Testing async action creator that fetches some data from a local JSON file

I am trying to use jest to test an async action creator that fetches some data. I have scavenged through the redux-mock-store documentation but I actually did not grasp what I should do. Here is action:

import { Dispatch } from 'redux';

export interface Task {
  id: string;
  title: string;
  categoryTitle?: string;
  error?: null;
}

export interface Category {
  name: string,
  tasks: Task[]
}

export const getCategories = () => {
  return async (dispatch: Dispatch) => {
    const response = await axios.get<Category[]>(url);

    dispatch<GetCategoriesAction>({
      type: ActionTypes.getCategories,
      payload: response.data
    });
  };
};

How can I test it? Can someone guide me through the steps?