Fixed #27333 -- Prevented BASE64 encoding in message.as_string() on Python 3

Thanks Tim Graham for the review.

1 files changed, 4 insertions, 0 deletions

diff --git a/tests/mail/tests.py b/tests/mail/tests.py
index bc0d8eabc9..662cd7c6d6 100644
--- a/tests/mail/tests.py
+++ b/tests/mail/tests.py
@@ -572,6 +572,8 @@ class MailTests(HeadersCheckMixin, SimpleTestCase):
         )
         s = msg.message().as_bytes()
         self.assertIn(b'Content-Transfer-Encoding: 8bit', s)
+        s = msg.message().as_string()
+        self.assertIn(str('Content-Transfer-Encoding: 8bit'), s)
 
         msg = EmailMessage(
             'Subject', 'Body with non latin characters: А Б В Г Д Е Ж Ѕ З И І К Л М Н О П.', 'bounce@example.com',
@@ -579,6 +581,8 @@ class MailTests(HeadersCheckMixin, SimpleTestCase):
         )
         s = msg.message().as_bytes()
         self.assertIn(b'Content-Transfer-Encoding: 8bit', s)
+        s = msg.message().as_string()
+        self.assertIn(str('Content-Transfer-Encoding: 8bit'), s)
 
     def test_dont_base64_encode_message_rfc822(self):
         # Ticket #18967