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# See <https://learn.microsoft.com/en-us/windows/win32/winprog/windows-data-types>
# for reference.
import unittest
# also work on POSIX
from ctypes import *
from ctypes import wintypes
class WinTypesTest(unittest.TestCase):
def test_variant_bool(self):
# reads 16-bits from memory, anything non-zero is True
for true_value in (1, 32767, 32768, 65535, 65537):
true = POINTER(c_int16)(c_int16(true_value))
value = cast(true, POINTER(wintypes.VARIANT_BOOL))
self.assertEqual(repr(value.contents), 'VARIANT_BOOL(True)')
vb = wintypes.VARIANT_BOOL()
self.assertIs(vb.value, False)
vb.value = True
self.assertIs(vb.value, True)
vb.value = true_value
self.assertIs(vb.value, True)
for false_value in (0, 65536, 262144, 2**33):
false = POINTER(c_int16)(c_int16(false_value))
value = cast(false, POINTER(wintypes.VARIANT_BOOL))
self.assertEqual(repr(value.contents), 'VARIANT_BOOL(False)')
# allow any bool conversion on assignment to value
for set_value in (65536, 262144, 2**33):
vb = wintypes.VARIANT_BOOL()
vb.value = set_value
self.assertIs(vb.value, True)
vb = wintypes.VARIANT_BOOL()
vb.value = [2, 3]
self.assertIs(vb.value, True)
vb.value = []
self.assertIs(vb.value, False)
def assertIsSigned(self, ctype):
self.assertLess(ctype(-1).value, 0)
def assertIsUnsigned(self, ctype):
self.assertGreater(ctype(-1).value, 0)
def test_signedness(self):
for ctype in (wintypes.BYTE, wintypes.WORD, wintypes.DWORD,
wintypes.BOOLEAN, wintypes.UINT, wintypes.ULONG):
with self.subTest(ctype=ctype):
self.assertIsUnsigned(ctype)
for ctype in (wintypes.BOOL, wintypes.INT, wintypes.LONG):
with self.subTest(ctype=ctype):
self.assertIsSigned(ctype)
if __name__ == "__main__":
unittest.main()