/*
    *    Copyright 2009-2023 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
    *
    *       https://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.empty_row;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertNotNull;
  import static org.junit.jupiter.api.Assertions.assertNull;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  import java.io.Reader;
  import java.util.Map;
  
  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.BeforeAll;
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  
  class ReturnInstanceForEmptyRowTest {
  
    private static SqlSessionFactory sqlSessionFactory;
  
    @BeforeAll
    static void setUp() throws Exception {
      // create an SqlSessionFactory
      try (Reader reader = Resources.getResourceAsReader("org/apache/ibatis/submitted/empty_row/mybatis-config.xml")) {
        sqlSessionFactory = new SqlSessionFactoryBuilder().build(reader);
      }
  
      // populate in-memory database
      BaseDataTest.runScript(sqlSessionFactory.getConfiguration().getEnvironment().getDataSource(),
          "org/apache/ibatis/submitted/empty_row/CreateDB.sql");
    }
  
    @BeforeEach
    void resetCallSettersOnNulls() {
      sqlSessionFactory.getConfiguration().setCallSettersOnNulls(false);
    }
  
    @Test
    void shouldSimpleTypeBeNull() {
      try (SqlSession sqlSession = sqlSessionFactory.openSession()) {
        Mapper mapper = sqlSession.getMapper(Mapper.class);
        String result = mapper.getString();
        assertNull(result);
      }
    }
  
    @Test
    void shouldObjectTypeNotBeNull() {
      try (SqlSession sqlSession = sqlSessionFactory.openSession()) {
        Mapper mapper = sqlSession.getMapper(Mapper.class);
        Parent parent = mapper.getBean(1);
        assertNotNull(parent);
      }
    }
  
    @Test
    void shouldMapBeEmpty() {
      try (SqlSession sqlSession = sqlSessionFactory.openSession()) {
        Mapper mapper = sqlSession.getMapper(Mapper.class);
        Map<String, String> map = mapper.getMap(1);
        assertNotNull(map);
        assertTrue(map.isEmpty());
      }
    }
  
    @Test
    void shouldMapHaveColumnNamesIfCallSettersOnNullsEnabled() {
      sqlSessionFactory.getConfiguration().setCallSettersOnNulls(true);
      try (SqlSession sqlSession = sqlSessionFactory.openSession()) {
        Mapper mapper = sqlSession.getMapper(Mapper.class);
        Map<String, String> map = mapper.getMap(1);
        assertEquals(2, map.size());
        assertTrue(map.containsKey("COL1"));
        assertTrue(map.containsKey("COL2"));
      }
    }
  
    @Test
    void shouldAssociationNotBeNull() {
      try (SqlSession sqlSession = sqlSessionFactory.openSession()) {
        Mapper mapper = sqlSession.getMapper(Mapper.class);
       Parent parent = mapper.getAssociation(1);
       assertNotNull(parent.getChild());
     }
   }
 
   @Test
   void shouldAssociationBeNullIfNotNullColumnSpecified() {
     try (SqlSession sqlSession = sqlSessionFactory.openSession()) {
       Mapper mapper = sqlSession.getMapper(Mapper.class);
       Parent parent = mapper.getAssociationWithNotNullColumn(1);
       assertNotNull(parent);
       assertNull(parent.getChild());
     }
   }
 
   @Test
   void shouldNestedAssociationNotBeNull() {
     // #420
     try (SqlSession sqlSession = sqlSessionFactory.openSession()) {
       Mapper mapper = sqlSession.getMapper(Mapper.class);
       Parent parent = mapper.getNestedAssociation();
       assertNotNull(parent.getChild().getGrandchild());
     }
   }
 
   @Test
   void testCollection() {
     try (SqlSession sqlSession = sqlSessionFactory.openSession()) {
       Mapper mapper = sqlSession.getMapper(Mapper.class);
       Parent parent = mapper.getCollection(1);
       assertEquals(1, parent.getChildren().size());
       assertNotNull(parent.getChildren().get(0));
     }
   }
 
   @Test
   void shouldSquashMultipleEmptyResults() {
     try (SqlSession sqlSession = sqlSessionFactory.openSession()) {
       Mapper mapper = sqlSession.getMapper(Mapper.class);
       Parent parent = mapper.getTwoCollections(2);
       assertEquals(1, parent.getPets().size());
       assertNotNull(parent.getPets().get(0));
     }
   }
 
   @Test
   void testConstructorAutomapping() {
     try (SqlSession sqlSession = sqlSessionFactory.openSession()) {
       Mapper mapper = sqlSession.getMapper(Mapper.class);
       ImmutableParent parent = mapper.selectImmutable(1);
       assertNotNull(parent);
     }
   }
 
   @Test
   void testArgNameBasedConstructorAutomapping() {
     sqlSessionFactory.getConfiguration().setArgNameBasedConstructorAutoMapping(true);
     try (SqlSession sqlSession = sqlSessionFactory.openSession()) {
       Mapper mapper = sqlSession.getMapper(Mapper.class);
       ImmutableParent parent = mapper.selectImmutable(1);
       assertNotNull(parent);
     }
   }
 }