babel.js

import createBabelFile from 'babel-file';
import createBabylonOptions from 'babel-options';
import {buildCodeFrameError} from 'babel-errors';

let code = `
  console.log('hello world');
`;

let file = createBabelFile(code, {
  filename: 'hello-world.js',
  parserOpts: createBabylonOptions({
    stage: 2,
    jsx: true,
    flow: true,
  }),
});

file.path.traverse({
  StringLiteral(path) {
    if (path.node.value !== 'hello world') {
      throw buildCodeFrameError(path, 'Must be "hello-world"');
    }
  }
});