[1287] updated the mock iterator so that the first record will be A, and

in a subseuqnet it could miss SOA after update.
also cleanup the iterator test using checkRRset.

src/lib/datasrc/tests/database_unittest.cc

@@ -381,30 +381,36 @@ private:
             switch (step ++) {
                 case 0:
                     data[DatabaseAccessor::NAME_COLUMN] = "example.org";
+                    data[DatabaseAccessor::TYPE_COLUMN] = "A";
+                    data[DatabaseAccessor::TTL_COLUMN] = "3600";
+                    data[DatabaseAccessor::RDATA_COLUMN] = "192.0.2.1";
+                    return (true);
+                case 1:
+                    data[DatabaseAccessor::NAME_COLUMN] = "example.org";
                     data[DatabaseAccessor::TYPE_COLUMN] = "SOA";
                     data[DatabaseAccessor::TTL_COLUMN] = "3600";
                     data[DatabaseAccessor::RDATA_COLUMN] = "ns1.example.org. admin.example.org. "
                         "1234 3600 1800 2419200 7200";
                     return (true);
-                case 1:
+                case 2:
                     data[DatabaseAccessor::NAME_COLUMN] = "x.example.org";
                     data[DatabaseAccessor::TYPE_COLUMN] = "A";
                     data[DatabaseAccessor::TTL_COLUMN] = "300";
                     data[DatabaseAccessor::RDATA_COLUMN] = "192.0.2.1";
                     return (true);
-                case 2:
+                case 3:
                     data[DatabaseAccessor::NAME_COLUMN] = "x.example.org";
                     data[DatabaseAccessor::TYPE_COLUMN] = "A";
                     data[DatabaseAccessor::TTL_COLUMN] = "300";
                     data[DatabaseAccessor::RDATA_COLUMN] = "192.0.2.2";
                     return (true);
-                case 3:
+                case 4:
                     data[DatabaseAccessor::NAME_COLUMN] = "x.example.org";
                     data[DatabaseAccessor::TYPE_COLUMN] = "AAAA";
                     data[DatabaseAccessor::TTL_COLUMN] = "300";
                     data[DatabaseAccessor::RDATA_COLUMN] = "2001:db8::1";
                     return (true);
-                case 4:
+                case 5:
                     data[DatabaseAccessor::NAME_COLUMN] = "x.example.org";
                     data[DatabaseAccessor::TYPE_COLUMN] = "AAAA";
                     data[DatabaseAccessor::TTL_COLUMN] = "300";
@@ -413,7 +419,7 @@ private:
                 default:
                     ADD_FAILURE() <<
                         "Request past the end of iterator context";
-                case 5:
+                case 6:
                     return (false);
             }
         }
@@ -969,56 +975,64 @@ TEST_F(MockDatabaseClientTest, emptyIterator) {
     EXPECT_THROW(it->getNextRRset(), isc::Unexpected);
 }
 
+// checks if the given rrset matches the
+// given name, class, type and rdatas
+void
+checkRRset(isc::dns::ConstRRsetPtr rrset,
+           const isc::dns::Name& name,
+           const isc::dns::RRClass& rrclass,
+           const isc::dns::RRType& rrtype,
+           const isc::dns::RRTTL& rrttl,
+           const std::vector<std::string>& rdatas) {
+    isc::dns::RRsetPtr expected_rrset(
+        new isc::dns::RRset(name, rrclass, rrtype, rrttl));
+    for (unsigned int i = 0; i < rdatas.size(); ++i) {
+        expected_rrset->addRdata(
+            isc::dns::rdata::createRdata(rrtype, rrclass,
+                                         rdatas[i]));
+    }
+    isc::testutils::rrsetCheck(expected_rrset, rrset);
+}
+
 // Iterate through a zone
 TYPED_TEST(DatabaseClientTest, iterator) {
     ZoneIteratorPtr it(this->client_->getIterator(Name("example.org")));
     ConstRRsetPtr rrset(it->getNextRRset());
     ASSERT_NE(ConstRRsetPtr(), rrset);
 
+    // The first name should be the zone origin.
+    EXPECT_EQ(this->zname_, rrset->getName());
+
     // The rest of the checks work only for the mock accessor.
     if (!this->is_mock_) {
         return;
     }
 
-    EXPECT_EQ(Name("example.org"), rrset->getName());
-    EXPECT_EQ(RRClass::IN(), rrset->getClass());
-    EXPECT_EQ(RRType::SOA(), rrset->getType());
-    EXPECT_EQ(RRTTL(3600), rrset->getTTL());
-    RdataIteratorPtr rit(rrset->getRdataIterator());
-    ASSERT_FALSE(rit->isLast());
-    rit->next();
-    EXPECT_TRUE(rit->isLast());
+    this->expected_rdatas_.clear();
+    this->expected_rdatas_.push_back("192.0.2.1");
+    checkRRset(rrset, Name("example.org"), this->qclass_, RRType::A(),
+               this->rrttl_, this->expected_rdatas_);
 
     rrset = it->getNextRRset();
-    ASSERT_NE(ConstRRsetPtr(), rrset);
-    EXPECT_EQ(Name("x.example.org"), rrset->getName());
-    EXPECT_EQ(RRClass::IN(), rrset->getClass());
-    EXPECT_EQ(RRType::A(), rrset->getType());
-    EXPECT_EQ(RRTTL(300), rrset->getTTL());
-    rit = rrset->getRdataIterator();
-    ASSERT_FALSE(rit->isLast());
-    EXPECT_EQ("192.0.2.1", rit->getCurrent().toText());
-    rit->next();
-    ASSERT_FALSE(rit->isLast());
-    EXPECT_EQ("192.0.2.2", rit->getCurrent().toText());
-    rit->next();
-    EXPECT_TRUE(rit->isLast());
+    this->expected_rdatas_.clear();
+    this->expected_rdatas_.push_back("ns1.example.org. admin.example.org. "
+                                     "1234 3600 1800 2419200 7200");
+    checkRRset(rrset, Name("example.org"), this->qclass_, RRType::SOA(),
+               this->rrttl_, this->expected_rdatas_);
 
     rrset = it->getNextRRset();
-    ASSERT_NE(ConstRRsetPtr(), rrset);
-    EXPECT_EQ(Name("x.example.org"), rrset->getName());
-    EXPECT_EQ(RRClass::IN(), rrset->getClass());
-    EXPECT_EQ(RRType::AAAA(), rrset->getType());
-    EXPECT_EQ(RRTTL(300), rrset->getTTL());
-    EXPECT_EQ(ConstRRsetPtr(), it->getNextRRset());
-    rit = rrset->getRdataIterator();
-    ASSERT_FALSE(rit->isLast());
-    EXPECT_EQ("2001:db8::1", rit->getCurrent().toText());
-    rit->next();
-    ASSERT_FALSE(rit->isLast());
-    EXPECT_EQ("2001:db8::2", rit->getCurrent().toText());
-    rit->next();
-    EXPECT_TRUE(rit->isLast());
+    this->expected_rdatas_.clear();
+    this->expected_rdatas_.push_back("192.0.2.1");
+    this->expected_rdatas_.push_back("192.0.2.2");
+    checkRRset(rrset, Name("x.example.org"), this->qclass_, RRType::A(),
+               RRTTL(300), this->expected_rdatas_);
+
+    rrset = it->getNextRRset();
+    this->expected_rdatas_.clear();
+    this->expected_rdatas_.push_back("2001:db8::1");
+    this->expected_rdatas_.push_back("2001:db8::2");
+    checkRRset(rrset, Name("x.example.org"), this->qclass_, RRType::AAAA(),
+               RRTTL(300), this->expected_rdatas_);
 }
 
 // This has inconsistent TTL in the set (the rest, like nonsense in
@@ -1029,25 +1043,6 @@ TEST_F(MockDatabaseClientTest, badIterator) {
     EXPECT_EQ(it->getNextRRset()->getTTL(), isc::dns::RRTTL(300));
 }
 
-// checks if the given rrset matches the
-// given name, class, type and rdatas
-void
-checkRRset(isc::dns::ConstRRsetPtr rrset,
-           const isc::dns::Name& name,
-           const isc::dns::RRClass& rrclass,
-           const isc::dns::RRType& rrtype,
-           const isc::dns::RRTTL& rrttl,
-           const std::vector<std::string>& rdatas) {
-    isc::dns::RRsetPtr expected_rrset(
-        new isc::dns::RRset(name, rrclass, rrtype, rrttl));
-    for (unsigned int i = 0; i < rdatas.size(); ++i) {
-        expected_rrset->addRdata(
-            isc::dns::rdata::createRdata(rrtype, rrclass,
-                                         rdatas[i]));
-    }
-    isc::testutils::rrsetCheck(expected_rrset, rrset);
-}
-
 TYPED_TEST(DatabaseClientTest, getSOAFromIterator) {
     vector<string> soa_data;
     soa_data.push_back("ns1.example.org. admin.example.org. "