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;
    }
}