text: """Tests for static URL modifications in :class:`.Base`."""
  
  from unittest import TestCase, mock
  
  from flask import Flask, url_for
  
  from .. import Base
  
  
  class TestAppWithStaticFiles(TestCase):
      """We are using :class:`.Base` on a Flask app."""
  
      def setUp(self):
          """Set up an app with static files."""
          self.static_url_path = '/a/static/path'
          self.host = 'foo.host'
          self.version = '0.3.2'
          self.app = Flask(__name__, static_url_path=self.static_url_path)
          self.app.config['APP_VERSION'] = self.version
          self.app.config['SERVER_NAME'] = self.host
  
      def test_base_alters_static_url(self):
          """When :class:`.Base` is applied, the static url path is changed."""
          with self.app.app_context():
              target_url = url_for('static', filename='foo.txt')
  
          self.assertEqual(
              target_url,
              f'http://{self.host}/a/static/path/foo.txt'
          )
  
          Base(self.app)
  
          with self.app.app_context():
              target_url = url_for('static', filename='foo.txt')
  
          self.assertEqual(
              target_url,
              f'http://{self.host}/static/{self.app.name}/{self.version}/foo.txt'
          )
  