Why doesn't redux-toolkit export the thunk middleware

[azangru]

So redux-toolkit imports and re-exports ThunkAction and ThunkDispatch types from redux-thunk, and it also adds redux-thunk as a default middleware when configuring redux store. Why doesn't it re-export the thunk middleware itself? It might help ever so slightly when setting up a mock redux store for testing purposes: as of now the user would also need to install redux-thunk separately to set up the mock store as described in the redux docs:

import configureMockStore from 'redux-mock-store'
import thunk from 'redux-thunk' // <-- why not be able to import thunk from redux-toolkit directly?

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

[phryneas]

Honestly, it's just not really a use case we had in mind as we just use the "real" store for testing (at least I know I am).
There just isn't a lot of benefit from using redux-mock-store any more.

If you need the actions that were dispatched, just add an additional reducer in your test environment like

function actionsReducer(state = [], action) { return [...state, action] }

and you are rid of an additional dependency.

Also, most React tests nowadays are more integration-like, so many people don't even test reducers in isolations at all.

We'll probably add a few more testing-related things in a future update of RTK. Ideas are very welcome :)