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# Copyright (c) Twisted Matrix Laboratories.
# See LICENSE for details.
import email.message
import email.parser
from io import BytesIO, StringIO
from twisted.mail import bounce
from twisted.trial import unittest
class BounceTests(unittest.TestCase):
"""
Bounce message generation
"""
def test_bounceMessageUnicode(self):
"""
L{twisted.mail.bounce.generateBounce} can accept L{unicode}.
"""
fromAddress, to, s = bounce.generateBounce(
StringIO(
"""\
From: Moshe Zadka <[email protected]>
To: [email protected]
Subject: test
"""
),
"[email protected]",
"[email protected]",
)
self.assertEqual(fromAddress, b"")
self.assertEqual(to, b"[email protected]")
emailParser = email.parser.Parser()
mess = emailParser.parse(StringIO(s.decode("utf-8")))
self.assertEqual(mess["To"], "[email protected]")
self.assertEqual(mess["From"], "[email protected]")
self.assertEqual(mess["subject"], "Returned Mail: see transcript for details")
def test_bounceMessageBytes(self):
"""
L{twisted.mail.bounce.generateBounce} can accept L{bytes}.
"""
fromAddress, to, s = bounce.generateBounce(
BytesIO(
b"""\
From: Moshe Zadka <[email protected]>
To: [email protected]
Subject: test
"""
),
b"[email protected]",
b"[email protected]",
)
self.assertEqual(fromAddress, b"")
self.assertEqual(to, b"[email protected]")
emailParser = email.parser.Parser()
mess = emailParser.parse(StringIO(s.decode("utf-8")))
self.assertEqual(mess["To"], "[email protected]")
self.assertEqual(mess["From"], "[email protected]")
self.assertEqual(mess["subject"], "Returned Mail: see transcript for details")
def test_bounceMessageCustomTranscript(self):
"""
Pass a custom transcript message to L{twisted.mail.bounce.generateBounce}.
"""
fromAddress, to, s = bounce.generateBounce(
BytesIO(
b"""\
From: Moshe Zadka <[email protected]>
To: [email protected]
Subject: test
"""
),
b"[email protected]",
b"[email protected]",
"Custom transcript",
)
self.assertEqual(fromAddress, b"")
self.assertEqual(to, b"[email protected]")
emailParser = email.parser.Parser()
mess = emailParser.parse(StringIO(s.decode("utf-8")))
self.assertEqual(mess["To"], "[email protected]")
self.assertEqual(mess["From"], "[email protected]")
self.assertEqual(mess["subject"], "Returned Mail: see transcript for details")
self.assertTrue(mess.is_multipart())
parts = mess.get_payload()
self.assertEqual(parts[0].get_payload(), "Custom transcript\n")
def _bounceBigMessage(self, header, message, ioType):
"""
Pass a really big message to L{twisted.mail.bounce.generateBounce}.
"""
fromAddress, to, s = bounce.generateBounce(
ioType(header + message), "[email protected]", "[email protected]"
)
emailParser = email.parser.Parser()
mess = emailParser.parse(StringIO(s.decode("utf-8")))
self.assertEqual(mess["To"], "[email protected]")
self.assertEqual(mess["From"], "[email protected]")
self.assertEqual(mess["subject"], "Returned Mail: see transcript for details")
self.assertTrue(mess.is_multipart())
parts = mess.get_payload()
innerMessage = parts[1].get_payload()
if isinstance(message, bytes):
message = message.decode("utf-8")
self.assertEqual(innerMessage[0].get_payload() + "\n", message)
def test_bounceBigMessage(self):
"""
L{twisted.mail.bounce.generateBounce} with big L{unicode} and
L{bytes} messages.
"""
header = b"""\
From: Moshe Zadka <[email protected]>
To: [email protected]
Subject: test
"""
self._bounceBigMessage(header, b"Test test\n" * 10000, BytesIO)
self._bounceBigMessage(header.decode("utf-8"), "More test\n" * 10000, StringIO)