test('differences: jsonForm - JSON file', () => {
  const pathToFile1 = './__tests__/__fixtures__/beforeAST.json';
  const pathToFile2 = './__tests__/__fixtures__/afterAST.json';
  const pathToResult = './__tests__/__fixtures__/resultJsonAST.json';
  const expected = fs.readFileSync(pathToResult, 'utf8');