code: def test_database_schema_and_sqlalchemy_model_are_in_sync(self):
      import airflow.models
  
      airflow.models.import_all_models()
      all_meta_data = MetaData()
      for table_name, table in airflow_base.metadata.tables.items():
          all_meta_data._add_table(table_name, table.schema, table)
  
      # create diff between database schema and SQLAlchemy model
      mctx = MigrationContext.configure(
          engine.connect(),
          opts={
              "compare_type": compare_type,
              "compare_server_default": compare_server_default,
          },
      )
      diff = compare_metadata(mctx, all_meta_data)
      # known diffs to ignore
      ignores = [
          # ignore tables created by celery
          lambda t: (
              t[0] == "remove_table" and t[1].name == "celery_taskmeta"
          ),
          lambda t: (
              t[0] == "remove_table"
              and t[1].name == "celery_tasksetmeta"
          ),
          # ignore indices created by celery
          lambda t: (t[0] == "remove_index" and t[1].name == "task_id"),
          lambda t: (
              t[0] == "remove_index" and t[1].name == "taskset_id"
          ),
          # from test_security unit test
          lambda t: (
              t[0] == "remove_table" and t[1].name == "some_model"
          ),
          # Ignore flask-session table/index
          lambda t: (t[0] == "remove_table" and t[1].name == "session"),
          lambda t: (
              t[0] == "remove_index" and t[1].name == "session_id"
          ),
          # sqlite sequence is used for autoincrementing columns created with `sqlite_autoincrement` option
          lambda t: (
              t[0] == "remove_table" and t[1].name == "sqlite_sequence"
          ),
      ]
  
      for ignore in ignores:
          diff = [d for d in diff if not ignore(d)]
  
      assert not diff, (
          "Database schema and SQLAlchemy model are not in sync: "
          + str(diff)
      )
  
imports: from __future__ import annotations
  import inspect
  import os
  import re
  from contextlib import redirect_stdout
  from io import StringIO
  from unittest import mock
  from unittest.mock import MagicMock
  import pytest
  from alembic.autogenerate import compare_metadata
  from alembic.config import Config
  from alembic.migration import MigrationContext
  from alembic.runtime.environment import EnvironmentContext
  from alembic.script import ScriptDirectory
  from sqlalchemy import MetaData, Table
  from sqlalchemy.sql import Select
  from airflow.exceptions import AirflowException
  from airflow.models import Base
  from airflow.settings import engine
  from airflow.utils.db import _get_alembic_config, check_bad_references, check_migrations, compare_server_default, compare_type, create_default_connections, create_session, downgrade, resetdb, upgradedb
  from airflow.utils.session import NEW_SESSION
label_desc: Use image node_id 1 for calling the TestDb obj's underlying member method code with example usage: obj.test_database_schema_and_sqlalchemy_model_are_in_sync() without return types