/*
    *    Copyright 2009-2021 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.cglib_lazy_error;
  
  import java.io.Reader;
  
  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 CglibNPELazyTest {
  
    private static SqlSessionFactory sqlSessionFactory;
  
    @BeforeAll
    static void initDatabase() throws Exception {
      try (Reader reader = Resources.getResourceAsReader("org/apache/ibatis/submitted/cglib_lazy_error/ibatisConfigLazy.xml")) {
        sqlSessionFactory = new SqlSessionFactoryBuilder().build(reader);
        sqlSessionFactory.getConfiguration().setLazyLoadingEnabled(true);
        sqlSessionFactory.getConfiguration().setAggressiveLazyLoading(false);
      }
  
      BaseDataTest.runScript(sqlSessionFactory.getConfiguration().getEnvironment().getDataSource(),
              "org/apache/ibatis/submitted/cglib_lazy_error/CreateDB.sql");
    }
  
    @Test
    void testNoParent() {
      try (SqlSession sqlSession = sqlSessionFactory.openSession()) {
        PersonMapper personMapper = sqlSession.getMapper(PersonMapper.class);
        Person person = personMapper.selectById(1);
        Assertions.assertNotNull(person, "Persons must not be null");
        Person parent = person.getParent();
        Assertions.assertNull(parent, "Parent must be null");
      }
    }
  
    @Test
    void testAncestorSelf() {
      try (SqlSession sqlSession = sqlSessionFactory.openSession()) {
        PersonMapper personMapper = sqlSession.getMapper(PersonMapper.class);
        Person person = personMapper.selectById(1);
        Assertions.assertNotNull(person, "Persons must not be null");
        Person ancestor = person.getAncestor();
        Assertions.assertEquals(person, ancestor, "Ancestor must be John Smith sr.");
      }
    }
  
    @Test
    void testAncestorAfterQueryingParents() {
      try (SqlSession sqlSession = sqlSessionFactory.openSession()) {
        PersonMapper personMapper = sqlSession.getMapper(PersonMapper.class);
        Person expectedAncestor = personMapper.selectById(1);
        Person person = personMapper.selectById(3);
        // Load ancestor indirectly.
        Assertions.assertNotNull(person, "Persons must not be null");
        Assertions.assertNotNull(person.getParent(), "Parent must not be null");
        Assertions.assertNotNull(person.getParent().getParent(), "Grandparent must not be null");
        Assertions.assertEquals(expectedAncestor, person.getAncestor(), "Ancestor must be John Smith sr.");
      }
    }
  
    @Test
    void testGrandParent() {
      try (SqlSession sqlSession = sqlSessionFactory.openSession()) {
        PersonMapper personMapper = sqlSession.getMapper(PersonMapper.class);
        Person expectedParent = personMapper.selectById(2);
        Person expectedGrandParent = personMapper.selectById(1);
        Person person = personMapper.selectById(3);
        Assertions.assertNotNull(person, "Persons must not be null");
        final Person actualParent = person.getParent();
        final Person actualGrandParent = person.getParent().getParent();
        Assertions.assertEquals(expectedParent, actualParent);
        Assertions.assertEquals(expectedGrandParent, actualGrandParent);
      }
    }
  
    @Test
    void testAncestor() {
      try (SqlSession sqlSession = sqlSessionFactory.openSession()) {
        PersonMapper personMapper = sqlSession.getMapper(PersonMapper.class);
       Person expectedAncestor = personMapper.selectById(1);
       Person person = personMapper.selectById(3);
       Assertions.assertNotNull(person, "Persons must not be null");
       final Person actualAncestor = person.getAncestor();
       Assertions.assertEquals(expectedAncestor, actualAncestor);
     }
   }
 
 }