Merged revisions 72167 via svnmerge from

svn+ssh://pythondev@svn.python.org/python/trunk

........
  r72167 | walter.doerwald | 2009-05-01 19:35:37 +0200 (Fr, 01 Mai 2009) | 5 lines

  Make test.test_support.EnvironmentVarGuard behave like a dictionary.

  All changes are mirrored to the underlying os.environ dict, but rolled back
  on exit from the with block.
........

1 files changed, 5 insertions, 9 deletions

diff --git a/Lib/test/test_ntpath.py b/Lib/test/test_ntpath.py
index 3dc7765..2b2b7d5 100644
--- a/Lib/test/test_ntpath.py
+++ b/Lib/test/test_ntpath.py
@@ -141,12 +141,11 @@ class TestNtpath(unittest.TestCase):
         tester("ntpath.normpath('//machine/share//a/b')", r'\\machine\share\a\b')
 
     def test_expandvars(self):
-        oldenv = os.environ.copy()
-        try:
-            os.environ.clear()
-            os.environ["foo"] = "bar"
-            os.environ["{foo"] = "baz1"
-            os.environ["{foo}"] = "baz2"
+        with support.EnvironmentVarGuard() as env:
+            env.clear()
+            env["foo"] = "bar"
+            env["{foo"] = "baz1"
+            env["{foo}"] = "baz2"
             tester('ntpath.expandvars("foo")', "foo")
             tester('ntpath.expandvars("$foo bar")', "bar bar")
             tester('ntpath.expandvars("${foo}bar")', "barbar")
@@ -166,9 +165,6 @@ class TestNtpath(unittest.TestCase):
             tester('ntpath.expandvars("%?bar%")', "%?bar%")
             tester('ntpath.expandvars("%foo%%bar")', "bar%bar")
             tester('ntpath.expandvars("\'%foo%\'%bar")', "\'%foo%\'%bar")
-        finally:
-            os.environ.clear()
-            os.environ.update(oldenv)
 
     def test_abspath(self):
         # ntpath.abspath() can only be used on a system with the "nt" module