如何在withHandlers、branch和withState重组酶中测试处理程序?

import React from 'react';
import {
  compose,
  withState,
  withHandlers,
  branch,
  pure,
  renderComponent,
} from 'recompose';

import Fields from './components/Fields';
import Flow from './components/Flow';

export const MODE = {
  preview: 'preview',
  edit: 'edit',
};

const inEditMode = ({ mode }) => mode === MODE.edit;

const Component = branch(
  inEditMode,
  renderComponent(Fields),
  renderComponent(Flow),
)(Flow);

const Tab = pure(props => <Component {...props} />);

export default compose(
  withState('mode', 'changeMode', props => {
    const path = props.path;

    return props.path ? MODE.preview : MODE.edit;
  }),
  withHandlers({
    changeMode: ({ changeMode }) => () => changeMode(currentState => currentState === MODE.preview ? MODE.edit : MODE.preview),
    onApprovalChange: ({ onAction, entity }) => data => {
      onAction({ ...data, status: 'UPDATED' }, data.id);
    },
  }),
)(Tab);

在上述组件中,我想测试以下内容:

1. 渲染 Component

2. inEditMode 组件的功能

3. 中存在处理程序 withState 和 withHandlers

4. branch 重组的实用性(我真的不认为我需要检查这个,因为他们可能已经检查过了,但假设我想测试这样的函数)