* Find user by ID * @param id User ID * @returns Promise resolving to User or null if not found

* Delete user by ID * @param id User ID * @returns Promise resolving to boolean indicating success

* Create a new user * @param userData User data including password hash * @returns Promise resolving to created User

* Make authenticated request with reliability improvements

* Make authenticated request with reliability improvements

* Make HTTP request to test server

* Make HTTP request to test server

* Update user information * @param id User ID * @param userData Updated user data * @returns Promise resolving to updated User or null if not

* Remove item from cart * @param userId User ID * @param productId Product ID * @returns Promise resolving to boolean indicating success

* Create a new order * @param userId User ID * @param totalAmount Total order amount * @param mysqlResult Optional MySQL result for dual-writ

* Create a test user with authentication

* Create a test user with authentication

Helper to create a ClientError with specified error code.

* Get product by ID * @param productId Product ID * @returns Promise resolving to Product or null if not found

* Update product information * @param productId Product ID * @param sellerId Seller ID (for ownership verification) * @param productData Upda

* Delete product * @param productId Product ID * @param sellerId Seller ID (for ownership verification) * @returns Promise resolving to boole

Validate configuration parameters. Raises: ValueError: If any configuration parameter is invalid

* Create a new product * @param sellerId Seller ID * @param productData Product creation data * @returns Promise resolving to created Product

* Update product inventory * @param productId Product ID * @param quantity New inventory quantity * @returns Promise resolving to boolean ind

* Get user orders with pagination * @param userId User ID * @param limit Maximum number of orders to return * @param offset Number of orders

* Upgrade user to seller status * @param id User ID * @returns Promise resolving to updated User or null if not found

* Clear all items from user's cart * @param userId User ID * @returns Promise resolving to boolean indicating success

* Update order status * @param orderId Order ID * @param status New order status * @returns Promise resolving to boolean indicating success

* Validate error response

* Validate error response

* Add item to cart or update quantity if exists * @param userId User ID * @param productId Product ID * @param quantity Quantity to add *

Generate CSV file with sorted timestamps. Creates records with chronologically sorted timestamps to simulate a hot partition scenario

* Get products with filtering and pagination * @param filters Search filters * @param page Page number * @param limit Items per page * @re

* Search products by term * @param searchTerm Search term * @param page Page number * @param limit Items per page * @returns Promise resol

* Get all categories * @returns Promise resolving to array of Categories

* Find user by username * @param username Username to search for * @returns Promise resolving to User or null if not found

* Get specific cart item by user and product * @param userId User ID * @param productId Product ID * @returns Promise resolving to ShoppingCa

* Get order by ID with items * @param orderId Order ID * @returns Promise resolving to OrderWithItems or null if not found

* Setup complete scenario with unique usernames for each call

* Setup complete scenario with unique usernames for each call

* Check if category name exists * @param name Category name * @param excludeId Optional ID to exclude from check * @returns Promise resolving

* Find user by email * @param email Email to search for * @returns Promise resolving to User or null if not found

* Update cart item quantity * @param userId User ID * @param productId Product ID * @param quantity New quantity * @returns Promise resolv

* Get category path from root to category * @param categoryId Category ID * @returns Promise resolving to array of Categories in path

* Validate cart inventory availability * @param userId User ID * @returns Promise resolving to validation result

* Wait for a specific amount of time

* Get all cart items for a user with product details * @param userId User ID * @returns Promise resolving to array of ShoppingCartItemWithProduc

* Check if product has sufficient inventory * @param productId Product ID * @param requiredQuantity Required quantity * @returns Promise reso

* Validate response structure

* Validate response structure

Check if an error is permanent and should not be retried. Permanent errors include: - ValidationException: Invalid data format - Resource

Check if an error is transient and can be retried. Transient errors include: - ServiceUnavailable: Temporary service issues - InternalSer

* Reduce product inventory * @param productId Product ID * @param quantity Quantity to reduce * @returns Promise resolving to boolean indicat