cantrip 0.5.0

Practical extension methods for standard Rust collections
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26

use cantrip::{Iterable, List};

use crate::extensions::util::{TestCollection, assert_seq_equal};

pub(crate) fn test_list<'a, C>(a_source: &C, e_source: &C)
where
  C: List<i64> + TestCollection<i64> + IntoIterator<Item = i64> + Iterable<Item<'a> = &'a i64> + 'a,
{
  // first
  let a = a_source.clone();
  let e = e_source.clone();
  assert_eq!(a.first(), Some(&1));
  assert_eq!(e.first(), None);

  // last
  let a = a_source.clone();
  let e = e_source.clone();
  assert_eq!(a.last(), Some(&3));
  assert_eq!(e.last(), None);

  // repeat
  assert_seq_equal(&a.repeat(2), vec![1, 2, 3, 1, 2, 3]);
  let a = a_source.clone();
  assert_seq_equal(&a.repeat(0), vec![]);
  assert_seq_equal(&e.repeat(2), vec![]);
}