code: def testServeExecutionDigestsWithEqualBeginAndEnd(self):
      _generate_tfdbg_v2_data(self.logdir)
      run = self._getExactlyOneRun()
      response = self.server.get(
          _ROUTE_PREFIX
          + "/execution/digests?run=%s&begin=0&end=0" % run
      )
      self.assertEqual(200, response.status_code)
      self.assertEqual(
          "application/json", response.headers.get("content-type")
      )
      data = json.loads(response.get_data())
      self.assertEqual(
          data,
          {
              "begin": 0,
              "end": 0,
              "num_digests": 3,
              "execution_digests": [],
          },
      )
  
imports: import collections
  import json
  import os
  import socket
  import threading
  import tensorflow
  from werkzeug import test
  from werkzeug import wrappers
  from tensorboard.backend import application
  from tensorboard.plugins import base_plugin
  from tensorboard.plugins.debugger_v2 import debug_data_multiplexer
  from tensorboard.plugins.debugger_v2 import debugger_v2_plugin
label_desc: Use image node_id 18 for calling the DebuggerV2PluginTest obj's underlying member method code with example usage: obj.testServeExecutionDigestsWithEqualBeginAndEnd() without return types