Testing the ArrayList implementation.

ArrayListTest.java

package adt.list;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;

import org.junit.Before;
import org.junit.Test;

/**
 * Testing the ArrayList implementation.
 * 
 * @author Samuel T. C. Santos
 * @version 1.0
 *
 */
public class ArrayListTest {

	private List<String> list;
	
	@Before
	public void setUp(){
		list = new ArrayList<String>();
	}
	
	@Test
	public void testListInit(){
		assertTrue(list.isEmpty());
		assertTrue(list.size() == 0);
	}
	
	@Test (expected = IllegalArgumentException.class)
	public void testInvalidCapacity(){
		list = new ArrayList<String>(-1);
	}
	
	@Test
	public void testAddElements(){
		list.add(0, "Karol");
		list.add(1, "Vanessa");
		list.add(2, "Amanda");
		
		assertEquals("Karol", list.get(0));
		assertEquals("Vanessa", list.get(1));
		assertEquals("Amanda", list.get(2));
		
		list.add(1, "Mariana");
		
		assertEquals("Karol", list.get(0));
		assertEquals("Mariana", list.get(1));
		assertEquals("Vanessa", list.get(2));
		assertEquals("Amanda", list.get(3));	
		
		assertTrue(list.size()==4);
	}
	
	@Test (expected = NullPointerException.class)
	public void testAddElementNull(){
		list.add(0, null);
	}
	
	@Test (expected = NullPointerException.class)
	public void testSetElementNull(){
		list.add(0, "Kheyla");
		list.set(0, null);
	}
	
	@Test
	public void testSetElement(){
		list.add(0, "Karol");
		list.add(1, "Vanessa");
		list.add(2, "Amanda");
		
		list.set(1, "Livia");
		
		assertEquals("Karol", list.get(0));
		assertEquals("Livia", list.get(1));
		assertEquals("Amanda", list.get(2));
	}
	
	@Test
	public void testRemoveElement(){
		list.add(0, "Karol");
		list.add(1, "Vanessa");
		list.add(2, "Amanda");
		
		assertEquals("Amanda", list.remove(2));
		assertTrue(list.size() == 2);
	}
	
	@Test (expected = IndexOutOfBoundsException.class)
	public void testRemoveWithEmptyList(){
		list.remove(0);
	}
}