1 use itertools::Itertools; 2 3 #[test] specialization_intersperse()4fn specialization_intersperse() { 5 let mut iter = (1..2).intersperse(0); 6 iter.clone().for_each(|x| assert_eq!(Some(x), iter.next())); 7 8 let mut iter = (1..3).intersperse(0); 9 iter.clone().for_each(|x| assert_eq!(Some(x), iter.next())); 10 11 let mut iter = (1..4).intersperse(0); 12 iter.clone().for_each(|x| assert_eq!(Some(x), iter.next())); 13 } 14