How to run unit tests?

[panigrah]

Hi, I am considering using this instead of redux-sagas to manage all my api calls. Sagas makes it easy to test actions and dispatches.

What is the recommended way to test my app when using redux-axios-middleware to make api calls?

thanks,

[doque]

You could use https://github.com/arnaudbenard/redux-mock-store together with https://github.com/ctimmerm/axios-mock-adapter for testing and then check if your mock store contains your expected actions.

import configureMockStore from 'redux-mock-store';
import thunk from 'redux-thunk';
import axios from 'axios';
import MockAdapter from 'axios-mock-adapter';

const MockApi = new MockAdapter(axios);
const middlewares = [thunk.withExtraArgument(axios)];
const mockStore = configureMockStore(middlewares);
const store = mockStore();

test('dispatches LOAD_STUFF_SUCCESS if everything works correctly', () => {
  MockApi.onGet(BASE_URL).reply(200, {
    stuff: 'stuff'
  });
  const expectedAction = { type: 'LOAD_STUFF_SUCCESS' };

  return store.dispatch(loadStuff()).then(() => {
    expect(
      store.getActions().find(a => a.type === expectedAction.type)
    ).toBeDefined();
  });
});

// If you need, you can test explicitly for _ERROR and _SUCCESS,
// but I would just rely on this library doing its job correctly.
test('dispatches LOAD_STUFF_ERROR if something goes wrong', () => {
  MockApi.onGet(BASE_URL).reply(404);
  const expectedAction = { type: 'LOAD_STUFF_ERROR' };

  return store.dispatch(loadStuff()).then(() => {
    expect(
      store.getActions().find(a => a.type === expectedAction.type)
    ).toBeDefined();
  });
});

And loadStuff() is a regular action creator:

export const BASE_URL = 'https://example.com/api';

export const loadStuff = () => ({
  type: 'LOAD_STUFF',
  payload: {
    request: {
      url: BASE_URL
    }
  }
});

Hope this helps!