old_contents: """APIs for chef"""
  
  import coloredlogs
  
  from . model.chef import Chef
  from . model.ingredient import ingredient_from_dict
  
  
  coloredlogs.install(level=None, fmt='%(asctime)s %(levelname)s %(message)s')
  
  
  def run_recipe(fn, ddf_dir, out_dir):
      """run the recipe file and serve result"""
      from ddf_utils.io import cleanup
      import os
      if os.path.exists(out_dir):
          cleanup(out_dir)
      else:
          os.mkdir(out_dir)
  
      chef = Chef.from_recipe(fn)
      if ddf_dir is not None:
          chef.add_config(ddf_dir=ddf_dir)
      chef.run(serve=True, outpath=out_dir)
      return
  
new_contents: """APIs for chef"""
  
  import coloredlogs
  
  from . model.chef import Chef
  from . model.ingredient import ingredient_from_dict
  
  
  coloredlogs.install(level=None, fmt='%(asctime)s %(levelname)s %(message)s')
  
  
  def run_recipe(fn, ddf_dir, out_dir):
      """run the recipe file and serve result"""
      from ddf_utils.io import cleanup
      import os
      if os.path.exists(out_dir):
          cleanup(out_dir)
      else:
          os.mkdir(out_dir)
  
      chef = Chef.from_recipe(fn, ddf_dir=ddf_dir)
      chef.run(serve=True, outpath=out_dir)
      return
  
subject: fix test case