单元测试阶段--ATM取款机

软件测试方法和技术
实验报告
实验时间：2012年12月4日
一、实验名称：
单元测试阶段Mock Object的用法(以ATM取款机为例)
二、开发工具：
Eclipse、JUnit、eclemma和EasyMock
三、实验代码：
(1)类ATMService:
package atm;
public class ATMService {
private IDataConnection dconn;
public ATMService(IDataConnection dc){
dconn=dc;
}
//取款操作
public void withdraw(String cardNo,int amount){ AccountInfo a=dconn.getAccount(cardNo);
int balance=a.getBalance()-amount;
a.setBalance(balance);
dconn.updateAccount(a);
}
//存款操作
public void deposit(String cardNo,int amount){ AccountInfo a=dconn.getAccount(cardNo);
int balance=a.getBalance()+amount;
a.setBalance(balance);
dconn.updateAccount(a);
}
//转账操作
public void transfer(String fromCardNo,String toCardNo,int amount){
AccountInfo a=dconn.getAccount(fromCardNo);
AccountInfo b=dconn.getAccount(toCardNo);
int aBalance=a.getBalance()-amount;
int bBalance=b.getBalance()+amount;
a.setBalance(aBalance);
b.setBalance(bBalance);
dconn.updateAccount(a);
dconn.updateAccount(b);
}
//查询操作
public int inquiry(String cardNo){
AccountInfo a=dconn.getAccount(cardNo);
return a.getBalance();
}
}
(2)TestATMService单元测试用例
package atm;
import static org.junit.Assert.*;
import org.junit.Test;
public class TestATMService {
private IDataConnection mdc = new MockDataConnection();
private ATMService atm = new ATMService(mdc);
@Test
public void testWithdraw() {
atm.withdraw("1", 20);
AccountInfo a = mdc.getAccount("1");
assertEquals(280,a.getBalance());
}
@Test
public void testDeposit(){
atm.deposit("1",20);
AccountInfo a = mdc.getAccount("1");
assertEquals(320,a.getBalance());
}
@Test
public void testTransfer(){
atm.transfer("2", "1", 200);
AccountInfo a = mdc.getAccount("1");
AccountInfo b = mdc.getAccount("2");
assertEquals(500,a.getBalance());
assertEquals(800,b.getBalance());
}
@Test
public void testInquiry(){
assertEquals(1000,atm.inquiry("2"));
}
}
测试用例执行情况：
测试用例的覆盖情况：
(3) TestATMServiceWithEMock单元测试用例package atm;
import static org.easymock.EasyMock.*;
import static org.junit.Assert.*;
import org.junit.Before;
import org.junit.Test;
public class TestATMServiceWithEMock {
private ATMService atm;
private IDataConnection mock;
@Before
public void setUp(){
mock = createMock(IDataConnection.class);
atm = new ATMService(mock);
}
@Test
public void testTransfer() {
AccountInfo a = new AccountInfo("1","111111",500);
AccountInfo b = new AccountInfo("2","222222",1000);
//设置期望值
expect(mock.getAccount("1")).andReturn(a);
expect(mock.getAccount("2")).andReturn(b);
mock.updateAccount(a);
mock.updateAccount(b);
replay(mock); //回放
//执行被测方法
atm.transfer("2", "1", 150);
//验证执行被测方法后的状态
assertEquals(650,a.getBalance());
assertEquals(850,b.getBalance());
verify(mock);
}
}
测试用例执行情况：。