User List Kata

This code kata helps engineers practice skills related to TDD and Mobile development.

Goal

Build a simple screen that fetches and displays a list of users from a remote API.

Requirements

The screen should handle three states:

1. Loading — display a loading indicator while the request is in progress
2. Success — display the list of users showing their name and email
3. Error — display an error message if the request fails

API

Use the JSONPlaceholder users endpoint:

GET https://jsonplaceholder.typicode.com/users

This returns an array of user objects. You only need the name and email fields.

Constraints

• Use Test-Driven Development to drive your implementation
• The network layer should be abstracted so your logic is testable without making real HTTP requests
• UI state should be explicit and testable