diff options
| -rw-r--r-- | src/libcore/tests/iter.rs | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/src/libcore/tests/iter.rs b/src/libcore/tests/iter.rs index 495483db555..19be1a07c5b 100644 --- a/src/libcore/tests/iter.rs +++ b/src/libcore/tests/iter.rs @@ -1250,6 +1250,23 @@ fn test_cloned() { } #[test] +fn test_cloned_side_effects() { + let mut count = 0; + { + let iter = [1, 2, 3] + .iter() + .map(|x| { + count += 1; + x + }) + .cloned() + .zip(&[1]); + for _ in iter {} + } + assert_eq!(count, 2); +} + +#[test] fn test_double_ended_map() { let xs = [1, 2, 3, 4, 5, 6]; let mut it = xs.iter().map(|&x| x * -1); |