class_docstr: Base tests for `ExperimentIdMiddleware`.
class_docstr_tok: ["Base","tests","for","`","ExperimentIdMiddleware","`","."]
code: def setUp(self):
      super().setUp()
  
      self.app = self._create_app()
      self.server = werkzeug_test.Client(
          self.app, werkzeug.wrappers.Response
      )
  
imports: import json
  import werkzeug
  from werkzeug import test
  from tensorboard import test
  from tensorboard.backend import experiment_id
label_desc: Use image node_id 3 for calling the BaseTest obj's underlying member method code with example usage: obj.setUp() without return types