diff options
Diffstat (limited to 'library/core/tests/iter/adapters/copied.rs')
-rw-r--r-- | library/core/tests/iter/adapters/copied.rs | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/library/core/tests/iter/adapters/copied.rs b/library/core/tests/iter/adapters/copied.rs new file mode 100644 index 000000000..b12f2035d --- /dev/null +++ b/library/core/tests/iter/adapters/copied.rs @@ -0,0 +1,18 @@ +use core::iter::*; + +#[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); +} |