ReferenceError: TestUtils is not defined

[mohit181191]

ReferenceError: TestUtils is not defined

import { h, render, Component } from "preact";
import Input from "../components/input"; // It is a input component
import { mount } from "enzyme";
let value;
const input = mount(<Input changeCallback={val => value = val}/>);
input.simulate('change');

I get the above error TestUtils is not defined. I'm facing below issues,

1. when i look in the preactEnzymeAdapter.js, there is no TestUtils. How to work with this library.
2. when i try to run input.setProps() method, I get this error
   TypeError: instance.setChildProps is not a function

[awinogradov]

So, I think the problem is here https://github.com/aweary/enzyme-adapter-preact/blob/master/__tests__/MountWrapper.spec.js

MountWrapper doesn't fully implement.