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78 lines
2.8 KiB
78 lines
2.8 KiB
from ctypes import *
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import contextlib
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from test import support
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import unittest
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import sys
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def callback_func(arg):
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42 / arg
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raise ValueError(arg)
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@unittest.skipUnless(sys.platform == "win32", 'Windows-specific test')
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class call_function_TestCase(unittest.TestCase):
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# _ctypes.call_function is deprecated and private, but used by
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# Gary Bishp's readline module. If we have it, we must test it as well.
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def test(self):
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from _ctypes import call_function
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windll.kernel32.LoadLibraryA.restype = c_void_p
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windll.kernel32.GetProcAddress.argtypes = c_void_p, c_char_p
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windll.kernel32.GetProcAddress.restype = c_void_p
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hdll = windll.kernel32.LoadLibraryA(b"kernel32")
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funcaddr = windll.kernel32.GetProcAddress(hdll, b"GetModuleHandleA")
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self.assertEqual(call_function(funcaddr, (None,)),
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windll.kernel32.GetModuleHandleA(None))
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class CallbackTracbackTestCase(unittest.TestCase):
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# When an exception is raised in a ctypes callback function, the C
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# code prints a traceback.
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#
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# This test makes sure the exception types *and* the exception
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# value is printed correctly.
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#
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# Changed in 0.9.3: No longer is '(in callback)' prepended to the
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# error message - instead an additional frame for the C code is
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# created, then a full traceback printed. When SystemExit is
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# raised in a callback function, the interpreter exits.
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@contextlib.contextmanager
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def expect_unraisable(self, exc_type, exc_msg=None):
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with support.catch_unraisable_exception() as cm:
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yield
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self.assertIsInstance(cm.unraisable.exc_value, exc_type)
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if exc_msg is not None:
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self.assertEqual(str(cm.unraisable.exc_value), exc_msg)
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self.assertEqual(cm.unraisable.err_msg,
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"Exception ignored on calling ctypes "
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"callback function")
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self.assertIs(cm.unraisable.object, callback_func)
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def test_ValueError(self):
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cb = CFUNCTYPE(c_int, c_int)(callback_func)
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with self.expect_unraisable(ValueError, '42'):
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cb(42)
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def test_IntegerDivisionError(self):
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cb = CFUNCTYPE(c_int, c_int)(callback_func)
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with self.expect_unraisable(ZeroDivisionError):
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cb(0)
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def test_FloatDivisionError(self):
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cb = CFUNCTYPE(c_int, c_double)(callback_func)
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with self.expect_unraisable(ZeroDivisionError):
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cb(0.0)
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def test_TypeErrorDivisionError(self):
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cb = CFUNCTYPE(c_int, c_char_p)(callback_func)
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err_msg = "unsupported operand type(s) for /: 'int' and 'bytes'"
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with self.expect_unraisable(TypeError, err_msg):
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cb(b"spam")
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if __name__ == '__main__':
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unittest.main()
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