Add Python version since deprecation in base64 methods. (#33) (#430)

Allow developers to not have to either test on N Python versions or
looked through multiple versions of the docs to know whether they can
easily update.

(cherry picked from commit c643a967dd7d33ccefa5b61b38caf40b448057ce)

1 files changed, 8 insertions, 0 deletions

diff --git a/Lib/test/test_base64.py b/Lib/test/test_base64.py
index 4f86aaa..4754739 100644
--- a/Lib/test/test_base64.py
+++ b/Lib/test/test_base64.py
@@ -18,6 +18,14 @@ class LegacyBase64TestCase(unittest.TestCase):
         int_data = memoryview(b"1234").cast('I')
         self.assertRaises(TypeError, f, int_data)
 
+    def test_encodestring_warns(self):
+        with self.assertWarns(DeprecationWarning):
+            base64.encodestring(b"www.python.org")
+
+    def test_decodestring_warns(self):
+        with self.assertWarns(DeprecationWarning):
+            base64.decodestring(b"d3d3LnB5dGhvbi5vcmc=\n")
+
     def test_encodebytes(self):
         eq = self.assertEqual
         eq(base64.encodebytes(b"www.python.org"), b"d3d3LnB5dGhvbi5vcmc=\n")