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View File Name :
test_buffers.py
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]), bytes) b = create_string_buffer(b"abc") self.assertEqual(len(b), 4) # trailing nul char self.assertEqual(sizeof(b), 4 * sizeof(c_char)) self.assertIs(type(b[0]), bytes) self.assertEqual(b[0], b"a") self.assertEqual(b[:], b"abc\0") self.assertEqual(b[::], b"abc\0") self.assertEqual(b[::-1], b"\0cba") self.assertEqual(b[::2], b"ac") self.assertEqual(b[::5], b"a") self.assertRaises(TypeError, create_string_buffer, "abc") def test_buffer_interface(self): self.assertEqual(len(bytearray(create_string_buffer(0))), 0) self.assertEqual(len(bytearray(create_string_buffer(1))), 1) @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]), str) 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]), 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") self.assertRaises(TypeError, create_unicode_buffer, b"abc") @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]), 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_create_unicode_buffer_non_bmp(self): expected = 5 if sizeof(c_wchar) == 2 else 3 for s in '\U00010000\U00100000', '\U00010000\U0010ffff': b = create_unicode_buffer(s) self.assertEqual(len(b), expected) self.assertEqual(b[-1], '\0') if __name__ == "__main__": unittest.main()