epicTestExample.js

import { ActionsObservable, StateObservable } from 'redux-observable';

...
it('expects to work perfectly', async () => {
  const mockedResponse = {};
  const action$ = ActionsObservable.of(action.actionRequest());
  const expected = [
    addDataAction(mockedResponse), // action 1
    pushInfoSnackbar('created successfully') // action 2
  ];

  mockAxios.onGet().reply(200, mockedResponse);

  const epic = await exampleEpic(action$)
    .pipe(toArray())
    .toPromise();

  expect(epic).toEqual(expected);
});