软件测试实验三

题目二：

public class Calculator{
    private static int result=0; // 静态变量，用于存储运行结果
    public void setResult(int a){
        result=a;
    }
    public void add(int n) {
        result = result + n;
    }
    public void substract(int n) {
        result = result - 1; //故意的Bug，应该是 result =result-n
    }
    public void multiply(int n) {
        result = result * n;
    } // 假设此方法在项目完成过程中尚未写好
    public void divide(int n) {
        result = result / n;
    }
    public void square() {
        result = result * result;
    }
    public void squareRoot() { //求平方根
        result = (int)Math.sqrt(result); //Bug : 死循环
    }
    public void clear() { // 将结果清零
        result = 0;
    }
    public int getResult(){
        return result;
    }
}

测试类：

import org.junit.Test;

import static org.junit.Assert.assertEquals;

public class CalculatorTest {
    private Calculator calculator=new Calculator();
    @Test
    public void Testadd() throws Exception {
        calculator.setResult(0);
        calculator.add(-5);
        assertEquals(-5, calculator.getResult());
    }
    @Test
    public void Testsubstract() throws Exception {
        calculator.setResult(-5);
        calculator.substract(-5);
        assertEquals(10, calculator.getResult());
    }
    @Test
    public void Testmultiply() throws Exception {
        calculator.setResult(10);
        calculator.multiply(10);
        assertEquals(100, calculator.getResult());
    }
    @Test
    public void Testsquare() throws Exception {
        calculator.setResult(100);
        calculator.square();
        assertEquals(10000, calculator.getResult());
    }
    @Test
    public void TestsquareRoot() throws Exception {
        calculator.setResult(10000);
        calculator.squareRoot();
        assertEquals(100, calculator.getResult());
    }
    @Test
    public void Testclear() throws Exception {
        calculator.clear();
        assertEquals(0, calculator.getResult());
    }

}

题目三：

import java.util.Scanner;

public class Year {
    public static int YearJudge(int year){
        int  result;
        Scanner sc = new Scanner(System.in);
//处理部分
        if (year % 4 == 0 && year % 100 !=0 ||year % 400 == 0) {
            result = 1;
        }else {
            result = 0;
        }
//输出部分
        return result;
    }
    public static void main(String[] args){}
}

测试类：

import org.junit.Test;
import static org.junit.Assert.assertEquals;

public class YearTest {
    @Test
    public void TestYearJudge() throws Exception {

        assertEquals(1, new Year().YearJudge(2012));
    }
}

题目四：

import java.util.Scanner;

public class Triangle {
    public static int TriangleJudge(int a,int b,int c){
        int flag=0;
        if(a+b<=c||a+c<=b||b+c<=a){
            flag=0;
        }else{
            if(a==(int)((a+b+c)/3)){
                flag=3;
            }else if(a!=b&&b!=c&&a!=c){
                flag=1;
            }else{
                flag=2;
            }
        }
        return flag;
    }
}

测试类：

import org.junit.Test;

import static org.junit.Assert.assertEquals;

public class TriangleTest {
    @Test
    public void TestTriangleJudge() throws Exception {

        assertEquals(2, new Triangle().TriangleJudge(1,3,3));
    }
}