1 """Unit tests for buffer objects.

     2 

     3 For now, tests just new or changed functionality.

     4 

     5 """

     6 

     7 import unittest

     8 from test import test_support

     9 

    10 class BufferTests(unittest.TestCase):

    11 

    12     def test_extended_getslice(self):

    13         # Test extended slicing by comparing with list slicing.

    14         s = "".join(chr(c) for c in list(range(255, -1, -1)))

    15         b = buffer(s)

    16         indices = (0, None, 1, 3, 19, 300, -1, -2, -31, -300)

    17         for start in indices:

    18             for stop in indices:

    19                 # Skip step 0 (invalid)

    20                 for step in indices[1:]:

    21                     self.assertEqual(b[start:stop:step],

    22                                      s[start:stop:step])

    23 

    24 

    25 def test_main():

    26     test_support.run_unittest(BufferTests)

    27 

    28 if __name__ == "__main__":

    29     test_main()