F_A_8_Test_app/src/reducers/getUser/index.js

import * as types from "../../constants/index";
import initialState from '../initialState';

export default function getUser(state = initialState.getUser, {type, payload: data, error }) {
    switch (type) {
        case types.USER_GET_REQUEST: {
            return {
                ...state,
                isFetching: true
            }
        }
        case types.USER_GET_REQUEST_SUCCESS: {
            return {
                ...state,
                isFetching: false,
                data
            }
        }
        case types.USER_GET_REQUEST_FAILURE: {
            return {
                ...state,
                isFetching: false,
                error
            }
        }
        default: {
            return state
        }
    }
}