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test: add is_superset test cases for BTreeSet

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This commit is contained in:
Keita Nonaka 2022-04-13 22:09:03 -07:00
parent f387c930ee
commit 21d3f8444a
1 changed files with 36 additions and 0 deletions
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36
library/alloc/src/collections/btree/set/tests.rs
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@ -319,6 +319,42 @@ fn test_is_subset() {
assert_eq!(is_subset(&[99, 100], &large), false);
}
#[test]
fn test_is_superset() {
fn is_superset(a: &[i32], b: &[i32]) -> bool {
let set_a = BTreeSet::from_iter(a.iter());
let set_b = BTreeSet::from_iter(b.iter());
set_a.is_superset(&set_b)
}
assert_eq!(is_superset(&[], &[]), true);
assert_eq!(is_superset(&[], &[1, 2]), false);
assert_eq!(is_superset(&[0], &[1, 2]), false);
assert_eq!(is_superset(&[1], &[1, 2]), false);
assert_eq!(is_superset(&[4], &[1, 2]), false);
assert_eq!(is_superset(&[1, 4], &[1, 2]), false);
assert_eq!(is_superset(&[1, 2], &[1, 2]), true);
assert_eq!(is_superset(&[1, 2, 3], &[1, 3]), true);
assert_eq!(is_superset(&[1, 2, 3], &[]), true);
assert_eq!(is_superset(&[-1, 1, 2, 3], &[-1, 3]), true);
if cfg!(miri) {
// Miri is too slow
return;
}
let large = Vec::from_iter(0..100);
assert_eq!(is_superset(&[], &large), false);
assert_eq!(is_superset(&large, &[]), true);
assert_eq!(is_superset(&large, &[1]), true);
assert_eq!(is_superset(&large, &[50, 99]), true);
assert_eq!(is_superset(&large, &[100]), false);
assert_eq!(is_superset(&large, &[0, 99]), true);
assert_eq!(is_superset(&[-1], &large), false);
assert_eq!(is_superset(&[0], &large), false);
assert_eq!(is_superset(&[99, 100], &large), false);
}
#[test]
fn test_retain() {
let mut set = BTreeSet::from([1, 2, 3, 4, 5, 6]);