some fix

tests/system_tests/test_system.py

@@ -0,0 +1,30 @@
+import _io
+from unittest.mock import patch, MagicMock
+import unittest
+import io
+
+from argenta.app import App
+from argenta.command import Command
+from argenta.router import Router
+
+
+
+class TestSystem(unittest.TestCase):
+    @patch("builtins.input", side_effect=["test", "q"])
+    @patch("sys.stdout", new_callable=io.StringIO)
+    def test_run_shell_output(self, mock_stdout: _io.StringIO, magick_mock: MagicMock):
+        router = Router()
+
+        @router.command(Command('test'))
+        def test():
+            print('test command')
+
+        app = App()
+        app.include_router(router)
+        app.start_polling()
+
+        output = mock_stdout.getvalue()
+
+        self.assertIn('test command', output)
+
+