This is a regular news feed application built on a multimodal basis.

The application is divided into the following modules, some of which are platform-independent, i.e., can be used for macOS, tvOS, watchOS:

• Essential Feed - platform-agnostic framework, contain core logic
• Essential Feed API - platform-agnostic framework, contain logic collaborating with the network
• Essential Feed Cache - platform-agnostic framework, contain cache logic using CoreData storage.
• Essential Feed Presentation - platform agnostic framework, contain presentation logic
• Essential Feed iOS - contain UIKit representation logic.
• Essential App - application module. Contain composition logic.

This approach demonstrates a flexible architecture that makes the code extensible.
Multi-modularity is illustrated in the picture below.

All application modules are tested by using unit tests;
Essential Feed Cache and Essential Feed API modules are additionally covered by the integration tests.
Essential Feed iOS additionally covered by snapshot tests;

The main development in the project is in the ‘develop’ branch. Each push / pull_request in the main branch trigger
CI_macOS - run tests for platform-agnostic modules on “platform=macOS”
CI_iOS - run tests for all modules which should be available on iOS, including integration tests on “name=iPhone 12,OS=14.2”
It also triggers the job to deploy the build result in TestFlight.

1. Localization on 3 languages
2. Dark / light mode
3. Support accessibility fonts
4. Prefetching cells

Feed Image Use Cases