st_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. 

1.安装junit 和 hamcrest

首先在官网下载hamcrest-all-1.3和junit-4.12

新建工程st_lab1 然后build path->configure build path->add library 和 add externel library 添加依赖项

2.安装eclemma

在hlep->market搜寻安装eclemma 之后选择重启

3.测试用例

(1)写三角形判定函数

package st_lab1;

public class Triangle {
     private int a,b,c;
     
     public Triangle(int a, int b, int c) {
               this.a = a;
               this.b = b;
               this.c = c;
            }
    
    public int getKind(int a, int b, int c)
    {
       int Kind = 3;
        if(a + b <= c || a+c <= b || b+c <= a)
        {
            Kind = -1;
            return Kind;
        }
        
        if( a == b && b == c)
        {
            Kind = 0;
            return Kind;
        }
        else if(a == c || b == c || a == b)
        {
            Kind = 1;
            return Kind;
        }
        else
        {
            Kind = 2;
            return Kind;
        }
    }



}

(2)参数化用例

import static org.junit.Assert.*;

import java.util.Arrays;
import java.util.Collection;

import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import org.junit.runners.Parameterized.Parameters;

import st_lab1.Triangle;

@RunWith(Parameterized.class)
public class TriangleTest {

	private int a;
	private int b;
	private int c;
	private int expected;
	
	private Triangle triangle;
	
	public TriangleTest(int expected,int a, int b,int c)
	{
		this.expected = expected;
		this.a = a;
		this.b = b;
		this.c = c;
	}
	@Before
	public void setUp() throws Exception {
		triangle = new Triangle(a, b, c);
	}

	@After
	public void tearDown() throws Exception {
	}

	@Parameters
	public static Collection<Object[]> getData()
	{
		return Arrays.asList(new Object[][]
				{
					{0,2,2,2},
					{1,5,2,5},
					{1,2,2,3},
					{2,1,2,3},
					{-1,7,6,1},
					{2,2,3,4},
					{-1,2,5,8},
				});	
	}
	@Test
	public void testGetKind() {
		assertEquals(this.expected, triangle.getKind(a, b, c));
	}

	

}

4.测试结果