You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: panic_safely.rs
    path of file: ./repos/rust-analyzer/crates/salsa/tests
    
    the code of the file until where you have to start completion: use salsa::{Database, ParallelDatabase, Snapshot};
use std::panic::{self, AssertUnwindSafe};
use std::sync::atomic::{AtomicU32, Ordering::SeqCst};

#[salsa::query_group(PanicSafelyStruct)]
trait PanicSafelyDatabase: salsa::Database {
    #[salsa::input]
    fn one(&self
    
fn should_panic_safely() {
    let mut db = DatabaseStruct::default();
    db.set_one(0);

    // Invoke `db.panic_safely() without having set `db.one`. `db.one` will
    // return 0 and we should catch the panic.
    let result = panic::catch_unwind(AssertUnwindSafe({
        let db = db.snapshot();
        move || db.panic_safely()
    }));
    assert!(result.is_err());

    // Set `db.one` to 1 and assert ok
    db.set_one(1);
    let result = panic::catch_unwind(AssertUnwindSafe(|| db.panic_safely()));
    assert!(result.is_ok());

    // Check, that memoized outer is not invalidated by a panic
    {
        assert_eq!(OUTER_CALLS.load(SeqCst), 0);
        db.outer();
        assert_eq!(OUTER_CALLS.load(SeqCst), 1);

        db.set_one(0);
        let result = panic::catch_unwind(AssertUnwindSafe(|| db.outer()));
        assert!(result.is_err());
        assert_eq!(OUTER_CALLS.load(SeqCst), 1);

        db.set_one(1);
        db.outer();
        assert_eq!(OUTER_CALLS.load(SeqCst), 2);
    }
}