Function with_isolated_cli_env

crates/openshell-cli/src/completers.rs:162–174

(tmp: &std::path::Path, f: F)

    use temp_env::with_vars;

    fn with_isolated_cli_env<F: FnOnce()>(tmp: &std::path::Path, f: F) {
        let _guard = TEST_ENV_LOCK
            .lock()
            .unwrap_or_else(std::sync::PoisonError::into_inner);
        let tmp = tmp.to_string_lossy().into_owned();
        with_vars(
            [
                ("XDG_CONFIG_HOME", Some(tmp.as_str())),
                ("OPENSHELL_GATEWAY", None::<&str>),
            ],
            f,
        );
    }

    #[test]
    fn gateway_completer_returns_empty_when_no_config() {