test_unicode.py 文件源码

def test_buffers(self):
            ctypes.set_conversion_mode("ascii", "strict")
            buf = ctypes.create_string_buffer(u"abc")
            self.assertEqual(len(buf), 3+1)

            ctypes.set_conversion_mode("ascii", "replace")
            buf = ctypes.create_string_buffer(u"ab")
            self.assertEqual(buf[:], "ab???\0")
            self.assertEqual(buf[::], "ab???\0")
            self.assertEqual(buf[::-1], "\0???ba")
            self.assertEqual(buf[::2], "a??")
            self.assertEqual(buf[6:5:-1], "")

            ctypes.set_conversion_mode("ascii", "ignore")
            buf = ctypes.create_string_buffer(u"ab")
            # is that correct? not sure.  But with 'ignore', you get what you pay for..
            self.assertEqual(buf[:], "ab\0\0\0\0")
            self.assertEqual(buf[::], "ab\0\0\0\0")
            self.assertEqual(buf[::-1], "\0\0\0\0ba")