docstr: a value error should be raised if percentile split points are not monotonically increasing
code: def test_percentile_split_points_monotonic(self):
      """a value error should be raised if percentile split points are not monotonically increasing"""
  
      Discretiser(
          method="percentiles", percentile_split_points=[0, -0, 0.1, 1]
      )
      with pytest.raises(
          ValueError,
          match="percentile_split_points must be monotonically increasing",
      ):
          Discretiser(
              method="percentiles", percentile_split_points=[1, 0.1]
          )
  
imports: import math
  import numpy
  import pytest
  from causalnex.discretiser import Discretiser
label_desc: Use image node_id 12 for calling the TestErrorHandling obj's underlying member method code with example usage: obj.test_percentile_split_points_monotonic() without return types