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-rw-r--r--Lib/test/test_email/test_email.py12
1 files changed, 11 insertions, 1 deletions
diff --git a/Lib/test/test_email/test_email.py b/Lib/test/test_email/test_email.py
index 31fd83a..d1e234d 100644
--- a/Lib/test/test_email/test_email.py
+++ b/Lib/test/test_email/test_email.py
@@ -3529,7 +3529,7 @@ Here's the message body
self.assertTrue(msg.get_payload(0).get_payload().endswith('\r\n'))
-class Test8BitBytesHandling(unittest.TestCase):
+class Test8BitBytesHandling(TestEmailBase):
# In Python3 all input is string, but that doesn't work if the actual input
# uses an 8bit transfer encoding. To hack around that, in email 5.1 we
# decode byte streams using the surrogateescape error handler, and
@@ -3782,6 +3782,16 @@ class Test8BitBytesHandling(unittest.TestCase):
email.generator.Generator(out).flatten(msg)
self.assertEqual(out.getvalue(), self.non_latin_bin_msg_as7bit_wrapped)
+ def test_str_generator_should_not_mutate_msg_when_handling_8bit(self):
+ msg = email.message_from_bytes(self.non_latin_bin_msg)
+ out = BytesIO()
+ BytesGenerator(out).flatten(msg)
+ orig_value = out.getvalue()
+ Generator(StringIO()).flatten(msg) # Should not mutate msg!
+ out = BytesIO()
+ BytesGenerator(out).flatten(msg)
+ self.assertEqual(out.getvalue(), orig_value)
+
def test_bytes_generator_with_unix_from(self):
# The unixfrom contains a current date, so we can't check it
# literally. Just make sure the first word is 'From' and the