Assert.assertTrue(stmt.isWrapperFor(java.sql.PreparedStatement.class));
Assert.assertNotNull(stmt.unwrap(java.sql.PreparedStatement.class));
ResultSet rs = stmt.executeQuery();
Assert.assertNotNull(rs.unwrap(oracle.jdbc.OracleResultSet.class));
Assert.assertTrue(rs.isWrapperFor(oracle.jdbc.OracleResultSet.class));
Assert.assertTrue(rs.isWrapperFor(DruidPooledResultSet.class));
Assert.assertNotNull(rs.unwrap(DruidPooledResultSet.class));