NestedResultHandlerMultipleAssociationTest.java

/**
 *    Copyright 2009-2015 the original author or authors.
 *
 *    Licensed under the Apache License, Version 2.0 (the "License");
 *    you may not use this file except in compliance with the License.
 *    You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing, software
 *    distributed under the License is distributed on an "AS IS" BASIS,
 *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *    See the License for the specific language governing permissions and
 *    limitations under the License.
 */
package org.apache.ibatis.submitted.nestedresulthandler_multiple_association;

import java.io.Reader;
import java.sql.Connection;
import java.util.List;

import org.apache.ibatis.io.Resources;
import org.apache.ibatis.jdbc.ScriptRunner;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
import org.junit.Assert;
import org.junit.BeforeClass;
import org.junit.Test;

public class NestedResultHandlerMultipleAssociationTest {

  private static SqlSessionFactory sqlSessionFactory;

  @BeforeClass
  public static void setUp() throws Exception {
    // create an SqlSessionFactory
    Reader reader = Resources
        .getResourceAsReader("org/apache/ibatis/submitted/nestedresulthandler_multiple_association/mybatis-config.xml");
    sqlSessionFactory = new SqlSessionFactoryBuilder().build(reader);
    reader.close();

    // populate in-memory database
    SqlSession session = sqlSessionFactory.openSession();
    Connection conn = session.getConnection();
    reader = Resources
        .getResourceAsReader("org/apache/ibatis/submitted/nestedresulthandler_multiple_association/CreateDB.sql");
    ScriptRunner runner = new ScriptRunner(conn);
    runner.setLogWriter(null);
    runner.runScript(reader);
    reader.close();
    session.close();
  }

  @Test
  public void failure() throws Exception {
    SqlSession sqlSession = sqlSessionFactory.openSession();

    // Parents have child going from somewhere to somewhere, they are stored in
    // a Binome object
    // In this test we have 2 parents:
    // Parent1 is going from Child1 to Child2
    // Parent2 is going from Child2 to Child3 and from Child1 to Child2
    // You'll see a NULL entry in the list instead of the Binome Child1/Child2
    List<ParentBean> list = sqlSession.selectList("selectParentBeans");
    for (ParentBean pb : list) {
      for (Binome<ChildBean, ChildBean> childs : pb.getChilds()) {
        Assert.assertNotNull(childs);
        Assert.assertNotNull(childs.getOne());
        Assert.assertNotNull(childs.getTwo());
      }
    }

    sqlSession.close();
  }

  @Test
  public void success() throws Exception {
    SqlSession sqlSession = sqlSessionFactory.openSession();

    ParentBean parent = sqlSession.selectOne("selectParentBeanById", 2);

    // If you only select the Parent2 it works
    for (Binome<ChildBean, ChildBean> childs : parent.getChilds()) {
      Assert.assertNotNull(childs);
      Assert.assertNotNull(childs.getOne());
      Assert.assertNotNull(childs.getTwo());
    }
    sqlSession.close();
  }

}