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test_wintypes.py
# 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()