(A)控制流图
(B)
在if(isDivisible(primes[i],curPrime))里去掉isPrime=false，即可使t2比t1更容易发现。
(C)
t＝(n＝1)
(D)
节点覆盖：
{1,2,3,4,5,6,7,8,9,10,11,12}
边覆盖：
{(1,2),(2,10),(2,3),(3,4),(4,5),(5,6),(6,4),(4,8),(5,7)
,(7,8),(8,2),(8,9),(9,2),(10,11),(10,12),(11,10)}
主路径：
{(2,3,4,5,7,8,9,2),(2,3,4,5,7,8,2),(4,5,6,4),(1,2,10,12),(10,11,12)}
二、实现一个主路径覆盖
测试方法
public static String whatIsTriangle(double a,double b, double c){ if(a <= 0 || b <= 0 || c <= 0) return "wrong"; if(a + b > c && a + c > b && b + c > a){ if(a == b && a ==c) return "equilateral"; else if(a==b || a==c || b==c) return "isosceles"; else return "scalene"; } else{ return "wrong"; } }
控制流图
主路径：
{(1,2),(1,3,4),(1,3,5,6),(1,3,5,7),(1,3,5,8)}
测试用例：
@RunWith(Parameterized.class)
public class TestTriangle1 {
private double input1; private double input2; private double input3; private String expected; public TestTriangle1(double input1,double input2,double input3,String expected){ this.input1 = input1; this.input2 = input2; this.input3 = input3; this.expected = expected; } @Parameters public static Collection getData(){ return Arrays.asList(new Object[][]{ {3,3,3,"equilateral"}, {3,4,3,"isosceles"}, {3,4,5,"scalene"}, {0,0,0,"wrong"}, {1,3,4,"wrong"} }); } @Test public void test(){ assertEquals(this.expected,Triangle.whatIsTriangle(input1,input2,input3)); } }
覆盖结果：
