From dcd87287bf1eb91a1c1656c645c8608ddd0cf607 Mon Sep 17 00:00:00 2001
From: Remco Bloemen <remco@0x.org>
Date: Thu, 19 Nov 2020 09:27:34 -0800
Subject: [PATCH] Add DoubleEndedIterator test

---
 tests/core/matrix.rs | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/tests/core/matrix.rs b/tests/core/matrix.rs
index ed7b26d2..6b248593 100644
--- a/tests/core/matrix.rs
+++ b/tests/core/matrix.rs
@@ -21,6 +21,15 @@ fn iter() {
     assert_eq!(*it.next().unwrap(), 6.0);
     assert!(it.next().is_none());
 
+    let mut it = a.iter();
+    assert_eq!(*it.next().unwrap(), 1.0);
+    assert_eq!(*it.next_back().unwrap(), 6.0);
+    assert_eq!(*it.next_back().unwrap(), 3.0);
+    assert_eq!(*it.next_back().unwrap(), 5.0);
+    assert_eq!(*it.next().unwrap(), 4.0);
+    assert_eq!(*it.next().unwrap(), 2.0);
+    assert!(it.next().is_none());
+
     let row = a.row(0);
     let mut it = row.iter();
     assert_eq!(*it.next().unwrap(), 1.0);