// // README.md.swift // LittleLemon // // Created by Leon Haque on 16.2.2026. //

Little Lemon - Food Menu Demo App

A mobile iOS interview demo application showcasing modern Swift development practices with automated testing and code quality tools.

Overview

Little Lemon is an iOS app that displays food items (burgers, drinks, and desserts) fetched from a REST API. Users can browse items, apply discounts with an interactive slider, and filter by category.

Features

• Food Menu Display: Browse burgers, drinks, and desserts
• Dynamic Pricing: Interactive slider to calculate discounted prices
• Category Filtering: Filter menu items by category in the options view
• REST API Integration: Fetches menu data from external API

Tech Stack

• Language: Swift
• Platform: iOS
• Architecture: MVVM (Model-View-ViewModel)
• Code Quality: SwiftLint integration
• Testing: Unit tests & End-to-End UI tests

API

Data is fetched from:

https://free-food-menus-api-two.vercel.app/

Testing

The project includes comprehensive test coverage:

Unit Tests

• Calculator Tests: Price calculation and discount logic
• Network Tests: API request/response handling
• ViewModel Tests: Business logic validation

UI Tests (E2E)

• End-to-end user flows
• Category filtering
• Price discount interactions

Setup

1. Clone the repository

   git clone <repository-url>
   cd LittleLemon

2. Install SwiftLint (optional)

   brew install swiftlint

3. Open in Xcode

   open LittleLemon.xcodeproj

4. Build and Run

   • Select your target device/simulator
   • Press ⌘ + R to build and run

5. Tests

   • Run tests in IDE

SwiftLint

The project uses SwiftLint to enforce code style and conventions.

Configuration: .swiftlint.yml in project root

Run manually:

swiftlint lint

SwiftLint runs automatically during build for the main app target.

Development

Code Quality

• All code is linted with SwiftLint
• Follow Swift API Design Guidelines
• Maintain test coverage for new features

Testing Strategy

• Unit tests for all business logic (ViewModels, Calculators, Network layer)
• UI tests for critical user flows
• Mock network responses in unit tests

CI/CD

The project is configured to run automated tests in the development environment:

• SwiftLint checks on every build
• Unit tests executed automatically
• UI tests run on designated test targets