Data Structure : Convert live test to Jest test. Remove live code & console.log

Data-Structures/Queue/test/QueueUsing2Stacks.test.js

@@ -0,0 +1,15 @@
+import { Queue } from '../QueueUsing2Stacks'
+
+describe('QueueUsing2Stacks', () => {
+  const queue = new Queue()
+
+  it('Check enqueue/dequeue', () => {
+    queue.enqueue(1)
+    queue.enqueue(2)
+    queue.enqueue(8)
+    queue.enqueue(9)
+
+    expect(queue.dequeue()).toBe(1)
+    expect(queue.dequeue()).toBe(2)
+  })
+})