DaoTest.java

/**
 *    Copyright 2009-2016 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.emptycollection;

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.After;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;

public class DaoTest {
    private Dao dao;
    private SqlSession sqlSession;
    
    @Before
    public void setUp() throws Exception {
        Reader reader = Resources.getResourceAsReader("org/apache/ibatis/submitted/emptycollection/mybatis-config.xml");
        SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(reader);
        reader.close();

        sqlSession = sqlSessionFactory.openSession();
        Connection conn = sqlSession.getConnection();
        ScriptRunner runner = new ScriptRunner(conn);
        runner.setLogWriter(null);
        dao = sqlSession.getMapper(Dao.class);
    }

    @After
    public void tearDown() throws Exception {
        sqlSession.close();
    }

    @Test
    public void testWithEmptyList() throws Exception {
        final List<TodoLists> actual = dao.selectWithEmptyList();
        Assert.assertEquals(1, actual.size());
        final List<TodoItem> todoItems = actual.get(0).getTodoItems();
        Assert.assertEquals("expect " + todoItems + " to be empty", 0, todoItems.size());        
    }

    @Test
    public void testWithNonEmptyList() throws Exception {
        final List<TodoLists> actual = dao.selectWithNonEmptyList();
        checkNonEmptyList(actual);
    }

    @Test
    public void testWithNonEmptyList_noCollectionId() throws Exception {
        final List<TodoLists> actual = dao.selectWithNonEmptyList_noCollectionId();

        checkNonEmptyList(actual);
    }

    private void checkNonEmptyList(final List<TodoLists> actual) {
//        Assert.assertEquals("[List(1)=[a description(1), a 2nd description(2)], List(2)=[a description(1)]]", actual.toString());
        Assert.assertEquals(2, actual.size());

        Assert.assertEquals(2, actual.get(0).getTodoItems().size());
        Assert.assertEquals(1, actual.get(0).getTodoItems().get(0).getOrder());
        Assert.assertEquals("a description", actual.get(0).getTodoItems().get(0).getDescription().trim());
        Assert.assertEquals(2, actual.get(0).getTodoItems().get(1).getOrder());
        Assert.assertEquals("a 2nd description", actual.get(0).getTodoItems().get(1).getDescription().trim());

        Assert.assertEquals(1, actual.get(1).getTodoItems().size());
        Assert.assertEquals(1, actual.get(1).getTodoItems().get(0).getOrder());
        Assert.assertEquals("a description", actual.get(0).getTodoItems().get(0).getDescription().trim());
        
        // We should have gotten three item objects. The first item from the first list and the first item from
        // the second list have identical properties, but they should be distinct objects
        Assert.assertNotSame(actual.get(0).getTodoItems().get(0), actual.get(1).getTodoItems().get(0));
    }
}