5.1测试与封装

1.第一阶段目标 - 把计算的功能封装成类。

2.设计测试用例：用白盒与黑盒测试设计技术，为计算核心设计测试用例。
3.在实验环境中（如MyEclipse集成开发环境+Junit测试框架）运行测试用例，分析测试结果，找出程序问题，给出改进前后的代码对照。
结对子：
   201306114454 陈汝婷   http://home.cnblogs.com/u/chenruting/
   201306114448 练丽云   http://i.cnblogs.com/EditPosts.aspx?opt=1
import java.text.DecimalFormat;
import java.util.Scanner;

public class Core {
    
    static final int NUM_MAX_OPERATOR = 1; // 最多4 个运算符
    static final int NUM_SCALE = 2; // 数值范围是 -1000 到 1000
    static final int NUM_PRECISION = 3; // 精度是小数点后两位
    public  static int i=0;
    public long z;
    public  double calc(String s) {
        double result = 0.0d;
        // 这个方法中我可以计算两个数的+ - * /
        return result;
    }
    public long add(long x,long y) {
        
        return x+y;
    }
    

import static org.junit.Assert.*;

import org.junit.Test;


public class CoreTest {

    @SuppressWarnings("deprecation")
    @Test

    public void test() {
        Core core = new Core();
        long d = core.calc("+",12589456L,25364563L);
        assertEquals(37954019, d);
    }
    @Test
    public void jianfatest() {
        Core core = new Core();
        long d = core.calc("-",2,1);
        assertEquals(1, d);
    }
    @Test
    public void chengfatest() {
        Core core = new Core();
        long d = core.calc("*",2,1);
        assertEquals(2, d);
    }
    @Test
    public void cftest() {
        Core core = new Core();
        long d = core.calc("/",6,3);
        assertEquals(2, d);
    }
}

    public long calc(String s, long x, long y) {
        Scanner scanner = new Scanner(System.in);
        if (s.equals("+")) {
             z=(x+y);
            System.out.println(z);
        } else if (s.equals("-")) {
             z=x-y;
            System.out.println(z);
        } else if (s.equals("*")) {
             z=x*y;
            System.out.println(z);
        } else if (s.equals("/")) {
            if (y != 0) {
                 z=x/y;
                System.out.println(x / y);
            } else {
                i++;
                if(i<3)
                { 
                    System.out.println("分母不能为零！");
                    System.out.print("请重新输入第二个数：");
                
                    y = scanner.nextLong();
                      calc(s,x,y);
                      
                }
                else{
                    System.out.println(i);
                    System.out.println(exit(i=3));
                }
                }
                      
            }
                
                 
                  
            
        else {
            System.out.println("输入不符合要求！");
        }return z;
    }

public String geta(){
    return String.valueOf(z);
}
    private char[] exit(int j) {
        // TODO 自动生成的方法存根
        return null;
    }
    
}
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JFrame;

import java.awt.GridLayout;
import java.awt.GridBagLayout;

import javax.swing.JToolBar;
import javax.swing.JLabel;

import java.awt.Color;

import javax.swing.JButton;

import java.awt.Font;


public class Test extends JFrame implements ActionListener{
    public JButton bt1;
    JLabel lb1;
    
    public Test() {
        getContentPane().setBackground(Color.PINK);
        setTitle("\u56DB\u5219\u8FD0\u7B97");
        getContentPane().setLayout(null);
        setSize(200,200);
        
         lb1 = new JLabel("\u6B22\u8FCE\u8FDB\u5165\u56DB\u5219\u8FD0\u7B97\u7CFB\u7EDF");
        lb1.setForeground(Color.BLUE);
        lb1.setBounds(10, 10, 159, 15);
        getContentPane().add(lb1);
        
        bt1 = new JButton("\u5F00\u59CB");
        bt1.setBounds(41, 63, 98, 49);
        getContentPane().add(bt1);
        bt1.addActionListener(this);
//        bt1.addActionListener(new ActionListener() {
//            public void actionPerformed(ActionEvent arg0) {
//                //Test1.main(null);
//                
//            }
//        });
        
        
        setVisible(true);                       //将窗口设置为可视
        setResizable(false);
        setAlwaysOnTop(true);//设置此窗口永远为最上方 是window的方法
        setLocationRelativeTo(null);  //让窗口在屏幕的正中间显示
      
    }

    
    public void actionPerformed(ActionEvent arg0) {
        if(arg0.getSource()==bt1){
            new Test1();
            
        }
    }
  

public static void main(String[] args) {
    Test test=new Test();
 }
}

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JFrame;
import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.JTextField;




public class Test1 extends JFrame implements ActionListener{
    private JTextField T1;
    private JTextField T2;
    private JTextField T3;
    private JTextField T4;
    private JLabel l0 ;
    private JLabel l1;
    private JLabel l2;
    private  JLabel label_3;
    private JButton button;
    
    
    public    long x;
    public   long y ;

    public    String x1;
    public   String y1 ;
    public String s;
    
    
    public Test1() {
        setTitle("SI \u5219\u8FD0\u7B97");
        getContentPane().setLayout(null);
        setSize(400,400);
        JButton btnNewButton = new JButton("\u7EE7\u7EED");
        btnNewButton.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent arg0) {
            }
        });
        btnNewButton.setBounds(130, 239, 93, 23);
        getContentPane().add(btnNewButton);
        
         l0 = new JLabel("\u8BF7\u8F93\u5165\u7B2C\u4E00\u4E2A\u6570\uFF1A");
        l0.setBounds(38, 64, 131, 15);
        getContentPane().add(l0);
        
         l1 = new JLabel("\u8BF7\u8F93\u5165\u7B2C\u4E8C\u4E2A\u6570\uFF1A");
        l1.setBounds(38, 89, 131, 15);
        getContentPane().add(l1);
        
         l2 = new JLabel("\u8BF7\u8F93\u5165\u8FD0\u7B97\u7B26\uFF1A");
        l2.setBounds(38, 114, 131, 15);
        getContentPane().add(l2);
        
        T1 = new JTextField();
        T1.setBounds(206, 61, 66, 21);
        getContentPane().add(T1);
        T1.setColumns(10);
        T1.addActionListener(this);
        T2 = new JTextField();
        T2.setColumns(10);
        T2.setBounds(206, 86, 66, 21);
        getContentPane().add(T2);
        T2.addActionListener(this);
        T3 = new JTextField();
        T3.setColumns(10);
        T3.setBounds(206, 111, 66, 21);
        getContentPane().add(T3);
        T3.addActionListener(this);
        
         button = new JButton("\u7ED3\u675F");
        button.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent arg0) {
            }
        });
        button.setBounds(264, 239, 93, 23);
        getContentPane().add(button);
        
         label_3 = new JLabel("\u8FD0\u7B97\u7ED3\u679C\uFF1A");
        label_3.setBounds(38, 139, 131, 15);
        getContentPane().add(label_3);
        
        T4 = new JTextField();
        T4.setColumns(10);
        T4.setBounds(206, 142, 66, 21);
        getContentPane().add(T4);
        T4.addActionListener(this);
this.setVisible(true);
    }

    public static void main(String[] args) {
        new Test1();
        Test.setDefaultLookAndFeelDecorated(false);
             
    }


    public void actionPerformed(ActionEvent evt) {

        
        if(evt.getSource()==T1){  
            T2.requestFocusInWindow();  
        }  
        else if(evt.getSource()==T2){
            T3.requestFocusInWindow(); 
        }
        else if(evt.getSource()==T3){
            T3.requestFocusInWindow();}
        else{
            x1=T1.getText();
            y1=T2.getText();
            s=T3.getText();
            x=Integer.valueOf(x1);
            y=Integer.valueOf(y1);
            
            
         Core core=new Core();
            T4.setText(core.geta());
        }
        
    }
    }
运行结果：
减法测试：
 
乘法：
除法：
当除数为0的时候会有2次重新输入输入的机会

开始界面