"""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_newbuffer_interface(self):
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# Test that the buffer object has the new buffer interface
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# as used by the memoryview object
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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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m = memoryview(b) # Should not raise an exception
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self.assertEqual(m.tobytes(), s)
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def test_main():
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with test_support.check_py3k_warnings(("buffer.. not supported",
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DeprecationWarning)):
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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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