code: def test_fast_abs_percentile():
      data = np.arange(1, 100)
      for p in range(10, 100, 10):
          assert _fast_abs_percentile(data, p - 1) == p
  
imports: import numpy
  from ..edge_detect import _edge_detect, _fast_abs_percentile
label_desc: Use image node_id 1 for calling a global function with example usage: test_fast_abs_percentile() without return types