Fix UnicecodeDecodeError parsing email

tests/parser_tests.py

@@ -3,6 +3,7 @@ from __future__ import unicode_literals
 import unittest
 from imbox.parser import *
 
+import os
 import sys
 if sys.version_info.major < 3 or sys.version_info.minor < 3:
     SMTP = False
@@ -10,6 +11,9 @@ else:
     from email.policy import SMTP
 
 
+TEST_DIR = os.path.dirname(os.path.abspath(__file__))
+
+
 raw_email = """Delivered-To: johndoe@gmail.com
 X-Originating-Email: [martin@amon.cx]
 Message-ID: <test0@example.com>
@@ -98,6 +102,10 @@ class TestParser(unittest.TestCase):
         self.assertEqual('Выписка по карте', parsed_email.subject)
         self.assertEqual('Выписка по карте 1234', parsed_email.body['html'][0])
 
+    def test_parse_email_invalid_unicode(self):
+        parsed_email = parse_email(open(os.path.join(TEST_DIR, '8422.msg'), 'rb').read())
+        self.assertEqual("Following up Re: Looking to connect, let's schedule a call!", parsed_email.subject)
+
     def test_parse_email_ignores_header_casing(self):
         self.assertEqual('one', parse_email('Message-ID: one').message_id)
         self.assertEqual('one', parse_email('Message-Id: one').message_id)