testing redux async action creators with jest - redux

Question

I started to write tests for my application. I'm trying to create test for redux async creators.
The problem is when I run test I get following error :
Fetch all users › dispatch action loadUsersSuccess
Actions may not have an undefined "type" property. Have you misspelled a constant? Action: undefined
All actions have defined type constant so I dont understand what should be the problem.
const LOAD_ALL_USERS_SUCCESS = "src/containers/User/LOAD_ALL_USERS_SUCCESS";
const LOAD_ALL_USERS_FAILURE = "src/containers/User/LOAD_ALL_USERS_FAILURE";
//action creators
export function loadUsersSuccess(users) {
return {
type: LOAD_ALL_USERS_SUCCESS,
payload: users
};
}
export function loadUsersFailure(error) {
return {
type: LOAD_ALL_USERS_FAILURE,
payload: error
};
}
import nock from "nock";
import { loadUsersSuccess, loadUsersFailure } from "./ducks";
import configureStore from "redux-mock-store";
const middlewares = [];
const mockStore = configureStore(middlewares);
const LOAD_ALL_USERS_SUCCESS = "src/containers/User/LOAD_ALL_USERS_SUCCESS";
const LOAD_ALL_USERS_FAILURE = "src/containers/User/LOAD_ALL_USERS_FAILURE";
const users = [
{
first_name: "Emlynne",
last_name: "Spellacy",
email: "espellacy0#lycos.com",
gender: "Female",
age: 1965,
country: "Indonesia"
},
{
first_name: "Alie",
last_name: "Dalrymple",
email: "adalrymple1#telegraph.co.uk",
gender: "Female",
age: 1976,
country: "Pakistan"
}
];
function fetchData() {
return async (dispatch) => {
try {
const { data } = await axios.get("/users");
dispatch(loadUsersSuccess(data));
} catch (error) {
dispatch(loadUsersFailure(error));
}
};
}
describe("Fetch all users", () => {
afterEach(() => {
nock.cleanAll()
})
test("Should load all Users", () => {
nock("http://localhost:8000")
.get("api/users")
.reply(200, users);
const expectedAction = [
{
type: LOAD_ALL_USERS_SUCCESS,
payload: users
},
{
type: LOAD_ALL_USERS_FAILURE,
payload: "error"
}
];
const store = mockStore({});
return store.dispatch(fetchData()).then(() => {
expect(store.getActions()).toEqual(expectedAction);
});
});
});

Answer 1

The problem was that dispatch function didn't exist. So, I needed to add following lines.
import thunk from "redux-thunk";
const middlewares = [thunk];