How do I test Redux middleware?

How do I test Redux middleware?

To test Redux middleware, you can use a testing library like Jest along with Redux's createStore function.

Can you show me an example of a test case for middleware?

Sure! Here's a simple example:

import { createStore, applyMiddleware } from 'redux';
import thunk from 'redux-thunk';
import rootReducer from './reducers';

const store = createStore(rootReducer, applyMiddleware(thunk));

// Test your middleware here

What should I focus on when writing tests for middleware?

Focus on testing the side effects, ensuring actions are dispatched correctly, and verifying the state changes.

Are there any common pitfalls to avoid?

Yes, avoid testing implementation details of the middleware and focus on the behavior and outcomes instead.