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Add tests for Iterator::copied()

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This commit is contained in:
Konrad Borowski 2018-12-05 14:52:38 +01:00
parent fcc46040a9
commit fe45e9a886
2 changed files with 18 additions and 0 deletions
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17
src/libcore/tests/iter.rs
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@ -1232,6 +1232,23 @@ fn test_rev() {
vec![16, 14, 12, 10, 8, 6]);
}
#[test]
fn test_copied() {
let xs = [2, 4, 6, 8];
let mut it = xs.iter().copied();
assert_eq!(it.len(), 4);
assert_eq!(it.next(), Some(2));
assert_eq!(it.len(), 3);
assert_eq!(it.next(), Some(4));
assert_eq!(it.len(), 2);
assert_eq!(it.next_back(), Some(8));
assert_eq!(it.len(), 1);
assert_eq!(it.next_back(), Some(6));
assert_eq!(it.len(), 0);
assert_eq!(it.next_back(), None);
}
#[test]
fn test_cloned() {
let xs = [2, 4, 6, 8];