From 9adc1a38bda536e6f02fb5b3b1bbd231160a50de Mon Sep 17 00:00:00 2001
From: Berker Peksag <berker.peksag@gmail.com>
Date: Sat, 23 Jul 2016 07:31:47 +0300
Subject: [PATCH] Issue #13849: Add tests for null byte checking in
 test_genericpath

---
 Lib/test/test_genericpath.py | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/Lib/test/test_genericpath.py b/Lib/test/test_genericpath.py
index 86fc2de7530..d7644e8ef45 100644
--- a/Lib/test/test_genericpath.py
+++ b/Lib/test/test_genericpath.py
@@ -274,6 +274,15 @@ class TestGenericTest(GenericTest, unittest.TestCase):
     # and is only meant to be inherited by others.
     pathmodule = genericpath
 
+    def test_null_bytes(self):
+        for attr in GenericTest.common_attributes:
+            # os.path.commonprefix doesn't raise ValueError
+            if attr == 'commonprefix':
+                continue
+            with self.subTest(attr=attr):
+                with self.assertRaises(ValueError) as cm:
+                    getattr(self.pathmodule, attr)('/tmp\x00abcds')
+                self.assertEqual(str(cm.exception), 'embedded null byte')
 
 # Following TestCase is not supposed to be run from test_genericpath.
 # It is inherited by other test modules (macpath, ntpath, posixpath).