This commit is related to the article BAEL-7089 (#15037)

This commit aims to add a test class named "RemoveQueueElementsUnitTest" that provides code snippets for removing elements from a queue.

core-java-modules/core-java-collections-5/src/test/java/com/baeldung/removequeueelements/RemoveQueueElementsUnitTest.java

@@ -0,0 +1,60 @@
+package com.baeldung.removequeueelements;
+
+import org.junit.Test;
+
+import java.util.LinkedList;
+import java.util.Queue;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+public class RemoveQueueElementsUnitTest {
+    @Test
+    public void givenQueueWithEvenAndOddNumbers_whenRemovingEvenNumbers_thenOddNumbersRemain() {
+        Queue<Integer> queue = new LinkedList<>();
+        Queue<Integer> evenElementsQueue = new LinkedList<>();
+        queue.add(1);
+        queue.add(2);
+        queue.add(3);
+        queue.add(4);
+        queue.add(5);
+
+        while (queue.peek() != null) {
+            int element = queue.remove();
+            if (element % 2 != 0) {
+                evenElementsQueue.add(element);
+            }
+        }
+
+        assertEquals(3, evenElementsQueue.size());
+        assertTrue(evenElementsQueue.contains(1));
+        assertTrue(evenElementsQueue.contains(3));
+        assertTrue(evenElementsQueue.contains(5));
+    }
+
+    @Test
+    public void givenStringQueue_whenRemovingStringsThatStartWithA_thenStringElementsRemain() {
+        Queue<String> queue = new LinkedList<>();
+        Queue<String> stringElementsQueue = new LinkedList<>();
+        queue.add("Apple");
+        queue.add("Banana");
+        queue.add("Orange");
+        queue.add("Grape");
+        queue.add("Mango");
+
+
+        while (queue.peek() != null) {
+            String element = queue.remove();
+            if (!element.startsWith("A")) {
+                stringElementsQueue.add(element);
+            }
+        }
+
+        assertEquals(4, stringElementsQueue.size());
+        assertTrue(stringElementsQueue.contains("Banana"));
+        assertTrue(stringElementsQueue.contains("Orange"));
+        assertTrue(stringElementsQueue.contains("Grape"));
+        assertTrue(stringElementsQueue.contains("Mango"));
+    }
+
+}