class_docstr: Test Trial object and class.
docstr: Initialize empty trial.
docstr_tok: ["Initialize","empty","trial","."]
code: def test_init_empty(self):
      """Initialize empty trial."""
      t = Trial()
      assert t.experiment is None
      assert t.status == "new"
      assert t.worker is None
      assert t.submit_time is None
      assert t.start_time is None
      assert t.end_time is None
      assert t.results == []
      assert t.params == {}
      assert t.exp_working_dir is None
  
imports: import copy
  import datetime
  import os
  import warnings
  import bson
  import numpy
  import pytest
  from orion.core.worker.trial import Trial
label_desc: Use image node_id 1 for calling the TestTrial obj's underlying member method code with example usage: obj.test_init_empty() without return types