def test_extrasRequiresHttp2Deps(self):
        """
        L{_EXTRAS_REQUIRE}'s C{http2} extra contains setuptools requirements
        for the packages required to make Twisted HTTP/2 support work.
        """
        deps = _EXTRAS_REQUIRE['http2']
        self.assertIn('h2 >= 3.0, < 4.0', deps)
        self.assertIn('priority >= 1.1.0, < 2.0', deps)

        L{_EXTRAS_REQUIRE}'s C{http2} extra contains setuptools requirements
        for the packages required to make Twisted HTTP/2 support work.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/python/test/test_setup.py