l??使用方法

下載junit?

https://github.com/junit-team/junit/wiki/Download-and-Install?

????使用junit?jar包

l?一個簡單的test

??1.創建類

public class calc {/*** @param args*/public static int add(int first_num,int second_num) //add method{return first_num+second_num;}public static int minus(int first_num,int second_num) //minus method {return first_num-second_num;}public static int multiplication(int first_num,int second_num) //multiplication method{return first_num*second_num;}public static int division(int first_num,int second_num){return first_num/second_num; // division will throw ArithmeticException when the second_num=0}public static Boolean endless_loop() //endless loop{for(;;); //junit time out }}

　　

2.創建test?case

TestCase類給我們提供了setUp方法和tearDown方法，setUp方法的內容在測試你編寫的TestCase子類的每個testXxxx方法之前都會運行，而tearDown方法的內容在每個testXxxx方法結束以后都會執行。

我們創建setUp方法：

import static org.junit.Assert.*; import org.junit.Before; import org.junit.Ignore; import org.junit.Rule; import org.junit.Test;public class calcTest {@Testpublic void testAdd() {assertEquals(5, calc.add(2,3)); }@Testpublic void testMunius() {assertEquals(5, calc.minus(2,3));}@Ignore("testMultiplication() Not yet implemented") //ignore this case@Testpublic void testMultiplication() {assertEquals(6, calc.multiplication(2,3));}@Test(expected=ArithmeticException.class) // catch ArithmeticException exceptionpublic void testDivision () throws Exception {assertEquals(-1, calc.division(2,0));}@Test(timeout = 10000) //defined time out =10 secondspublic void testEndless_loop() {assertTrue("true",calc.endless_loop()); // can’t return within 10 seconds}}

　　

??3.結果

If?add?“@Ignore("testMultiplication()?Not?yet?implemented")?“??

Then?the?test?case?will?be?ignored.

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