软件测试4

Use the following method printPrimes() for questions a–d 题目代码如下: *************

Use the following method printPrimes() for questions a–d.

题目代码如下:

/******************************************************* 
     * 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

a.控制流图

b.令MAXPRIMES=4,这样t2会测试出越界错误,t1不会。

c.输入n=1

d.

1.节点覆盖 {1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16}

2.边覆盖{(1,2),(2,3),(3,4),(4,5),(5,6),(6,7),(5,9),(6,8),(8,5),(7,9),(9,10),(10,11),(9,11),(11,2),(2,12),(12,13),(13,14),(14,15),(15,12),(13,16)}

3.基本路径覆盖{(1,2,3,4,5,6,7,9,10,11),(1,2,3,4,5,6,7,9,11),(1,2,3,4,5,6,8),(1,2,3,4,5,9,10,11),(1,2,3,4,5,9,11),(1,2,12,13,14,15),(1,2,12,13,16),(2,3,4,5,6,7,9,10,11,2),(2,3,4,5,6,7,9,11,2),(2,3,4,5,9,10,11,2),(2,3,4,5,9,11,2),(3,4,5,6,7,9,10,11,2,3),(3,4,5,6,7,9,11,2,3),(3,4,5,9,10,11,2,3),(3,4,5,9,11,2,3),(3,4,5,6,7,9,10,11,2,12,13,14,15),(3,4,5,6,7,9,10,11,2,12,13,16),(3,4,5,6,7,9,11,12,2,12,13,14,15),(3,4,5,6,7,9,11,12,2,13,16),(3,4,5,9,10,11,2,12,13,14,15),(3,4,5,9,10,11,2,12,13,16),(3,4,5,9,11,2,12,13,14,15),(3,4,5,9,11,2,12,13,16),(4,5,6,7,9,10,11,2,3,4),(4,5,6,7,9,11,2,3,4),(4,5,9,10,11,2,3,4),(4,5,9,11,2,3,4),(5,6,7,9,10,11,2,3,4,5),(5,6,7,9,11,2,3,4,5),(5,9,10,11,2,3,4),(5,9,11,2,3,4,5),(5,6,8,5),(6,7,9,10,11,2,3,4,5,6),(6,7,9,11,2,3,4,5,6),(6,8,5,9,10,11,2,3,4,5,6),(6,8,5,9,11,2,3,4,5,6),(6,8,5,9,10,11,2,12,13,14,15),(6,8,5,9,10,11,2,12,13,16),(6,8,5,9,11,2,12,13,14,15),(6,8,5,9,11,2,12,,13,16),(7,9,10,11,2,3,4,5,6,7),(7,9,11,2,3,4,5,6,7),(7,9,10,11,2,3,4,5,6,8),(7,9,11,2,3,4,5,8),(8,5,6,8),(8,5,6,7,9,10,11,2,3,4),(8,5,6,7,9,11,2,3,4),(8,5,6,7,9,10,11,2,12,13,14,15),(8,5,6,7,9,10,11,2,12,13,16),(8,5,6,7,9,11,2,12,13,14,15),(8,5,6,7,9,11,2,12,13,16),(9,10,11,2,3,4,5,9),(9,11,2,3,4,5,9),(9,10,11,2,3,4,5,6,7,9),(9,11,2,3,4,5,6,7,9),(10,11,2,3,4,5,6,7,9,10),(10,11,2,3,4,5,9,10),(11,2,3,4,5,6,7,9,10,11),(11,2,3,4,5,6,7,9,11),(11,2,3,4,5,9,10,11),(11,2,3,4,5,9,11),(13,14,15,13),(14,15,13,14),(14,15,13,16),(15,13,14,15)}

一个主路径覆盖的例子

import static org.junit.Assert.*;

import org.junit.Before;


public class Test {
    Statistics s;
    int a[];
    @Before
    public void setUp(){
         s=new Statistics();
         a= new int[]{1,2,3};
        }

    @org.junit.Test
    public void test() {
        assertEquals(1.0,s.calVar(a),0.001);
    }

}
Test,java
public class Statistics {
    
    /**
     * 
     * @param numbers
     * @return the length of the array
     */
    public int calLength(int[] numbers) {
        int length = numbers.length;
        
        return length;
    }

    /**
     * 
     * @param numbers
     * @return the mean value of the array
     */
    
    public double calMean(int[] numbers) {
        int length = calLength(numbers);
        
        double sum;
        sum = 0.0;
        for (int i = 0; i < length; i++) {
            sum += numbers[i];
        }
        double mean = sum / (double) length;
        
        return mean;
    }

    /**
     * 
     * @param numbers
     * @return the var value of the array
     */
    public double calVar(int[] numbers) {
        int length = calLength(numbers);
        double mean = calMean(numbers);
        
        double varsum = 0.0;
        for (int i = 0; i < length; i++) {
            varsum = varsum + ((numbers[i] - mean) * (numbers[i] - mean));
        }
        double var = varsum / (length - 1.0);
        
        return var;
    }

}
Statistics.java