Junit单元测试实验报告

实验二Junit单元测试实验报告实验内容：利用Junit对实验程序Point2d.java进行单元测试实验目的：掌握单元测试的方法，掌握在Eclipse里进行Junit测试的技术。实验步骤和结果：1、修改之前的Calculator的测试结果：(1)自动生成的CalculatorTest类代码：packageandycpp;publicclassCalculator{privatestaticintresult;//静态变量，用于存储运行结果publicvoidadd(intn){result=result+n;}publicvoidsubstract(intn){result=result-1;//Bug:正确的应该是result=result-n}publicvoidmultiply(intn){}//此方法尚未写好publicvoiddivide(intn){result=result/n;}publicvoidsquare(intn){result=n*n;}publicvoidsquareRoot(intn){for(;;);//Bug:死循环}publicvoidclear(){//将结果清零result=0;}publicintgetResult(){returnresult;}}(2)运行结果：自动生存的测试类完善测试类后的运行结果2、修改和完善Calculator类：packageandycpp;publicclassCalculator{privatestaticintresult;//静态变量，用于存储运行结果publicvoidadd(intn){result=result+n;}publicvoidsubstract(intn){result=result-n;//Bug:正确的应该是result=result-n}publicvoidmultiply(intn){result=result*n;}publicvoiddivide(intn){result=result/n;}publicvoidsquare(intn){result=n*n;}publicvoidsquareRoot(intn){result=(int)Math.sqrt(n);//Bug:死循环}publicvoidclear(){//将结果清零result=0;}publicintgetResult(){returnresult;}}3、修改后的Calculator的测试用例：(1)加法：操作数：2,、3；结果：5(2)减法：操作数：10、2；结果：8(3)乘法：操作数：10、2；结果：20(4)除法：操作数：8、2；结果：4(5)平方：操作数：3；结果：9(6)开方：操作数：4；结果：2代码：packageandycpp;importstaticorg.junit.Assert.*;importorg.junit.Before;importorg.junit.Ignore;importorg.junit.Test;publicclassCalculatorTest{privatestaticCalculatorcalculator=newCalculator();@BeforepublicvoidsetUp()throwsException{calculator.clear();}@TestpublicvoidtestAdd(){calculator.add(2);calculator.add(3);assertEquals(5,calculator.getResult());}@TestpublicvoidtestSubstract(){calculator.add(10);calculator.substract(2);assertEquals(8,calculator.getResult());}@TestpublicvoidtestMultiply(){calculator.add(10);calculator.multiply(2);assertEquals(20,calculator.getResult());}@TestpublicvoidtestDivide(){calculator.add(8);calculator.divide(2);assertEquals(4,calculator.getResult());}@TestpublicvoidtestSquare(){calculator.square(3);assertEquals(9,calculator.getResult());}@TestpublicvoidsquareRoot(){calculator.squareRoot(4);assertEquals(2,calculator.getResult());}}4、修改后的Calculator的测试结果：结果正确5、Point2d的测试用例：测试用例1：pt1=(0.0,0.0)pt2=(4.0,3.0)importstaticorg.junit.Assert.*;importorg.junit.Before;importorg.junit.Test;publicclassPoint2dTest{privatestaticPoint2dpt1=newPoint2d();privatestaticPoint2dpt2=newPoint2d(4.0,3.0);@BeforepublicvoidsetUp()throwsException{}@TestpublicvoidtestDistanceFrom(){assertEquals(5,pt1.distanceFrom(pt2),0.1);}@TestpublicvoidtestDistanceFromOrigin(){assertEquals(5,pt2.distanceFromOrigin(),0.1);}}6、Point2d的测试结果：两个测试用例结果均正确