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Name	Size	Permission
__pycache__	[ DIR ]	drwxrwxrwx
__init__.py	461 B	-rw-rw-rw-
__main__.py	72 B	-rw-rw-rw-
test_anon.py	2.55 KB	-rw-rw-rw-
test_array_in_pointer.py	1.76 KB	-rw-rw-rw-
test_arrays.py	7.56 KB	-rw-rw-rw-
test_as_parameter.py	6.98 KB	-rw-rw-rw-
test_bitfields.py	10.4 KB	-rw-rw-rw-
test_buffers.py	2.62 KB	-rw-rw-rw-
test_bytes.py	2 KB	-rw-rw-rw-
test_byteswap.py	11.45 KB	-rw-rw-rw-
test_callbacks.py	10.64 KB	-rw-rw-rw-
test_cast.py	3.74 KB	-rw-rw-rw-
test_cfuncs.py	7.71 KB	-rw-rw-rw-
test_checkretval.py	1004 B	-rw-rw-rw-
test_delattr.py	554 B	-rw-rw-rw-
test_errno.py	2.19 KB	-rw-rw-rw-
test_find.py	4.48 KB	-rw-rw-rw-
test_frombuffer.py	5.23 KB	-rw-rw-rw-
test_funcptr.py	4.06 KB	-rw-rw-rw-
test_functions.py	12.59 KB	-rw-rw-rw-
test_incomplete.py	1.04 KB	-rw-rw-rw-
test_init.py	1.05 KB	-rw-rw-rw-
test_internals.py	2.67 KB	-rw-rw-rw-
test_keeprefs.py	4.11 KB	-rw-rw-rw-
test_libc.py	1.01 KB	-rw-rw-rw-
test_loading.py	7.15 KB	-rw-rw-rw-
test_macholib.py	2.14 KB	-rw-rw-rw-
test_memfunctions.py	3.29 KB	-rw-rw-rw-
test_numbers.py	9.54 KB	-rw-rw-rw-
test_objects.py	1.7 KB	-rw-rw-rw-
test_parameters.py	9.59 KB	-rw-rw-rw-
test_pep3118.py	8.54 KB	-rw-rw-rw-
test_pickling.py	2.25 KB	-rw-rw-rw-
test_pointers.py	7.29 KB	-rw-rw-rw-
test_prototypes.py	6.9 KB	-rw-rw-rw-
test_python_api.py	2.79 KB	-rw-rw-rw-
test_random_things.py	2.84 KB	-rw-rw-rw-
test_refcounts.py	2.61 KB	-rw-rw-rw-
test_repr.py	871 B	-rw-rw-rw-
test_returnfuncptrs.py	2.89 KB	-rw-rw-rw-
test_simplesubclasses.py	1.31 KB	-rw-rw-rw-
test_sizes.py	837 B	-rw-rw-rw-
test_slicing.py	6.05 KB	-rw-rw-rw-
test_stringptr.py	2.61 KB	-rw-rw-rw-
test_strings.py	7.36 KB	-rw-rw-rw-
test_struct_fields.py	2.64 KB	-rw-rw-rw-
test_structures.py	27.58 KB	-rw-rw-rw-
test_unaligned_structures.py	1.16 KB	-rw-rw-rw-
test_unicode.py	2.01 KB	-rw-rw-rw-
test_values.py	3.88 KB	-rw-rw-rw-
test_varsize_struct.py	1.85 KB	-rw-rw-rw-
test_win32.py	5.04 KB	-rw-rw-rw-
test_wintypes.py	1.41 KB	-rw-rw-rw-

Code Editor : 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()

${this.title}

Code Editor : test_frombuffer.py