1、
2、
一个最直观的错误就是数组越界,n取的值越大,数组越界就越有可能发生
3、当n=1时候满足
第四问要求找出点覆盖、边覆盖和主路径覆盖的所有TR(测试需求)
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),
}
最后,对任意程序设计主路径覆盖的测试用例,以上次的判断三角形的形状的程序为例
package cn.tju.st;
public class Triangle {
public int a;
public int b;
public int c;
public Triangle(int a,int b,int c)
{
this.a=a;
this.b=b;
this.c=c;
}
public String judge() {
if(a==b&&b==c)
return "equilateral";
else if(a==b||b==c||c==a)
return "isosceles";
else {
return "scalene";
}
}
}
package cn.tju.st;
import static org.junit.Assert.*;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
public class TestTriangle {
Triangle tri =null;
@Before
public void setUp() throws Exception {
//System.out.println("This is before test");
}
@After
public void tearDown() throws Exception {
System.out.println("This is after test");
}
@Test
public void test() {
tri = new Triangle(3,3,3);
assertEquals("equilateral",tri.judge());
tri = new Triangle(2,3,3);
assertEquals("isosceles",tri.judge());
tri = new Triangle(3,4,5);
assertEquals("scalene",tri.judge());
}
}
三组测试用例(3,3,3),(2,3,3),(3,4,5)即可完成主路径覆盖