class_docstr: TestRuleStats class
class_docstr_tok: ["TestRuleStats","class"]
docstr: RuleStatisticTracker - Statistics Info, None
docstr_tok: ["RuleStatisticTracker","-","Statistics","Info",",","None"]
code: def test_get_rule_stats_empty(self, log_mock):
      """RuleStatisticTracker - Statistics Info, None"""
      stats.RuleStatisticTracker.statistics_info()
      log_mock.assert_called_with("No rule statistics to return")
  
file_path: streamalert/tests/unit/streamalert/shared/test_stats.py
imports: from collections import namedtuple
  from mock import Mock, patch
  from nose.tools import assert_equal
  from streamalert.shared import stats
label_desc: Use image node_id 7 for calling the TestRuleStats obj's underlying member method code with example usage: obj.test_get_rule_stats_empty(log_mock) without return types