mirror of https://github.com/python/cpython
661 lines
22 KiB
Python
661 lines
22 KiB
Python
"""Unit tests for the memoryview
|
|
|
|
Some tests are in test_bytes. Many tests that require _testbuffer.ndarray
|
|
are in test_buffer.
|
|
"""
|
|
|
|
import unittest
|
|
import test.support
|
|
import sys
|
|
import gc
|
|
import weakref
|
|
import array
|
|
import io
|
|
import copy
|
|
import pickle
|
|
import struct
|
|
|
|
from test.support import import_helper
|
|
|
|
|
|
class AbstractMemoryTests:
|
|
source_bytes = b"abcdef"
|
|
|
|
@property
|
|
def _source(self):
|
|
return self.source_bytes
|
|
|
|
@property
|
|
def _types(self):
|
|
return filter(None, [self.ro_type, self.rw_type])
|
|
|
|
def check_getitem_with_type(self, tp):
|
|
b = tp(self._source)
|
|
oldrefcount = sys.getrefcount(b)
|
|
m = self._view(b)
|
|
self.assertEqual(m[0], ord(b"a"))
|
|
self.assertIsInstance(m[0], int)
|
|
self.assertEqual(m[5], ord(b"f"))
|
|
self.assertEqual(m[-1], ord(b"f"))
|
|
self.assertEqual(m[-6], ord(b"a"))
|
|
# Bounds checking
|
|
self.assertRaises(IndexError, lambda: m[6])
|
|
self.assertRaises(IndexError, lambda: m[-7])
|
|
self.assertRaises(IndexError, lambda: m[sys.maxsize])
|
|
self.assertRaises(IndexError, lambda: m[-sys.maxsize])
|
|
# Type checking
|
|
self.assertRaises(TypeError, lambda: m[None])
|
|
self.assertRaises(TypeError, lambda: m[0.0])
|
|
self.assertRaises(TypeError, lambda: m["a"])
|
|
m = None
|
|
self.assertEqual(sys.getrefcount(b), oldrefcount)
|
|
|
|
def test_getitem(self):
|
|
for tp in self._types:
|
|
self.check_getitem_with_type(tp)
|
|
|
|
def test_iter(self):
|
|
for tp in self._types:
|
|
b = tp(self._source)
|
|
m = self._view(b)
|
|
self.assertEqual(list(m), [m[i] for i in range(len(m))])
|
|
|
|
def test_setitem_readonly(self):
|
|
if not self.ro_type:
|
|
self.skipTest("no read-only type to test")
|
|
b = self.ro_type(self._source)
|
|
oldrefcount = sys.getrefcount(b)
|
|
m = self._view(b)
|
|
def setitem(value):
|
|
m[0] = value
|
|
self.assertRaises(TypeError, setitem, b"a")
|
|
self.assertRaises(TypeError, setitem, 65)
|
|
self.assertRaises(TypeError, setitem, memoryview(b"a"))
|
|
m = None
|
|
self.assertEqual(sys.getrefcount(b), oldrefcount)
|
|
|
|
def test_setitem_writable(self):
|
|
if not self.rw_type:
|
|
self.skipTest("no writable type to test")
|
|
tp = self.rw_type
|
|
b = self.rw_type(self._source)
|
|
oldrefcount = sys.getrefcount(b)
|
|
m = self._view(b)
|
|
m[0] = ord(b'1')
|
|
self._check_contents(tp, b, b"1bcdef")
|
|
m[0:1] = tp(b"0")
|
|
self._check_contents(tp, b, b"0bcdef")
|
|
m[1:3] = tp(b"12")
|
|
self._check_contents(tp, b, b"012def")
|
|
m[1:1] = tp(b"")
|
|
self._check_contents(tp, b, b"012def")
|
|
m[:] = tp(b"abcdef")
|
|
self._check_contents(tp, b, b"abcdef")
|
|
|
|
# Overlapping copies of a view into itself
|
|
m[0:3] = m[2:5]
|
|
self._check_contents(tp, b, b"cdedef")
|
|
m[:] = tp(b"abcdef")
|
|
m[2:5] = m[0:3]
|
|
self._check_contents(tp, b, b"ababcf")
|
|
|
|
def setitem(key, value):
|
|
m[key] = tp(value)
|
|
# Bounds checking
|
|
self.assertRaises(IndexError, setitem, 6, b"a")
|
|
self.assertRaises(IndexError, setitem, -7, b"a")
|
|
self.assertRaises(IndexError, setitem, sys.maxsize, b"a")
|
|
self.assertRaises(IndexError, setitem, -sys.maxsize, b"a")
|
|
# Wrong index/slice types
|
|
self.assertRaises(TypeError, setitem, 0.0, b"a")
|
|
self.assertRaises(TypeError, setitem, (0,), b"a")
|
|
self.assertRaises(TypeError, setitem, (slice(0,1,1), 0), b"a")
|
|
self.assertRaises(TypeError, setitem, (0, slice(0,1,1)), b"a")
|
|
self.assertRaises(TypeError, setitem, (0,), b"a")
|
|
self.assertRaises(TypeError, setitem, "a", b"a")
|
|
# Not implemented: multidimensional slices
|
|
slices = (slice(0,1,1), slice(0,1,2))
|
|
self.assertRaises(NotImplementedError, setitem, slices, b"a")
|
|
# Trying to resize the memory object
|
|
exc = ValueError if m.format == 'c' else TypeError
|
|
self.assertRaises(exc, setitem, 0, b"")
|
|
self.assertRaises(exc, setitem, 0, b"ab")
|
|
self.assertRaises(ValueError, setitem, slice(1,1), b"a")
|
|
self.assertRaises(ValueError, setitem, slice(0,2), b"a")
|
|
|
|
m = None
|
|
self.assertEqual(sys.getrefcount(b), oldrefcount)
|
|
|
|
def test_delitem(self):
|
|
for tp in self._types:
|
|
b = tp(self._source)
|
|
m = self._view(b)
|
|
with self.assertRaises(TypeError):
|
|
del m[1]
|
|
with self.assertRaises(TypeError):
|
|
del m[1:4]
|
|
|
|
def test_tobytes(self):
|
|
for tp in self._types:
|
|
m = self._view(tp(self._source))
|
|
b = m.tobytes()
|
|
# This calls self.getitem_type() on each separate byte of b"abcdef"
|
|
expected = b"".join(
|
|
self.getitem_type(bytes([c])) for c in b"abcdef")
|
|
self.assertEqual(b, expected)
|
|
self.assertIsInstance(b, bytes)
|
|
|
|
def test_tolist(self):
|
|
for tp in self._types:
|
|
m = self._view(tp(self._source))
|
|
l = m.tolist()
|
|
self.assertEqual(l, list(b"abcdef"))
|
|
|
|
def test_compare(self):
|
|
# memoryviews can compare for equality with other objects
|
|
# having the buffer interface.
|
|
for tp in self._types:
|
|
m = self._view(tp(self._source))
|
|
for tp_comp in self._types:
|
|
self.assertTrue(m == tp_comp(b"abcdef"))
|
|
self.assertFalse(m != tp_comp(b"abcdef"))
|
|
self.assertFalse(m == tp_comp(b"abcde"))
|
|
self.assertTrue(m != tp_comp(b"abcde"))
|
|
self.assertFalse(m == tp_comp(b"abcde1"))
|
|
self.assertTrue(m != tp_comp(b"abcde1"))
|
|
self.assertTrue(m == m)
|
|
self.assertTrue(m == m[:])
|
|
self.assertTrue(m[0:6] == m[:])
|
|
self.assertFalse(m[0:5] == m)
|
|
|
|
# Comparison with objects which don't support the buffer API
|
|
self.assertFalse(m == "abcdef")
|
|
self.assertTrue(m != "abcdef")
|
|
self.assertFalse("abcdef" == m)
|
|
self.assertTrue("abcdef" != m)
|
|
|
|
# Unordered comparisons
|
|
for c in (m, b"abcdef"):
|
|
self.assertRaises(TypeError, lambda: m < c)
|
|
self.assertRaises(TypeError, lambda: c <= m)
|
|
self.assertRaises(TypeError, lambda: m >= c)
|
|
self.assertRaises(TypeError, lambda: c > m)
|
|
|
|
def check_attributes_with_type(self, tp):
|
|
m = self._view(tp(self._source))
|
|
self.assertEqual(m.format, self.format)
|
|
self.assertEqual(m.itemsize, self.itemsize)
|
|
self.assertEqual(m.ndim, 1)
|
|
self.assertEqual(m.shape, (6,))
|
|
self.assertEqual(len(m), 6)
|
|
self.assertEqual(m.strides, (self.itemsize,))
|
|
self.assertEqual(m.suboffsets, ())
|
|
return m
|
|
|
|
def test_attributes_readonly(self):
|
|
if not self.ro_type:
|
|
self.skipTest("no read-only type to test")
|
|
m = self.check_attributes_with_type(self.ro_type)
|
|
self.assertEqual(m.readonly, True)
|
|
|
|
def test_attributes_writable(self):
|
|
if not self.rw_type:
|
|
self.skipTest("no writable type to test")
|
|
m = self.check_attributes_with_type(self.rw_type)
|
|
self.assertEqual(m.readonly, False)
|
|
|
|
def test_getbuffer(self):
|
|
# Test PyObject_GetBuffer() on a memoryview object.
|
|
for tp in self._types:
|
|
b = tp(self._source)
|
|
oldrefcount = sys.getrefcount(b)
|
|
m = self._view(b)
|
|
oldviewrefcount = sys.getrefcount(m)
|
|
s = str(m, "utf-8")
|
|
self._check_contents(tp, b, s.encode("utf-8"))
|
|
self.assertEqual(sys.getrefcount(m), oldviewrefcount)
|
|
m = None
|
|
self.assertEqual(sys.getrefcount(b), oldrefcount)
|
|
|
|
def test_gc(self):
|
|
for tp in self._types:
|
|
if not isinstance(tp, type):
|
|
# If tp is a factory rather than a plain type, skip
|
|
continue
|
|
|
|
class MyView():
|
|
def __init__(self, base):
|
|
self.m = memoryview(base)
|
|
class MySource(tp):
|
|
pass
|
|
class MyObject:
|
|
pass
|
|
|
|
# Create a reference cycle through a memoryview object.
|
|
# This exercises mbuf_clear().
|
|
b = MySource(tp(b'abc'))
|
|
m = self._view(b)
|
|
o = MyObject()
|
|
b.m = m
|
|
b.o = o
|
|
wr = weakref.ref(o)
|
|
b = m = o = None
|
|
# The cycle must be broken
|
|
gc.collect()
|
|
self.assertTrue(wr() is None, wr())
|
|
|
|
# This exercises memory_clear().
|
|
m = MyView(tp(b'abc'))
|
|
o = MyObject()
|
|
m.x = m
|
|
m.o = o
|
|
wr = weakref.ref(o)
|
|
m = o = None
|
|
# The cycle must be broken
|
|
gc.collect()
|
|
self.assertTrue(wr() is None, wr())
|
|
|
|
def _check_released(self, m, tp):
|
|
check = self.assertRaisesRegex(ValueError, "released")
|
|
with check: bytes(m)
|
|
with check: m.tobytes()
|
|
with check: m.tolist()
|
|
with check: m[0]
|
|
with check: m[0] = b'x'
|
|
with check: len(m)
|
|
with check: m.format
|
|
with check: m.itemsize
|
|
with check: m.ndim
|
|
with check: m.readonly
|
|
with check: m.shape
|
|
with check: m.strides
|
|
with check:
|
|
with m:
|
|
pass
|
|
# str() and repr() still function
|
|
self.assertIn("released memory", str(m))
|
|
self.assertIn("released memory", repr(m))
|
|
self.assertEqual(m, m)
|
|
self.assertNotEqual(m, memoryview(tp(self._source)))
|
|
self.assertNotEqual(m, tp(self._source))
|
|
|
|
def test_contextmanager(self):
|
|
for tp in self._types:
|
|
b = tp(self._source)
|
|
m = self._view(b)
|
|
with m as cm:
|
|
self.assertIs(cm, m)
|
|
self._check_released(m, tp)
|
|
m = self._view(b)
|
|
# Can release explicitly inside the context manager
|
|
with m:
|
|
m.release()
|
|
|
|
def test_release(self):
|
|
for tp in self._types:
|
|
b = tp(self._source)
|
|
m = self._view(b)
|
|
m.release()
|
|
self._check_released(m, tp)
|
|
# Can be called a second time (it's a no-op)
|
|
m.release()
|
|
self._check_released(m, tp)
|
|
|
|
def test_writable_readonly(self):
|
|
# Issue #10451: memoryview incorrectly exposes a readonly
|
|
# buffer as writable causing a segfault if using mmap
|
|
tp = self.ro_type
|
|
if tp is None:
|
|
self.skipTest("no read-only type to test")
|
|
b = tp(self._source)
|
|
m = self._view(b)
|
|
i = io.BytesIO(b'ZZZZ')
|
|
self.assertRaises(TypeError, i.readinto, m)
|
|
|
|
def test_getbuf_fail(self):
|
|
self.assertRaises(TypeError, self._view, {})
|
|
|
|
def test_hash(self):
|
|
# Memoryviews of readonly (hashable) types are hashable, and they
|
|
# hash as hash(obj.tobytes()).
|
|
tp = self.ro_type
|
|
if tp is None:
|
|
self.skipTest("no read-only type to test")
|
|
b = tp(self._source)
|
|
m = self._view(b)
|
|
self.assertEqual(hash(m), hash(b"abcdef"))
|
|
# Releasing the memoryview keeps the stored hash value (as with weakrefs)
|
|
m.release()
|
|
self.assertEqual(hash(m), hash(b"abcdef"))
|
|
# Hashing a memoryview for the first time after it is released
|
|
# results in an error (as with weakrefs).
|
|
m = self._view(b)
|
|
m.release()
|
|
self.assertRaises(ValueError, hash, m)
|
|
|
|
def test_hash_writable(self):
|
|
# Memoryviews of writable types are unhashable
|
|
tp = self.rw_type
|
|
if tp is None:
|
|
self.skipTest("no writable type to test")
|
|
b = tp(self._source)
|
|
m = self._view(b)
|
|
self.assertRaises(ValueError, hash, m)
|
|
|
|
def test_weakref(self):
|
|
# Check memoryviews are weakrefable
|
|
for tp in self._types:
|
|
b = tp(self._source)
|
|
m = self._view(b)
|
|
L = []
|
|
def callback(wr, b=b):
|
|
L.append(b)
|
|
wr = weakref.ref(m, callback)
|
|
self.assertIs(wr(), m)
|
|
del m
|
|
test.support.gc_collect()
|
|
self.assertIs(wr(), None)
|
|
self.assertIs(L[0], b)
|
|
|
|
def test_reversed(self):
|
|
for tp in self._types:
|
|
b = tp(self._source)
|
|
m = self._view(b)
|
|
aslist = list(reversed(m.tolist()))
|
|
self.assertEqual(list(reversed(m)), aslist)
|
|
self.assertEqual(list(reversed(m)), list(m[::-1]))
|
|
|
|
def test_toreadonly(self):
|
|
for tp in self._types:
|
|
b = tp(self._source)
|
|
m = self._view(b)
|
|
mm = m.toreadonly()
|
|
self.assertTrue(mm.readonly)
|
|
self.assertTrue(memoryview(mm).readonly)
|
|
self.assertEqual(mm.tolist(), m.tolist())
|
|
mm.release()
|
|
m.tolist()
|
|
|
|
def test_issue22668(self):
|
|
a = array.array('H', [256, 256, 256, 256])
|
|
x = memoryview(a)
|
|
m = x.cast('B')
|
|
b = m.cast('H')
|
|
c = b[0:2]
|
|
d = memoryview(b)
|
|
|
|
del b
|
|
|
|
self.assertEqual(c[0], 256)
|
|
self.assertEqual(d[0], 256)
|
|
self.assertEqual(c.format, "H")
|
|
self.assertEqual(d.format, "H")
|
|
|
|
_ = m.cast('I')
|
|
self.assertEqual(c[0], 256)
|
|
self.assertEqual(d[0], 256)
|
|
self.assertEqual(c.format, "H")
|
|
self.assertEqual(d.format, "H")
|
|
|
|
|
|
# Variations on source objects for the buffer: bytes-like objects, then arrays
|
|
# with itemsize > 1.
|
|
# NOTE: support for multi-dimensional objects is unimplemented.
|
|
|
|
class BaseBytesMemoryTests(AbstractMemoryTests):
|
|
ro_type = bytes
|
|
rw_type = bytearray
|
|
getitem_type = bytes
|
|
itemsize = 1
|
|
format = 'B'
|
|
|
|
class BaseArrayMemoryTests(AbstractMemoryTests):
|
|
ro_type = None
|
|
rw_type = lambda self, b: array.array('i', list(b))
|
|
getitem_type = lambda self, b: array.array('i', list(b)).tobytes()
|
|
itemsize = array.array('i').itemsize
|
|
format = 'i'
|
|
|
|
@unittest.skip('XXX test should be adapted for non-byte buffers')
|
|
def test_getbuffer(self):
|
|
pass
|
|
|
|
@unittest.skip('XXX NotImplementedError: tolist() only supports byte views')
|
|
def test_tolist(self):
|
|
pass
|
|
|
|
|
|
# Variations on indirection levels: memoryview, slice of memoryview,
|
|
# slice of slice of memoryview.
|
|
# This is important to test allocation subtleties.
|
|
|
|
class BaseMemoryviewTests:
|
|
def _view(self, obj):
|
|
return memoryview(obj)
|
|
|
|
def _check_contents(self, tp, obj, contents):
|
|
self.assertEqual(obj, tp(contents))
|
|
|
|
class BaseMemorySliceTests:
|
|
source_bytes = b"XabcdefY"
|
|
|
|
def _view(self, obj):
|
|
m = memoryview(obj)
|
|
return m[1:7]
|
|
|
|
def _check_contents(self, tp, obj, contents):
|
|
self.assertEqual(obj[1:7], tp(contents))
|
|
|
|
def test_refs(self):
|
|
for tp in self._types:
|
|
m = memoryview(tp(self._source))
|
|
oldrefcount = sys.getrefcount(m)
|
|
m[1:2]
|
|
self.assertEqual(sys.getrefcount(m), oldrefcount)
|
|
|
|
class BaseMemorySliceSliceTests:
|
|
source_bytes = b"XabcdefY"
|
|
|
|
def _view(self, obj):
|
|
m = memoryview(obj)
|
|
return m[:7][1:]
|
|
|
|
def _check_contents(self, tp, obj, contents):
|
|
self.assertEqual(obj[1:7], tp(contents))
|
|
|
|
|
|
# Concrete test classes
|
|
|
|
class BytesMemoryviewTest(unittest.TestCase,
|
|
BaseMemoryviewTests, BaseBytesMemoryTests):
|
|
|
|
def test_constructor(self):
|
|
for tp in self._types:
|
|
ob = tp(self._source)
|
|
self.assertTrue(memoryview(ob))
|
|
self.assertTrue(memoryview(object=ob))
|
|
self.assertRaises(TypeError, memoryview)
|
|
self.assertRaises(TypeError, memoryview, ob, ob)
|
|
self.assertRaises(TypeError, memoryview, argument=ob)
|
|
self.assertRaises(TypeError, memoryview, ob, argument=True)
|
|
|
|
class ArrayMemoryviewTest(unittest.TestCase,
|
|
BaseMemoryviewTests, BaseArrayMemoryTests):
|
|
|
|
def test_array_assign(self):
|
|
# Issue #4569: segfault when mutating a memoryview with itemsize != 1
|
|
a = array.array('i', range(10))
|
|
m = memoryview(a)
|
|
new_a = array.array('i', range(9, -1, -1))
|
|
m[:] = new_a
|
|
self.assertEqual(a, new_a)
|
|
|
|
|
|
class BytesMemorySliceTest(unittest.TestCase,
|
|
BaseMemorySliceTests, BaseBytesMemoryTests):
|
|
pass
|
|
|
|
class ArrayMemorySliceTest(unittest.TestCase,
|
|
BaseMemorySliceTests, BaseArrayMemoryTests):
|
|
pass
|
|
|
|
class BytesMemorySliceSliceTest(unittest.TestCase,
|
|
BaseMemorySliceSliceTests, BaseBytesMemoryTests):
|
|
pass
|
|
|
|
class ArrayMemorySliceSliceTest(unittest.TestCase,
|
|
BaseMemorySliceSliceTests, BaseArrayMemoryTests):
|
|
pass
|
|
|
|
|
|
class OtherTest(unittest.TestCase):
|
|
def test_ctypes_cast(self):
|
|
# Issue 15944: Allow all source formats when casting to bytes.
|
|
ctypes = import_helper.import_module("ctypes")
|
|
p6 = bytes(ctypes.c_double(0.6))
|
|
|
|
d = ctypes.c_double()
|
|
m = memoryview(d).cast("B")
|
|
m[:2] = p6[:2]
|
|
m[2:] = p6[2:]
|
|
self.assertEqual(d.value, 0.6)
|
|
|
|
for format in "Bbc":
|
|
with self.subTest(format):
|
|
d = ctypes.c_double()
|
|
m = memoryview(d).cast(format)
|
|
m[:2] = memoryview(p6).cast(format)[:2]
|
|
m[2:] = memoryview(p6).cast(format)[2:]
|
|
self.assertEqual(d.value, 0.6)
|
|
|
|
def test_half_float(self):
|
|
half_data = struct.pack('eee', 0.0, -1.5, 1.5)
|
|
float_data = struct.pack('fff', 0.0, -1.5, 1.5)
|
|
half_view = memoryview(half_data).cast('e')
|
|
float_view = memoryview(float_data).cast('f')
|
|
self.assertEqual(half_view.nbytes * 2, float_view.nbytes)
|
|
self.assertListEqual(half_view.tolist(), float_view.tolist())
|
|
|
|
def test_memoryview_hex(self):
|
|
# Issue #9951: memoryview.hex() segfaults with non-contiguous buffers.
|
|
x = b'0' * 200000
|
|
m1 = memoryview(x)
|
|
m2 = m1[::-1]
|
|
self.assertEqual(m2.hex(), '30' * 200000)
|
|
|
|
def test_copy(self):
|
|
m = memoryview(b'abc')
|
|
with self.assertRaises(TypeError):
|
|
copy.copy(m)
|
|
|
|
def test_pickle(self):
|
|
m = memoryview(b'abc')
|
|
for proto in range(pickle.HIGHEST_PROTOCOL + 1):
|
|
with self.assertRaises(TypeError):
|
|
pickle.dumps(m, proto)
|
|
|
|
def test_use_released_memory(self):
|
|
# gh-92888: Previously it was possible to use a memoryview even after
|
|
# backing buffer is freed in certain cases. This tests that those
|
|
# cases raise an exception.
|
|
size = 128
|
|
def release():
|
|
m.release()
|
|
nonlocal ba
|
|
ba = bytearray(size)
|
|
class MyIndex:
|
|
def __index__(self):
|
|
release()
|
|
return 4
|
|
class MyFloat:
|
|
def __float__(self):
|
|
release()
|
|
return 4.25
|
|
class MyBool:
|
|
def __bool__(self):
|
|
release()
|
|
return True
|
|
|
|
ba = None
|
|
m = memoryview(bytearray(b'\xff'*size))
|
|
with self.assertRaises(ValueError):
|
|
m[MyIndex()]
|
|
|
|
ba = None
|
|
m = memoryview(bytearray(b'\xff'*size))
|
|
self.assertEqual(list(m[:MyIndex()]), [255] * 4)
|
|
|
|
ba = None
|
|
m = memoryview(bytearray(b'\xff'*size))
|
|
self.assertEqual(list(m[MyIndex():8]), [255] * 4)
|
|
|
|
ba = None
|
|
m = memoryview(bytearray(b'\xff'*size)).cast('B', (64, 2))
|
|
with self.assertRaisesRegex(ValueError, "operation forbidden"):
|
|
m[MyIndex(), 0]
|
|
|
|
ba = None
|
|
m = memoryview(bytearray(b'\xff'*size)).cast('B', (2, 64))
|
|
with self.assertRaisesRegex(ValueError, "operation forbidden"):
|
|
m[0, MyIndex()]
|
|
|
|
ba = None
|
|
m = memoryview(bytearray(b'\xff'*size))
|
|
with self.assertRaisesRegex(ValueError, "operation forbidden"):
|
|
m[MyIndex()] = 42
|
|
self.assertEqual(ba[:8], b'\0'*8)
|
|
|
|
ba = None
|
|
m = memoryview(bytearray(b'\xff'*size))
|
|
with self.assertRaisesRegex(ValueError, "operation forbidden"):
|
|
m[:MyIndex()] = b'spam'
|
|
self.assertEqual(ba[:8], b'\0'*8)
|
|
|
|
ba = None
|
|
m = memoryview(bytearray(b'\xff'*size))
|
|
with self.assertRaisesRegex(ValueError, "operation forbidden"):
|
|
m[MyIndex():8] = b'spam'
|
|
self.assertEqual(ba[:8], b'\0'*8)
|
|
|
|
ba = None
|
|
m = memoryview(bytearray(b'\xff'*size)).cast('B', (64, 2))
|
|
with self.assertRaisesRegex(ValueError, "operation forbidden"):
|
|
m[MyIndex(), 0] = 42
|
|
self.assertEqual(ba[8:16], b'\0'*8)
|
|
ba = None
|
|
m = memoryview(bytearray(b'\xff'*size)).cast('B', (2, 64))
|
|
with self.assertRaisesRegex(ValueError, "operation forbidden"):
|
|
m[0, MyIndex()] = 42
|
|
self.assertEqual(ba[:8], b'\0'*8)
|
|
|
|
ba = None
|
|
m = memoryview(bytearray(b'\xff'*size))
|
|
with self.assertRaisesRegex(ValueError, "operation forbidden"):
|
|
m[0] = MyIndex()
|
|
self.assertEqual(ba[:8], b'\0'*8)
|
|
|
|
for fmt in 'bhilqnBHILQN':
|
|
with self.subTest(fmt=fmt):
|
|
ba = None
|
|
m = memoryview(bytearray(b'\xff'*size)).cast(fmt)
|
|
with self.assertRaisesRegex(ValueError, "operation forbidden"):
|
|
m[0] = MyIndex()
|
|
self.assertEqual(ba[:8], b'\0'*8)
|
|
|
|
for fmt in 'fd':
|
|
with self.subTest(fmt=fmt):
|
|
ba = None
|
|
m = memoryview(bytearray(b'\xff'*size)).cast(fmt)
|
|
with self.assertRaisesRegex(ValueError, "operation forbidden"):
|
|
m[0] = MyFloat()
|
|
self.assertEqual(ba[:8], b'\0'*8)
|
|
|
|
ba = None
|
|
m = memoryview(bytearray(b'\xff'*size)).cast('?')
|
|
with self.assertRaisesRegex(ValueError, "operation forbidden"):
|
|
m[0] = MyBool()
|
|
self.assertEqual(ba[:8], b'\0'*8)
|
|
|
|
if __name__ == "__main__":
|
|
unittest.main()
|