def test_set_pid_valid_path():
daemon = Daemon('/fake/path.pid')
m_open = mock.mock_open()
with mock.patch('builtins.open', m_open, create=True):
daemon.pid = 123
m_open.assert_called_once_with('/fake/path.pid', 'w+')
def test_set_pid_invalid_path(_):
daemon = Daemon('/fake/path.pid')
with pytest.raises(DaemonException):
daemon.pid = 123
