docstr: Thumbnails: Simple get async chart not found
docstr_tok: ["Thumbnails",":","Simple","get","async","chart","not","found"]
code: def test_get_async_chart_notfound(self):
      """
      Thumbnails: Simple get async chart not found
      """
      max_id = db.session.query(func.max(Slice.id)).scalar()
      self.login(username="admin")
      uri = f"api/v1/chart/{max_id + 1}/thumbnail/1234/"
      rv = self.client.get(uri)
      self.assertEqual(rv.status_code, 404)
  
imports: import json
  import urllib.request
  from io import BytesIO
  from unittest import skipUnless
  from unittest.mock import ANY, call, MagicMock, patch
  import pytest
  from flask_testing import LiveServerTestCase
  from sqlalchemy.sql import func
  from superset import db, is_feature_enabled, security_manager
  from superset.extensions import machine_auth_provider_factory
  from superset.models.dashboard import Dashboard
  from superset.models.slice import Slice
  from superset.tasks.types import ExecutorType
  from superset.utils.screenshots import ChartScreenshot, DashboardScreenshot
  from superset.utils.urls import get_url_path
  from superset.utils.webdriver import WebDriverSelenium
  from tests.integration_tests.conftest import with_feature_flags
  from tests.integration_tests.fixtures.birth_names_dashboard import load_birth_names_dashboard_with_slices, load_birth_names_data
  from tests.integration_tests.test_app import app
  from .base_tests import SupersetTestCase
label_desc: Use image node_id 10 for calling the TestThumbnails obj's underlying member method code with example usage: obj.test_get_async_chart_notfound() without return types