bpo-30103: Allow Uuencode in Python using backtick as zero instead of space (#1326)

1 files changed, 24 insertions, 12 deletions

diff --git a/Lib/test/test_binascii.py b/Lib/test/test_binascii.py
index 6b3e437..8fa57cd 100644
--- a/Lib/test/test_binascii.py
+++ b/Lib/test/test_binascii.py
@@ -112,29 +112,41 @@ class BinASCIITest(unittest.TestCase):
 
     def test_uu(self):
         MAX_UU = 45
-        lines = []
-        for i in range(0, len(self.data), MAX_UU):
-            b = self.type2test(self.rawdata[i:i+MAX_UU])
-            a = binascii.b2a_uu(b)
-            lines.append(a)
-        res = bytes()
-        for line in lines:
-            a = self.type2test(line)
-            b = binascii.a2b_uu(a)
-            res += b
-        self.assertEqual(res, self.rawdata)
+        for backtick in (True, False):
+            lines = []
+            for i in range(0, len(self.data), MAX_UU):
+                b = self.type2test(self.rawdata[i:i+MAX_UU])
+                a = binascii.b2a_uu(b, backtick=backtick)
+                lines.append(a)
+            res = bytes()
+            for line in lines:
+                a = self.type2test(line)
+                b = binascii.a2b_uu(a)
+                res += b
+            self.assertEqual(res, self.rawdata)
 
         self.assertEqual(binascii.a2b_uu(b"\x7f"), b"\x00"*31)
         self.assertEqual(binascii.a2b_uu(b"\x80"), b"\x00"*32)
         self.assertEqual(binascii.a2b_uu(b"\xff"), b"\x00"*31)
         self.assertRaises(binascii.Error, binascii.a2b_uu, b"\xff\x00")
         self.assertRaises(binascii.Error, binascii.a2b_uu, b"!!!!")
-
         self.assertRaises(binascii.Error, binascii.b2a_uu, 46*b"!")
 
         # Issue #7701 (crash on a pydebug build)
         self.assertEqual(binascii.b2a_uu(b'x'), b'!>   \n')
 
+        self.assertEqual(binascii.b2a_uu(b''), b' \n')
+        self.assertEqual(binascii.b2a_uu(b'', backtick=True), b'`\n')
+        self.assertEqual(binascii.a2b_uu(b' \n'), b'')
+        self.assertEqual(binascii.a2b_uu(b'`\n'), b'')
+        self.assertEqual(binascii.b2a_uu(b'\x00Cat'), b'$ $-A=   \n')
+        self.assertEqual(binascii.b2a_uu(b'\x00Cat', backtick=True),
+                         b'$`$-A=```\n')
+        self.assertEqual(binascii.a2b_uu(b'$`$-A=```\n'),
+                         binascii.a2b_uu(b'$ $-A=   \n'))
+        with self.assertRaises(TypeError):
+            binascii.b2a_uu(b"", True)
+
     def test_crc_hqx(self):
         crc = binascii.crc_hqx(self.type2test(b"Test the CRC-32 of"), 0)
         crc = binascii.crc_hqx(self.type2test(b" this string."), crc)