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 {
@Test
public void testAdd() {
assertEquals(5, calc.add(2,3));
}
@Test
public void testMunius() {
assertEquals(5, calc.minus(2,3));
}
@Ignore("testMultiplication() Not yet implemented") //ignore this case
@Test
public void testMultiplication() {
assertEquals(6, calc.multiplication(2,3));
}
@Test(expected=ArithmeticException.class) // catch ArithmeticException exception
public void testDivision () throws Exception {
assertEquals(-1, calc.division(2,0));
}
@Test(timeout = 10000) //defined time out =10 seconds
public 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.
