code: def test_same_len_hash_collisions(l_exp, l_add):
      length = 2 ** (l_exp + 8) + l_add
      idx = np.array([str(i) for i in range(length)], dtype=object)
  
      result = hash_array(idx, "utf8")
      assert not result[0] == result[1]
  
imports: import numpy
  import pytest
  import pandas
  from pandas import DataFrame, Index, MultiIndex, Series, period_range, timedelta_range
  import pandas._testing
  from pandas.core.util.hashing import hash_tuples
  from pandas.util import hash_array, hash_pandas_object
label_desc: Use image node_id 27 for calling a global function with example usage: test_same_len_hash_collisions(l_exp, l_add) without return types