Vakyartha documentation

2001
2002 /// A child being spawned holds a duplicate of every open descriptor
2003 /// until it execs; the duplicate here stands in for one.
2004 #[test]
2005 fn the_lock_lasts_exactly_as_long_as_the_handle() {
2006 let dir = tempfile::tempdir().unwrap();
2007 let path = dir.path().join("session.jsonl");
2008 std::fs::write(&path, "").unwrap();
2009
2010 let log = SessionLog::open(path.clone()).unwrap();
2011 assert!(matches!(
2012 SessionLog::open(path.clone()),
2013 Err(SessionError::Locked(_))
2014 ));
2015
2016 let duplicate = log.file.file.try_clone().unwrap();
2017 drop(log);
2018 SessionLog::open(path).expect("the dropped handle's lock stayed with a duplicate");
2019 drop(duplicate);
2020 }
2021}
2022