junit学习（3.x）

自动化测试

测试所有测试类

 import junit.framework.TestCase;
 import junit.framework.Assert;

 /**
  *测试类必须要继承TestCase类
  *在junit3.8中，测试方法需要满足以下原则：
  *1、public
  *2。void
  *3.无方法参数
  *4.方法名称必须以test开头
  *执行每个测试用例前会调用setup方法，后会调用tearDown方法
  */
 public class CalculatorTest extends TestCase {
     private Calculator cal;
     public CalculatorTest(String name){
         super(name);
     }
     @Override
     public void setUp() throws Exception {
         cal=new Calculator();
     }
     public void testAdd(){
         int result=cal.add(2, 3);
         Assert.assertEquals(5, result);
     }
     public void testSubtract(){
         int result=cal.subtract(2, 3);
         Assert.assertEquals(-1, result);
     }
     public void testMutiply(){
         int result=cal.multiply(2, 3);
         Assert.assertEquals(6, result);
     }
     public void testDivide(){
         int result=0;
         try {
             result = cal.divide(6, 2);

         } catch (Exception e) {
             // TODO Auto-generated catch block
             e.printStackTrace();
             Assert.fail();
         }
         Assert.assertEquals(3, result);
     }
     /**
      * Throwable为错误和异常的父类
      */
     public void testDivideByZero(){
         Throwable tx=null;
         try {
             cal.divide(2, 0);
             Assert.fail();
         } catch (Exception e) {
             tx=e;
             e.printStackTrace();
         }
         Assert.assertEquals(Exception.class,tx.getClass());
         Assert.assertEquals("除数不能为0", tx.getMessage());
     }
 }

添加进自动化测试

 import junit.extensions.RepeatedTest;
 import junit.framework.TestCase;
 import junit.framework.TestSuite;
 import junit.framework.Test;

 /**
  * 自动化测试
  *
  */
 public class TestAll extends TestCase {
     public static Test suite(){
         TestSuite suite=new TestSuite();
         suite.addTestSuite(CalculatorTest.class);
         suite.addTestSuite(LargestTest.class);
         suite.addTestSuite(DeleteAllTest.class);
         //重复执行CalculatorTest里的testAdd方法的次数
         suite.addTest(new RepeatedTest(new CalculatorTest("testAdd"), 20));
         return suite;
     }
 }