test('differences: structure form - YML file', () => {
  const pathToFile1 = './__tests__/__fixtures__/beforeAST.yml';
  const pathToFile2 = './__tests__/__fixtures__/afterAST.yml';
  const pathToResult = './__tests__/__fixtures__/resultAST';
  const expected = fs.readFileSync(pathToResult, 'utf8');