def test_basicSecurityOptionsAreSet(self):
        """
        Every context must have C{OP_NO_SSLv2}, C{OP_NO_COMPRESSION}, and
        C{OP_CIPHER_SERVER_PREFERENCE} set.
        """
        opts = sslverify.OpenSSLCertificateOptions(
            privateKey=self.sKey,
            certificate=self.sCert,
        )
        opts._contextFactory = FakeContext
        ctx = opts.getContext()
        options = (SSL.OP_NO_SSLv2 | SSL.OP_NO_COMPRESSION |
                   SSL.OP_CIPHER_SERVER_PREFERENCE)
        self.assertEqual(options, ctx._options & options)

        Every context must have C{OP_NO_SSLv2}, C{OP_NO_COMPRESSION}, and
        C{OP_CIPHER_SERVER_PREFERENCE} set.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/test/test_sslverify.py