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import unittest
import ctypes
from ctypes.test import need_symbol
import _ctypes_test
@need_symbol('c_wchar')
class UnicodeTestCase(unittest.TestCase):
def test_wcslen(self):
dll = ctypes.CDLL(_ctypes_test.__file__)
wcslen = dll.my_wcslen
wcslen.argtypes = [ctypes.c_wchar_p]
self.assertEqual(wcslen("abc"), 3)
self.assertEqual(wcslen("ab\u2070"), 3)
self.assertRaises(ctypes.ArgumentError, wcslen, b"ab\xe4")
def test_buffers(self):
buf = ctypes.create_unicode_buffer("abc")
self.assertEqual(len(buf), 3+1)
buf = ctypes.create_unicode_buffer("ab\xe4\xf6\xfc")
self.assertEqual(buf[:], "ab\xe4\xf6\xfc\0")
self.assertEqual(buf[::], "ab\xe4\xf6\xfc\0")
self.assertEqual(buf[::-1], '\x00\xfc\xf6\xe4ba')
self.assertEqual(buf[::2], 'a\xe4\xfc')
self.assertEqual(buf[6:5:-1], "")
def test_embedded_null(self):
class TestStruct(ctypes.Structure):
_fields_ = [("unicode", ctypes.c_wchar_p)]
t = TestStruct()
# This would raise a ValueError:
t.unicode = "foo\0bar\0\0"
func = ctypes.CDLL(_ctypes_test.__file__)._testfunc_p_p
class StringTestCase(UnicodeTestCase):
def setUp(self):
func.argtypes = [ctypes.c_char_p]
func.restype = ctypes.c_char_p
def tearDown(self):
func.argtypes = None
func.restype = ctypes.c_int
def test_func(self):
self.assertEqual(func(b"abc\xe4"), b"abc\xe4")
def test_buffers(self):
buf = ctypes.create_string_buffer(b"abc")
self.assertEqual(len(buf), 3+1)
buf = ctypes.create_string_buffer(b"ab\xe4\xf6\xfc")
self.assertEqual(buf[:], b"ab\xe4\xf6\xfc\0")
self.assertEqual(buf[::], b"ab\xe4\xf6\xfc\0")
self.assertEqual(buf[::-1], b'\x00\xfc\xf6\xe4ba')
self.assertEqual(buf[::2], b'a\xe4\xfc')
self.assertEqual(buf[6:5:-1], b"")
if __name__ == '__main__':
unittest.main()