作业三覆盖测试

 Primes.java

 1 package findPrimes;
 2 
 3 public class Primes {
 4     
 5     private final static int MAXPRIMES = 100;
 6     
 7     private boolean isDvisible(int a, int b) {
 8         if ((b % a) == 0) {
 9             return true;
10         }
11         return false;
12     }
13     
14     public String printPrimes(int n) {
15         String prime = "";
16         int curPrime; //Value currently considered for primeness
17         int numPrimes; // Number of primes found so far;
18         boolean isPrime; //Is curPrime prime?
19         int[] primes = new int[MAXPRIMES];// The list of primes.
20         
21         // Initialize 2 into the list of primes.
22         primes[0] = 2;
23         numPrimes = 1;
24         curPrime = 2;
25         while(numPrimes < n) {
26             curPrime++; // next number to consider...
27             isPrime = true;
28             for(int i = 0; i <= numPrimes; i++ ) {
29                 //for each previous prime.
30                 if(isDvisible(primes[i],curPrime)) {
31                     //Found a divisor, curPrime is not prime.
32                     isPrime = false;
33                     break;
34                 }
35             }
36             if(isPrime) {
37                 // save it!
38                 primes[numPrimes] = curPrime;
39                 numPrimes++;
40             
41             }
42         }// End while
43         
44         // print all the primes out
45         for(int i = 0; i < numPrimes; i++) {
46             //System.out.println("Prime: " + primes[i] );
47             Integer inte = new Integer(primes[i]);
48             prime += inte.toString();
49         }
50         return prime;
51         
52     }// End printPrimes.
53 
54 }

 Test case
 PrimePathConverage

 1 package findPrimes;
 2 
 3 import static org.junit.Assert. *;
 4 
 5 import org.junit.Before;
 6 import org.junit.Test;
 7 
 8 public class PrimePathConverage {
 9     
10     private Primes primes;
11     @Before
12     public void setUp() {
13         primes = new Primes();
14     }
15     
16     @Test
17     public void test1() {
18         // [1,2,9,10,12]
19         assertEquals("", primes.printPrimes(1));
20     }
21     
22     @Test
23     public void test2() {
24         assertEquals("23", primes.printPrimes(3));
25     }
26 
27     
28 }

 

 

 

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