code: def test_standard_model(self):
      app = make_app(
          predictor=self.bidaf_predictor,
          field_names=["passage", "question"],
      )
      app.testing = True
      client = app.test_client()
  
      # First test the HTML
      response = client.get("/")
      data = response.get_data()
  
      assert "passage" in data
      assert "question" in data
  
      # Now test the backend
      response = post_json(client, "/predict", PAYLOAD)
      data = json.loads(response.get_data())
      assert "best_span_str" in data
      assert "span_start_logits" in data
  
imports: from __future__ import with_statement
  from __future__ import division
  from __future__ import absolute_import
  import json
  import os
  import flask
  import flask.testing
  from allennlp.common.util import JsonDict
  from allennlp.common.testing import AllenNlpTestCase
  from allennlp.models.archival import load_archive
  from allennlp.predictors import Predictor
  from allennlp.service.server_simple import make_app
  from io import open
label_desc: Use image node_id 3 for calling the TestSimpleServer obj's underlying member method code with example usage: obj.test_standard_model() without return types