Software Testing, Lab 1

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

　　1.在github上下载两个jar包junit-4.12.jar和hamcrest-all-1.3.jar地址为https://github.com/junit-team/junit4/wiki/Download-and-Install

　　2.打开eclipse，新建项目，点击Project，选择Properties；

　　弹出如下界面，点击Add External JARs...，添加如上两个jar包。

2. Install Eclemma with Eclipse

　　将eclemma-2.3.3.zip解压缩到eclipse下的dropins文件夹中，我的路径为：D:\Download\eclipse\eclipse\dropins\eclemma-2.3.3。

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

　　3.1 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.

　　3.2 创建triangles类，编写代码，首先检测三条边是否可以构成三角形，如果构成，那是等边三角形还是等腰三角形或者是不等边三角形。代码如下：

package triangle;

public class triangles {

    public static String triangles(int a,int b,int c){

        if(a <= 0 || b <= 0 || c <= 0 || a + b <= c || a + c <= b || b + c <= a)

            return "Not a triangle";

        else {

            if(a == b && a == c)
                return "equilateral";

            else if(a == b || b == c || a == c)
                return "isosceles";

            else
                return "scalene";

        }
    }
}

　　3.3 创建测试类，及测试用例，利用JUnit进行测试，代码如下：

package triangle;

import static org.junit.Assert.*;

import java.util.Arrays;

import java.util.Collection;

import org.junit.Test;

import org.junit.runner.RunWith;

import org.junit.runners.Parameterized;

import org.junit.runners.Parameterized.Parameters;

@RunWith(Parameterized.class)

public class testTriangle {

    private int a;

    private int b;

    private int c;

    private String expected;

    public testTriangle(int a,int b, int c, String expected){

        this.a = a;

        this.b = b;

        this.c = c;

        this.expected= expected;

        }

    @Parameters

    public static Collection<Object[]> getData(){

     return Arrays.asList(new Object[][]{

     {-1, 1, 2, "Not a triangle"},

     {3, 2, 5, "Not a triangle"},

     {6, 6, 6, "equilateral"},

     {2, 5, 5, "isosceles"},

     {7, 8, 9, "scalene"}

     });

    }

    @Test

    public void test() {

    assertEquals(this.expected,triangles.triangles(a,b,c));

    }

}

　　3.4 利用JUnit进行测试，如下图，在testTriangle类上点击右键，选择run as, 然后选择JUnit Test。

　　测试结果如下：

　　3.5 点击如下图标，利用Eclemma进行覆盖统计。

　　结果如下图：

　　可见，对于测试类的覆盖率为100%。