Need assistance in asnwering the TODO parts of the test below. package cs271.lab.list; import static org.junit.Assert.assertEquals; import static org.junit.Assert.assertTrue; import static org.junit.Assert.fail; import java.util.ArrayList; import java.util.LinkedList; import java.util.Arrays; import java.util.List; import org.junit.After; import org.junit.Before; import org.junit.Test; public class TestList { private List list; @Before public void setUp() throws Exception { list = new ArrayList(); // TODO also try with a LinkedList - does it make any difference? list = new LinkedList<>(); } @After public void tearDown() throws Exception { list = null; } @Test public void testSizeEmpty() { assertTrue(list.isEmpty()); assertEquals(0, list.size()); try { list.get(0); fail("there should not be any items in the list"); } catch (Exception ex) { } } @Test public void testSizeNonEmpty() { // TODO fix the expected values in the assertions below list.add(77); assertEquals(false, list.isEmpty()); assertEquals(1, list.size()); assertEquals(77, list.get(0).intValue()); } @Test public void testContains() { // TODO write assertions using assertEquals(false, list.contains(77)); list.add(77); assertEquals(true, list.contains(77)); // list.contains(77) // that hold before and after adding 77 to the list // remove this line when done } @Test public void testAddMultiple() { list.add(77); list.add(77); list.add(77); // TODO fix the expected values in the assertions below assertEquals(3, list.size()); assertEquals(0, list.indexOf(77)); assertEquals(77, list.get(1).intValue()); assertEquals(2, list.lastIndexOf(77)); } @Test public void testAddMultiple2() { list.add(33); list.add(77); list.add(44); list.add(77); list.add(55); list.add(77); list.add(66); // TODO fix the expected values in the assertions below assertEquals(7, list.size()); assertEquals(1, list.indexOf(77)); assertEquals(5, list.lastIndexOf(77)); assertEquals(44, list.get(2).intValue()); assertEquals(77, list.get(3).intValue()); assertEquals(Arrays.asList(33, 77, 44, 77, 55, 77, 66), list); } @Test public void testRemoveObject() { list.add(3); list.add(77); list.add(4); list.add(77); list.add(5); list.add(77); list.add(6); list.remove(5); // what does this method do? // TODO fix the expected values in the assertions below assertEquals(6, list.size()); assertEquals(1, list.indexOf(77)); assertEquals(3, list.lastIndexOf(77)); assertEquals(4, list.get(2).intValue()); assertEquals(77, list.get(3).intValue()); list.remove(Integer.valueOf(5)); // what does this one do? assertEquals(5, list.size()); assertEquals(1, list.indexOf(77)); assertEquals(3, list.lastIndexOf(77)); assertEquals(4, list.get(2).intValue()); assertEquals(77, list.get(3).intValue()); } @Test public void testContainsAll() { list.add(33); list.add(77); list.add(44); list.add(77); list.add(55); list.add(77); list.add(66); // TODO using containsAll and List.of (see above), // 1) assert that list contains all five different numbers added assertEquals(Arrays.asList(33, 77, 44, 77, 55, 77, 66), list); // 2) assert that list does not contain all of 11, 22, and 33 assertEquals(false, list.containsAll(Arrays.asList(11, 22, 33))); // remove this line when done } @Test public void testAddAll() { // TODO in a single statement using addAll and List.of, list.addAll((Arrays.asList(33, 77, 44, 77, 55, 77, 66))); // add items to the list to make the following assertions pass // (without touching the assertions themselves) assertEquals(7, list.size()); assertEquals(33, list.get(0).intValue()); assertEquals(77, list.get(1).intValue()); assertEquals(44, list.get(2).intValue()); assertEquals(77, list.get(3).intValue()); assertEquals(55, list.get(4).intValue()); assertEquals(77, list.get(5).intValue()); assertEquals(66, list.get(6).intValue()); } @Test public void testRemoveAll() { list.add(33); list.add(77); list.add(44); list.add(77); list.add(55); list.add(77); list.add(66); // TODO in a single statement using removeAll and List.of, list.removeAll((Arrays.asList(33, 44, 55, 66))); // remove items from the list to make the following assertions pass // (without touching the assertions themselves) assertEquals(3, list.size()); assertEquals(List.of(77, 77, 77), list); } @Test public void testRetainAll() { list.add(33); list.add(77); list.add(44); list.add(77); list.add(55); list.add(77); list.add(66); // TODO in a single statement using retainAll and List.of, list.retainAll((Arrays.asList(77, 77, 77))); // remove items from the list to make the following assertions pass // (without touching the assertions themselves) assertEquals(3, list.size()); assertEquals(List.of(77, 77, 77), list); } @Test public void testSet() { list.add(33); list.add(77); list.add(44); list.add(77); list.add(55); list.add(77); list.add(66); // TODO use the set method to change specific elements in the list list.set(1, 99); list.set(3, 99); list.set(5, 99); // such that the following assertions pass // (without touching the assertions themselves) assertEquals(7, list.size()); assertEquals(33, list.get(0).intValue()); assertEquals(99, list.get(1).intValue()); assertEquals(44, list.get(2).intValue()); assertEquals(99, list.get(3).intValue()); assertEquals(55, list.get(4).intValue()); assertEquals(99, list.get(5).intValue()); assertEquals(66, list.get(6).intValue()); } @Test public void testSubList() { list.add(33); list.add(77); list.add(44); list.add(77); list.add(55); list.add(77); list.add(66); // TODO fix the arguments in the subList method so that the assertion // passes assertEquals(List.of(44, 77, 55), list.subList(2, 5)); } }