code: def test_empty_url_defaults(app, client):
      bp = flask.Blueprint("bp", __name__)
  
      @bp.route("/", defaults={"page": 1})
      @bp.route("/page/<int:page>")
      def something(page):
          return str(page)
  
      app.register_blueprint(bp)
  
      assert client.get("/").data == b"1"
      assert client.get("/page/2").data == b"2"
  
imports: import pytest
  from jinja2 import TemplateNotFound
  from werkzeug.http import parse_cache_control_header
  import flask
label_desc: Use image node_id 13 for calling a global function with example usage: test_empty_url_defaults(app, client) and returns: str