Junit實例(計算加減乘除)

 

一、eclipse建立Java project,並創建相應的包、類(calculate.java)java

二、在package explorer中右鍵new Junit Test Case,關聯相應的工程eclipse

三、選擇Junit4則會自動引入相應的包ide

四、編寫calculate類中的加減乘除函數函數

package com.calculate;

public class Calculate {
    public int add(int a,int b)
    {
        return (a+b);
    };
    public int subtract(int a,int b)
    {
        return (a-b);
    };
    public int multiply(int a,int b)
    {
        return (a*b);
    };
    public int divide(int a,int b)
    {
        if(b==0)
        {
            System.out.print("分母不能爲0");
            return 0;
        }
        else
        {
            
            return (a/b);
        }
        
    };
    
}

五、主函數main測試

package com.calculate;

public class test {
    public static void main(String[] args)
    {
        Calculate test=new Calculate();
        System.out.println("加法運算:"+test.add(12, 13));
        System.out.println("減法運算:"+test.subtract(18, 2));
        System.out.println("乘法運算:"+test.multiply(2, 6));
        System.out.println("除法運算:"+test.divide(4, 4));
    }
}

六、編寫測試用例spa

package com.calculate;

import static org.junit.Assert.*;

import org.junit.After;
import org.junit.Before;
import org.junit.Test;

public class Calculatetest {
    Calculate mycal=new Calculate();
    @Before
    public void setUp(){
        System.out.println("測試開始");
    }
    @After
    public void down()
    {
        System.out.println("測試結束");
    }
    @Test
    public void testAdd() {
        assertEquals(8,mycal.add(2, 6));
    }
    @Test
    public void testsubtract() {
        assertEquals(2,mycal.subtract(4,2));
        assertEquals(7,mycal.subtract(9, 2));
    }
    @Test
    public void testmultiply() {
        assertEquals(15,mycal.multiply(3, 5));
        assertEquals(12,mycal.multiply(3, 4));
    }
    @Test
    public void testdivide() {
        assertEquals(1,mycal.divide(4, 4));
        assertEquals(0,mycal.divide(4, 0));
        assertEquals(2,mycal.divide(4, 2));
    }
}

七、右鍵工程->Run as->Junit Test,若是有錯誤則滾動條會出現紅色,不然爲綠色。code

 

結束!blog

相關文章
相關標籤/搜索