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Update ReverseQueueRecursionTest.java
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src/test/java/com/thealgorithms/datastructures/queues/ReverseQueueRecursionTest.java

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package com.thealgorithms.datastructures.queues;
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import static org.junit.jupiter.api.Assertions.assertEquals;
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import static org.junit.jupiter.api.Assertions.assertTrue;
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import java.util.LinkedList;
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import java.util.Queue;
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import org.junit.jupiter.api.Test;
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class ReverseQueueRecursionTest {
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@Test
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void testReverseMultipleElements() {
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Queue<Integer> queue = new LinkedList<>();
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queue.add(1);
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queue.add(2);
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queue.add(3);
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queue.add(4);
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ReverseQueueRecursion.reverseQueue(queue);
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assertEquals(4, queue.poll());
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assertEquals(3, queue.poll());
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assertEquals(2, queue.poll());
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assertEquals(1, queue.poll());
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assertTrue(queue.isEmpty());
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}
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@Test
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void testReverseSingleElement() {
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Queue<Integer> queue = new LinkedList<>();
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queue.add(42);
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ReverseQueueRecursion.reverseQueue(queue);
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assertEquals(42, queue.poll());
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assertTrue(queue.isEmpty());
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}
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@Test
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void testReverseEmptyQueue() {
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Queue<Integer> queue = new LinkedList<>();
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ReverseQueueRecursion.reverseQueue(queue);
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assertTrue(queue.isEmpty());
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}
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@Test
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void testReverseStringQueue() {
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Queue<String> queue = new LinkedList<>();
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queue.add("A");
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queue.add("B");
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queue.add("C");
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ReverseQueueRecursion.reverseQueue(queue);
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assertEquals("C", queue.poll());

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