new_contents: from unittest.case import skipIf, skip
  
  from clang.cindex import Index, LibclangError
  
  
  def skip_if_no_clang():
      """
      Decorate your test with this to skip it if clang isn't present.
      """
      try:
          Index.create()
          return skipIf(False, '')
      except LibclangError as error:
          return skip(str(error))
  
subject: Add skip_if_no_clang