import com.epam.rd.autocode.domain.Employee;

public class RowMapperFactory {
    public RowMapper<Employee> employeeRowMapper() {

        throw new UnsupportedOperationException();
    }
}

import java.sql.ResultSet;

public interface RowMapper<T> {
    T mapRow(ResultSet resultSet);

}

public class RowMapperTest {

    private static ConnectionSource connectionSource;

    @BeforeClass
    public static void initConnectionSource() {
        connectionSource = ConnectionSource.instance();
    }

    @Test
    public void employeeMapRowSingleTest() throws Exception {
        final RowMapper<Employee> employeeRowMapper = new RowMapperFactory().employeeRowMapper();

        try (final Connection conn = connectionSource.createConnection();
             final Statement statement = conn.createStatement();
             final ResultSet rs = statement.executeQuery("select * from EMPLOYEE where id = '7499'")) {

            rs.next();
            final Employee employee = employeeRowMapper.mapRow(rs);

            assertEquals(
                    new Employee(
                            new BigInteger("7499"),
                            new FullName("JOHN", "ALLEN", "MARIA"),
                            Position.SALESMAN,
                            LocalDate.of(1981, 2, 20),
                            new BigDecimal("1600")
                    ),
                    employee
            );
        }
    }