1 files changed, 5 insertions, 0 deletions
diff --git a/Lib/test/test_os.py b/Lib/test/test_os.py
index 15ed557..6cabb82 100644
--- a/Lib/test/test_os.py
+++ b/Lib/test/test_os.py
@@ -20,6 +20,11 @@ class FileTests(unittest.TestCase):
         os.close(f)
         self.assert_(os.access(test_support.TESTFN, os.W_OK))
 
+    def test_closerange(self):
+        f = os.open(test_support.TESTFN, os.O_CREAT|os.O_RDWR)
+        # close a fd that is open, and one that isn't
+        os.closerange(f, f+2)
+        self.assertRaises(OSError, os.write, f, "a")
 
 # Test attributes on return values from os.*stat* family.
 class StatAttributeTests(unittest.TestCase):