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3ccec68a05
- Specialcase extended slices that amount to a shallow copy the same way as is done for simple slices, in the tuple, string and unicode case. - Specialcase step-1 extended slices to optimize the common case for all involved types. - For lists, allow extended slice assignment of differing lengths as long as the step is 1. (Previously, 'l[:2:1] = []' failed even though 'l[:2] = []' and 'l[:2:None] = []' do not.) - Implement extended slicing for buffer, array, structseq, mmap and UserString.UserString. - Implement slice-object support (but not non-step-1 slice assignment) for UserString.MutableString. - Add tests for all new functionality.
29 lines
789 B
Python
29 lines
789 B
Python
"""Unit tests for buffer objects.
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For now, tests just new or changed functionality.
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"""
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import unittest
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from test import test_support
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class BufferTests(unittest.TestCase):
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def test_extended_getslice(self):
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# Test extended slicing by comparing with list slicing.
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s = "".join(chr(c) for c in list(range(255, -1, -1)))
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b = buffer(s)
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indices = (0, None, 1, 3, 19, 300, -1, -2, -31, -300)
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for start in indices:
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for stop in indices:
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# Skip step 0 (invalid)
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for step in indices[1:]:
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self.assertEqual(b[start:stop:step],
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s[start:stop:step])
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def test_main():
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test_support.run_unittest(BufferTests)
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if __name__ == "__main__":
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test_main()
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