From d30267bcc6ff0e418236581e7950bb2059298124 Mon Sep 17 00:00:00 2001
From: fiatcode <fiatcode@posteo.com>
Date: Wed, 18 Feb 2026 12:56:28 +0700
Subject: [PATCH] RED: Test exposing single number parsing bug

- Test expects single number '5' to return 5
- Currently returns 6 (off-by-one error)
- Expected: <5>, Actual: <6>
---
 test/string_calculator_test.dart | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/test/string_calculator_test.dart b/test/string_calculator_test.dart
index d48b197..d47aa8b 100644
--- a/test/string_calculator_test.dart
+++ b/test/string_calculator_test.dart
@@ -12,5 +12,10 @@ void main() {
     test('empty string returns 0', () {
       expect(calculator.add(''), equals(0));
     });
+
+    test('single number returns that number', () {
+      expect(calculator.add('5'), equals(5));
+      expect(calculator.add('42'), equals(42));
+    });
   });
 }