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//usr/lib/python2.4/site-packages/ctypes/test/test_buffers.py

from ctypes import *
import unittest

class StringBufferTestCase(unittest.TestCase):

def test_buffer(self):
        b = create_string_buffer(32)
        self.failUnlessEqual(len(b), 32)
        self.failUnlessEqual(sizeof(b), 32 * sizeof(c_char))
        self.failUnless(type(b[0]) is str)

b = create_string_buffer("abc")
        self.failUnlessEqual(len(b), 4) # trailing nul char
        self.failUnlessEqual(sizeof(b), 4 * sizeof(c_char))
        self.failUnless(type(b[0]) is str)
        self.failUnlessEqual(b[0], "a")
        self.failUnlessEqual(b[:], "abc\0")

def test_string_conversion(self):
        b = create_string_buffer(u"abc")
        self.failUnlessEqual(len(b), 4) # trailing nul char
        self.failUnlessEqual(sizeof(b), 4 * sizeof(c_char))
        self.failUnless(type(b[0]) is str)
        self.failUnlessEqual(b[0], "a")
        self.failUnlessEqual(b[:], "abc\0")

try:
        c_wchar
    except NameError:
        pass
    else:
        def test_unicode_buffer(self):
            b = create_unicode_buffer(32)
            self.failUnlessEqual(len(b), 32)
            self.failUnlessEqual(sizeof(b), 32 * sizeof(c_wchar))
            self.failUnless(type(b[0]) is unicode)

b = create_unicode_buffer(u"abc")
            self.failUnlessEqual(len(b), 4) # trailing nul char
            self.failUnlessEqual(sizeof(b), 4 * sizeof(c_wchar))
            self.failUnless(type(b[0]) is unicode)
            self.failUnlessEqual(b[0], u"a")
            self.failUnlessEqual(b[:], "abc\0")

def test_unicode_conversion(self):
            b = create_unicode_buffer("abc")
            self.failUnlessEqual(len(b), 4) # trailing nul char
            self.failUnlessEqual(sizeof(b), 4 * sizeof(c_wchar))
            self.failUnless(type(b[0]) is unicode)
            self.failUnlessEqual(b[0], u"a")
            self.failUnlessEqual(b[:], "abc\0")

if __name__ == "__main__":
    unittest.main()