What are some common areas to test in an online shop application, such as ticket ordering, login functionality, and administration pages?

When testing an online shop application, common areas to focus on include: - Ticket ordering process to ensure users can add tickets to their cart, proceed to checkout, and successfully complete the purchase. - Login functionality to verify users can create an account, log in securely, and access their account information. - Administration pages to confirm that administrators can manage products, view orders, and perform necessary tasks to maintain the online shop.

// Sample code for testing ticket ordering process
// Add ticket to cart
$ticketId = 1;
$quantity = 2;
$cart->addItem($ticketId, $quantity);

// Proceed to checkout
$cart->checkout();

// Complete purchase
$paymentMethod = 'credit_card';
$paymentService->processPayment($paymentMethod);

// Verify purchase was successful
$orderId = $orderService->placeOrder($cart);
$order = $orderService->getOrder($orderId);
if ($order->getStatus() == 'completed') {
    echo 'Purchase was successful';
} else {
    echo 'Purchase failed';
}