[1067] Tests for SQLite3 iterator context

Just loads and iterates single-record zone.

src/lib/datasrc/sqlite3_connection.cc

@@ -318,5 +318,10 @@ SQLite3Connection::getZone(const isc::dns::Name& name) const {
     return (result);
 }
 
+DatabaseConnection::IteratorContextPtr
+SQLite3Connection::getIteratorContext(const isc::dns::Name&, int) const {
+    return IteratorContextPtr();
+}
+
 }
 }

src/lib/datasrc/sqlite3_connection.h

@@ -94,6 +94,8 @@ public:
      *     element and the zone id in the second if it was.
      */
     virtual std::pair<bool, int> getZone(const isc::dns::Name& name) const;
+    virtual IteratorContextPtr getIteratorContext(const isc::dns::Name&,
+                                                  int id) const;
 private:
     /// \brief Private database data
     SQLite3Parameters* dbparameters_;

src/lib/datasrc/tests/sqlite3_connection_unittest.cc

@@ -113,4 +113,28 @@ TEST_F(SQLite3Conn, noClass) {
     EXPECT_FALSE(conn->getZone(Name("example.com")).first);
 }
 
+// This tests the iterator context
+TEST_F(SQLite3Conn, iterator) {
+    // Our test zone is conveniently small, but not empty
+    initConn(SQLITE_DBFILE_EXAMPLE2, RRClass::IN());
+
+    // Get the iterator context
+    DatabaseConnection::IteratorContextPtr
+        context(conn->getIteratorContext(Name("example2.com"), 1));
+    ASSERT_NE(DatabaseConnection::IteratorContextPtr(),
+              context);
+
+    std::string name, rtype, data;
+    int ttl;
+    // Get and check the first and only record
+    EXPECT_TRUE(context->getNext(name, rtype, ttl, data));
+    EXPECT_EQ("example2.com.", name);
+    EXPECT_EQ("SOA", rtype);
+    EXPECT_EQ("master.example2.com. admin.example2.com. "
+              "1234 3600 1800 2419200 7200", data);
+    EXPECT_EQ(3600, ttl);
+    // Check there's no other
+    EXPECT_FALSE(context->getNext(name, rtype, ttl, data));
+}
+
 }