test_unicode.py 文件源码

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

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

        ctypes.set_conversion_mode("ascii", "ignore")
        buf = ctypes.create_unicode_buffer("ab")
        # is that correct? not sure.  But with 'ignore', you get what you pay for..
        self.assertEqual(buf[:], u"ab\0\0\0\0")
        self.assertEqual(buf[::], u"ab\0\0\0\0")
        self.assertEqual(buf[::-1], u"\0\0\0\0ba")
        self.assertEqual(buf[::2], u"a\0\0")
        self.assertEqual(buf[6:5:-1], u"")