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)