📣 Why Promises Should Be Mockable
📣 Why Promises Should Be Mockable “Asynchronous code is easy to write — but hard to test.” Promises revolutionized async programming by replacing callback hell with chainable logic. But when it comes to testing , native Promises behave like black boxes : once a Promise starts, it runs independently — out of your control. If your app depends on multiple async sources — APIs, WebSockets, or events — you likely faced this problem: you can’t pause , manipulate , or mock Promises mid-flow. That’s exactly what MockChain solves. 💡 The Idea MockChain is a drop-in replacement for Promise , designed for one purpose: To make asynchronous operations controllable, testable, and deterministic . Instead of waiting for a real async event, you can inject outcomes in your tests — as if the async process had completed. import { MockChain } from '@fizzwiz/mockchain' ; // In your code, implement an async flow by a MockChain ...