1 files changed, 17 insertions, 0 deletions
diff --git a/Lib/test/test_datetime.py b/Lib/test/test_datetime.py
index ead4b1c..797800f 100644
--- a/Lib/test/test_datetime.py
+++ b/Lib/test/test_datetime.py
@@ -851,6 +851,23 @@ class TestDate(HarmlessMixedComparison, unittest.TestCase):
         # A naive object replaces %z and %Z w/ empty strings.
         self.assertEqual(t.strftime("'%z' '%Z'"), "'' ''")
 
+        #make sure that invalid format specifiers are handled correctly
+        #self.assertRaises(ValueError, t.strftime, "%e")
+        #self.assertRaises(ValueError, t.strftime, "%")
+        #self.assertRaises(ValueError, t.strftime, "%#")
+
+        #oh well, some systems just ignore those invalid ones.
+        #at least, excercise them to make sure that no crashes
+        #are generated
+        for f in ["%e", "%", "%#"]:
+            try:
+                t.strftime(f)
+            except ValueError:
+                pass
+
+        #check that this standard extension works
+        t.strftime("%f")
+
 
     def test_format(self):
         dt = self.theclass(2007, 9, 10)