//! Random data generators for testing.
userand::distributions::Alphanumeric;userand::{thread_rng, Rng};/// Returns a random alphanumeric string of a certain size.
////// It is useful for generating random names, IDs, etc for testing.
pubfnstring(size:usize)-> String{thread_rng().sample_iter(&Alphanumeric).take(size).map(char::from).collect()}