Marcos Paulo
60 lines
2.1 KiB
Rust
60 lines
2.1 KiB
Rust
//! The vault lock file (SPEC §4.2).
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mod common;
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use std::fs;
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use notescraft_vault::{Error, Vault};
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/// A pid no live process can have on Linux or macOS.
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const DEAD_PID: u32 = 4_294_967_294;
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#[test]
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fn opening_creates_the_private_state_folder_and_the_lock() {
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let (dir, vault) = common::vault("lock");
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let lock = dir.path().join(".notescraft/lock");
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assert!(vault.root().is_dir());
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assert!(lock.is_file());
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let content = fs::read_to_string(&lock).unwrap();
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assert_eq!(content.split_whitespace().next().unwrap(), std::process::id().to_string());
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assert_eq!(vault.root(), fs::canonicalize(dir.path()).unwrap());
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}
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#[test]
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fn a_second_instance_is_locked_out() {
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let (dir, _vault) = common::vault("locked");
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let err = Vault::open(dir.path()).expect_err("second writer");
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assert!(matches!(err, Error::Locked { pid } if pid == std::process::id()), "{err:?}");
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}
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#[test]
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fn a_lock_owned_by_a_dead_process_is_taken_over() {
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let dir = common::TempDir::new("takeover");
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fs::create_dir_all(dir.path().join(".notescraft")).unwrap();
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fs::write(dir.path().join(".notescraft/lock"), format!("{DEAD_PID} 1700000000")).unwrap();
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let vault = Vault::open(dir.path()).expect("stale lock must be taken over");
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let content = fs::read_to_string(dir.path().join(".notescraft/lock")).unwrap();
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assert_eq!(content.split_whitespace().next().unwrap(), std::process::id().to_string());
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drop(vault);
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}
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#[test]
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fn dropping_the_vault_releases_the_lock() {
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let dir = common::TempDir::new("release");
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drop(Vault::open(dir.path()).unwrap());
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assert!(!dir.path().join(".notescraft/lock").exists());
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// The lock is free again, and a second take-over works.
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drop(Vault::open(dir.path()).expect("lock released"));
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}
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#[test]
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fn read_only_open_does_not_take_the_lock() {
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let dir = common::TempDir::new("ro-lock");
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let read_only = Vault::open_read_only(dir.path()).unwrap();
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assert!(!dir.path().join(".notescraft/lock").exists());
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let writer = Vault::open(dir.path()).expect("read-only opens leave the lock free");
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assert!(writer.root().is_dir());
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drop(read_only);
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}
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