From 0d5ce2fa0624d46d7673506c76534dc840b755cc Mon Sep 17 00:00:00 2001
From: a14m <a14m@pm.me>
Date: Thu, 1 Apr 2021 23:47:57 +0200
Subject: Add the testing of is_positive

---
 CLI/rust/src/game_of_life/opts.rs | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/CLI/rust/src/game_of_life/opts.rs b/CLI/rust/src/game_of_life/opts.rs
index 5e52715..a0ed34b 100644
--- a/CLI/rust/src/game_of_life/opts.rs
+++ b/CLI/rust/src/game_of_life/opts.rs
@@ -46,4 +46,24 @@ pub(crate) mod validators {
             Err(e) => Err(e.to_string()),
         }
     }
+
+    #[cfg(test)]
+    mod is_positive {
+        use super::*;
+
+        #[test]
+        fn positive_value() {
+            assert!(is_positive("1337").is_ok());
+        }
+
+        #[test]
+        fn negative_value() {
+            assert!(is_positive("-1337").is_err());
+        }
+
+        #[test]
+        fn string_value() {
+            assert!(is_positive("not a number").is_err());
+        }
+    }
 }
-- 
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