class_docstr: Test Trial object and class.
docstr: Check property `Trial.execution_interval`.
docstr_tok: ["Check","property","`","Trial.execution_interval","`","."]
code: def test_execution_interval_property(self, trial_config):
      """Check property `Trial.execution_interval`."""
      t = Trial(**trial_config)
      assert t.execution_interval == (150, "2017-11-23T00:00:00")
  
      t = Trial()
      assert t.execution_interval 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 36 for calling the TestTrial obj's underlying member method code with example usage: obj.test_execution_interval_property(trial_config) without return types