//! Shared test utilities for config module tests.
usestd::sync::Mutex;/// Mutex to serialize environment variable tests and prevent race conditions.
pubstaticENV_MUTEX:Mutex<()>=Mutex::new(());/// Clean up environment variables used by vipune config.
pubfncleanup_env_vars(vars:&[&str]){for var in vars {unsafe{std::env::remove_var(var);}}}