Lib/test/test_buffer.py

   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()