From 66d42bfd1d4bbdc5f6f26be41487cb27e16c7799 Mon Sep 17 00:00:00 2001
From: realaravinth <realaravinth@batsense.net>
Date: Tue, 29 Jun 2021 19:02:54 +0530
Subject: [PATCH] additional test case

---
 src/filters/user_case_mapped.rs | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/filters/user_case_mapped.rs b/src/filters/user_case_mapped.rs
index 8a905b7..ac70068 100644
--- a/src/filters/user_case_mapped.rs
+++ b/src/filters/user_case_mapped.rs
@@ -23,7 +23,9 @@ mod tests {
     fn test_usercase_mapped() {
         let legal = "\u{0065}";
         let illegal = "\u{0000}";
+        let illegal2 = "@";
         assert_eq!(filter(legal), Ok(()));
         assert_eq!(filter(illegal), Err(CredsError::UsernameCaseMappedError));
+        assert_eq!(filter(illegal2), Err(CredsError::UsernameCaseMappedError));
     }
 }