def test_init_buffer_mutable_from_immutable(self):
a = memoryview(b'01234567'
b'456789ab'
b'89abcdef').cast('b', shape=[3, 8])
with self.assertRaisesRegex(BufferError,
"underlying buffer is not writable"):
b = containers.MutableStridedArrayView2D(a)
def test_init_buffer_mutable(self):
a = bytearray(b'01234567' b'456789ab' b'89abcdef')
b = containers.MutableStridedArrayView2D(
memoryview(a).cast('b', shape=[3, 8]))
b[0, 7] = '!'
b[1, 7] = '!'
b[2, 7] = '!'
self.assertEqual(b[0][7], '!')
self.assertEqual(bytes(b), b'0123456!' b'456789a!' b'89abcde!')
def test_init(self):
a = containers.StridedArrayView2D()
b = containers.MutableStridedArrayView2D()
self.assertIs(a.owner, None)
self.assertIs(b.owner, None)
self.assertEqual(len(a), 0)
self.assertEqual(len(b), 0)
self.assertEqual(bytes(a), b'')
self.assertEqual(bytes(b), b'')
self.assertEqual(a.size, (0, 0))
self.assertEqual(b.size, (0, 0))
self.assertEqual(a.stride, (0, 0))
self.assertEqual(b.stride, (0, 0))
self.assertEqual(a.dimensions, 2)
self.assertEqual(b.dimensions, 2)