code: def test_start_experiment(self):
      with self.get_db_provider("test_config_http_client.yaml") as hp:
          experiment_tuple = get_test_experiment()
  
          hp.add_experiment(experiment_tuple[0])
          hp.start_experiment(experiment_tuple[0])
  
          experiment = hp.get_experiment(experiment_tuple[1])
  
          self.assertTrue(experiment.status == "running")
  
          self.assertEquals(experiment.key, experiment_tuple[0].key)
          self.assertEquals(
              experiment.filename, experiment_tuple[0].filename
          )
          self.assertEquals(experiment.args, experiment_tuple[0].args)
  
          hp.finish_experiment(experiment_tuple[0])
          hp.delete_experiment(experiment_tuple[1])
  
file_path: studio/tests/http_provider_hosted_test.py
imports: import unittest
  import os
  import tempfile
  import uuid
  from studio import model
  from model_test import get_test_experiment
label_desc: Use image node_id 3 for calling the HTTPProviderHostedTest obj's underlying member method code with example usage: obj.test_start_experiment() without return types