From dedc5a60d1f270bc8e95202b487dfe77b80a9f5e Mon Sep 17 00:00:00 2001
From: Zackery Spytz <zspytz@gmail.com>
Date: Mon, 17 Aug 2020 18:19:09 -0600
Subject: [PATCH] bpo-30493: Increase base64 test coverage

Ensure the character y is disallowed within a 5-tuple when
foldspaces is True.

Co-Authored-By: Lee Cannon <leecannon@leecannon.xyz>
---
 Lib/test/test_base64.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Lib/test/test_base64.py b/Lib/test/test_base64.py
index 4f62c4115f60aa1..1c0f148e3e74645 100644
--- a/Lib/test/test_base64.py
+++ b/Lib/test/test_base64.py
@@ -582,6 +582,7 @@ def test_a85decode(self):
         eq(base64.a85decode(b'y+<Vd', foldspaces=True, adobe=False), b' '*7)
         eq(base64.a85decode(b'y+<U', foldspaces=True, adobe=False), b' '*6)
         eq(base64.a85decode(b'y+9', foldspaces=True, adobe=False), b' '*5)
+        eq(base64.a85decode(b'aaaaay', foldspaces=True), b'\xc9\x80\x0b@    ')
 
         self.check_other_types(base64.a85decode, b'GB\\6`E-ZP=Df.1GEb>',
                                b"www.python.org")
@@ -685,6 +686,8 @@ def test_a85decode_errors(self):
         self.assertRaises(ValueError, base64.a85decode, b's8W', adobe=False)
         self.assertRaises(ValueError, base64.a85decode, b's8W-', adobe=False)
         self.assertRaises(ValueError, base64.a85decode, b's8W-"', adobe=False)
+        self.assertRaises(ValueError, base64.a85decode, b'aaaay',
+                          foldspaces=True)
 
     def test_b85decode_errors(self):
         illegal = list(range(33)) + \