EVOLUTION-NINJA

Edit File: test_parameters.py

import unittest from ctypes.test import need_symbol import test.support class SimpleTypesTestCase(unittest.TestCase): def setUp(self): import ctypes try: from _ctypes import set_conversion_mode except ImportError: pass else: self.prev_conv_mode = set_conversion_mode("ascii", "strict") def tearDown(self): try: from _ctypes import set_conversion_mode except ImportError: pass else: set_conversion_mode(*self.prev_conv_mode) def test_subclasses(self): from ctypes import c_void_p, c_char_p # ctypes 0.9.5 and before did overwrite from_param in SimpleType_new class CVOIDP(c_void_p): def from_param(cls, value): return value * 2 from_param = classmethod(from_param) class CCHARP(c_char_p): def from_param(cls, value): return value * 4 from_param = classmethod(from_param) self.assertEqual(CVOIDP.from_param("abc"), "abcabc") self.assertEqual(CCHARP.from_param("abc"), "abcabcabcabc") @need_symbol('c_wchar_p') def test_subclasses_c_wchar_p(self): from ctypes import c_wchar_p class CWCHARP(c_wchar_p): def from_param(cls, value): return value * 3 from_param = classmethod(from_param) self.assertEqual(CWCHARP.from_param("abc"), "abcabcabc") # XXX Replace by c_char_p tests def test_cstrings(self): from ctypes import c_char_p # c_char_p.from_param on a Python String packs the string # into a cparam object s = b"123" self.assertIs(c_char_p.from_param(s)._obj, s) # new in 0.9.1: convert (encode) unicode to ascii self.assertEqual(c_char_p.from_param(b"123")._obj, b"123") self.assertRaises(TypeError, c_char_p.from_param, "123\377") self.assertRaises(TypeError, c_char_p.from_param, 42) # calling c_char_p.from_param with a c_char_p instance # returns the argument itself: a = c_char_p(b"123") self.assertIs(c_char_p.from_param(a), a) @need_symbol('c_wchar_p') def test_cw_strings(self): from ctypes import c_wchar_p c_wchar_p.from_param("123") self.assertRaises(TypeError, c_wchar_p.from_param, 42) self.assertRaises(TypeError, c_wchar_p.from_param, b"123\377") pa = c_wchar_p.from_param(c_wchar_p("123")) self.assertEqual(type(pa), c_wchar_p) def test_int_pointers(self): from ctypes import c_short, c_uint, c_int, c_long, POINTER, pointer LPINT = POINTER(c_int) ## p = pointer(c_int(42)) ## x = LPINT.from_param(p) x = LPINT.from_param(pointer(c_int(42))) self.assertEqual(x.contents.value, 42) self.assertEqual(LPINT(c_int(42)).contents.value, 42) self.assertEqual(LPINT.from_param(None), None) if c_int != c_long: self.assertRaises(TypeError, LPINT.from_param, pointer(c_long(42))) self.assertRaises(TypeError, LPINT.from_param, pointer(c_uint(42))) self.assertRaises(TypeError, LPINT.from_param, pointer(c_short(42))) def test_byref_pointer(self): # The from_param class method of POINTER(typ) classes accepts what is # returned by byref(obj), it type(obj) == typ from ctypes import c_short, c_uint, c_int, c_long, POINTER, byref LPINT = POINTER(c_int) LPINT.from_param(byref(c_int(42))) self.assertRaises(TypeError, LPINT.from_param, byref(c_short(22))) if c_int != c_long: self.assertRaises(TypeError, LPINT.from_param, byref(c_long(22))) self.assertRaises(TypeError, LPINT.from_param, byref(c_uint(22))) def test_byref_pointerpointer(self): # See above from ctypes import c_short, c_uint, c_int, c_long, pointer, POINTER, byref LPLPINT = POINTER(POINTER(c_int)) LPLPINT.from_param(byref(pointer(c_int(42)))) self.assertRaises(TypeError, LPLPINT.from_param, byref(pointer(c_short(22)))) if c_int != c_long: self.assertRaises(TypeError, LPLPINT.from_param, byref(pointer(c_long(22)))) self.assertRaises(TypeError, LPLPINT.from_param, byref(pointer(c_uint(22)))) def test_array_pointers(self): from ctypes import c_short, c_uint, c_int, c_long, POINTER INTARRAY = c_int * 3 ia = INTARRAY() self.assertEqual(len(ia), 3) self.assertEqual([ia[i] for i in range(3)], [0, 0, 0]) # Pointers are only compatible with arrays containing items of # the same type! LPINT = POINTER(c_int) LPINT.from_param((c_int*3)()) self.assertRaises(TypeError, LPINT.from_param, c_short*3) self.assertRaises(TypeError, LPINT.from_param, c_long*3) self.assertRaises(TypeError, LPINT.from_param, c_uint*3) def test_noctypes_argtype(self): import _ctypes_test from ctypes import CDLL, c_void_p, ArgumentError func = CDLL(_ctypes_test.__file__)._testfunc_p_p func.restype = c_void_p # TypeError: has no from_param method self.assertRaises(TypeError, setattr, func, "argtypes", (object,)) class Adapter(object): def from_param(cls, obj): return None func.argtypes = (Adapter(),) self.assertEqual(func(None), None) self.assertEqual(func(object()), None) class Adapter(object): def from_param(cls, obj): return obj func.argtypes = (Adapter(),) # don't know how to convert parameter 1 self.assertRaises(ArgumentError, func, object()) self.assertEqual(func(c_void_p(42)), 42) class Adapter(object): def from_param(cls, obj): raise ValueError(obj) func.argtypes = (Adapter(),) # ArgumentError: argument 1: ValueError: 99 self.assertRaises(ArgumentError, func, 99) def test_abstract(self): from ctypes import (Array, Structure, Union, _Pointer, _SimpleCData, _CFuncPtr) self.assertRaises(TypeError, Array.from_param, 42) self.assertRaises(TypeError, Structure.from_param, 42) self.assertRaises(TypeError, Union.from_param, 42) self.assertRaises(TypeError, _CFuncPtr.from_param, 42) self.assertRaises(TypeError, _Pointer.from_param, 42) self.assertRaises(TypeError, _SimpleCData.from_param, 42) @test.support.cpython_only def test_issue31311(self): # __setstate__ should neither raise a SystemError nor crash in case # of a bad __dict__. from ctypes import Structure class BadStruct(Structure): @property def __dict__(self): pass with self.assertRaises(TypeError): BadStruct().__setstate__({}, b'foo') class WorseStruct(Structure): @property def __dict__(self): 1/0 with self.assertRaises(ZeroDivisionError): WorseStruct().__setstate__({}, b'foo') ################################################################ if __name__ == '__main__': unittest.main()