text: # testing/engines.py
  # Copyright (C) 2005-2019 the SQLAlchemy authors and contributors
  # <see AUTHORS file>
  #
  # This module is part of SQLAlchemy and is released under
  # the MIT License: http://www.opensource.org/licenses/mit-license.php
  r"""
  .. dialect:: postgresql+psycopg2cffi
      :name: psycopg2cffi
      :dbapi: psycopg2cffi
      :connectstring: postgresql+psycopg2cffi://user:password@host:port/dbname[?key=value&key=value...]
      :url: http://pypi.python.org/pypi/psycopg2cffi/
  
  ``psycopg2cffi`` is an adaptation of ``psycopg2``, using CFFI for the C
  layer. This makes it suitable for use in e.g. PyPy. Documentation
  is as per ``psycopg2``.
  
  .. versionadded:: 1.0.0
  
  .. seealso::
  
      :mod:`sqlalchemy.dialects.postgresql.psycopg2`
  
  """  # noqa
  from .psycopg2 import PGDialect_psycopg2
  
  
  class PGDialect_psycopg2cffi(PGDialect_psycopg2):
      driver = "psycopg2cffi"
      supports_unicode_statements = True
  
      # psycopg2cffi's first release is 2.5.0, but reports
      # __version__ as 2.4.4.  Subsequent releases seem to have
      # fixed this.
  
      FEATURE_VERSION_MAP = dict(
          native_json=(2, 4, 4),
          native_jsonb=(2, 7, 1),
          sane_multi_rowcount=(2, 4, 4),
          array_oid=(2, 4, 4),
          hstore_adapter=(2, 4, 4),
      )
  
      @classmethod
      def dbapi(cls):
          return __import__("psycopg2cffi")
  
      @classmethod
      def _psycopg2_extensions(cls):
          root = __import__("psycopg2cffi", fromlist=["extensions"])
          return root.extensions
  
      @classmethod
      def _psycopg2_extras(cls):
          root = __import__("psycopg2cffi", fromlist=["extras"])
          return root.extras
  
  
  dialect = PGDialect_psycopg2cffi
  