class_docstr: TestRuleStats class
class_docstr_tok: ["TestRuleStats","class"]
docstr: RuleStatistic - Stringer
docstr_tok: ["RuleStatistic","-","Stringer"]
code: def test_rule_stats_string(self):
      """RuleStatistic - Stringer"""
      stat = stats.RuleStatistic(10.0)
      stat.calls = 1
      assert_equal(
          str(stat),
          "   10.00000000 ms       1 calls     10.00000000 avg",
      )
  
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 6 for calling the TestRuleStats obj's underlying member method code with example usage: obj.test_rule_stats_string() without return types