code: def test_get_database_no_argument(datasette):
      # Returns the first available database:
      db = datasette.get_database()
      assert "fixtures" == db.name
  
file_path: datasette/tests/test_internals_datasette.py
imports: import dataclasses
  from datasette import Forbidden, Context
  from datasette.app import Datasette, Database
  from itsdangerous import BadSignature
  import pytest
  from typing import Optional
label_desc: Use image node_id 3 for calling a global function with example usage: test_get_database_no_argument(datasette) without return types