code: def testnext_fast_len_big(self):
      hams = {
          510183360: 510183360,
          510183360 + 1: 512000000,
          511000000: 512000000,
          854296875: 854296875,
          854296875 + 1: 859963392,
          196608000000: 196608000000,
          196608000000 + 1: 196830000000,
          8789062500000: 8789062500000,
          8789062500000 + 1: 8796093022208,
          206391214080000: 206391214080000,
          206391214080000 + 1: 206624260800000,
          470184984576000: 470184984576000,
          470184984576000 + 1: 470715894135000,
          7222041363087360: 7222041363087360,
          7222041363087360 + 1: 7230196133913600,
          # power of 5    5**23
          11920928955078125: 11920928955078125,
          11920928955078125 - 1: 11920928955078125,
          # power of 3    3**34
          16677181699666569: 16677181699666569,
          16677181699666569 - 1: 16677181699666569,
          # power of 2   2**54
          18014398509481984: 18014398509481984,
          18014398509481984 - 1: 18014398509481984,
          # above this, int(ceil(n)) == int(ceil(n+1))
          19200000000000000: 19200000000000000,
          19200000000000000 + 1: 19221679687500000,
          288230376151711744: 288230376151711744,
          288230376151711744 + 1: 288325195312500000,
          288325195312500000 - 1: 288325195312500000,
          288325195312500000: 288325195312500000,
          288325195312500000 + 1: 288555831593533440,
      }
      for x, y in hams.items():
          assert_equal(next_fast_len(x, True), y)
  
imports: from scipy.fft._helper import next_fast_len, _init_nd_shape_and_axes
  from numpy.testing import assert_equal, assert_array_equal
  from pytest import raises
  import pytest
  import numpy
  import sys
label_desc: Use image node_id 4 for calling the TestNextFastLen obj's underlying member method code with example usage: obj.testnext_fast_len_big() without return types