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1   /*
2    *    Copyright 2009-2021 the original author or authors.
3    *
4    *    Licensed under the Apache License, Version 2.0 (the "License");
5    *    you may not use this file except in compliance with the License.
6    *    You may obtain a copy of the License at
7    *
8    *       http://www.apache.org/licenses/LICENSE-2.0
9    *
10   *    Unless required by applicable law or agreed to in writing, software
11   *    distributed under the License is distributed on an "AS IS" BASIS,
12   *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   *    See the License for the specific language governing permissions and
14   *    limitations under the License.
15   */
16  package org.apache.ibatis.submitted.discriminator;
17  
18  import static org.junit.jupiter.api.Assertions.*;
19  
20  import java.io.Reader;
21  import java.util.List;
22  
23  import org.apache.ibatis.BaseDataTest;
24  import org.apache.ibatis.io.Resources;
25  import org.apache.ibatis.session.SqlSession;
26  import org.apache.ibatis.session.SqlSessionFactory;
27  import org.apache.ibatis.session.SqlSessionFactoryBuilder;
28  import org.junit.jupiter.api.BeforeAll;
29  import org.junit.jupiter.api.Test;
30  
31  class DiscriminatorTest {
32  
33    private static SqlSessionFactory sqlSessionFactory;
34  
35    @BeforeAll
36    static void setUp() throws Exception {
37      // create an SqlSessionFactory
38      try (Reader reader = Resources.getResourceAsReader("org/apache/ibatis/submitted/discriminator/mybatis-config.xml")) {
39        sqlSessionFactory = new SqlSessionFactoryBuilder().build(reader);
40      }
41  
42      // populate in-memory database
43      BaseDataTest.runScript(sqlSessionFactory.getConfiguration().getEnvironment().getDataSource(),
44        "org/apache/ibatis/submitted/discriminator/CreateDB.sql");
45    }
46  
47    @Test
48    void shouldSwitchResultType() {
49      try (SqlSession sqlSession = sqlSessionFactory.openSession()) {
50        Mapper mapper = sqlSession.getMapper(Mapper.class);
51        List<Vehicle> vehicles = mapper.selectVehicles();
52        assertEquals(Car.class, vehicles.get(0).getClass());
53        assertEquals(Integer.valueOf(5), ((Car)vehicles.get(0)).getDoorCount());
54        assertEquals(Truck.class, vehicles.get(1).getClass());
55        assertEquals(Float.valueOf(1.5f), ((Truck)vehicles.get(1)).getCarryingCapacity());
56      }
57    }
58  
59    @Test
60    void shouldInheritResultType() {
61      // #486
62      try (SqlSession sqlSession = sqlSessionFactory.openSession()) {
63        Mapper mapper = sqlSession.getMapper(Mapper.class);
64        List<Owner> owners = mapper.selectOwnersWithAVehicle();
65        assertEquals(Truck.class, owners.get(0).getVehicle().getClass());
66        assertEquals(Car.class, owners.get(1).getVehicle().getClass());
67      }
68    }
69  
70  }