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📁 ..
📄 __init__.py(399 B)
📄 __main__.py(68 B)
📁 __pycache__
📄 test_anon.py(2.48 KB)
📄 test_array_in_pointer.py(1.7 KB)
📄 test_arrays.py(7.33 KB)
📄 test_as_parameter.py(6.76 KB)
📄 test_bitfields.py(9.98 KB)
📄 test_buffers.py(2.55 KB)
📄 test_bytes.py(1.94 KB)
📄 test_byteswap.py(11.14 KB)
📄 test_callbacks.py(10.33 KB)
📄 test_cast.py(3.64 KB)
📄 test_cfuncs.py(7.5 KB)
📄 test_checkretval.py(968 B)
📄 test_delattr.py(533 B)
📄 test_errno.py(2.12 KB)
📄 test_find.py(4.33 KB)
📄 test_frombuffer.py(5.09 KB)
📄 test_funcptr.py(3.93 KB)
📄 test_functions.py(12.26 KB)
📄 test_incomplete.py(1023 B)
📄 test_init.py(1.01 KB)
📄 test_internals.py(2.57 KB)
📄 test_keeprefs.py(3.96 KB)
📄 test_libc.py(1005 B)
📄 test_loading.py(6.91 KB)
📄 test_macholib.py(2.07 KB)
📄 test_memfunctions.py(3.22 KB)
📄 test_numbers.py(9.3 KB)
📄 test_objects.py(1.64 KB)
📄 test_parameters.py(9.35 KB)
📄 test_pep3118.py(8.32 KB)
📄 test_pickling.py(2.17 KB)
📄 test_pointers.py(7.07 KB)
📄 test_prototypes.py(6.68 KB)
📄 test_python_api.py(2.8 KB)
📄 test_random_things.py(2.77 KB)
📄 test_refcounts.py(2.52 KB)
📄 test_repr.py(842 B)
📄 test_returnfuncptrs.py(2.83 KB)
📄 test_simplesubclasses.py(1.26 KB)
📄 test_sizes.py(804 B)
📄 test_slicing.py(5.88 KB)
📄 test_stringptr.py(2.48 KB)
📄 test_strings.py(7.13 KB)
📄 test_struct_fields.py(2.36 KB)
📄 test_structures.py(26.57 KB)
📄 test_unaligned_structures.py(1.11 KB)
📄 test_unicode.py(1.95 KB)
📄 test_values.py(3.78 KB)
📄 test_varsize_struct.py(1.8 KB)
📄 test_win32.py(4.91 KB)
📄 test_wintypes.py(1.36 KB)

Editing: test_frombuffer.py

from ctypes import *
import array
import gc
import unittest

class X(Structure):
    _fields_ = [("c_int", c_int)]
    init_called = False
    def __init__(self):
        self._init_called = True

class Test(unittest.TestCase):
    def test_from_buffer(self):
        a = array.array("i", range(16))
        x = (c_int * 16).from_buffer(a)

y = X.from_buffer(a)
        self.assertEqual(y.c_int, a[0])
        self.assertFalse(y.init_called)

self.assertEqual(x[:], a.tolist())

a[0], a[-1] = 200, -200
        self.assertEqual(x[:], a.tolist())

self.assertRaises(BufferError, a.append, 100)
        self.assertRaises(BufferError, a.pop)

del x; del y; gc.collect(); gc.collect(); gc.collect()
        a.append(100)
        a.pop()
        x = (c_int * 16).from_buffer(a)

self.assertIn(a, [obj.obj if isinstance(obj, memoryview) else obj
                          for obj in x._objects.values()])

expected = x[:]
        del a; gc.collect(); gc.collect(); gc.collect()
        self.assertEqual(x[:], expected)

with self.assertRaisesRegex(TypeError, "not writable"):
            (c_char * 16).from_buffer(b"a" * 16)
        with self.assertRaisesRegex(TypeError, "not writable"):
            (c_char * 16).from_buffer(memoryview(b"a" * 16))
        with self.assertRaisesRegex(TypeError, "not C contiguous"):
            (c_char * 16).from_buffer(memoryview(bytearray(b"a" * 16))[::-1])
        msg = "bytes-like object is required"
        with self.assertRaisesRegex(TypeError, msg):
            (c_char * 16).from_buffer("a" * 16)

def test_fortran_contiguous(self):
        try:
            import _testbuffer
        except ImportError as err:
            self.skipTest(str(err))
        flags = _testbuffer.ND_WRITABLE | _testbuffer.ND_FORTRAN
        array = _testbuffer.ndarray(
            [97] * 16, format="B", shape=[4, 4], flags=flags)
        with self.assertRaisesRegex(TypeError, "not C contiguous"):
            (c_char * 16).from_buffer(array)
        array = memoryview(array)
        self.assertTrue(array.f_contiguous)
        self.assertFalse(array.c_contiguous)
        with self.assertRaisesRegex(TypeError, "not C contiguous"):
            (c_char * 16).from_buffer(array)

def test_from_buffer_with_offset(self):
        a = array.array("i", range(16))
        x = (c_int * 15).from_buffer(a, sizeof(c_int))

self.assertEqual(x[:], a.tolist()[1:])
        with self.assertRaises(ValueError):
            c_int.from_buffer(a, -1)
        with self.assertRaises(ValueError):
            (c_int * 16).from_buffer(a, sizeof(c_int))
        with self.assertRaises(ValueError):
            (c_int * 1).from_buffer(a, 16 * sizeof(c_int))

def test_from_buffer_memoryview(self):
        a = [c_char.from_buffer(memoryview(bytearray(b'a')))]
        a.append(a)
        del a
        gc.collect()  # Should not crash

def test_from_buffer_copy(self):
        a = array.array("i", range(16))
        x = (c_int * 16).from_buffer_copy(a)

y = X.from_buffer_copy(a)
        self.assertEqual(y.c_int, a[0])
        self.assertFalse(y.init_called)

self.assertEqual(x[:], list(range(16)))

a[0], a[-1] = 200, -200
        self.assertEqual(x[:], list(range(16)))

a.append(100)
        self.assertEqual(x[:], list(range(16)))

self.assertEqual(x._objects, None)

del a; gc.collect(); gc.collect(); gc.collect()
        self.assertEqual(x[:], list(range(16)))

x = (c_char * 16).from_buffer_copy(b"a" * 16)
        self.assertEqual(x[:], b"a" * 16)
        with self.assertRaises(TypeError):
            (c_char * 16).from_buffer_copy("a" * 16)

def test_from_buffer_copy_with_offset(self):
        a = array.array("i", range(16))
        x = (c_int * 15).from_buffer_copy(a, sizeof(c_int))

self.assertEqual(x[:], a.tolist()[1:])
        with self.assertRaises(ValueError):
            c_int.from_buffer_copy(a, -1)
        with self.assertRaises(ValueError):
            (c_int * 16).from_buffer_copy(a, sizeof(c_int))
        with self.assertRaises(ValueError):
            (c_int * 1).from_buffer_copy(a, 16 * sizeof(c_int))

def test_abstract(self):
        from ctypes import _Pointer, _SimpleCData, _CFuncPtr

self.assertRaises(TypeError, Array.from_buffer, bytearray(10))
        self.assertRaises(TypeError, Structure.from_buffer, bytearray(10))
        self.assertRaises(TypeError, Union.from_buffer, bytearray(10))
        self.assertRaises(TypeError, _CFuncPtr.from_buffer, bytearray(10))
        self.assertRaises(TypeError, _Pointer.from_buffer, bytearray(10))
        self.assertRaises(TypeError, _SimpleCData.from_buffer, bytearray(10))

self.assertRaises(TypeError, Array.from_buffer_copy, b"123")
        self.assertRaises(TypeError, Structure.from_buffer_copy, b"123")
        self.assertRaises(TypeError, Union.from_buffer_copy, b"123")
        self.assertRaises(TypeError, _CFuncPtr.from_buffer_copy, b"123")
        self.assertRaises(TypeError, _Pointer.from_buffer_copy, b"123")
        self.assertRaises(TypeError, _SimpleCData.from_buffer_copy, b"123")

if __name__ == '__main__':
    unittest.main()

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