// Allison Obourn
// CSE 143 - Lecture 14
// A partial set of unit tests for the LinkedIntList class. 

// You will need to download and set up JUnit to run this code
// directions for how to do this are in the slides

import org.junit.Assert;
import static org.junit.Assert.*;
import org.junit.Before;
import org.junit.Test;


public class LinkedIntListTest {

   // cases we should have tests for:
   //  index 0
   //  negative index
   //  index at the size
   //  list is empty, when full
   //  index > size
   //  between 0 and size


   // tests adding to an empty list
   @Test 
   public void addWhenEmptyTest() {
      IntList list = new LinkedIntList();
      list.add(0, 0);
      Assert.assertEquals("adding to an empty list", list.get(0), 0);
   }
   
   // tests that adding at a negative index throws an IllegalArgumentException
   @Test (expected = IllegalArgumentException.class)
   public void addAtNegativeIndexTest() {
      IntList list = new LinkedIntList();
      list.add(-1, 0);
   }
   
   
   // tests adding somewhere in the middle of a list
   @Test 
   public void addToMiddleTest() {
      IntList list = new LinkedIntList();
      list.add(1);
      list.add(2);
      list.add(1, 3);
      Assert.assertEquals("adding to the middle of a list, index 0",   
                           list.get(0), 1);
      Assert.assertEquals("adding to the middle of a list, index 1",   
                           list.get(1), 3);
      Assert.assertEquals("adding to the middle of a list, index 2",   
                           list.get(2), 2);
   }
}