def test_extrasRequiresConchDeps(self):
        """
        L{_EXTRAS_REQUIRE}'s C{conch} extra contains setuptools requirements
        for the packages required to make Twisted Conch's secure shell server
        work.
        """
        deps = _EXTRAS_REQUIRE['conch']
        self.assertIn('pyasn1', deps)
        self.assertIn('cryptography >= 2.5', deps)
        self.assertIn('appdirs >= 1.4.0', deps)

        L{_EXTRAS_REQUIRE}'s C{conch} extra contains setuptools requirements
        for the packages required to make Twisted Conch's secure shell server
        work.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/python/test/test_setup.py