patch_open_code doesn't seem to work in Python 3.12 #892
Description
I have a program that imports Python modules dynamically and I use patch_open_code in my tests. I tried running it under Python 3.12 just for fun and found the tests are not working.
For example, this works in e.g. 3.11:
import importlib.util
from contextlib import redirect_stdout
from io import StringIO
import pytest
from pyfakefs.fake_filesystem_unittest import Patcher, PatchMode
@pytest.fixture
def fffs():
with Patcher(patch_open_code=PatchMode.AUTO) as patcher:
yield patcher.fs
def import_foo():
spec = importlib.util.spec_from_file_location("bar", "/foo/bar.py")
mod = importlib.util.module_from_spec(spec)
spec.loader.exec_module(mod)
def test_foo(fffs):
fffs.create_file("/foo/bar.py", contents="print('hello')")
with redirect_stdout(StringIO()) as stdout:
import_foo()
assert stdout.getvalue() == "hello\n"The test passes alright. In 3.12, however, I'm getting:
__________________________________ test_foo ___________________________________
fffs = <pyfakefs.fake_filesystem.FakeFilesystem object at 0xBAADF00D>
def test_foo(fffs):
fffs.create_file("/foo/bar.py", contents="print('hello')")
with redirect_stdout(StringIO()) as stdout:
> import_foo()
/test_ffs.py:24:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
/test_ffs.py:18: in import_foo
spec.loader.exec_module(mod)
<frozen importlib._bootstrap_external>:990: in exec_module
???
<frozen importlib._bootstrap_external>:1127: in get_code
???
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
self = <_frozen_importlib_external.SourceFileLoader object at 0xDEADC0DE>, path = '/foo/bar.py'
> ???
E FileNotFoundError: [Errno 2] No such file or directory: '/foo/bar.py'
<frozen importlib._bootstrap_external>:1185: FileNotFoundError
Tested under Python 3.11.6 and 3.12.0, respectively, with pytest 7.4.0 and pyfakefs 5.2.4.