Function diesel_factories::sequence

pub fn sequence<T, F>(f: F) -> T where
    F: Fn(usize) -> T, 

Utility function for generating unique ids or strings in factories. Each time sequence gets called, the closure will receive a different number.

use diesel_factories::sequence;

assert_ne!(
    sequence(|i| format!("unique-string-{}", i)),
    sequence(|i| format!("unique-string-{}", i)),
);