code: def test_constructor_freq_mult_dti_compat(
      self, mult, freq_offset, freq_period
  ):
      freqstr_offset = str(mult) + freq_offset
      freqstr_period = str(mult) + freq_period
      pidx = period_range(
          start="2014-04-01", freq=freqstr_period, periods=10
      )
      expected = date_range(
          start="2014-04-01", freq=freqstr_offset, periods=10
      ).to_period(freqstr_period)
      tm.assert_index_equal(pidx, expected)
  
imports: import numpy
  import pytest
  from pandas._libs.tslibs.period import IncompatibleFrequency
  from pandas.core.dtypes.dtypes import PeriodDtype
  from pandas import Index, NaT, Period, PeriodIndex, Series, date_range, offsets, period_range
  import pandas._testing
  from pandas.core.arrays import PeriodArray
label_desc: Use image node_id 24 for calling the TestPeriodIndex obj's underlying member method code with example usage: obj.test_constructor_freq_mult_dti_compat(mult, freq_offset, freq_period) without return types