try except函数测试程序函数

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

# -*- coding: utf-8 -*-
"""
Created on Wed May 15 15:25:46 2019

@author: Benny
"""

#两个选手A,B的羽毛球竞技比赛预测
from random import random
def printIntro():
    print("这个程序模拟两个选手A和B的羽毛球竞技比赛")
    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）")
def getInputs():
    a = eval(input("请输入选手A的能力值(0-1): "))
    b = eval(input("请输入选手B的能力值(0-1): "))
    n = eval(input("模拟比赛的场次: "))
    m = eval(input("模拟次数："))
    return a, b, n, m
def simNGames(n, probA, probB):
    winsA, winsB = 0, 0
    scoreA_ls=[]
    scoreB_ls=[]
    for i in range(n):
        scoreA, scoreB = simOneGame(probA, probB)
        scoreA_ls.append(scoreA)
        scoreB_ls.append(scoreB)
        if scoreA > scoreB:
            winsA += 1
        else:
            winsB += 1
    return winsA, winsB,scoreA_ls,scoreB_ls
def gameOver(a,b):
    if(a>=20 or b>=20):
        if(abs(a-b)==2 and a<=29 and b<=29):
            return True
        else:
            return a==30 or b==30
    else:
        return False
def simOneGame(probA, probB):
    scoreA, scoreB = 0, 0
    serving = "A"
    while not gameOver(scoreA, scoreB):
        if serving == "A":
            if random() < probA:
                scoreA += 1
            else:
                serving="B"
        else:
            if random() < probB:
                scoreB += 1
            else:
                serving="A"
    return scoreA, scoreB
def printSummary(winsA, winsB,scoreA_ls,scoreB_ls):
    n = winsA + winsB
    print("竞技分析开始，共模拟{}场比赛".format(n))
    print("A选手各场次得分比分:")
    print(scoreA_ls)
    print("B选手各场次得分比分:")
    print(scoreB_ls)
    print("选手A获胜{}场比赛，占比{:0.1%}".format(winsA, winsA/n))
    print("选手B获胜{}场比赛，占比{:0.1%}".format(winsB, winsB/n))
def main():
    printIntro()
    probA, probB, n, m= getInputs()
    for i in range(m):
        winsA, winsB,scoreA_ls,scoreB_ls = simNGames(n, probA, probB)
        printSummary(winsA, winsB,scoreA_ls,scoreB_ls)
    n=input("按任何键退出")
    
main()

1、首先对函数gameOver(a,b)进行测试

def gameOver(a,b):
    if(a>=20 or b>=20):
        if(abs(a-b)==2 and a<=29 and b<=29):
            return True
        else:
            return a==30 or b==30
    else:
        return False
if gameOver(1,21):
    print('Ture')
else:
    print('False')

输入几种特殊情况

def gameOver(a,b):
    if(a>=20 or b>=20):
        if(abs(a-b)==2 and a<=29 and b<=29):
            return True
        else:
            return a==30 or b==30
    else:
        return False
ai=[]
bi=[]
try:
    for a,b in ((1,20),(1,21),(20,20),(21,22),(23,30)):
        if gameOver(a,b):
            ai.append(a)
            bi.append(b)
except:
    print('Error')

print(ai)
print(bi)

函数能正常输出如下：

[23]
[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

if(a>20 or b>20):
        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）

from random import random
try:
    probA,probB=0.5,0.5
    scoreA,scoreB=0,0
    serving = "A"
    if serving == "A":
        if random() < probA:
            scoreA += 1
        else:
            serving="B"
    else:
        if random() < probB:
            scoreB += 1
        else:
            serving="A"
    print(scoreA) 
    print(scoreB)
except:
    print('Error')
   

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）

try:
    n,scoreA,scoreB=1,1,21
    winsA, winsB = 0, 0
    scoreA_ls=[]
    scoreB_ls=[]
    for i in range(n):
        scoreA_ls.append(scoreA)
        scoreB_ls.append(scoreB)
        if scoreA > scoreB:
            winsA += 1
        else:
            winsB += 1
    print(winsA, winsB,scoreA_ls,scoreB_ls)
except:
    print('Error')

程序运行正常，结果为0 1 [1] [21]