以下以银行余额、存款、取款为例
一、Junit配置
Junit同Eclipse一同提供，无需下载。要使用Junit必须先将Junit jar 保存在项目的build路径上，并创建一个测试类，步骤如下：
1）法一：
法二：点击项目test001，右键-propreties
2）选择Libraries，点击Add variable按钮，输入变量名JUNIT_LIB，路径：E:\测试\测试工具\Juint\eclipse\eclipse-jee-kepler-SR2-win32\eclipse\plugins\org.junit_4.11.0.v201303080030，结果如下图：
二、编写测试类和代码、执行测试用例
1）新建测试类：New-Junit Test Case
2）编写测试代码：
1 package testsample; 2 3 import org.junit.After; 4 import org.junit.Before; 5 import junit.framework.TestCase; 6 public class Tc_Account extends TestCase { 7 8 public Tc_Account(String arg0) 9 { 10 super(arg0); 11 } 12 @Before 13 public void setUp() throws Exception { 14 super.setUp() ; 15 } 16 public void testDeposit(){ 17 Account account=new Account(); 18 assertEquals("Account should start with no funds.",1,account.balance()); 19 20 account.deposit(5); 21 assertEquals("Account should reflect deposit.", 7, account.balance()); 22 } 23 24 public void testwithdraw(){ 25 Account account=new Account(); 26 account.deposit(5); 27 account.withdraw(3); 28 assertEquals("Account should reflect withdarw.", 3, account.balance()); 29 } 30 31 @After 32 public void tearDown() throws Exception { 33 super.tearDown(); 34 } 35 } |
3）新建Acoount类，实现银行的余额、存款、取款：
1 package testsample; 2 3 public class Account { 4 protected int balance; 5 public int balance(){ 6 return balance; 7 } 8 public void deposit(int amount){ 9 balance+=amount; 10 } 11 public void withdraw(int amount){ 12 balance-=amount; 13 } 14 } |
4）执行测试用例：右键项目testsample-Run as-Junit Test Case，通过failure trace可以查看错误信息
5）调整测试用例中的预期值：
1 package testsample; 2 3 import org.junit.After; 4 import org.junit.Before; 5 import junit.framework.TestCase; 6 public class Tc_Account extends TestCase { 7 8 public Tc_Account(String arg0) 9 { 10 super(arg0); 11 } 12 @Before 13 public void setUp() throws Exception { 14 super.setUp() ; 15 } 16 public void testDeposit(){ 17 Account account=new Account(); 18 assertEquals("Account should start with no funds.",0,account.balance()); 19 20 account.deposit(5); 21 assertEquals("Account should reflect deposit.", 5, account.balance()); 22 } 23 24 public void testwithdraw(){ 25 Account account=new Account(); 26 account.deposit(5); 27 account.withdraw(3); 28 assertEquals("Account should reflect withdarw.", 2, account.balance()); 29 } 30 31 @After 32 public void tearDown() throws Exception { 33 super.tearDown(); 34 } 35 } |
6）执行测试用例，结果如下：所有测试通过
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