_unittests.cc b/src/lib/database/tests/run_unittests.cc
new file mode 100644
index 0000000..4e83d4b
--- /dev/null
+++ b/src/lib/database/tests/run_unittests.cc
@@ -0,0 +1,20 @@
+// Copyright (C) 2018 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/database/tests/server_selector_unittest.cc b/src/lib/database/tests/server_selector_unittest.cc
new file mode 100644
index 0000000..00328ba
--- /dev/null
+++ b/src/lib/database/tests/server_selector_unittest.cc
@@ -0,0 +1,77 @@
+// Copyright (C) 2018-2019 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/server_tag.h>
+#include <database/server_selector.h>
+#include <gtest/gtest.h>
+
+using namespace isc::data;
+using namespace isc::db;
+
+namespace {
+
+// Check that server selector can be set to UNASSIGNED.
+TEST(ServerSelectorTest, unassigned) {
+    ServerSelector selector = ServerSelector::UNASSIGNED();
+    EXPECT_EQ(ServerSelector::Type::UNASSIGNED, selector.getType());
+    EXPECT_TRUE(selector.amUnassigned());
+    EXPECT_TRUE(selector.hasNoTags());
+    EXPECT_FALSE(selector.hasMultipleTags());
+}
+
+// Check that server selector can be set to ALL.
+TEST(ServerSelectorTest, all) {
+    ServerSelector selector = ServerSelector::ALL();
+    EXPECT_EQ(ServerSelector::Type::ALL, selector.getType());
+    EXPECT_FALSE(selector.amUnassigned());
+
+    EXPECT_FALSE(selector.hasNoTags());
+    auto tags = selector.getTags();
+    EXPECT_EQ(1, tags.size());
+    EXPECT_EQ(1, tags.count(ServerTag("all")));
+    EXPECT_TRUE(selector.amAll());
+    EXPECT_FALSE(selector.hasMultipleTags());
+}
+
+// Check that a single server can be selected.
+TEST(ServerSelectorTest, one) {
+    ServerSelector selector = ServerSelector::ONE("some-tag");
+    EXPECT_EQ(ServerSelector::Type::SUBSET, selector.getType());
+    EXPECT_FALSE(selector.amUnassigned());
+
+    EXPECT_FALSE(selector.hasNoTags());
+    auto tags = selector.getTags();
+    ASSERT_EQ(1, tags.size());
+    EXPECT_EQ(1, tags.count(ServerTag("some-tag")));
+    EXPECT_FALSE(selector.hasMultipleTags());
+}
+
+// Check that multiple servers can be selected.
+TEST(ServerSelectorTest, multiple) {
+    ServerSelector selector = ServerSelector::MULTIPLE({ "tag1", "tag2", "tag3" });
+    EXPECT_EQ(ServerSelector::Type::SUBSET, selector.getType());
+    EXPECT_FALSE(selector.amUnassigned());
+
+    EXPECT_FALSE(selector.hasNoTags());
+    auto tags = selector.getTags();
+    ASSERT_EQ(3, tags.size());
+    EXPECT_EQ(1, tags.count(ServerTag("tag1")));
+    EXPECT_EQ(1, tags.count(ServerTag("tag2")));
+    EXPECT_EQ(1, tags.count(ServerTag("tag3")));
+    EXPECT_TRUE(selector.hasMultipleTags());
+}
+
+// Check that server selector can be set to ANY.
+TEST(ServerSelectorTest, any) {
+    ServerSelector selector = ServerSelector::ANY();
+    EXPECT_EQ(ServerSelector::Type::ANY, selector.getType());
+    EXPECT_FALSE(selector.amUnassigned());
+
+    EXPECT_TRUE(selector.hasNoTags());
+}
+
+}
diff --git a/src/lib/database/tests/server_unittest.cc b/src/lib/database/tests/server_unittest.cc
new file mode 100644
index 0000000..63e189b
--- /dev/null
+++ b/src/lib/database/tests/server_unittest.cc
@@ -0,0 +1,85 @@
+// Copyright (C) 2019 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/server_collection.h>
+#include <testutils/test_to_element.h>
+#include <exceptions/exceptions.h>
+#include <gtest/gtest.h>
+#include <string>
+
+using namespace isc;
+using namespace isc::data;
+using namespace isc::db;
+
+namespace {
+
+// Tests the constructor of the Server.
+TEST(ServerTest, constructor) {
+    ServerPtr server;
+
+    ASSERT_NO_THROW(
+        server = Server::create(ServerTag("xyz"), "my first server")
+    );
+    ASSERT_TRUE(server);
+    EXPECT_EQ("xyz", server->getServerTagAsText());
+    EXPECT_EQ("my first server", server->getDescription());
+}
+
+// Tests that too long description is rejected.
+TEST(ServerTest, tooLongDescription) {
+    EXPECT_THROW(Server::create(ServerTag("xyz"), std::string(65537, 'c')),
+                 BadValue);
+}
+
+// Tests that toElement method returns expected JSON map.
+TEST(ServerTest, toElement) {
+    ServerPtr server1 = Server::create(ServerTag("foo"), "a server");
+    std::string expected1 = "{"
+        "\"server-tag\": \"foo\","
+        "\"description\": \"a server\""
+        " }";
+    isc::test::runToElementTest<Server>(expected1, *server1);
+
+    ServerPtr server2 = Server::create(ServerTag("bar"));
+    std::string expected2= "{"
+        "\"server-tag\": \"bar\","
+        "\"description\": \"\""
+        " }";
+    isc::test::runToElementTest<Server>(expected2, *server2);
+}
+
+// Tests that it is possible to fetch server by tag from the collection.
+TEST(ServerFetcherTest, getByTag) {
+    ServerCollection servers;
+
+    EXPECT_TRUE(servers.insert(Server::create(ServerTag("alpha"), "alpha description")).second);
+    EXPECT_TRUE(servers.insert(Server::create(ServerTag("beta"), "beta description")).second);
+    EXPECT_TRUE(servers.insert(Server::create(ServerTag("gamma"), "gamma description")).second);
+
+    // Inserting an element with duplicated server tag should be unsuccessful.
+    EXPECT_FALSE(servers.insert(Server::create(ServerTag("gamma"), "gamma 2 description")).second);
+
+    auto alpha = ServerFetcher::get(servers, ServerTag("alpha"));
+    ASSERT_TRUE(alpha);
+    EXPECT_EQ("alpha", alpha->getServerTagAsText());
+    EXPECT_EQ("alpha description", alpha->getDescription());
+
+    auto beta = ServerFetcher::get(servers, ServerTag("beta"));
+    ASSERT_TRUE(beta);
+    EXPECT_EQ("beta", beta->getServerTagAsText());
+    EXPECT_EQ("beta description", beta->getDescription());
+
+    auto gamma = ServerFetcher::get(servers, ServerTag("gamma"));
+    ASSERT_TRUE(gamma);
+    EXPECT_EQ("gamma", gamma->getServerTagAsText());
+    EXPECT_EQ("gamma description", gamma->getDescription());
+
+    // Null pointer should be returned when a given server does not exist.
+    EXPECT_FALSE(ServerFetcher::get(servers, ServerTag("non-existent")));
+}
+
+}
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/database/tests
parent	Initial commit. (diff)
download	isc-kea-upstream.tar.xz isc-kea-upstream.zip