软件测试技术-hw3

软件测试技术_hw3

题目代码

/******************************************************* 
     * Finds and prints n prime integers 
     * Jeff Offutt, Spring 2003 
     ******************************************************/ 
    public static void printPrimes (int n) 
    { 
        int curPrime; // Value currently considered for primeness 
        int numPrimes; // Number of primes found so far. 
        boolean isPrime; // Is curPrime prime? 
        int [] primes = new int [MAXPRIMES]; // The list of prime numbers. 
        
        // Initialize 2 into the list of primes. 
        primes [0] = 2; 
        numPrimes = 1; 
        curPrime = 2; 
        while (numPrimes < n) 
        { 
            curPrime++; // next number to consider ... 
            isPrime = true; 
            for (int i = 0; i <= numPrimes-1; i++) 
            { // for each previous prime. 
                if (isDivisable(primes[i],curPrime)) 
                { // Found a divisor, curPrime is not prime. 
                    isPrime = false; 
                    break; // out of loop through primes. 
                } 
            } 
            if (isPrime) 
            { // save it! 
                primes[numPrimes] = curPrime; 
                numPrimes++; 
            } 
        } // End while 
        
        // Print all the primes out. 
        for (int i = 0; i <= numPrimes-1; i++) 
        { 
            System.out.println ("Prime: " + primes[i]); 
        } 
    } // end printPrimes

解答

a

b

数组越界可能会发生错误

c

使初始条件n=1,就不会经过while循环

d

点覆盖:{1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16}
边覆盖:{(1,2),(2,3),(2,12),(3,4),(4,5),(5,6),(6,7),(6,8),(7,5),(8,9), (5,9),(9,10),(9,11),(10,11),(11,2),(12,13),(13,14),(14,15),(15,13), (13,16)}
主路径覆盖:{(1,2,3,4,5,6,7),(1,2,3,4,5,6,8,9,10,11),(1,2,3,4,5,6,8,9,11),(1,2,3,4,5,9,10,11),(1,2,3,4,5,9,11),(1,2,12,13,14,15),(1,2,12,16),(3,4,5,6,8,9,10,11,2,12,13,14,15),
(3,4,5,6,8,9,11,2,12,13,14,15),(3,4,5,6,8,9,10,11,2,12,13,16),(3,4,5,6,8,9,11,2,12,13,16),(3,4,5,9,10,11,2,12,13,14,15),(3,4,5,9,11,2,12,13,14,15),(3,4,5,9,10,11,2,12,13,16),
(3,4,5,9,11,2,12,13,16),(6,7,5,9,10,11,2,12,13,14,15),(6,7,5,9,11,2,12,13,14,15),(6,7,5,9,10,11,2,12,13,16),(6,7,5,9,11,2,12,13,16),(14,15,13,16),(13,14,15,13),(5,6,7,5),
(2,3,4,5,6,8,9,10,11,2),(2,3,4,5,6,8,9,11,2),(2,3,4,5,9,10,11,2),(2,3,4,5,9,11,2)}

设计主路径覆盖的测试用例

以第一次上机实验判断三角形的程序为例
主路径测试需求有四个,测试四组用例即可全部覆盖,覆盖率为100%

posted on 2017-03-14 15:44  海门赵又廷  阅读(129)  评论(0)    收藏  举报

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