code: def test_expression(self):
      expr = select(users).select_from(users.join(addresses)).limit(5)
      re_expr = serializer.loads(
          serializer.dumps(expr, -1), users.metadata, None
      )
      eq_(str(expr), str(re_expr))
      eq_(
          Session.connection().execute(re_expr).fetchall(),
          [(7, "jack"), (8, "ed"), (8, "ed"), (8, "ed"), (9, "fred")],
      )
  
imports: from sqlalchemy import desc
  from sqlalchemy import ForeignKey
  from sqlalchemy import func
  from sqlalchemy import Integer
  from sqlalchemy import join
  from sqlalchemy import literal_column
  from sqlalchemy import MetaData
  from sqlalchemy import select
  from sqlalchemy import String
  from sqlalchemy import testing
  from sqlalchemy.ext import serializer
  from sqlalchemy.orm import aliased
  from sqlalchemy.orm import class_mapper
  from sqlalchemy.orm import column_property
  from sqlalchemy.orm import configure_mappers
  from sqlalchemy.orm import joinedload
  from sqlalchemy.orm import relationship
  from sqlalchemy.orm import scoped_session
  from sqlalchemy.orm import sessionmaker
  from sqlalchemy.testing import AssertsCompiledSQL
  from sqlalchemy.testing import eq_
  from sqlalchemy.testing import fixtures
  from sqlalchemy.testing.entities import ComparableEntity
  from sqlalchemy.testing.schema import Column
  from sqlalchemy.testing.schema import Table
label_desc: Use image node_id 8 for calling the SerializeTest obj's underlying member method code with example usage: obj.test_expression() without return types