1 files changed, 12 insertions, 0 deletions
diff --git a/Lib/test/test_buffer.py b/Lib/test/test_buffer.py
index eb6e9ea..834c05b 100644
--- a/Lib/test/test_buffer.py
+++ b/Lib/test/test_buffer.py
@@ -37,6 +37,18 @@ class BufferTests(unittest.TestCase):
         self.failIf(a == b)
         self.assertRaises(TypeError, lambda: a < b)
 
+    def test_extended_getslice(self):
+        # Test extended slicing by comparing with list slicing.
+        s = bytes(range(255, -1, -1))
+        b = buffer(s)
+        indices = (0, None, 1, 3, 19, 300, -1, -2, -31, -300)
+        for start in indices:
+            for stop in indices:
+                # Skip step 0 (invalid)
+                for step in indices[1:]:
+                    self.assertEqual(b[start:stop:step],
+                                     s[start:stop:step])
+
 def test_main():
     test_support.run_unittest(BufferTests)