Backend-Task: Jairo Blanco

[Arthus15]

Overview of the Solution

This project showcases a method for updating exchange rates by leveraging the CNB API and applying filters to target a specific set of currencies.

Project Structure

1. Console Application

The ExchangeRateUpdater.ConsoleUI serves as the entry point for the application, managing startup and dependency injection (DI). It also provides an example of how to use the API effectively.

2. Core Library

The ExchangeRateUpdater.Core library contains the primary logic and functionality of the solution. It includes utilities such as extensions, API adapters, and related components.
To simplify the design, all code resides within this library rather than being split into multiple modules.
A customizable API adapter design enables seamless integration with different exchange rate providers, adhering to the IExchangeRateApiAdapter interface.
The ExchangeRateProvider ensures that responsibilities remain clear and aligned with the Single Responsibility Principle.

3. Testing Framework

ExchangeRateUpdater.Testing: A utility-focused library built to streamline the creation of parallel tests. It reflects a personal testing style that prioritizes speed and clarity but can be extended with features like logging or test cancellation if needed.
ExchangeRateUpdater.Core.TestingSupport: A supplementary library offering tools for writing tests. While not essential for this task, it represents how production-level code is typically structured.

4. Unit and Integration Tests

The ExchangeRateUpdater.Core.UnitTests and ExchangeRateUpdater.Core.IntegrationTests libraries include sample tests to demonstrate the testing framework. Only a subset of classes is tested to keep the solution concise and focused.
This approach balances clarity, modularity, and extensibility, ensuring the solution is both practical and adaptable.