new_contents: import pytest
  from flask import Flask
  
  from sipa.blueprints.documents import StaticFiles
  
  
  @pytest.fixture(scope="module")
  def documents_dir(tmp_path_factory: pytest.TempPathFactory):
      return tmp_path_factory.mktemp("documents")
  
  
  @pytest.fixture(scope="module")
  def static_file(documents_dir):
      path = documents_dir / "test.txt"
      with open(path, "w") as f:
          f.write("Test!")
      return path
  
  
  @pytest.fixture(scope="module")
  def app(static_file, documents_dir):
      app = Flask("test")
      app.add_url_rule(
          "/documents/<path:filename>",
          view_func=StaticFiles.as_view("show_document", documents_dir),
      )
      app.config.update(
          {
              "TESTING": True,
          }
      )
      return app
  
  
  def test_static_view(app: Flask):
      with app.test_client() as c:
          resp = c.get("/documents/test.txt")
      assert resp.text == "Test!"
  
subject: Add reproduction test for #445