/**
    *    Copyright 2009-2019 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.util.List;
  
  import org.apache.ibatis.BaseDataTest;
  import org.apache.ibatis.io.Resources;
  import org.apache.ibatis.session.SqlSession;
  import org.apache.ibatis.session.SqlSessionFactory;
  import org.apache.ibatis.session.SqlSessionFactoryBuilder;
  import org.junit.jupiter.api.Assertions;
  import org.junit.jupiter.api.BeforeAll;
  import org.junit.jupiter.api.Test;
  
  class NestedResultHandlerMultipleAssociationTest {
  
    private static SqlSessionFactory sqlSessionFactory;
  
    @BeforeAll
    static void setUp() throws Exception {
      // create an SqlSessionFactory
      try (Reader reader = Resources
          .getResourceAsReader("org/apache/ibatis/submitted/nestedresulthandler_multiple_association/mybatis-config.xml")) {
        sqlSessionFactory = new SqlSessionFactoryBuilder().build(reader);
      }
  
      // populate in-memory database
      BaseDataTest.runScript(sqlSessionFactory.getConfiguration().getEnvironment().getDataSource(),
              "org/apache/ibatis/submitted/nestedresulthandler_multiple_association/CreateDB.sql");
    }
  
    @Test
    void failure() {
      try (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()) {
            Assertions.assertNotNull(childs);
            Assertions.assertNotNull(childs.getOne());
            Assertions.assertNotNull(childs.getTwo());
          }
        }
      }
    }
  
    @Test
    void success() {
      try (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()) {
          Assertions.assertNotNull(childs);
          Assertions.assertNotNull(childs.getOne());
          Assertions.assertNotNull(childs.getTwo());
        }
      }
    }
  
  }