import * as t from '@babel/types';
import { parse } from '@babel/parser';
import generator from '@babel/generator';

const code = `
import React from "react";
// 1111
class App extends React.Component {}
`;

describe('babel', () => {
  it('clone and generate', () => {
    expect(
      generator(
        t.cloneNode(
          parse(code, {
            sourceType: 'module',
          }),
          true,
          false,
        ),
        {
          retainLines: true,
        },
      ).code,
    ).toEqual(code);
  });
});

import React from "react";
// 1111
// 1111
class App extends React.Component {}

import React from "react";
// 1111
class App extends React.Component {}