Simple use of JUnit to test ArrayList : Unit Test « Development Class « Java

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Java » Development Class » Unit Test 




Simple use of JUnit to test ArrayList
Simple use of JUnit to test ArrayList
 
// : c15:JUnitDemo.java
//Simple use of JUnit to test ArrayList
//{Depends: junit.jar}
//From 'Thinking in Java, 3rd ed.' (c) Bruce Eckel 2002
//www.BruceEckel.com. See copyright notice in CopyRight.txt.

import java.util.*;
import junit.framework.*;

//So we can see the list objects being created,
//and keep track of when they are cleaned up:
class CountedList extends ArrayList {
  private static int counter = 0;

  private int id = counter++;

  public CountedList() {
    System.out.println("CountedList #" + id);
  }

  public int getId() {
    return id;
  }
}

public class JUnitDemo extends TestCase {
  private CountedList list = new CountedList();

  // You can use the constructor instead of setUp():
  public JUnitDemo(String name) {
    super(name);
    for (int i = 0; i < 3; i++)
      list.add("" + i);
  }

  // Thus, setUp() is optional, but is run right
  // before the test:
  protected void setUp() {
    System.out.println("Set up for " + list.getId());
  }

  // tearDown() is also optional, and is called after
  // each test. setUp() and tearDown() can be either
  // protected or public:
  public void tearDown() {
    System.out.println("Tearing down " + list.getId());
  }

  // All tests have method names beginning with "test":
  public void testInsert() {
    System.out.println("Running testInsert()");
    assertEquals(list.size()3);
    list.add(1"Insert");
    assertEquals(list.size()4);
    assertEquals(list.get(1)"Insert");
  }

  public void testReplace() {
    System.out.println("Running testReplace()");
    assertEquals(list.size()3);
    list.set(1"Replace");
    assertEquals(list.size()3);
    assertEquals(list.get(1)"Replace");
  }

  // A "helper" method to reduce code duplication. As long
  // as the name doesn't start with "test," it will not
  // be automatically executed by JUnit.
  private void compare(ArrayList lst, String[] strs) {
    Object[] array = lst.toArray();
    assertTrue("Arrays not the same length", array.length == strs.length);
    for (int i = 0; i < array.length; i++)
      assertEquals(strs[i](Stringarray[i]);
  }

  public void testOrder() {
    System.out.println("Running testOrder()");
    compare(list, new String[] { "0""1""2" });
  }

  public void testRemove() {
    System.out.println("Running testRemove()");
    assertEquals(list.size()3);
    list.remove(1);
    assertEquals(list.size()2);
    compare(list, new String[] { "0""2" });
  }

  public void testAddAll() {
    System.out.println("Running testAddAll()");
    list.addAll(Arrays.asList(new Object[] { "An""African""Swallow" }));
    assertEquals(list.size()6);
    compare(list,
        new String[] { "0""1""2""An""African""Swallow" });
  }

  public static void main(String[] args) {
    // Invoke JUnit on the class:
    junit.textui.TestRunner.run(JUnitDemo.class);
  }
///:~
           
         
  














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