1 files changed, 187 insertions, 0 deletions
diff --git a/Lib/test/test_email/test__encoded_words.py b/Lib/test/test_email/test__encoded_words.py
new file mode 100644
index 00000000000..14395fed40d
--- /dev/null
+++ b/Lib/test/test_email/test__encoded_words.py
@@ -0,0 +1,187 @@
+import unittest
+from email import _encoded_words as _ew
+from email import errors
+from test.test_email import TestEmailBase
+
+
+class TestDecodeQ(TestEmailBase):
+
+    def _test(self, source, ex_result, ex_defects=[]):
+        result, defects = _ew.decode_q(source)
+        self.assertEqual(result, ex_result)
+        self.assertDefectsEqual(defects, ex_defects)
+
+    def test_no_encoded(self):
+        self._test(b'foobar', b'foobar')
+
+    def test_spaces(self):
+        self._test(b'foo=20bar=20', b'foo bar ')
+        self._test(b'foo_bar_', b'foo bar ')
+
+    def test_run_of_encoded(self):
+        self._test(b'foo=20=20=21=2Cbar', b'foo  !,bar')
+
+
+class TestDecodeB(TestEmailBase):
+
+    def _test(self, source, ex_result, ex_defects=[]):
+        result, defects = _ew.decode_b(source)
+        self.assertEqual(result, ex_result)
+        self.assertDefectsEqual(defects, ex_defects)
+
+    def test_simple(self):
+        self._test(b'Zm9v', b'foo')
+
+    def test_missing_padding(self):
+        self._test(b'dmk', b'vi', [errors.InvalidBase64PaddingDefect])
+
+    def test_invalid_character(self):
+        self._test(b'dm\x01k===', b'vi', [errors.InvalidBase64CharactersDefect])
+
+    def test_invalid_character_and_bad_padding(self):
+        self._test(b'dm\x01k', b'vi', [errors.InvalidBase64CharactersDefect,
+                                       errors.InvalidBase64PaddingDefect])
+
+
+class TestDecode(TestEmailBase):
+
+    def test_wrong_format_input_raises(self):
+        with self.assertRaises(ValueError):
+            _ew.decode('=?badone?=')
+        with self.assertRaises(ValueError):
+            _ew.decode('=?')
+        with self.assertRaises(ValueError):
+            _ew.decode('')
+
+    def _test(self, source, result, charset='us-ascii', lang='', defects=[]):
+        res, char, l, d = _ew.decode(source)
+        self.assertEqual(res, result)
+        self.assertEqual(char, charset)
+        self.assertEqual(l, lang)
+        self.assertDefectsEqual(d, defects)
+
+    def test_simple_q(self):
+        self._test('=?us-ascii?q?foo?=', 'foo')
+
+    def test_simple_b(self):
+        self._test('=?us-ascii?b?dmk=?=', 'vi')
+
+    def test_q_case_ignored(self):
+        self._test('=?us-ascii?Q?foo?=', 'foo')
+
+    def test_b_case_ignored(self):
+        self._test('=?us-ascii?B?dmk=?=', 'vi')
+
+    def test_non_trivial_q(self):
+        self._test('=?latin-1?q?=20F=fcr=20Elise=20?=', ' Für Elise ', 'latin-1')
+
+    def test_q_escpaed_bytes_preserved(self):
+        self._test(b'=?us-ascii?q?=20\xACfoo?='.decode('us-ascii',
+                                                       'surrogateescape'),
+                   ' \uDCACfoo',
+                   defects = [errors.UndecodableBytesDefect])
+
+    def test_b_undecodable_bytes_ignored_with_defect(self):
+        self._test(b'=?us-ascii?b?dm\xACk?='.decode('us-ascii',
+                                                   'surrogateescape'),
+                   'vi',
+                   defects = [
+                    errors.InvalidBase64CharactersDefect,
+                    errors.InvalidBase64PaddingDefect])
+
+    def test_b_invalid_bytes_ignored_with_defect(self):
+        self._test('=?us-ascii?b?dm\x01k===?=',
+                   'vi',
+                   defects = [errors.InvalidBase64CharactersDefect])
+
+    def test_b_invalid_bytes_incorrect_padding(self):
+        self._test('=?us-ascii?b?dm\x01k?=',
+                   'vi',
+                   defects = [
+                    errors.InvalidBase64CharactersDefect,
+                    errors.InvalidBase64PaddingDefect])
+
+    def test_b_padding_defect(self):
+        self._test('=?us-ascii?b?dmk?=',
+                   'vi',
+                    defects = [errors.InvalidBase64PaddingDefect])
+
+    def test_nonnull_lang(self):
+        self._test('=?us-ascii*jive?q?test?=', 'test', lang='jive')
+
+    def test_unknown_8bit_charset(self):
+        self._test('=?unknown-8bit?q?foo=ACbar?=',
+                   b'foo\xacbar'.decode('ascii', 'surrogateescape'),
+                   charset = 'unknown-8bit',
+                   defects = [])
+
+    def test_unknown_charset(self):
+        self._test('=?foobar?q?foo=ACbar?=',
+                   b'foo\xacbar'.decode('ascii', 'surrogateescape'),
+                   charset = 'foobar',
+                   # XXX Should this be a new Defect instead?
+                   defects = [errors.CharsetError])
+
+
+class TestEncodeQ(TestEmailBase):
+
+    def _test(self, src, expected):
+        self.assertEqual(_ew.encode_q(src), expected)
+
+    def test_all_safe(self):
+        self._test(b'foobar', 'foobar')
+
+    def test_spaces(self):
+        self._test(b'foo bar ', 'foo_bar_')
+
+    def test_run_of_encodables(self):
+        self._test(b'foo  ,,bar', 'foo__=2C=2Cbar')
+
+
+class TestEncodeB(TestEmailBase):
+
+    def test_simple(self):
+        self.assertEqual(_ew.encode_b(b'foo'), 'Zm9v')
+
+    def test_padding(self):
+        self.assertEqual(_ew.encode_b(b'vi'), 'dmk=')
+
+
+class TestEncode(TestEmailBase):
+
+    def test_q(self):
+        self.assertEqual(_ew.encode('foo', 'utf-8', 'q'), '=?utf-8?q?foo?=')
+
+    def test_b(self):
+        self.assertEqual(_ew.encode('foo', 'utf-8', 'b'), '=?utf-8?b?Zm9v?=')
+
+    def test_auto_q(self):
+        self.assertEqual(_ew.encode('foo', 'utf-8'), '=?utf-8?q?foo?=')
+
+    def test_auto_q_if_short_mostly_safe(self):
+        self.assertEqual(_ew.encode('vi.', 'utf-8'), '=?utf-8?q?vi=2E?=')
+
+    def test_auto_b_if_enough_unsafe(self):
+        self.assertEqual(_ew.encode('.....', 'utf-8'), '=?utf-8?b?Li4uLi4=?=')
+
+    def test_auto_b_if_long_unsafe(self):
+        self.assertEqual(_ew.encode('vi.vi.vi.vi.vi.', 'utf-8'),
+                         '=?utf-8?b?dmkudmkudmkudmkudmku?=')
+
+    def test_auto_q_if_long_mostly_safe(self):
+        self.assertEqual(_ew.encode('vi vi vi.vi ', 'utf-8'),
+                         '=?utf-8?q?vi_vi_vi=2Evi_?=')
+
+    def test_utf8_default(self):
+        self.assertEqual(_ew.encode('foo'), '=?utf-8?q?foo?=')
+
+    def test_lang(self):
+        self.assertEqual(_ew.encode('foo', lang='jive'), '=?utf-8*jive?q?foo?=')
+
+    def test_unknown_8bit(self):
+        self.assertEqual(_ew.encode('foo\uDCACbar', charset='unknown-8bit'),
+                         '=?unknown-8bit?q?foo=ACbar?=')
+
+
+if __name__ == '__main__':
+    unittest.main()