// Importing Queue and Stack classes from the queue_stack.js file
const { Queue, Stack } = require('./queue_stack');

// Test for Queue class
console.log('--- Testing Queue ---');
const queue = new Queue();
queue.enqueue('A');
queue.enqueue('B');
queue.enqueue('C');
queue.print();  // Queue contents: A <- B <- C
queue.peek();   // Front element: A
queue.dequeue();  // A removed from the queue
queue.print();  // Queue contents: B <- C
queue.size();   // Size: 2
queue.clear();  // Queue cleared
queue.print();  // Queue is empty

// Test for Stack class
console.log('--- Testing Stack ---');
const stack = new Stack();
stack.push('1');
stack.push('2');
stack.push('3');
stack.print();  // Stack contents: 1 -> 2 -> 3
stack.peek();   // Top element: 3
stack.pop();    // 3 popped from the stack
stack.print();  // Stack contents: 1 -> 2
stack.size();   // Size: 2
stack.clear();  // Stack cleared
stack.print();  // Stack is empty