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);
+}