Обертка, которая не работает

SetTestWrapper.tsx

import React, { Component } from 'react';

interface Props {
  children: JSX.Element | any;
  prefix?: string;
  postfix?: string;
  customParentName?: string;
  customChildName?: string;
}

export class SetTestWrapper extends Component<Props> {
  render() {
    const parentName =
      this.props.customParentName
      || this.props.children._owner.elementType.name;

    const childrenName = this.props.customChildName
      || this.props.children.type.name
      || this.props.children.props.className;

    const prefix = this.props.prefix ? this.props.prefix + '_' : '';
    const postfix = this.props.postfix ? '_' + this.props.postfix : '';

    const dataTest = `${prefix}${parentName}_${childrenName}${postfix}`;
    return (
      <div data-test={dataTest}>
        {this.props.children}
      </div>
    );
  }
}