text: const fs = require('fs');
  const path = require('path');
  
  const distJS = fs.readFileSync(path.join(__dirname, 'build', '_dist_', 'index.js'), 'utf-8');
  
  describe('config: installOptions.externalPackage', () => {
    it('preserves external package', () => {
      expect(distJS).toEqual(expect.stringContaining(`import 'fs';`));
    });
  });
  