作业5.1

package com.szys.junit;


public class T {
	int a;
	int b;
	public T(int a,int b)
	{
		this.a=a;
		this.b=b;
	}
	public int add()
	{
		return a + b;
	}
	public int minus()
	{
		return a - b;
	}
	public int mul()
	{
		return a * b;
	}
	public int div()throws Exception
	{
		if(0 == b)
        {
            throw new Exception("除数不能为0");            
        }
        return a / b;

	}
}

package com.szys.junit.test;

import static org.junit.Assert.*;

import org.junit.Test;

import com.szys.junit.T;

public class TTest {

	@Test
	public void test() {
		int a=new T(1, 2).add();
		assertEquals(3, a);
		int b=new T(4, 3).minus();
		assertEquals(1,b);
		int c=new T(3, 4).mul();
		assertEquals(12,c);
		try {
		int d=new T(4, 4).div();
		assertEquals(1, d);
		}catch(Exception e){
			e.printStackTrace();
		}
	}

}