这是一个JavaProject，有关EasyMock用法详见本文测试用例

 

首先是用到的实体类User.java

 

package com.jadyer.model;public class User {	private int id;	private String username;	private String password;		/*-- 三个属性的setter和getter略 --*/		public User(){}		public User(int id, String username, String password) {		this.id = id;		this.username = username;		this.password = password;	}}

下面是用到的两个Dao类

 

 

package com.jadyer.dao;import com.jadyer.model.User;public interface UserDao {	public User load(String username);		public void delete(String username);		public User save(User user);}/** * 用到的两个Dao类 */package com.jadyer.dao;public interface BlogDao {	public void update(String username);}

下面是用到的Service接口类

 

 

package com.jadyer.service;import com.jadyer.model.User;public interface UserService {	public User get(String username);		public User list(String username);		public void update(String username);		public User insert(User user);		public User login(String username, String password);}

下面是用到的Service接口实现类

 

 

package com.jadyer.service.impl;import com.jadyer.dao.BlogDao;import com.jadyer.dao.UserDao;import com.jadyer.model.User;import com.jadyer.service.UserService;public class UserServiceImpl implements UserService {	private UserDao userDao;	private BlogDao blogDao;		public UserServiceImpl(){}		public UserServiceImpl(UserDao userDao){		this.userDao = userDao;	}		public UserServiceImpl(UserDao userDao, BlogDao blogDao){		this.userDao = userDao;		this.blogDao = blogDao;	}	@Override	public User get(String username) {		return userDao.load(username);	}		@Override	public User list(String username) {		userDao.load("http://blog.csdn.net/jadyer");		userDao.delete(username);		return userDao.load(username);	}	@Override	public void update(String username) {		blogDao.update(username);		userDao.delete(username);	}	@Override	public User insert(User user) {		if(null != userDao.load(user.getUsername())){			throw new RuntimeException("用户[" + user.getUsername() + "]已存在");		}		return userDao.save(user);	}	@Override	public User login(String username, String password) {		User user = userDao.load(username);		if(null == user){			throw new RuntimeException("用户[" + username + "]不存在");		}		if(!user.getPassword().equals(password)){			throw new RuntimeException("用户[" + user.getUsername() + "]密码错误");		}		return user;	}}

最后是包含了EasyMock简单用法的测试用例

 

 

package com.jadyer.service;import org.easymock.EasyMock;import org.easymock.IMocksControl;import org.junit.Assert;import org.junit.Test;import com.jadyer.dao.BlogDao;import com.jadyer.dao.UserDao;import com.jadyer.model.User;import com.jadyer.service.UserService;import com.jadyer.service.impl.UserServiceImpl;/** * @see -------------------------------------------------------------------------------------------------------------- * @see Mock简介 * @see mock和stub的区别:mock关注的是交互,主要解决的问题是对象之间的交互,而stub关注的是状态 * @see EasyMock就是实现Mock对象的框架,Mock对象是用来对一些未实现关联对象的类进行测试的对象 * @see EasyMock框架在使用时只需要一个easymock-3.1.jar * @see 下载地址为http://sourceforge.net/projects/easymock/files/ * @see -------------------------------------------------------------------------------------------------------------- * @see Mock生命周期 * @see 比如说UserService依赖于UserDao,如果UserDao没有实现,我们可以通过Mock来模拟UserDao的实现 * @see 1)record-->记录UserDao可能会发生的操作的结果,并记录下所有交互过程 * @see 2)replay-->创建UserServiceImpl和UserDao的关联并完成测试 * @see 3)verify-->验证交互关系是否正确 * @see -------------------------------------------------------------------------------------------------------------- * @see Mock创建方式 * @see 1)createMock-------->此时创建的mock对象在进行verify时仅仅检查关联方法是否正常完成调用,只要完成次数一致就认为测试通过 * @see 2)createNiceMock---->很少使用,略掉 * @see 3)createStrictMock-->与createMock不同的是,它还要验证关联方法的调用顺序,即verify时要同时验证完成调用的次数和调用顺序 * @see -------------------------------------------------------------------------------------------------------------- * @see 小结 * @see 还是以UserService依赖于UserDao为例 * @see 如果UserService开发完毕,但UserDao尚未开发或未开发完毕,这时又想测试UserService,那么就可以通过Mock方式来测试 * @see 方法为用EasyMock虚拟一个UserDao对象,然后在虚拟的UserDao上针对UserService方法所需的各方法进行声明其可能出现的调用结果 * @see 也就是声明UserDao各方法所需的传入参数和返回结果,最后再调用UserService中的方法(即内部调用了UserDao的方法)并验证返回结果 * @see 如果对UserService方法的Mock测试全部通过,则表明UserService是编写正确的 * @see 若实际应用中发现UserService发生错误,则说明UserDao出错,而非UserService出错 * @see 说白了,当我们发现所依赖的对象没有实现,而此时又想做测试的话,就可以考虑用Mock来做测试 * @see -------------------------------------------------------------------------------------------------------------- * @create Jul 3, 2013 9:06:14 PM * @author 玄玉
    
      */public class UserServiceTest {	/**	 * 测试普通Mock的使用	 */	@Test	public void testMock(){		//创建DAO的Mock对象		UserDao dao = EasyMock.createMock(UserDao.class);		//进入record阶段:下面这行代码意思是-->当调用dao.load()方法且传入参数为Jadyer时,其返回值为user对象		User user = new User(2, "Jadyer", "hongyu");		//如果UserService.get()里面调用了两次dao.load(),那么这里就要指定其次数		//EasyMock.expect(dao.load("Jadyer")).andReturn(user).times(2);		EasyMock.expect(dao.load("Jadyer")).andReturn(user);		//进入replay阶段		EasyMock.replay(dao);		UserService service = new UserServiceImpl(dao);		User user22 = service.get("Jadyer");		Assert.assertNotNull(user22);		Assert.assertEquals(user22.getId(), user.getId());		Assert.assertEquals(user22.getUsername(), user.getUsername());		Assert.assertEquals(user22.getPassword(), user.getPassword());		//进入verify阶段		EasyMock.verify(dao);	}		/**	 * 测试StrictMock的使用	 */	@Test	public void testStrictMock(){		UserDao dao = EasyMock.createStrictMock(UserDao.class);		User user = new User(2, "Jadyer", "hongyu");		//关键在这里:必须把交互的所有过程都记录下来,也就是说dao方法被调用了几次,分别是调用的哪个方法,包括传的参数及返回值		//若UserServiceImpl.getTwice()中调用两次load()传入参数都是Jadyer,那么下面这两次的expect()操作便可写成一行		//EasyMock.expect(dao.load("Jadyer")).andReturn(user).times(2);		EasyMock.expect(dao.load("http://blog.csdn.net/jadyer")).andReturn(user);		//expectLastCall()是用来操作没有返回值的方法,此时要先执行dao中没有返回值的方法,然后再调用expectLastCall()方法		dao.delete("Jadyer");		EasyMock.expectLastCall();		EasyMock.expect(dao.load("Jadyer")).andReturn(user);		EasyMock.replay(dao);		UserService service = new UserServiceImpl(dao);		User user22 = service.list("Jadyer");		Assert.assertNotNull(user22);		Assert.assertEquals(user22.getId(), user.getId());		Assert.assertEquals(user22.getUsername(), user.getUsername());		Assert.assertEquals(user22.getPassword(), user.getPassword());		EasyMock.verify(dao);	}		/**	 * 使用MocksControl可以检查一组调用对象之间的关系	 * 它比较适用于这种情景-->UserService中的某个方法依赖于UserDao和BlogDao等多个对象的情况	 */	@Test	public void testMocksControl(){		//也可以通过Control创建一组Mock对象,如EasyMock.createControl()		IMocksControl control = EasyMock.createStrictControl();		//这时创建的Mock对象就类似于EasyMock.createStrictMock(UserDao.class);		UserDao userDao = control.createMock(UserDao.class);		BlogDao blogDao = control.createMock(BlogDao.class);		blogDao.update("Jadyer");		EasyMock.expectLastCall();		userDao.delete("Jadyer");		EasyMock.expectLastCall();		//让MocksControl进行操作		control.replay();		new UserServiceImpl(userDao, blogDao).update("Jadyer");		//验证MocksControl中的所有mock调用		control.verify();	}		/**	 * 测试添加一个不存在的用户	 */	@Test	public void testInsertNotExistUser(){		//先做好准备工作		UserDao dao = EasyMock.createStrictMock(UserDao.class);		User user = new User(2, "Jadyer", "hongyu");		UserService service = new UserServiceImpl(dao);		//然后开始EasyMock的测试(先要保证用户不存在,所以要先andReturn(null))		EasyMock.expect(dao.load(user.getUsername())).andReturn(null);		EasyMock.expect(dao.save(user)).andReturn(user);		EasyMock.replay(dao);		User user22 = service.insert(user);		Assert.assertNotNull(user22);		Assert.assertEquals(user22.getId(), user.getId());		Assert.assertEquals(user22.getUsername(), user.getUsername());		Assert.assertEquals(user22.getPassword(), user.getPassword());		EasyMock.verify(dao);	}		/**	 * 测试添加一个存在的用户	 * @see 为了查看效果,可以将expected=RuntimeException.class删去	 */	@Test(expected=RuntimeException.class)	public void testInsertExistUser(){		//先做好准备工作		UserDao dao = EasyMock.createStrictMock(UserDao.class);		User user = new User(2, "Jadyer", "hongyu");		UserService service = new UserServiceImpl(dao);		//然后开始EasyMock的测试(先要保证用户存在,所以要先andReturn(user))		EasyMock.expect(dao.load(user.getUsername())).andReturn(user);		EasyMock.expect(dao.save(user)).andReturn(user);		EasyMock.replay(dao);		User user22 = service.insert(user);		Assert.assertNotNull(user22);		Assert.assertEquals(user22.getId(), user.getId());		Assert.assertEquals(user22.getUsername(), user.getUsername());		Assert.assertEquals(user22.getPassword(), user.getPassword());		EasyMock.verify(dao);	}		/**	 * 测试用户登录成功	 */	@Test	public void testLoginSuccess(){		//同样先做好准备工作		UserDao dao = EasyMock.createStrictMock(UserDao.class);		User user = new User(2, "Jadyer", "hongyu");		UserService service = new UserServiceImpl(dao);		//开始测试		//指定测试时所要登录的用户名和密码,由于这里是要测试登录成功的情况,所以这里用户名密码就要与准备数据中的相同		String username = "Jadyer";		String password = "hongyu";		//先要保证用户存在,所以要先andReturn(user)		EasyMock.expect(dao.load(username)).andReturn(user);		EasyMock.replay(dao);		User user22 = service.login(username, password);		Assert.assertNotNull(user22);		Assert.assertEquals(user22.getId(), user.getId());		Assert.assertEquals(user22.getUsername(), user.getUsername());		Assert.assertEquals(user22.getPassword(), user.getPassword());		EasyMock.verify(dao);	}		/**	 * 测试用户登录失败(用户不存在)	 * @see 为了查看效果,可以将expected=RuntimeException.class删去	 */	@Test(expected=RuntimeException.class)	public void testLoginFailNotExistUser(){		//同样先做好准备工作		UserDao dao = EasyMock.createStrictMock(UserDao.class);		UserService service = new UserServiceImpl(dao);		//开始测试		//指定测试时所要登录的是一个不存在的用户		String username = "Jaders";		String password = "hongyu";		//为了保证用户存在,这里就要andReturn(null),因为dao.load一个不存在用户时取到的是null		EasyMock.expect(dao.load(username)).andReturn(null);		EasyMock.replay(dao);		service.login(username, password);		EasyMock.verify(dao);	}		/**	 * 测试用户登录失败(用户密码错误)	 * @see 为了查看效果,可以将expected=RuntimeException.class删去	 */	@Test(expected=RuntimeException.class)	public void testLoginFailPasswordError(){		//同样先做好准备工作		UserDao dao = EasyMock.createStrictMock(UserDao.class);		User user = new User(2, "Jadyer", "hongyu");		UserService service = new UserServiceImpl(dao);		//开始测试		//指定测试时所要登录的是一个密码错误的用户		String username = "Jadyer";		String password = "xuanyu";		//密码错误时用户是存在的,所以要andReturn(user)		EasyMock.expect(dao.load(username)).andReturn(user);		EasyMock.replay(dao);		service.login(username, password);		EasyMock.verify(dao);	}}