[3779] Added additional tests per review

fqdn_unittest.cc
    TEST_F(NameDhcpv4SrvTest, emptyFqdn) - now also verifies that the
    lease is added to the database following a REQUEST and that when
    it is retrieved from the database its hostname matches the generated FQDN.

src/bin/dhcp4/tests/fqdn_unittest.cc

@@ -1331,9 +1331,13 @@ TEST_F(NameDhcpv4SrvTest, hostnameReservation) {
 }
 
 // Test verifies that the server properly generates a FQDN when the client
-// FQDN name is blank, whether or not DDNS updates are enabled.
+// FQDN name is blank, whether or not DDNS updates are enabled.  It also
+// verifies that the lease is only in the database following a REQUEST and
+// that the lesae contains the generated FQDN.
 TEST_F(NameDhcpv4SrvTest, emptyFqdn) {
     Dhcp4Client client(Dhcp4Client::SELECTING);
+    isc::asiolink::IOAddress expectedAddress("10.0.0.10");
+    std::string expectedFqdn("myhost-10-0-0-10.fake-suffix.isc.org.");
 
     // Load a configuration with DDNS updates disabled
     configure(CONFIGS[2], *client.getServer());
@@ -1357,11 +1361,15 @@ TEST_F(NameDhcpv4SrvTest, emptyFqdn) {
     Option4ClientFqdnPtr fqdn;
     fqdn = boost::dynamic_pointer_cast<Option4ClientFqdn>(resp->getOption(DHO_FQDN));
     ASSERT_TRUE(fqdn);
-    EXPECT_EQ("myhost-10-0-0-10.fake-suffix.isc.org.", fqdn->getDomainName());
+    EXPECT_EQ(expectedFqdn, fqdn->getDomainName());
     checkFqdnFlags(resp, (Option4ClientFqdn::FLAG_N |
                           Option4ClientFqdn::FLAG_E |
                           Option4ClientFqdn::FLAG_O));
 
+    // Make sure the lease is NOT in the database.
+    Lease4Ptr lease = LeaseMgrFactory::instance().getLease4(IOAddress(expectedAddress));
+    ASSERT_FALSE(lease);
+
     // Now test with updates enabled
     configure(CONFIGS[3], *client.getServer());
     ASSERT_TRUE(CfgMgr::instance().ddnsEnabled());
@@ -1379,10 +1387,35 @@ TEST_F(NameDhcpv4SrvTest, emptyFqdn) {
     // correct for updates enabled.
     fqdn = boost::dynamic_pointer_cast<Option4ClientFqdn>(resp->getOption(DHO_FQDN));
     ASSERT_TRUE(fqdn);
-    EXPECT_EQ("myhost-10-0-0-10.fake-suffix.isc.org.", fqdn->getDomainName());
+    EXPECT_EQ(expectedFqdn, fqdn->getDomainName());
     checkFqdnFlags(resp, (Option4ClientFqdn::FLAG_E |
                           Option4ClientFqdn::FLAG_S));
 
+    // Make sure the lease is NOT in the database.
+    lease = LeaseMgrFactory::instance().getLease4(IOAddress(expectedAddress));
+    ASSERT_FALSE(lease);
+
+    // Do a DORA and verify that the lease exists and the name is correct.
+    ASSERT_NO_THROW(client.doDORA());
+
+    // Make sure that the server responded.
+    resp = client.getContext().response_;
+    ASSERT_TRUE(resp);
+    ASSERT_EQ(DHCPACK, static_cast<int>(resp->getType()));
+
+    // Make sure the response FQDN has the generated name and FQDN flags are
+    // correct for updates enabled.
+    fqdn = boost::dynamic_pointer_cast<Option4ClientFqdn>(resp->getOption(DHO_FQDN));
+    ASSERT_TRUE(fqdn);
+    EXPECT_EQ(expectedFqdn, fqdn->getDomainName());
+    checkFqdnFlags(resp, (Option4ClientFqdn::FLAG_E |
+                          Option4ClientFqdn::FLAG_S));
+
+    // Make sure the lease is in the database and hostname is correct.
+    lease = LeaseMgrFactory::instance().getLease4(IOAddress(expectedAddress));
+    ASSERT_TRUE(lease);
+    EXPECT_EQ(expectedFqdn, lease->hostname_);
+
 }
 
 } // end of anonymous namespace