the first code which has a class in which I tried implementi

the first code which has a class in which I tried implementing the main methods needed for a proper queue. Unfortunately, I did not get it to work. I left the store field protected, so you should be able to directly access it from another class in the edu.buffalo.cse116 package. I also wrote the EmptyQueueException class for you to use. Write a JUnit test class whose methods call the enqueue(), dequeue(), or peek() method and verify they correctly update storeand fix the bugs in this class.

first code:

EmptyQueueException class

Solution

import junit.framework.TestCase; public class TestQueue extends TestCase { /** The Queue object to use in most test cases. */ private Queue testQueue; /** * Performs the base initial setup for all test cases. */ public void setUp() { this.testQueue = new Queue(5); } /** * Tests the two available constructor methods to verify * correctness. */ public void testConstructor() { try { this.testQueue = new Queue(-1); fail(\"Expected exception when creating Queue with invalid size.\"); } catch (Exception ex) { // Expected exception. } this.testQueue = new Queue(); assertEquals(\"Testing Queue object created with zero size.\", 0, this.testQueue.getSize()); this.testQueue = new Queue(3); assertEquals(\"Testing Queue object created with size set to 3.\", 3, this.testQueue.getSize()); } /** * Tests that the dequeue method properly removes the data * stored at the front of the queue. */ public void testDequeue() { try { this.testQueue.dequeue(); fail(\"Expected QueueException when dequeuing from an empty queue.\"); } catch (QueueException ex) { // Expected QueueException } catch (Exception ex) { fail(\"Unexpected exception occurred when dequeuing from an empty queue. Message: \" + ex.getMessage()); } try { this.testQueue.enqueue(\"3\"); assertEquals(\"Testing dequeuing a single object.\", \"3\", this.testQueue.dequeue()); assertEquals(\"Testing queue is empty after removing last item.\", true, this.testQueue.isEmpty()); this.testQueue.enqueue(\"4\"); this.testQueue.enqueue(\"5\"); this.testQueue.enqueue(\"2\"); assertEquals(\"Testing dequeuing a single object.\", \"4\", this.testQueue.dequeue()); this.testQueue.enqueue(\"3\"); this.testQueue.enqueue(\"1\"); this.testQueue.enqueue(\"6\"); assertEquals(\"Testing dequeuing a single object.\", \"5\", this.testQueue.dequeue()); } catch (QueueException ex) { fail(\"Unexpected QueueException occurred while enqueuing in dequeue test.\"); } } /** * Tests the dequeueAll method to ensure all data is properly * removed when called. */ public void testDequeueAll() { try { this.testQueue.enqueue(\"1\"); this.testQueue.enqueue(\"2\"); this.testQueue.enqueue(\"3\"); this.testQueue.enqueue(\"4\"); this.testQueue.enqueue(\"5\"); } catch (QueueException ex) { fail(\"Unexpected QueueException occurred during enqueue in dequeueAll test.\"); } assertEquals(\"Testing queue is full before calling dequeueAll method.\", true, this.testQueue.isFull()); this.testQueue.dequeueAll(); assertEquals(\"Testing queue is not full after calling dequeueAll method.\", false, this.testQueue.isFull()); assertEquals(\"Testing queue is empty after calling dequeueAll method.\", true, this.testQueue.isEmpty()); } /** * Tests the enqueue method to ensure data is added properly * under possible conditions. */ public void testEnqueue() { try { this.testQueue.enqueue(\"1\"); assertEquals(\"Testing enqueue method after adding one item.\", 1, this.testQueue.getCount()); this.testQueue.enqueue(\"2\"); this.testQueue.enqueue(\"3\"); this.testQueue.enqueue(\"4\"); this.testQueue.enqueue(\"5\"); } catch (QueueException ex) { fail(\"Unexpected QueueException occurred during enqueue test.\"); } assertEquals(\"Testing enqueue method that queue is full.\", true, this.testQueue.isFull()); try { this.testQueue.enqueue(\"6\"); fail(\"Expected QueueException when adding to a full queue.\"); } catch (QueueException ex) { // Expected QueueException } catch (Exception ex) { fail(\"Unexpected exception occurred when adding to a full queue. Message: \" + ex.getMessage()); } } /** * Tests the getCount method to ensure an accurate count * is maintained. */ public void testGetCount() { try { assertEquals(\"Testing getCount method in empty queue.\", 0, this.testQueue.getCount()); this.testQueue.enqueue(\"1\"); assertEquals(\"Testing getCount method after adding one object.\", 1, this.testQueue.getCount()); this.testQueue.enqueue(\"2\"); this.testQueue.enqueue(\"3\"); assertEquals(\"Testing getCount method.\", 3, this.testQueue.getCount()); this.testQueue.enqueue(\"4\"); this.testQueue.enqueue(\"5\"); } catch (QueueException ex) { fail(\"Unexpected QueueException occurred during enqueue in getCount test.\"); } assertEquals(\"Testing getCount method after queue is full.\", 5, this.testQueue.getCount()); try { this.testQueue.dequeue(); } catch (QueueException ex) { fail(\"Unexpected QueueException occurred during dequeue in getCount test.\"); } assertEquals(\"Testing getCount method after dequeuing one object.\", 4, this.testQueue.getCount()); this.testQueue.dequeueAll(); assertEquals(\"Testing getCount method after dequeuing all objects.\", 0, this.testQueue.getCount()); } /** * Tests the getSize method to ensure that the size is reflected * properly as to how much it can store. */ public void testGetSize() { assertEquals(\"Testing size of the queue.\", 5, this.testQueue.getSize()); this.testQueue = new Queue(); assertEquals(\"Testing size of the queue.\", 0, this.testQueue.getSize()); } /** * Tests the isEmpty method for correctness. */ public void testIsEmpty() { assertEquals(\"Testing the isEmpty method in an empty queue.\", true, this.testQueue.isEmpty()); try { this.testQueue.enqueue(\"1\"); } catch (QueueException ex) { fail(\"Unexpected QueueException occurred during enqueue in isEmpty test.\"); } assertEquals(\"Testing the isEmpty method in after data has been added.\", false, this.testQueue.isEmpty()); try { this.testQueue.dequeue(); } catch (QueueException ex) { fail(\"Unexpected QueueException occurred during dequeue in isEmpty test.\"); } assertEquals(\"Testing the isEmpty method in after all data has been dequeued.\", true, this.testQueue.isEmpty()); } /** * Tests the isFull method for correctness. */ public void testIsFull() { assertEquals(\"Testing the isFull method in an empty queue.\", false, this.testQueue.isFull()); try { this.testQueue.enqueue(\"1\"); this.testQueue.enqueue(\"2\"); this.testQueue.enqueue(\"3\"); this.testQueue.enqueue(\"4\"); assertEquals(\"Testing the isFull method just before the queue is full.\", false, this.testQueue.isFull()); this.testQueue.enqueue(\"5\"); } catch (QueueException ex) { fail(\"Unexpected QueueException occurred during enqueue in isFull test.\"); } assertEquals(\"Testing the isFull method in a full queue.\", true, this.testQueue.isFull()); try { this.testQueue.dequeue(); } catch (QueueException ex) { fail(\"Unexpected QueueException occurred during dequeue in isFull test.\"); } assertEquals(\"Testing the isFull method.\", false, this.testQueue.isFull()); } /** * Tests the peek method to ensure data can be retrieved, but * not removed from the Queue. */ public void testPeek() { try { this.testQueue.peek(); fail(\"Expected QueueException when peeking from an empty queue.\"); } catch (QueueException ex) { // Expected QueueException } catch (Exception ex) { fail(\"Unexpected exception occurred when peeking from an empty queue. Message: \" + ex.getMessage()); } try { this.testQueue.enqueue(\"3\"); assertEquals(\"Testing peeking a single object.\", \"3\", this.testQueue.peek()); assertEquals(\"Testing queue is not empty after peeking last item.\", false, this.testQueue.isEmpty()); this.testQueue.enqueue(\"4\"); this.testQueue.enqueue(\"5\"); this.testQueue.enqueue(\"2\"); assertEquals(\"Testing peeking a single object.\", \"3\", this.testQueue.peek()); this.testQueue.enqueue(\"1\"); } catch (QueueException ex) { fail(\"Unexpected QueueException occurred while enqueuing in peek test.\"); } try { assertEquals(\"Testing peeking a single object.\", \"3\", this.testQueue.peek()); } catch (QueueException ex) { fail(\"Unexpected QueueException occurred during a valid peek test.\"); } }