class_docstr: Tests for rule_promotion/statistic.py:StagingStatistic
docstr: StagingStatistic - Stringer, Past Staging
docstr_tok: ["StagingStatistic","-","Stringer",",","Past","Staging"]
code: def test_stringer_past(self):
      """StagingStatistic - Stringer, Past Staging"""
      self.statistic.alert_count = 200
      self.statistic._current_time += timedelta(days=2, hours=10)
      expected_string = """\u25E6 test_rule
  	- Staged At:					2000-01-01 01:01:01 UTC
  	- Staged Until:					2000-01-03 01:01:01 UTC
  	- Time Past Staging:			1d 10h 0m
  	- Alert Count:					200
  	- Alert Info:					n/a"""
  
      assert_equal(str(self.statistic), expected_string)
  
file_path: streamalert/tests/unit/streamalert/rule_promotion/test_statistic.py
imports: from datetime import datetime, timedelta
  import os
  from mock import patch
  from nose.tools import assert_equal
  from streamalert.rule_promotion.statistic import StagingStatistic
label_desc: Use image node_id 5 for calling the TestStagingStatistic obj's underlying member method code with example usage: obj.test_stringer_past() without return types