code: def test_dti_is_year_quarter_start(self):
      dti = date_range(
          freq="BQE-FEB", start=datetime(1998, 1, 1), periods=4
      )
  
      assert sum(dti.is_quarter_start) == 0
      assert sum(dti.is_quarter_end) == 4
      assert sum(dti.is_year_start) == 0
      assert sum(dti.is_year_end) == 1
  
imports: import calendar
  from datetime import date, datetime, time
  import locale
  import unicodedata
  import numpy
  import pytest
  from pandas._libs.tslibs import timezones
  from pandas import DatetimeIndex, Index, NaT, Timestamp, date_range, offsets
  import pandas._testing
  from pandas.core.arrays import DatetimeArray
label_desc: Use image node_id 13 for calling the TestDatetimeIndexOps obj's underlying member method code with example usage: obj.test_dti_is_year_quarter_start() without return types