软件测试 第一次试验

一、实验名称

利用Junit测试三角形的形状

二、实验内容

1、在IDEA中导入Junit和Hamcrest。

2、在IDEA中导入Eclemma。

3、编写判断三角形形状的程序并测试。

三、实验步骤

1、在IDEA中新建工程。

2、在工程下添加lib文件夹，把Junit、Hamcrest和Eclemma的jar包拷入文件夹。并将它设置为lib路径。

3、新建test文件夹并将其设置为测试的根目录。

4、在src文件夹下新建java类命名为Triangle，在test文件夹下新建java类命名为TriangleTest。

5、编写代码和测试用例。

6、通过TriangleTest来运行程序。

四、实验代码与实验结果

Trianle.java
/**
 * Created by luvian on 16/3/18.
 */
public class Triangle {
    private String side1;
    private String side2;
    private String side3;

    public Triangle() {

        this("0", "0", "0");
    }

    public Triangle(String s1, String s2, String s3) {
        this.side1 = s1;
        this.side2 = s2;
        this.side3 = s3;
    }

    public String determineTriangleType() {

        String type = "";

        int s1 = -1, s2 = -1, s3 = -1;
        String err = "";
        try {
            s1 = Integer.parseInt(side1);
        } catch (NumberFormatException e) {
            err += "Side 1 is not a number!
";
        }
        try {
            s2 = Integer.parseInt(side2);
        } catch (NumberFormatException e) {
            err += "Side 2 is not a number!
";
        }
        try {
            s3 = Integer.parseInt(side3);
        } catch (NumberFormatException e) {
            err += "Side 3 is not a number!
";
        }

        if (s1 <= 0 || s2 <= 0 || s3 <= 0) {
            err += "Please enter three positive numbers!
";
        }

        if ((s1 + s2 <= s3) || (s1 + s3 <= s2) || (s2 + s3 <= s1)) {
            err += "Cannot make a triangle!
";
        }

        if (s1 + s2 + s3 > 1000000) {
            err += "The triangle is too big
";
        }

        if (err.length() > 0) {
            type = err;
        } else {
            if ((s1 == s2) && (s2 == s3) && (s1 == s3)) {
                type = "Isosceles";
            } else if ((s1 == s3) && (s2 == s3)) {
                type = "Equilateral";
            } else {
                type = "Scalene";
            }
        }
        return type;
    }
}

TrianleTest.java

import org.junit.Test;

import java.util.HashSet;
import java.util.Set;

import org.junit.Test;
import static junit.framework.TestCase.fail;
import static org.junit.Assert.*;

/**
 * Created by luvian on 16/3/18.
 */
public class TriangleTest {
    @Test
    public void test() {
        Set<String>typeSet = new HashSet<String> ();
        typeSet.add("Equilateral");
        typeSet.add("Isosceles");
        typeSet.add("Scalene");

        Triangle t1 = new Triangle("a", "b", "c");
        String type1 = t1.determineTriangleType();
        if(typeSet.contains(type1)){
            fail("error of type");
            }

        Triangle t2 = new Triangle("1", "1", "1");
        String type2 = t2.determineTriangleType();
        if(!typeSet.contains(type2)){
            fail("error of type");
            }
        assertEquals("Isosceles", type2);
        }
}