1.课后问题

  a)画出该方法的控制流图

  

 

  b)令MAXPRIMES=4,我们会发现t1=(n=3)不会越界,而t2=(n=5)则会越界。

  c)令n=1即可

  d)节点覆盖: TR={1,2,3,4,5,6,7,8,9,10,11,12,13,14}

    边覆盖:TR={(1,2), (2,3), (2,11), (3,4), (4,5), (5,6), (5,9), (6,7), (6,8), (7,5), (8,9), (9,10), (9,2), (10,2), (11,12), (12,13), (12,14), (13,12)}

    主路径覆盖:

     TR={(1,2,3,4,5,6,7), (1,2,11,12,13), (1,2,11,12,14), (1,2,3,4,5,9,10), (1,2,3,4,5,6,8,9,10), (1,2,3,4,5,6,8,9,10,11,12,14),

     (2,3,4,5,9,2), (2,3,4,5,6,8,9,2), (2,3,4,5,9,10,2), (2,3,4,5,6,8,9,10,2)

     (5,6,7,5),

     (12,13,12)}

  测试代码如下:

package printPrime;

import static org.junit.Assert.*;

import java.io.ByteArrayOutputStream;
import java.io.PrintStream;

import org.junit.Before;
import org.junit.Test;

public class primeTest {
	prime p;
	ByteArrayOutputStream str;
	
	@Before
	public void setup() throws Exception{
		p = new prime();
		str = new ByteArrayOutputStream();
		System.setOut(new PrintStream(str));
	}
	
	@Test
	public void test() {
		String output = new String("Prime: 2\r\nPrime: 3\r\nPrime: 5\r\nPrime: 7\r\nPrime: 11\r\n");
		p.printPrimes(5);
		assertEquals(output, str.toString());
	}

}

  

 

 

  

 

 posted on 2017-03-13 21:48  Sigu4ng  阅读(208)  评论(0)    收藏  举报