ReferenceError: statechart is not defined when testing about react-automata HOT 3 CLOSED

import PropTypes from 'prop-types';
import { withStateMachine } from 'react-automata';

export const stateMachine = {
  initial: 'idle',
  states: {
    idle: {
      on: {
        GIFT: 'loading'
      }
    },
    loading: {
      onEntry: 'checkReceiverDetails',
      on: {
        SUCCEED: 'confirm',
        ERROR: 'error'
      }
    },
    confirm: {
      on: {
        TRANSFER: 'transferring'
      }
    },
    transferring: {
      onEntry: 'transferOwnership',
      on: {
        SUCCEED: 'done',
        ERROR: 'error'
      }
    },
    done: {
      onEntry: 'redirectToMarket'
    },
    error: {
      on: {
        GIFT: 'loading'
      }
    }
  }
};

class Giftgems extends PureComponent {
  static propTypes = {};

  render() {
    return (
      <div>
        <p>hello</p>
      </div>
    );
  }
}

export default withStateMachine(statechart)(Giftgems);

import { testStateMachine } from 'react-automata';
import GiftGems from '../components/GiftGems';

test('GiftGems works', () => {
  testStateMachine(GiftGems);
});