code: def test_ewma_adjust():
      vals = Series(np.zeros(1000))
      vals[5] = 1
      result = vals.ewm(span=100, adjust=False).mean().sum()
      assert np.abs(result - 1) < 1e-2
  
imports: import numpy
  import pytest
  from pandas import DataFrame, DatetimeIndex, Series, date_range
  import pandas._testing
label_desc: Use image node_id 17 for calling a global function with example usage: test_ewma_adjust() without return types