软件测试实验1 — Junit 安装与 triangle problem 的测试

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

选中新建的项目，右键->Propertise->Java Build Path->Add External JARs

然后选中之前下好的junit-4.12.jar与hamcrest-core-1.3.rc2.jar 

点击OK即引入成功

2.  Install Eclemma with Eclipse

将Eclemma压缩包解压到eclipse下的dropins文件夹。

打开eclipse，点击help->install new software->add->local->选择你下载的eclemma，点OK安装，然后提示重启，重启后安装完成。

重启后出现图标即表示安装完成。

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

 

Triangle.java:

 

package triangle;
public class Triangle {
    public static boolean isTriangle (int a, int b, int c){
        if ((a+b)>c&&(a+c)>b&&(b+c)>a){//the three number can constitute a triangle
            return true;
        }
        else {
            return false;
        }
    }
    
    public static boolean isEquilateral (int a, int b, int c){
        if (isTriangle(a,b,c)){
            if ( a == b && b == c ){
                return true;
            }
            else {
                return false;
            }
        }
        else {
            return false;
        }
    }
    
    public static boolean isIsosceles (int a, int b, int c){
        if (isTriangle(a,b,c)){
            if ( a == b || a == c || b == c ){
                return true;
            }
            else {
                return false;
            }
        }
        else {
            return false;
        }
    }
    
    public static boolean isRightTriangle (int a, int b, int c){
        if (isTriangle(a,b,c)){
            if ( a*a==b*b+c*c||b*b==a*a+c*c||c*c==a*a+b*b ){
                return true;
            }
            else {
                return false;
            }
        }
        else {
            return false;
        }
    }
    
     public static void Triangle (int a, int b, int c) { 
             if (isTriangle(a,b,c)){  //the three number can constitute a triangle
                if ( isEquilateral(a,b,c) ){
                    System.out.println ("The triangle is a equilateral!"); 
                }
                else if ( isIsosceles(a,b,c) ){
                    if (isRightTriangle(a,b,c)){
                        System.out.println ("The triangle is a isosceles right triangle!");
                    }
                    else{
                        System.out.println ("The triangle is a isosceles!"); 
                    }
                }
                else if (isRightTriangle(a,b,c)){
                    System.out.println ("The triangle is a Right triangle!");
                }
                else {
                    System.out.println ("The triangle is a scalene!");
                }
             }
             else {
                 System.out.println ("Can't constitute a triangle!");
             }
        } // end Triangle
    }

TriangleTest.java（全为正确时）:

package triangle;
import static org.junit.Assert.*;
import org.junit.Before;
import org.junit.Test;
public class TriangleTest {
    private Triangle tri;
    @Before
    public void setUp() throws Exception {
        tri = new Triangle();
    }
    @Test
    public void testIsTriangle() {
        assertEquals("判断三角形模块异常",true,tri.isTriangle(3, 4, 5));
    }
    @Test
    public void testIsEquilateral() {
        assertEquals("判断等边三角形模块异常",true,tri.isEquilateral(3, 3, 3));
    }
    @Test
    public void testIsIsosceles() {
        assertEquals("判断等腰三角形模块异常",true,tri.isIsosceles(3, 3, 4));
    }
    @Test
    public void testIsRightTriangle() {
        assertEquals("判断直角三角形模块异常",true,tri.isRightTriangle(3, 4, 5));
    }
    @Test
    public void testTriangle() {
        tri.Triangle(3, 4, 5);
    }
}

TriangleTest.java（有错误时）

package triangle;
import static org.junit.Assert.*;
import org.junit.Before;
import org.junit.Test;

public class TriangleTest {
    private Triangle tri;
    @Before
    public void setUp() throws Exception {
        tri = new Triangle();
    }

    @Test
    public void testIsTriangle() {
        assertEquals("判断三角形模块异常",true,tri.isTriangle(1, 1, 5));
    }

    @Test
    public void testIsEquilateral() {
        assertEquals("判断等边三角形模块异常",true,tri.isEquilateral(2, 3, 3));
    }

    @Test
    public void testIsIsosceles() {
        assertEquals("判断等腰三角形模块异常",true,tri.isIsosceles(3, 3, 4));
    }

    @Test
    public void testIsRightTriangle() {
        assertEquals("判断直角三角形模块异常",true,tri.isRightTriangle(3, 3, 5));
    }

    @Test
    public void testTriangle() {
        tri.Triangle(3, 3, 5);
    }
}

test the program with Junit:

 创建Junit测试用例：

 

测试结果：

无错误时：

有错误时：

覆盖率：