jest-async

What problem does it solve?

This Skill simplifies the process of testing asynchronous operations in JavaScript using Jest, ensuring your code handles callbacks, promises, and timers reliably.

Core Features & Use Cases

• Async/Await & Promises: Write clear tests for asynchronous functions using async/await and promise-based assertions like resolves and rejects.
• Timer Mocks: Effectively test code involving setTimeout, setInterval, and debounced/polled functions using Jest's fake timers.
• Event & Stream Testing: Verify event emission and data flow through streams in your asynchronous code.
• Use Case: Ensure your API client correctly handles responses and errors, or that your background job processing logic completes within expected timeframes.

Quick Start

Use the jest-async skill to write a test for an async function that fetches user data.