From aeae9aa51e469a8d9838421ae6781481ef47b5ee Mon Sep 17 00:00:00 2001
From: zypeh <zypeh@users.noreply.github.com>
Date: Thu, 25 Aug 2022 21:43:22 +0800
Subject: [PATCH] zigzag zagzig

---
 crates/flat/tests/zigzag_test.rs | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/crates/flat/tests/zigzag_test.rs b/crates/flat/tests/zigzag_test.rs
index 198cc9d7..3ef75dd4 100644
--- a/crates/flat/tests/zigzag_test.rs
+++ b/crates/flat/tests/zigzag_test.rs
@@ -15,4 +15,11 @@ mod test {
         let converted_i = to_isize(u);
         converted_i == i
     }
+
+    #[quickcheck]
+    fn zagzig(u: usize) -> bool {
+        let i = to_isize(u);
+        let converted_u = to_usize(i);
+        converted_u == u
+    }
 }