code: def test_NDaysBeforeLastTradingDayOfWeek(self):
      for n in range(MAX_WEEK_RANGE):
          rule = NDaysBeforeLastTradingDayOfWeek(n)
          rule.cal = self.cal
          should_trigger = rule.should_trigger
          for minute in self.sept_week:
              if should_trigger(minute):
                  n_tdays = 0
                  session = self.cal.minute_to_session_label(
                      minute, direction="none"
                  )
                  next_session = self.cal.next_session_label(session)
                  while next_session.dayofweek > session.dayofweek:
                      session = next_session
                      next_session = self.cal.next_session_label(
                          session
                      )
                      n_tdays += 1
  
                  self.assertEqual(n_tdays, n)
  
imports: import datetime
  from inspect import isabstract
  import random
  from unittest import TestCase
  import warnings
  from nose_parameterized import parameterized
  import pandas
  from six import iteritems
  from six.moves import range, map
  from trading_calendars import get_calendar
  import zipline.utils.events
  from zipline.utils.events import EventRule, StatelessRule, Always, Never, AfterOpen, ComposedRule, BeforeClose, NotHalfDay, NthTradingDayOfWeek, NDaysBeforeLastTradingDayOfWeek, NthTradingDayOfMonth, NDaysBeforeLastTradingDayOfMonth, StatefulRule, OncePerDay, _build_offset, _build_date, _build_time, EventManager, Event, MAX_MONTH_RANGE, MAX_WEEK_RANGE, TradingDayOfMonthRule, TradingDayOfWeekRule
label_desc: Use image node_id 10 for calling the StatelessRulesTests obj's underlying member method code with example usage: obj.test_NDaysBeforeLastTradingDayOfWeek() without return types