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from ctypes import *
from ctypes.test import need_symbol
import unittest
class StringBufferTestCase(unittest.TestCase):
def test_buffer(self):
b = create_string_buffer(32)
self.assertEqual(len(b), 32)
self.assertEqual(sizeof(b), 32 * sizeof(c_char))
self.assertIs(type(b[0]), str)
b = create_string_buffer("abc")
self.assertEqual(len(b), 4) # trailing nul char
self.assertEqual(sizeof(b), 4 * sizeof(c_char))
self.assertIs(type(b[0]), str)
self.assertEqual(b[0], "a")
self.assertEqual(b[:], "abc\0")
self.assertEqual(b[::], "abc\0")
self.assertEqual(b[::-1], "\0cba")
self.assertEqual(b[::2], "ac")
self.assertEqual(b[::5], "a")
def test_buffer_interface(self):
self.assertEqual(len(bytearray(create_string_buffer(0))), 0)
self.assertEqual(len(bytearray(create_string_buffer(1))), 1)
def test_string_conversion(self):
b = create_string_buffer(u"abc")
self.assertEqual(len(b), 4) # trailing nul char
self.assertEqual(sizeof(b), 4 * sizeof(c_char))
self.assertTrue(type(b[0]) is str)
self.assertEqual(b[0], "a")
self.assertEqual(b[:], "abc\0")
self.assertEqual(b[::], "abc\0")
self.assertEqual(b[::-1], "\0cba")
self.assertEqual(b[::2], "ac")
self.assertEqual(b[::5], "a")
@need_symbol('c_wchar')
def test_unicode_buffer(self):
b = create_unicode_buffer(32)
self.assertEqual(len(b), 32)
self.assertEqual(sizeof(b), 32 * sizeof(c_wchar))
self.assertIs(type(b[0]), unicode)
b = create_unicode_buffer(u"abc")
self.assertEqual(len(b), 4) # trailing nul char
self.assertEqual(sizeof(b), 4 * sizeof(c_wchar))
self.assertIs(type(b[0]), unicode)
self.assertEqual(b[0], u"a")
self.assertEqual(b[:], "abc\0")
self.assertEqual(b[::], "abc\0")
self.assertEqual(b[::-1], "\0cba")
self.assertEqual(b[::2], "ac")
self.assertEqual(b[::5], "a")
@need_symbol('c_wchar')
def test_unicode_conversion(self):
b = create_unicode_buffer("abc")
self.assertEqual(len(b), 4) # trailing nul char
self.assertEqual(sizeof(b), 4 * sizeof(c_wchar))
self.assertIs(type(b[0]), unicode)
self.assertEqual(b[0], u"a")
self.assertEqual(b[:], "abc\0")
self.assertEqual(b[::], "abc\0")
self.assertEqual(b[::-1], "\0cba")
self.assertEqual(b[::2], "ac")
self.assertEqual(b[::5], "a")
if __name__ == "__main__":
unittest.main()