class_docstr: Tests trials/:experiment_name/:trial_id
docstr: Tests that an unknown experiment returns a not found error
docstr_tok: ["Tests","that","an","unknown","experiment","returns","a","not","found","error"]
code: def test_unknown_experiment(self, client, ephemeral_storage):
      """Tests that an unknown experiment returns a not found error"""
      response = client.simulate_get(
          "/trials/unknown-experiment/a-trial"
      )
  
      assert response.status == "404 Not Found"
      assert response.json == {
          "title": "Experiment not found",
          "description": 'Experiment "unknown-experiment" does not exist',
      }
  
imports: import copy
  import datetime
  import random
  import falcon
  from orion.core.io import experiment_builder
  from orion.core.worker.trial import Trial
label_desc: Use image node_id 1 for calling the TestTrialItem obj's underlying member method code with example usage: obj.test_unknown_experiment(client, ephemeral_storage) without return types