Java Tutorial/JUnit/Introduction

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How To Run A JUnit Test

   <source lang="java">

javac Largest.java TestLargest.java java junit.textui.TestRunner TestLargest


import junit.framework.TestCase; public class TestLargest extends TestCase {

 public TestLargest(String name) {
   super(name);
 }
 public void testOrder2() {
   int[] arr = new int[3];
   arr[0] = 8;
   arr[1] = 9;
   arr[2] = 7;
   assertEquals(9, Largest.largest(arr));
 }

} class Largest {

 /**
  * Return the largest element in a list.
  * 
  * @param list
  *            A list of integers
  * @return The largest number in the given list
  */
 public static int largest(int[] list) {
   int index, max = Integer.MAX_VALUE;
   for (index = 0; index < list.length - 1; index++) {
     if (list[index] > max) {
       max = list[index];
     }
   }
   return max;
 }

}</source>





Test case method should start with test

   <source lang="java">

import junit.framework.TestCase; public class TestSimple extends TestCase {

 public TestSimple(String name) {
   super(name);
 }
 public void testAdd() {
   assertEquals(2, 1 + 1);
 }
 public void testAdds() {
   assertEquals(2, 1 + 1);
   assertEquals(4, 2 + 2);
   assertEquals(-8, -12 + 4);
 }

}</source>