class_docstr: Test class for the BoxApp
code: def _get_sample_payload(self, count):
      return {
          "chunk_size": 10,
          "next_stream_position": "1152922976252290886",
          "entries": self._get_sample_logs(count),
      }
  
imports: import json
  import os
  from boxsdk.exception import BoxException
  from mock import call, Mock, mock_open, patch
  from moto import mock_ssm
  from nose.tools import assert_equal, assert_false, assert_count_equal, assert_true
  import requests
  from streamalert.apps._apps.box import BoxApp
  from tests.unit.streamalert.apps.test_helpers import get_event, put_mock_params
  from tests.unit.streamalert.shared.test_config import get_mock_lambda_context
label_desc: Use image node_id 20 for calling the TestBoxApp obj's underlying member method code with example usage: obj._get_sample_payload(count) and returns: dict