1、Install Junit(4.12), Hamcrest(1.3) with Eclipse

2、Install Eclemma with Eclipse

3、Write a java program for the triangle problem and test the program with Junit.

Description of triangle problem:

Function triangle takes three integers a,b,c which are length of triangle sides; calculates whether the triangle is equilateral, isosceles, or scalene.

Triangle.java：

 1 package cn.st.lab1;
 2 
 3 public class Triangle {
 4     public static boolean isTriangle(int a, int b, int c) {
 5         if(a+b>c && a+c>b && b+c>a && Math.abs(a-b)<c && 
 6                 Math.abs(a-c)<b && Math.abs(b-c)<a && a>0 && b>0 && c>0) {
 7             return true;
 8         }
 9         else {
10             return false;
11         }
12     }
13     public static boolean isEquilateral(int a, int b, int c) {
14         if(isTriangle(a,b,c)) {
15             if(a == b && a == c) {
16                 return true;
17             }
18         }
19         return false;
20     }
21     public static boolean isIsosceles(int a, int b, int c) {
22         if(isTriangle(a,b,c)) {
23             if(a == b || a == c || b == c) {
24                 return true;
25             }
26         }
27         return false;
28     }
29     
30     public static void Triangle (int a, int b, int c) {
31         if(isTriangle(a,b,c)) {    //输出以下内容，则为三角形
32             if(isEquilateral(a,b,c)) {
33                 System.out.println("Equilateral");
34             } //如果是等边，只输出等边，不输出等腰
35             else if(isIsosceles(a,b,c)) {
36                 System.out.println("Isosceles");
37             }
38             else {
39                 System.out.println("Scalene");
40             }
41         }
42         else {
43             System.out.println("NotATriangle");
44         }
45     }
46

testTriangle.java：

 1 package cn.st.lab1;
 2 
 3 import static org.junit.Assert.*;
 4 
 5 import org.junit.*;
 6 
 7 public class testTriangle {
 8     
 9     Triangle t;
10     @Before
11     public void setUp(){
12         t = new Triangle();
13     }
14     
15     @Test
16     public void testIsEquilateral() {
17         assertEquals("testIsEquilateral", true, t.isEquilateral(6,6,6));
18     }
19     @Test
20     public void testIsIsosceles() {
21         assertEquals("testIsIsosceles", true, t.isIsosceles(5,6,6));
22     }
23     @Test
24     public void testIsTriangle() {
25         assertEquals("testIsTriangle", true, t.isTriangle(5,6,7));
26     }
27     @Test
28     public void testTriangle() {
29         t.Triangle(3, 4, 5);
30         t.Triangle(3, 4, 4);
31         t.Triangle(4, 4, 4);
32         t.Triangle(1, 1, 5);
33     }
34 }

实验结果：

代码请见github:https://github.com/fogmisty/SoftwareTest