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_trial(self, client, ephemeral_storage):
      """Tests that an unknown experiment returns a not found error"""
      storage = ephemeral_storage.storage
  
      add_experiment(storage, name="a", version=1, _id=1)
  
      response = client.simulate_get("/trials/a/unknown-trial")
  
      assert response.status == "404 Not Found"
      assert response.json == {
          "title": "Trial not found",
          "description": 'Trial "unknown-trial" 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 2 for calling the TestTrialItem obj's underlying member method code with example usage: obj.test_unknown_trial(client, ephemeral_storage) without return types