from __future__ import annotations

import unittest
from unittest.mock import patch

from src.runtime_bootstrap import compute_nofile_target, load_msg_push_exports


class RuntimeBootstrapTests(unittest.TestCase):
    def test_compute_nofile_target_respects_minimum_and_hard_limit(self) -> None:
        self.assertEqual(compute_nofile_target(1024, 524288), 65536)
        self.assertEqual(compute_nofile_target(131072, 65535), 65535)

    def test_load_msg_push_exports_falls_back_to_noop_when_backup_missing(self) -> None:
        with patch("builtins.__import__", side_effect=ModuleNotFoundError("backup")):
            funcs = load_msg_push_exports()
        self.assertEqual(len(funcs), 7)
        result = funcs[0]("demo")
        self.assertTrue(result["disabled"])


if __name__ == "__main__":
    unittest.main()