From: Victor Stinner <victor.stinner@gmail.com>
Date: Wed, 8 Feb 2017 11:25:00 +0000 (+0100)
Subject: support: add more info on temp_dir() and change_cwd() failure
X-Git-Tag: v3.7.0a1~1393
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=edb48814414bef3a68942434142f90594d21236b;p=python

support: add more info on temp_dir() and change_cwd() failure

Log the OSError exception message.
---

diff --git a/Lib/test/support/__init__.py b/Lib/test/support/__init__.py
index 345e16d754..58e4f92ead 100644
--- a/Lib/test/support/__init__.py
+++ b/Lib/test/support/__init__.py
@@ -954,10 +954,11 @@ def temp_dir(path=None, quiet=False):
         try:
             os.mkdir(path)
             dir_created = True
-        except OSError:
+        except OSError as exc:
             if not quiet:
                 raise
-            warnings.warn('tests may fail, unable to create temp dir: ' + path,
+            warnings.warn(f'tests may fail, unable to create '
+                          f'temporary directory {path}: {exc}',
                           RuntimeWarning, stacklevel=3)
     try:
         yield path
@@ -981,10 +982,11 @@ def change_cwd(path, quiet=False):
     saved_dir = os.getcwd()
     try:
         os.chdir(path)
-    except OSError:
+    except OSError as exc:
         if not quiet:
             raise
-        warnings.warn('tests may fail, unable to change CWD to: ' + path,
+        warnings.warn(f'tests may fail, unable to change current working '
+                      f'directory to {path}: {exc}',
                       RuntimeWarning, stacklevel=3)
     try:
         yield os.getcwd()