def test_write_response__when_disconnected(self): i = ICAPProtocol(False) with patch('icap.asyncio.Serializer') as mock_serializer: i.write_response(MagicMock(), MagicMock()) assert not mock_serializer.mock_calls i.connection_made(MagicMock()) with patch('icap.asyncio.Serializer') as mock_serializer: i.write_response(MagicMock(), MagicMock()) assert mock_serializer.mock_calls