From: Nick Coghlan <ncoghlan@gmail.com>
Date: Wed, 5 Feb 2014 13:54:55 +0000 (+1000)
Subject: Issue #20053: new test to check an assumption
X-Git-Tag: v3.4.0rc1~82
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=456ab5d90941962973bed0cf2a3ec0e1c32b046b;p=python

Issue #20053: new test to check an assumption
---

diff --git a/Lib/test/test_venv.py b/Lib/test/test_venv.py
index 6ddbacefad..58551bed95 100644
--- a/Lib/test/test_venv.py
+++ b/Lib/test/test_venv.py
@@ -288,6 +288,13 @@ class EnsurePipTest(BaseTest):
         self.run_with_capture(venv.create, self.env_dir, with_pip=False)
         self.assert_pip_not_installed()
 
+    def test_devnull_exists_and_is_empty(self):
+        # Fix for issue #20053 uses os.devnull to force a config file to
+        # appear empty. Make sure that assumption is valid cross platform.
+        self.assertTrue(os.path.exists, os.devnull)
+        with open(os.devnull, "rb") as f:
+            self.assertEqual(f.read(), b"")
+
     # Requesting pip fails without SSL (http://bugs.python.org/issue19744)
     @unittest.skipIf(ssl is None, ensurepip._MISSING_SSL_MESSAGE)
     def test_with_pip(self):