How do I test async actions in Redux using Jest?

How do I test async actions in Redux using Jest?

To test async actions in Redux with Jest, you can use middleware like redux-thunk or redux-saga. Do you have a specific action in mind?

Yes, I have an action that fetches data from an API.

Great! You can mock the API call using Jest's mocking functions. Would you like a code example?

Yes, please provide a code example for that.

Sure! Here's a simple example:

import configureMockStore from 'redux-mock-store';
import thunk from 'redux-thunk';
import { fetchData } from './actions';

const middlewares = [thunk];
const mockStore = configureMockStore(middlewares);

test('fetches successfully data from an API', () => {
  const store = mockStore({});
  return store.dispatch(fetchData()).then(() => {
    const actions = store.getActions();
    expect(actions[0]).toEqual({ type: 'FETCH_DATA_SUCCESS', payload: data });
  });
});

This tests that your action dispatches the correct action type and payload.