class_docstr: Tests for the `HyperbandBracket` class.
class_docstr_tok: ["Tests","for","the","`","HyperbandBracket","`","class","."]
docstr: Check if no candidate is returned by update_rungs.
docstr_tok: ["Check","if","no","candidate","is","returned","by","update_rungs","."]
code: def test_update_rungs_return_no_candidate(
      self,
      hyperband: Hyperband,
      bracket: HyperbandBracket,
      rung_1: RungDict,
  ):
      """Check if no candidate is returned by update_rungs."""
      assert bracket.owner is hyperband
  
      candidates = bracket.promote(1)
  
      assert candidates == []
  
imports: from __future__ import annotations
  import copy
  import logging
  import typing
  from typing import Any, ClassVar, Sequence
  import numpy
  import pytest
  from orion.algo.hyperband import BudgetTuple, Hyperband, HyperbandBracket, RungDict, compute_budgets
  from orion.algo.space import Fidelity, Integer, Real, Space
  from orion.core.utils.flatten import flatten
  from orion.core.worker.primary_algo import SpaceTransform
  from orion.core.worker.trial import Trial
  from orion.testing.algo import BaseAlgoTests, TestPhase
  from orion.testing.trial import compare_trials, create_trial
label_desc: Use image node_id 10 for calling the TestHyperbandBracket obj's underlying member method code with example usage: obj.test_update_rungs_return_no_candidate(hyperband, bracket, rung_1) without return types