Auto merge of #25817 - XMPPwocky:once_cleanedup, r=alexcrichton

Closes #24443.

2 files changed, 15 insertions, 0 deletions

diff --git a/src/libcoretest/iter.rs b/src/libcoretest/iter.rs
index 0415c75aa52..8e817bcbc2a 100644
--- a/src/libcoretest/iter.rs
+++ b/src/libcoretest/iter.rs
@@ -1096,6 +1096,19 @@ fn test_fuse_count() {
     // Can't check len now because count consumes.
 }
 
+#[test]
+fn test_once() {
+    let mut it = once(42);
+    assert_eq!(it.next(), Some(42));
+    assert_eq!(it.next(), None);
+}
+
+#[test]
+fn test_empty() {
+    let mut it = empty::<i32>();
+    assert_eq!(it.next(), None);
+}
+
 #[bench]
 fn bench_rposition(b: &mut Bencher) {
     let it: Vec<usize> = (0..300).collect();
diff --git a/src/libcoretest/lib.rs b/src/libcoretest/lib.rs
index 6ec3f5b7869..deef26022f7 100644
--- a/src/libcoretest/lib.rs
+++ b/src/libcoretest/lib.rs
@@ -26,6 +26,8 @@
 #![feature(slice_patterns)]
 #![feature(float_from_str_radix)]
 #![feature(cell_extras)]
+#![feature(iter_empty)]
+#![feature(iter_once)]
 
 extern crate core;
 extern crate test;