def test_smtp(self):
# Fake
msg = Message(['*****@*****.**'], 'Test')
postman = Postman('*****@*****.**', None) # It's never used anyway
# Cannot use `None` as Connection
self.assertRaises(AttributeError, postman.connect().__enter__)
# Mock and test
with postman.loopback() as lo:
# Send
with postman.connect() as c:
c.sendmail(msg)
# Check
self.assertEqual(len(lo), 1)
self.assertEqual(len(lo), 1) # Still usable
# Now fails again
self.assertRaises(AttributeError, postman.connect().__enter__)
