test_nntplib.py 文件源码

def test_starttls(self):
            file = self.server.file
            sock = self.server.sock
            try:
                self.server.starttls()
            except nntplib.NNTPPermanentError:
                self.skipTest("STARTTLS not supported by server.")
            else:
                # Check that the socket and internal pseudo-file really were
                # changed.
                self.assertNotEqual(file, self.server.file)
                self.assertNotEqual(sock, self.server.sock)
                # Check that the new socket really is an SSL one
                self.assertIsInstance(self.server.sock, ssl.SSLSocket)
                # Check that trying starttls when it's already active fails.
                self.assertRaises(ValueError, self.server.starttls)