练习5.1更新——四则运算 测试与封装

package com.h1;

import static org.junit.Assert.*;

import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;

import com.h2.Core;

public class CoreTest {    
    @Test
    public void testAdd() {// 加法
        int n = 3;// 操作数个数
        int[] num1 = { 1, 2, 3 };// 操作数
        char[] op = {‘ ‘, ‘+‘, ‘-‘, ‘*‘, ‘/‘ };// 操作符
        int[] no = { 1, 1 };// 操作符下标
        Core c = new Core();
        c.calcute(num1,op,no,n);// 运算1+2+3
        int r = (int) c.getResult();
        System.out.println(r);
        assertEquals(6, r);
    }
    
    @Test
    public void testJian() {// 减法
        int n = 3;// 操作数个数
        int[] num1 = { 1, 2, 3 };// 操作数
        char[] op = { ‘ ‘, ‘+‘, ‘-‘, ‘*‘, ‘/‘ };// 操作符
        int[] no = { 2, 2 };// 操作符下标
        Core c = new Core();
        c.calcute(num1, op, no, n);// 运算1-2-3
        int r = (int) c.getResult();
        System.out.println(r);
        assertEquals(-4, r);
    }
    
    @Test
    public void testMulti() {// 乘法
        int n = 3;// 操作数个数
        int[] num1 = { 2, 2, 3 };// 操作数
        char[] op = { ‘ ‘, ‘+‘, ‘-‘, ‘*‘, ‘/‘ };// 操作符
        int[] no = { 3, 3 };// 操作符下标
        Core c = new Core();
        c.calcute(num1, op, no, n);// 运算2*2*3
        int r = (int) c.getResult();
        System.out.println(r);
        assertEquals(12, r);
    }
    
    @Test
    public void testDiv() {// 除法
        int n = 2;// 操作数个数
        int[] num1 = { 2, 2, 3 };// 操作数
        char[] op = { ‘ ‘, ‘+‘, ‘-‘, ‘*‘, ‘/‘ };// 操作符
        int[] no = { 4 };// 操作符下标
        Core c = new Core();
        c.calcute(num1, op, no, n);// 运算2/2
        double r =  c.getResult();
        System.out.println(r);
        assertEquals(1, r,100);
    }
    
    @Test(expected = ArithmeticException.class)
    public void testZero() {// 除以零
        int n = 3;// 操作数个数
        int[] num1 = { 1, 0, 3 };// 操作数
        char[] op = { ‘ ‘, ‘+‘, ‘-‘, ‘*‘, ‘/‘ };// 操作符
        int[] no = { 4, 1 };// 操作符下标
        Core c = new Core();
        c.calcute(num1, op, no, n);// 运算1/0+3
    }
    
    @Test
    public void testNormal() {// 混合运算
        int n = 5;// 操作数个数
        int[] num1 = { 1, 2, 3, 4 ,4 };// 操作数
        char[] op = { ‘ ‘, ‘+‘, ‘-‘, ‘*‘, ‘/‘ };// 操作符
        int[] no = { 1, 3,2,4 };// 操作符下标
        Core c = new Core();
        c.calcute(num1, op, no, n);// 运算1+2*3
        int r = (int) c.getResult();
        System.out.println(r);
        assertEquals(6, r);
    }
    
    

}