forked from Hithomelabs/Princeton1
76 lines
2.0 KiB
Java
76 lines
2.0 KiB
Java
package com.hithomelabs.princeton1.module4;
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import java.util.Iterator;
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import org.junit.jupiter.api.AfterEach;
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import org.junit.jupiter.api.BeforeEach;
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import org.junit.jupiter.api.DisplayName;
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import org.junit.jupiter.api.Test;
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import static org.junit.jupiter.api.Assertions.*;
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class ArrayQueueTest {
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private Queue<Integer> queue;
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@BeforeEach
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void setUp() {
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queue = new ArrayQueue<Integer>();
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}
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@AfterEach
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void tearDown() {
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queue = null;
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}
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@Test
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@DisplayName("Empty queue must return size zero")
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public void testEmptyQueueSize(){
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assertEquals(0, queue.size());
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}
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@Test
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@DisplayName("Enqueuing must work as expected")
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public void testEnqueue(){
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queue.enqueue(1);
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queue.enqueue(2);
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assertEquals(2,queue.size());
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Iterator<Integer> iterator = queue.iterator();
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assertEquals(1, iterator.next());
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assertEquals(2, iterator.next());
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}
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@Test
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@DisplayName("Dequeueing must work as expected")
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public void testDequeue(){
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queue.enqueue(1);
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queue.enqueue(2);
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assertEquals(1, queue.dequeue());
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queue.enqueue(3);
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assertEquals(2, queue.size());
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assertEquals(2, queue.dequeue());
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assertEquals(3, queue.dequeue());
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assertEquals(0, queue.size());
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assertNull(queue.dequeue());
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}
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@Test
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@DisplayName("Testing resizable array and iterator")
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public void testResize(){
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for(int i = 0; i < 21; i++)
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queue.enqueue(i);
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for(int i = 0; i < 13; i++){
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queue.dequeue();
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}
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assertEquals(13, queue.dequeue());
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assertEquals(7,queue.size());
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Integer[] arr = new Integer[queue.size()];
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Iterator<Integer> iterator = queue.iterator();
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int count = 0;
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while(iterator.hasNext()){
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arr[count++] = iterator.next();
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}
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assertArrayEquals(new Integer[]{14, 15, 16, 17, 18, 19, 20}, arr);
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}
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} |