code: def test_int_serializer():
      s = IntSerializer()
      assert s.serialize(42, 2) == b"*\x00"
      assert s.deserialize(b"*\x00") == 42
      assert repr(s) == "IntSerializer()"
  
file_path: bplustree/tests/test_serializer.py
imports: from datetime import datetime, timezone
  from unittest import mock
  import uuid
  import pytest
  from bplustree.serializer import IntSerializer, StrSerializer, UUIDSerializer, DatetimeUTCSerializer
label_desc: Use image node_id 1 for calling a global function with example usage: test_int_serializer() without return types