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Viewing changes to Lib/ctypes/test/test_incomplete.py

  • Committer: Bazaar Package Importer
  • Author(s): Matthias Klose
  • Date: 2009-02-13 12:51:00 UTC
  • Revision ID: james.westby@ubuntu.com-20090213125100-uufgcb9yeqzujpqw
Tags: upstream-2.6.1
Import upstream version 2.6.1

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Lib/ctypes/test/test_incomplete.py
 
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import unittest
 
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from ctypes import *
 
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################################################################
 
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#
 
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# The incomplete pointer example from the tutorial
 
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#
 
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class MyTestCase(unittest.TestCase):
 
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    def test_incomplete_example(self):
 
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        lpcell = POINTER("cell")
 
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        class cell(Structure):
 
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            _fields_ = [("name", c_char_p),
 
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                        ("next", lpcell)]
 
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        SetPointerType(lpcell, cell)
 
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        c1 = cell()
 
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        c1.name = "foo"
 
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        c2 = cell()
 
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        c2.name = "bar"
 
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        c1.next = pointer(c2)
 
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        c2.next = pointer(c1)
 
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        p = c1
 
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        result = []
 
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        for i in range(8):
 
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            result.append(p.name)
 
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            p = p.next[0]
 
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        self.failUnlessEqual(result, ["foo", "bar"] * 4)
 
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        # to not leak references, we must clean _pointer_type_cache
 
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        from ctypes import _pointer_type_cache
 
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        del _pointer_type_cache[cell]
 
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################################################################
 
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if __name__ == '__main__':
 
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    unittest.main()