junit学习（3.x）

自动化测试

测试所有测试类

 1 import junit.framework.TestCase;
 2 import junit.framework.Assert;
 3
 4 /**
 5  *测试类必须要继承TestCase类
 6  *在junit3.8中，测试方法需要满足以下原则：
 7  *1、public
 8  *2。void
 9  *3.无方法参数
10  *4.方法名称必须以test开头
11  *执行每个测试用例前会调用setup方法，后会调用tearDown方法
12  */
13 public class CalculatorTest extends TestCase {
14     private Calculator cal;
15     public CalculatorTest(String name){
16         super(name);
17     }
18     @Override
19     public void setUp() throws Exception {
20         cal=new Calculator();
21     }
22     public void testAdd(){
23         int result=cal.add(2, 3);
24         Assert.assertEquals(5, result);
25     }
26     public void testSubtract(){
27         int result=cal.subtract(2, 3);
28         Assert.assertEquals(-1, result);
29     }
30     public void testMutiply(){
31         int result=cal.multiply(2, 3);
32         Assert.assertEquals(6, result);
33     }
34     public void testDivide(){
35         int result=0;
36         try {
37             result = cal.divide(6, 2);
38
39         } catch (Exception e) {
40             // TODO Auto-generated catch block
41             e.printStackTrace();
42             Assert.fail();
43         }
44         Assert.assertEquals(3, result);
45     }
46     /**
47      * Throwable为错误和异常的父类
48      */
49     public void testDivideByZero(){
50         Throwable tx=null;
51         try {
52             cal.divide(2, 0);
53             Assert.fail();
54         } catch (Exception e) {
55             tx=e;
56             e.printStackTrace();
57         }
58         Assert.assertEquals(Exception.class,tx.getClass());
59         Assert.assertEquals("除数不能为0", tx.getMessage());
60     }
61 }

添加进自动化测试

 1 import junit.extensions.RepeatedTest;
 2 import junit.framework.TestCase;
 3 import junit.framework.TestSuite;
 4 import junit.framework.Test;
 5
 6 /**
 7  * 自动化测试
 8  *
 9  */
10 public class TestAll extends TestCase {
11     public static Test suite(){
12         TestSuite suite=new TestSuite();
13         suite.addTestSuite(CalculatorTest.class);
14         suite.addTestSuite(LargestTest.class);
15         suite.addTestSuite(DeleteAllTest.class);
16         //重复执行CalculatorTest里的testAdd方法的次数
17         suite.addTest(new RepeatedTest(new CalculatorTest("testAdd"), 20));
18         return suite;
19     }
20 }