20155210潘滢昊 Java第二次试验

20155210潘滢昊 Java第二次试验

实验内容

学会JunitTest的使用

实验代码

MyUtilTest代码：

import org.junit.*;
import junit.framework.TestCase;
public class MyUtilTest extends TestCase {
    @Test
    public void testNormal(){
        assertEquals("不及格",MyUtil.percentage2fivegrade(51));
        assertEquals("及格",MyUtil.percentage2fivegrade(62));
        assertEquals("中等",MyUtil.percentage2fivegrade(73));
        assertEquals("良好",MyUtil.percentage2fivegrade(84));
        assertEquals("优秀",MyUtil.percentage2fivegrade(95));
    }
    @Test
    public void testExceptions(){
        assertEquals("错误",MyUtil.percentage2fivegrade(-1));
        assertEquals("错误",MyUtil.percentage2fivegrade(150));
    }
    @Test
    public void testBoundary(){
        assertEquals("不及格",MyUtil.percentage2fivegrade(50));
        assertEquals("及格",MyUtil.percentage2fivegrade(60));
        assertEquals("中等",MyUtil.percentage2fivegrade(70));
        assertEquals("良好",MyUtil.percentage2fivegrade(80));
        assertEquals("优秀",MyUtil.percentage2fivegrade(90));
        assertEquals("优秀",MyUtil.percentage2fivegrade(100));
    }
}

StringBufferTest代码：

import junit.framework.TestCase;
import org.junit.*;
import static org.junit.Assert.*;
public class StringBufferDemoTest extends TestCase {
    StringBuffer  a=new StringBuffer("StringBuffer");
    StringBuffer  b=new StringBuffer("StringBufferStringBuffer");
    StringBuffer  c=new StringBuffer("StringBufferStringBufferStringBuffer");
    @Test
    public void testcharAt() throws Exception{
        assertEquals('t',a.charAt(1));
        assertEquals('g',a.charAt(5));
        assertEquals('r',a.charAt(11));
    }
    @Test
    public void testcapacity() throws Exception{
        assertEquals(28,a.capacity());
        assertEquals(40,b.capacity());
        assertEquals(52,c.capacity());
    }
    @Test
    public void testlength() throws Exception{
        assertEquals(12,a.length());
        assertEquals(24,b.length());
        assertEquals(36,c.length());
    }
    @Test
    public void testindexOf() throws Exception{
        assertEquals(0,a.indexOf("Str"));
        assertEquals(5,a.indexOf("gBu"));
        assertEquals(10,a.indexOf("er"));
    }
}

ComplexTest代码：

import junit.framework.TestCase;
import org.junit.*;
public class ComplexTest extends TestCase {

    @Test
    public void testNormal() throws Exception{
        Complex c=new Complex();
        Complex c1=new Complex(4,5);
        Complex c2=new Complex(6,7);
        c1.Print();
        c2.Print();
        System.out.println("这两复数和为：");
        System.out.println((c.jia(c1, c2).a+"+"+c.jia(c1, c2).b+"i").toString());
        System.out.println("这两复数差为：");
        System.out.println(c.jian(c1, c2).a+"+"+c.jian(c1, c2).b+"i");
        System.out.println("这两复数乘积为:");
        System.out.println(c.cheng(c1, c2).a+"+"+c.cheng(c1,c2).b+"i");
        System.out.println("这两复数相除为:");
        System.out.println(c.chu(c1, c2).a+"+"+c.chu(c1,c2).b+"i");
    }
}

实验运行截图

以上传到云班课中

实验时间表

	题目思考时间	代码编辑时间	代码调试时间
时间	60min	60min	30min