Testing async method in react with jest

I am a newbie in unit testing and I have 2 files:

RestaurantReducer

import * as Const from '../constants/Const'

const RestaurantReducer = (state = {
    restaurantList: []
}, action) => {
    switch (action.type) {
        case Const.GET_RESTAURANT_LIST: {

            return {
                ...state,
                restaurantList: action.payload
            };
        }
    }
    return state;
};

export default RestaurantReducer;

and RestauntActions.js

export function getRestaurantList() {
    return dispatch => {
        axios({
            method: "GET",
            url: URLS.URL_RESTAURANT_LIST
        }).then((response) => {
            dispatch({
                type: CONST.GET_RESTAURANT_LIST,
                payload: response.data
            })
        })
    }
}

and my test:

describe('request reducer', () => {

    it('Default values', () => {
        expect(restReducer(undefined, {type: 'unexpected'})).toEqual({
          restaurantList: []
        });
    });

    // ---------------- Dont know how to check this -------------------
    it('Async data',async () => {

        expect(restReducer(undefined, {
            type: 'GET_RESTAURANT_LIST',
        })).toEqual({
            ...state,
            restaurantList: []
        });
    });
});

I do not know how to go about it. Can you check the connection or data that come from the server? Can such data simulate but they are dynamic.