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import pytest
from __pypy__ import PickleBuffer
def test_basics():
pb = PickleBuffer(b"foo")
assert b"foo" == bytes(pb)
with memoryview(pb) as m:
assert m.readonly
pb = PickleBuffer(bytearray(b"foo"))
assert bytes(pb) == b"foo"
with memoryview(pb) as m:
assert not m.readonly
m[0] = ord("b")
assert bytes(pb) == b"boo"
def test_relase():
pb = PickleBuffer(b"foo")
pb.release()
with pytest.raises(ValueError):
memoryview(pb)
pb.release()
def test_weakref():
import _weakref, gc
pb = PickleBuffer(b"foo")
w = _weakref.ref(pb)
assert w() is pb
pb = None
gc.collect()
assert w() is None
def test_memoryobject_picklebuffer_gives_obj_back():
b = b"abc"
pb = PickleBuffer(b)
m = memoryview(pb)
assert m.obj is b
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