lab1

Tasks:

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.

a)       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.  

Requirements for the experiment:

1. Finish the tasks above individually.
2. Check in your java code and junit test program to github and send the URL to tjuscsst@qq.com
3. Post your experiment report to your blog and send the URL to tjuscsst@qq.com , the following information should be included in your report:

a)       The brief description that you install junit, hamcrest and eclemma.

b)       The test result and coverage report (printscreen) of your tests on triangle problem.------------------------------------------------------------------------------------------------------------------

一.添加junit-4.12.jar， hamcrest-all-1.3.jar 和hamcrest

 1.在eclipse中新建一个项目，建立如图所示的项目结构

通过build path 添加junit-4.12.jar， hamcrest-all-1.3.jar到项目中。

2 安装 eclemma插件

  help—>eclipse marketplace

如下图搜 eclemma 点击installed

 

二。

在src和test中建立相同名称的包（shang）

  编写lab1类和测试类testlab

package shang;

public class Lab1 {
    public String triangle(int a, int b, int c){
        String str;
        if((a+b) <= c || (a+c)<= b || (b+c)<= a ){
            str = new String("It is not a triangle");
            return str;
        }
        else if(a==b && b==c){
             str = new String("The triangle is equilateral");
        return str;
        }
        else if(a==b || b==c || a==c){
             str = new String("The triangle is isosceles");
            return str;
        }
        else
             str = new String("The triangle is scalene");
        return str;                
    }
}

 

package shang;

import static org.junit.Assert.*;

import org.junit.Test;

public class TestLab1 {
  private Lab1 lab1;
  private Lab1 lab2;
  private Lab1 lab3;
  private Lab1 lab4;
  @Test
  public void testTriangle(){
      lab1 = new Lab1();
      assertEquals((new String("It is not a triangle")),lab1.triangle(1,1 ,2 ));
      lab2 = new Lab1();
      assertEquals((new String("The triangle is equilateral")),lab2.triangle(1,1 ,1));
      lab3 = new Lab1();
      assertEquals((new String("The triangle is isosceles")),lab3.triangle(2,2 ,3 ));
      lab4 = new Lab1();
      assertEquals((new String("The triangle is scalene")),lab4.triangle(2,3 ,4 ));
  }
}
运行结果：