Test that calls to the cached function with different arguments can occur concurrently and do not wait for a shared lock.

Test the repr of `MemoryObjectItemReceiver`. Since when `item` is not set, the default dataclass repr raises an AttributeError.

Test that CancelledErrors are filtered out of nested exception groups containing other exceptions.

Test that CancelledErrors are filtered out of nested exception groups from task groups.

Regression test for #1111. When a task group is entered but never exited (e.g. it is abandoned because the task owning it finishes without un

Test that worker process creation won't fail if the detected path to the `__main__` module doesn't exist. Regression test for #696.

Test that partial() can be used to pass keyword arguments.

Test that print() won't interfere with parent-worker communication.

Regression test for #669. Ensures that open_process.__aexit__() closes standard streams when cancelled. Also ensures that process.std{in

Regression test for #669. Ensures that open_process.__aexit__() doesn't leave behind an orphan process when cancelled.

Test that `cwd` is successfully passed to the subprocess implementation

Test that `env` is successfully passed to the subprocess implementation

Test that start_new_session is successfully passed to the subprocess implementation.

Test that the anyio marker added programmatically via pytest_collection_modifyitems causes the test to be run (regression test for issue #422).

Ensure that all public properties and methods are available on the async Path class.

Test that when a task raises a BaseException, it does not trigger additional exceptions when trying to close the portal.