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import io
import email
import unittest
from email.message import Message, EmailMessage
from email.policy import default
from test.test_email import TestEmailBase
class TestCustomMessage(TestEmailBase):
class MyMessage(Message):
def __init__(self, policy):
self.check_policy = policy
super().__init__()
MyPolicy = TestEmailBase.policy.clone(linesep='boo')
def test_custom_message_gets_policy_if_possible_from_string(self):
msg = email.message_from_string("Subject: bogus\n\nmsg\n",
self.MyMessage,
policy=self.MyPolicy)
self.assertIsInstance(msg, self.MyMessage)
self.assertIs(msg.check_policy, self.MyPolicy)
def test_custom_message_gets_policy_if_possible_from_file(self):
source_file = io.StringIO("Subject: bogus\n\nmsg\n")
msg = email.message_from_file(source_file,
self.MyMessage,
policy=self.MyPolicy)
self.assertIsInstance(msg, self.MyMessage)
self.assertIs(msg.check_policy, self.MyPolicy)
# XXX add tests for other functions that take Message arg.
class TestParserBase:
def test_only_split_on_cr_lf(self):
# The unicode line splitter splits on unicode linebreaks, which are
# more numerous than allowed by the email RFCs; make sure we are only
# splitting on those two.
for parser in self.parsers:
with self.subTest(parser=parser.__name__):
msg = parser(
"Next-Line: not\x85broken\r\n"
"Null: not\x00broken\r\n"
"Vertical-Tab: not\vbroken\r\n"
"Form-Feed: not\fbroken\r\n"
"File-Separator: not\x1Cbroken\r\n"
"Group-Separator: not\x1Dbroken\r\n"
"Record-Separator: not\x1Ebroken\r\n"
"Line-Separator: not\u2028broken\r\n"
"Paragraph-Separator: not\u2029broken\r\n"
"\r\n",
policy=default,
)
self.assertEqual(msg.items(), [
("Next-Line", "not\x85broken"),
("Null", "not\x00broken"),
("Vertical-Tab", "not\vbroken"),
("Form-Feed", "not\fbroken"),
("File-Separator", "not\x1Cbroken"),
("Group-Separator", "not\x1Dbroken"),
("Record-Separator", "not\x1Ebroken"),
("Line-Separator", "not\u2028broken"),
("Paragraph-Separator", "not\u2029broken"),
])
self.assertEqual(msg.get_payload(), "")
class MyMessage(EmailMessage):
pass
def test_custom_message_factory_on_policy(self):
for parser in self.parsers:
with self.subTest(parser=parser.__name__):
MyPolicy = default.clone(message_factory=self.MyMessage)
msg = parser("To: foo\n\ntest", policy=MyPolicy)
self.assertIsInstance(msg, self.MyMessage)
def test_factory_arg_overrides_policy(self):
for parser in self.parsers:
with self.subTest(parser=parser.__name__):
MyPolicy = default.clone(message_factory=self.MyMessage)
msg = parser("To: foo\n\ntest", Message, policy=MyPolicy)
self.assertNotIsInstance(msg, self.MyMessage)
self.assertIsInstance(msg, Message)
# Play some games to get nice output in subTest. This code could be clearer
# if staticmethod supported __name__.
def message_from_file(s, *args, **kw):
f = io.StringIO(s)
return email.message_from_file(f, *args, **kw)
class TestParser(TestParserBase, TestEmailBase):
parsers = (email.message_from_string, message_from_file)
def message_from_bytes(s, *args, **kw):
return email.message_from_bytes(s.encode(), *args, **kw)
def message_from_binary_file(s, *args, **kw):
f = io.BytesIO(s.encode())
return email.message_from_binary_file(f, *args, **kw)
class TestBytesParser(TestParserBase, TestEmailBase):
parsers = (message_from_bytes, message_from_binary_file)
if __name__ == '__main__':
unittest.main()
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