Jest测试没有在子组件中触发父onClick函数

Question

因此，我测试了以下子组件，该子组件从其父级中的父级接收函数：

export interface IProps{
  parentClick: () => void;
}

export class Child extends React.Component<IProps, {}> {
    handleClick = () => {
      this.props.parentClick();
  }

  render () {
    return ( <button onClick={this.handleClick}>Click me</button> )
  }
}

在我的Jest测试中，我执行以下操作来检查this.props.parentClick是否被触发：

  it("button click fires", () => {
    const props = {
      parentClick: jest.fn();
    }

    const Child = enzyme.mount(<Child {...props} />);
    Child.find('button').simulate('click'); //shouldn't this trigger parentClick?
    expect(props.parentClick).toHaveBeenCalled();
  });

但测试失败说：

Expected mock function to have been called one time, but it was called zero times.

我该如何解决这个问题？