From 8d40ca91fc474ffef9670e01d7f92ff758f45c82 Mon Sep 17 00:00:00 2001
From: Zachary S <zasample18+github@gmail.com>
Date: Wed, 22 Mar 2023 21:33:16 -0500
Subject: [PATCH] Added test that `CircularTupleWindows` clone works correctly.

---
 tests/tuples.rs | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/tests/tuples.rs b/tests/tuples.rs
index 9fc8b3cc7..c1aa156e0 100644
--- a/tests/tuples.rs
+++ b/tests/tuples.rs
@@ -61,6 +61,30 @@ fn tuple_windows() {
     assert_eq!(None, iter.next());
 }
 
+#[test]
+fn circular_tuple_windows() {
+    let v = [1, 2, 3, 4, 5];
+
+    let mut iter = v.iter().cloned().circular_tuple_windows();
+    assert_eq!(Some((1,)), iter.next());
+    assert_eq!(Some((2,)), iter.next());
+    assert_eq!(Some((3,)), iter.next());
+
+    let mut iter = v.iter().cloned().circular_tuple_windows();
+    assert_eq!(Some((1, 2, 3, 4)), iter.next());
+    assert_eq!(Some((2, 3, 4, 5)), iter.next());
+    // Testing impl Clone for CircularTupleWindows
+    let mut iter2 = iter.clone();
+    assert_eq!(Some((3, 4, 5, 1)), iter.next());
+    assert_eq!(Some((3, 4, 5, 1)), iter2.next());
+    assert_eq!(Some((4, 5, 1, 2)), iter.next());
+    assert_eq!(Some((4, 5, 1, 2)), iter2.next());
+    assert_eq!(Some((5, 1, 2, 3)), iter.next());
+    assert_eq!(Some((5, 1, 2, 3)), iter2.next());
+    assert_eq!(None, iter.next());
+    assert_eq!(None, iter2.next());
+}
+
 #[test]
 fn next_tuple() {
     let v = [1, 2, 3, 4, 5];