How to effectively test a Redux middleware that handles asynchronous actions?
I've looked through the documentation and I'm still confused about I'm working on a Redux application where I've implemented a middleware to handle asynchronous actions using `redux-thunk`. However, I'm struggling to write tests for this middleware to ensure that it correctly dispatches actions based on the results of API calls. The middleware looks something like this: ```javascript const asyncMiddleware = store => next => action => { if (typeof action === 'function') { return action(store.dispatch, store.getState); } return next(action); }; ``` I've tried using `jest` along with `redux-mock-store` to mock the store and dispatch actions, but I'm running into issues with testing the asynchronous behavior. My test setup looks like this: ```javascript import configureMockStore from 'redux-mock-store'; import thunk from 'redux-thunk'; import { myAsyncAction } from './actions'; const middlewares = [thunk]; const mockStore = configureMockStore(middlewares); describe('asyncMiddleware', () => { it('should dispatch the correct actions on successful API call', async () => { const store = mockStore({}); const expectedActions = [ { type: 'API_CALL_START' }, { type: 'API_CALL_SUCCESS', payload: { data: 'some data' } } ]; await store.dispatch(myAsyncAction()); const actions = store.getActions(); expect(actions).toEqual(expectedActions); }); }); ``` However, I'm working with this behavior when running the tests: ``` Expected: [ { type: 'API_CALL_START' }, { type: 'API_CALL_SUCCESS', payload: { data: 'some data' } } ] Received: [ { type: 'API_CALL_START' }, { type: 'API_CALL_FAILURE', payload: { behavior: 'Network behavior' } } ] ``` It seems like the API call is failing, but I want to ensure that my tests properly simulate the API response. How can I mock the API call effectively in my tests to ensure that the happy path is executed? I've looked into libraries like `jest.mock` and `nock`, but I'm unsure how to implement them in this context to simulate the API behavior correctly. For context: I'm using Javascript on Windows.