test

test.js

import { ActionTypes } from '../createStore';
import isPlainObject from '../utils/isPlainObject';
import mapValues from '../utils/mapValues';
import pick from '../utils/pick';

/* eslint-disable no-console quotes no-unused-vars */

function getErrorMessage(key, action) {
    var actionType = action && action.type;
    var actionName = actionType && ('"${actionType.toString()}"') || ('an action');

    return (
        `Reducer "${key}" returned undefined handling ${actionName}. ` +
        `To ignore an action, you must explicitly return the previous state.`
    );
}

function verifyStateShape(initialState, currentState) {
    var reducerKeys = Object.keys(currentState);

    if (reducerKeys.length === 0) {
        console.error(
            'Store does not have a valid reducer. Make sure the argument passed ' +
            'to combineReducers is an object whose values are reducers.'
        );
        return;
    }

    if (!isPlainObject(initialState)) {
        console.error(
            'initialState has unexpected type of "' +
        ({}).toString.call(initialState).match(/\s([a-z|A-Z]+)/)[1] +
        '". Expected initialState to be an object with the following ' +
        `keys: "${reducerKeys.join('", "')}"`
        );
        return;
    }

    var unexpectedKeys = Object.keys(initialState).filter(
        key => reducerKeys.indexOf(key) < 0
    )
}