junit单元测试3：springockito

       接http://baowp.iteye.com/blog/1988249，前文举例了一个使用mockito在spring管理的实例中注入一个mock对象的情况，但是仅限于直接引用的对象且要写MockitoAnnotations.initMocks(this)使其生效。

       如何能够与spring结合得更深，就像是注入spring bean一样地注入mock对象，这样对于写包含外部依赖的单元测试会完美些。如下：

    

  单例类，测的是bookService.list()：

package com.iteye.baowp.domain.service;

import com.iteye.baowp.domain.entity.BookEntity;
import com.iteye.baowp.domain.reference.RemoteService;
import com.iteye.baowp.domain.repository.BookRepository;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.kubek2k.springockito.annotations.ReplaceWithMock;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

import javax.annotation.Resource;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertSame;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;

/**
 * Created with IntelliJ IDEA.
 * User: baowp
 * Date: 12/7/13
 * Time: 10:26 AM
 */
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(locations = {"BookServiceTest-context.xml", "spring-mockito.xml"})
public class SpringockitoXmlMockTest {

    @Resource
    private BookService bookService;

    @ReplaceWithMock
    @Resource
    private RemoteService remoteService;

    @ReplaceWithMock
    @Resource
    private BookRepository bookRepository;

    @Test
    public void testList() {
        //构造一个结果集
        BookEntity book = new BookEntity();
        book.setTitle("title");
        book.setPrice(1.1f);
        List<BookEntity> books = new ArrayList<BookEntity>();
        books.add(book);

        {//设置方法返回的期望结果
            when(bookRepository.list()).thenReturn(Collections.<BookEntity>emptyList());
            when(remoteService.remoteBooks()).thenReturn(books);
        }

        List<BookEntity> list = bookService.list();
        assertEquals(1, list.size());
        assertSame(book, list.get(0));

        verify(bookRepository).list();//断言bookRespotitory.list()被调用一次
        verify(remoteService).remoteBooks();//断言remoteService.remoteBooks()被调用一次
    }
}

 功能实现类，里面注入的两个bean在上文中调用时已经被mock，将返回期望的结果：

package com.iteye.baowp.domain.service.impl;

import com.iteye.baowp.domain.entity.BookEntity;
import com.iteye.baowp.domain.reference.RemoteService;
import com.iteye.baowp.domain.repository.BookRepository;
import com.iteye.baowp.domain.service.BookService;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import java.util.List;

/**
 * Created with IntelliJ IDEA.
 * User: baowp
 * Date: 11/27/13
 * Time: 3:04 PM
 */
@Service("bookService")
public class BookServiceImpl implements BookService {

    @Resource
    private BookRepository bookRepository;
    @Resource
    private RemoteService remoteService;

    public List<BookEntity> list() {
        List<BookEntity> list = bookRepository.list();
        if (list.isEmpty()) {
            list = remoteService.remoteBooks();
        }
        return list;
    }

}

 

        springockito圆满地解决了上篇中提到的缺陷，该maven依赖会自动引入mockito。@ReplaceWithMock @Resource联合标注的为mock对象，并注入为spring bean，无论它被哪个spring bean引用（包括间接引用），都能够正确注入。

 

        BookServiceTest-context.xml是一个正常的spring配置文件，spring-mockito.xml是mock bean的配置文件，加载这两个配置文件的时候，如果有同名beanId将以mock bean为准。

 

   spring-mockito.xml:

<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:mockito="http://www.mockito.org/spring/mockito"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
        http://www.mockito.org/spring/mockito https://bitbucket.org/kubek2k/springockito/raw/tip/springockito/src/main/resources/spring/mockito.xsd">

    <mockito:mock id="remoteService" class="com.iteye.baowp.domain.reference.RemoteService" />
    <mockito:mock id="bookRepository" class="com.iteye.baowp.domain.repository.BookRepository" />
</beans>

 

  maven usage:    

        <dependency>
            <groupId>org.kubek2k</groupId>
            <artifactId>springockito</artifactId>
            <version>1.0.9</version>
            <scope>test</scope>
        </dependency>

 

          单元测试预期已经达到，但是每次写单测多出来一个spring-mockito.xml的配置文件，有一个小冗余。