实例分析等价类划分（二）

基于我上一篇博客http://www.cnblogs.com/xlwm/p/4347304.html 的问题稍加修改，就可以得到一个截然不同的实例：

1.问题描述

3个EditBox，每个允许输入1到6个英文字符或数字，按OK输入结束

(通过输入字符串，返回正误信息）

2.等价类划分

	有效等价类	编号	无效等价类	编号
长度	1-6	1	0,6以上	4
字符	a-z,A-Z,0-9	2	英文/数字以外字符，控制字符，标点符号	5
合理个数	3	3	0，1，2	6

3.测试用例

针对等价类的划分,我们可以选取以下作为测试用例:

编号	输入	覆盖等价类	预期输出
Test1	String 1 = "1" String 2 = "2a3w9P" String 3 = "faj2"	1,2,3	It's OK.
Test2	String 1 = "2w4" String 2 = "rer" String 3 = "fadf"	1,2,3	It's OK.
Test3	String 1 = "a' String 2 = “1” String 3 = “Z”	1,2,3	It's OK.
Test4	String 1 = “123456" String 2 = "AFDERT" String 3 = "atryue"	1,2,3	It's OK.
Test5	String 1 = "1a9T0z" String 2 = "fd" String 3 = "2ker"	1,2,3	It's OK.
Test6	String 1 = "fdas" String 2 = "23" String 3 = "AW"	1,2,3	It's OK.
Test7	String 1 = "" String 2 = "fadf" String 3 = "fdasf"	4,6	Please ensure each string is reasonable.
Test8	String 1 = "ei" String 2 = "112;2312" String 3 = "fa"	4,5,6	Please ensure each string is reasonable.
Test9	String 1 = “12” String 2 = “dafadfsfe" String 3 = "2faf"	4,6	Please ensure each string is reasonable.
Test10	String 1 = "12" String 2 = ""afds;" String 3 = "@df"	5,6	Please ensure each string is reasonable.
Test11	String 1 = "" String 2 = "f^;" String 3 = "13efdafa"	4,5,6	Please ensure each string is reasonable.
Test12	String 1 = "fad" String 2 = "fdas" String 3 = "fdasf;"	5,6	Please ensure each string is reasonable.

4.代码实现及结果样例：

只是在原来代码的基础上对判断条件和布局稍加修改，因而这里不再赘述实现原理，最终代码如下：

 1 __author__ = 'xinlan'
 2 # -*- coding: utf-8 -*
 3 
 4 from Tkinter import *
 5 import tkMessageBox
 6 import re
 7 
 8 def judge(str):
 9     if re.match(r'^\w{1,6}$', str):
10         return True
11     else:
12         return False
13 
14 class Application(Frame):
15     def __init__(self,master=None):
16         Frame.__init__(self, master)
17         self.createWidgets(master)
18 
19     def createWidgets(self,master):
20         Label(master,text='String 1:').grid(row=0)
21         self.nameInput1 = Entry(master)
22         self.nameInput1.grid(row=0,column=1)
23         Label(master,text='String 2:').grid(row=1)
24         self.nameInput2 = Entry(master)
25         self.nameInput2.grid(row=1,column=1)
26         Label(master,text='String 3:').grid(row=2)
27         self.nameInput3 = Entry(master)
28         self.nameInput3.grid(row=2,column=1)
29         self.alertButton = Button(master, text='OK', command=self.ok)
30         self.alertButton.grid(column=1)
31 
32     def ok(self):
33         name1 = self.nameInput1.get()
34         name2 = self.nameInput2.get()
35         name3 = self.nameInput3.get()
36         if(judge(name1) and judge(name2) and judge(name3)):
37             tkMessageBox.showinfo('Message', 'It\'s OK')
38             self.nameInput1.delete(0,last=len(name1))
39             self.nameInput2.delete(0,last=len(name2))
40             self.nameInput3.delete(0,last=len(name3))
41 
42         else:
43              tkMessageBox.showinfo('Message','Please ensure each string is reasonable!')
44              self.nameInput1.delete(0,last=len(name1))
45              self.nameInput2.delete(0,last=len(name2))
46              self.nameInput3.delete(0,last=len(name3))
47 
48 app = Application()
49 # 设置窗口标题:
50 app.master.title('Test')
51 # 主消息循环:
52 app.tk.mainloop()