storybook/docs/snippets/react/mock-context-container.js.mdx

```js
// ProfilePage.stories.js

import React from 'react';
import ProfilePage from './ProfilePage';
import UserPosts from './UserPosts';
import { normal as UserFriendsNormal } from './UserFriends.stories';

export default {
  title: 'ProfilePage',
};

const ProfilePageProps = {
  name: 'Jimi Hendrix',
  userId: '1',
};

const context = {
  // We can access the `userId` prop here if required:
  UserPostsContainer({ userId }) {
    return <UserPosts {...UserPostsProps} />;
  },
  // Most of the time we can simply pass in a story.
  // In this case we're passing in the `normal` story export
  // from the `UserFriends` component stories.
  UserFriendsContainer: UserFriendsNormal,
};

export const normal = () => {
  return (
    <ProfilePageContext.Provider value={context}>
      <ProfilePage {...ProfilePageProps} />
    </ProfilePageContext.Provider>
  );
};
```