stty: test parse_saved_state

Author: Rudxain

src/uu/stty/src/stty.rs

@@ -1428,6 +1428,18 @@ mod tests {
         assert_eq!(parse_rows_cols("65537"), Some(1)); // wraps to 1
     }
 
+    #[test]
+    fn test_sane_parse_saved_state() {
+        let result = parse_saved_state("00:01:ff:7f");
+        assert_eq!(&result, Some(&[0, 1, 255, 127]));
+    }
+
+    #[test]
+    fn test_parse_saved_state_no_plus() {
+        let result = parse_saved_state("+00:+01:+ff:+7f");
+        assert_eq!(&result, None);
+    }
+
     // Sane control character defaults
     #[test]
     fn test_get_sane_control_char_values() {