testsAndMisc/python_pkg/brother_printer/tests/test_main_entry.py

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"""Tests for brother_printer.__main__ module."""
from __future__ import annotations
import importlib
import types
from unittest.mock import MagicMock, patch
class TestMain:
def test_main_called(self) -> None:
"""Test that __main__ calls main()."""
mock_main = MagicMock()
# Create a fake brother_printer.check_brother_printer module
fake_module = types.ModuleType("brother_printer.check_brother_printer")
vars(fake_module)["main"] = mock_main
with patch.dict(
"sys.modules",
{
"brother_printer": types.ModuleType("brother_printer"),
"brother_printer.check_brother_printer": fake_module,
},
):
# Remove cached __main__ module so it gets re-imported
import sys
sys.modules.pop("python_pkg.brother_printer.__main__", None)
importlib.import_module("python_pkg.brother_printer.__main__")
mock_main.assert_called_once()