try except函数测试函数

Posted 2021-12-02 shuxincheng

对一个体育竞技模拟程序的各个函数进行测试

原程序代码如下

 1 # -*- coding: utf-8 -*-
 2 """
 3 Created on Wed May 15 15:25:46 2019
 4 
 5 @author: Benny
 6 """
 7 
 8 #两个选手A,B的羽毛球竞技比赛预测
 9 from random import random
10 def printIntro():
11     print("这个程序模拟两个选手A和B的羽毛球竞技比赛")
12     print("程序运行需要A和B的能力值（以0到1之间的小数表示）")
13 def getInputs():
14     a = eval(input("请输入选手A的能力值(0-1): "))
15     b = eval(input("请输入选手B的能力值(0-1): "))
16     n = eval(input("模拟比赛的场次: "))
17     m = eval(input("模拟次数："))
18     return a, b, n, m
19 def simNGames(n, probA, probB):
20     winsA, winsB = 0, 0
21     scoreA_ls=[]
22     scoreB_ls=[]
23     for i in range(n):
24         scoreA, scoreB = simOneGame(probA, probB)
25         scoreA_ls.append(scoreA)
26         scoreB_ls.append(scoreB)
27         if scoreA > scoreB:
28             winsA += 1
29         else:
30             winsB += 1
31     return winsA, winsB,scoreA_ls,scoreB_ls
32 def gameOver(a,b):
33     if(a>=20 or b>=20):
34         if(abs(a-b)==2 and a<=29 and b<=29):
35             return True
36         else:
37             return a==30 or b==30
38     else:
39         return False
40 def simOneGame(probA, probB):
41     scoreA, scoreB = 0, 0
42     serving = "A"
43     while not gameOver(scoreA, scoreB):
44         if serving == "A":
45             if random() < probA:
46                 scoreA += 1
47             else:
48                 serving="B"
49         else:
50             if random() < probB:
51                 scoreB += 1
52             else:
53                 serving="A"
54     return scoreA, scoreB
55 def printSummary(winsA, winsB,scoreA_ls,scoreB_ls):
56     n = winsA + winsB
57     print("竞技分析开始，共模拟{}场比赛".format(n))
58     print("A选手各场次得分比分:")
59     print(scoreA_ls)
60     print("B选手各场次得分比分:")
61     print(scoreB_ls)
62     print("选手A获胜{}场比赛，占比{:0.1%}".format(winsA, winsA/n))
63     print("选手B获胜{}场比赛，占比{:0.1%}".format(winsB, winsB/n))
64 def main():
65     printIntro()
66     probA, probB, n, m= getInputs()
67     for i in range(m):
68         winsA, winsB,scoreA_ls,scoreB_ls = simNGames(n, probA, probB)
69         printSummary(winsA, winsB,scoreA_ls,scoreB_ls)
70     n=input("按任何键退出")
71     
72 main()

1、首先对函数gameOver(a,b)进行测试

 1 def gameOver(a,b):
 2     if(a>=20 or b>=20):
 3         if(abs(a-b)==2 and a<=29 and b<=29):
 4             return True
 5         else:
 6             return a==30 or b==30
 7     else:
 8         return False
 9 if gameOver(1,21):
10     print(‘Ture‘)
11 else:
12     print(‘False‘)

输入几种特殊情况

 1 def gameOver(a,b):
 2     if(a>=20 or b>=20):
 3         if(abs(a-b)==2 and a<=29 and b<=29):
 4             return True
 5         else:
 6             return a==30 or b==30
 7     else:
 8         return False
 9 ai=[]
10 bi=[]
11 try:
12     for a,b in ((1,20),(1,21),(20,20),(21,22),(23,30)):
13         if gameOver(a,b):
14             ai.append(a)
15             bi.append(b)
16 except:
17     print(‘Error‘)
18 
19 print(ai)
20 print(bi)

函数能正常输出如下：

1 [23]
2 [30]

但是理想输出应该为

[1, 23]
[21, 30]

然后观察程序代码发现第2，3行应改为如下

1 if(a>20 or b>20):
2         if(abs(a-b)>=2 and a<=29 and b<=29):

更改后得到预期结果

2、现在对simOneGame(proA,proB)函数进行测试（改写部分代码方便测试）

 

 1 from random import random
 2 try:
 3     probA,probB=0.5,0.5
 4     scoreA,scoreB=0,0
 5     serving = "A"
 6     if serving == "A":
 7         if random() < probA:
 8             scoreA += 1
 9         else:
10             serving="B"
11     else:
12         if random() < probB:
13             scoreB += 1
14         else:
15             serving="A"
16     print(scoreA) 
17     print(scoreB)
18 except:
19     print(‘Error‘)
20    

 

程序运行成功而且结果无误：结果为1   0

3、最后对simNGames(n, probA, probB)进行测试（改写部分代码方便测试）

 1 try:
 2     n,scoreA,scoreB=1,1,21
 3     winsA, winsB = 0, 0
 4     scoreA_ls=[]
 5     scoreB_ls=[]
 6     for i in range(n):
 7         scoreA_ls.append(scoreA)
 8         scoreB_ls.append(scoreB)
 9         if scoreA > scoreB:
10             winsA += 1
11         else:
12             winsB += 1
13     print(winsA, winsB,scoreA_ls,scoreB_ls)
14 except:
15     print(‘Error‘)

程序运行正常，结果为0 1 [1] [21]