code: def test_db(
      sqlalchemy_uri: str, raw_engine_kwargs: str | None = None
  ) -> None:
      """
      Run a series of tests against an analytical database.
  
      This command tests:
  
        1. The Superset DB engine spec.
        2. The SQLAlchemy dialect.
        3. The database connectivity and performance.
  
      It's useful for people developing DB engine specs and/or SQLAlchemy dialects, and
      also to test new versions of DB API 2.0 drivers.
  
      TODO:
  
        - implement SSH tunneling
        - implement server certificates
  
      """
      console = Console()
      console.clear()
  
      console.print(
          "[bold]Collecting additional connection information..."
      )
      engine_kwargs = collect_connection_info(
          console, sqlalchemy_uri, raw_engine_kwargs
      )
  
      console.print("[bold]\nChecking for a DB engine spec...")
      test_db_engine_spec(console, sqlalchemy_uri)
  
      console.print("[bold]\nTesting the SQLAlchemy dialect...")
      engine = test_sqlalchemy_dialect(
          console, sqlalchemy_uri, engine_kwargs
      )
  
      console.print("[bold]\nTesting the database connectivity...")
      test_database_connectivity(console, engine)
  
imports: from __future__ import annotations
  import sys
  from collections import defaultdict
  from datetime import datetime
  from typing import Any, Callable
  import click
  import yaml
  from rich.console import Console
  from sqlalchemy import Column, create_engine, DateTime, ForeignKey, insert, Integer, MetaData, select, String, Table
  from sqlalchemy.engine import Engine
  from sqlalchemy.exc import NoSuchModuleError
  from superset.databases.utils import make_url_safe
  from superset.db_engine_specs import load_engine_specs
  from superset.db_engine_specs.base import BaseEngineSpec
  from superset.db_engine_specs.lib import ADVANCED_FEATURES, BASIC_FEATURES, DATABASE_DETAILS, diagnose, LIMIT_METHODS, NICE_TO_HAVE_FEATURES
label_desc: Use image node_id 2 for calling a global function with example usage: test_db(sqlalchemy_uri, raw_engine_kwargs) without return types