docstr: Test if x == eval_height counts as an intersection.
docstr_tok: ["Test","if","x","==","eval_height","counts","as","an","intersection","."]
code: def test_intersection_rules(self, rel_height, xp, scp):
      """Test if x == eval_height counts as an intersection."""
      # Flatt peak with two possible intersection points if evaluated at 1
      x = [0, 1, 2, 1, 3, 3, 3, 1, 2, 1, 0]
      # relative height is 0 -> width is 0 as well, raises warning
      out = scp.signal.peak_widths(x, peaks=[5], rel_height=rel_height)
      return out
  
imports: import pytest
  import cupy
  from cupy.cuda import driver
  from cupy.cuda import runtime
  from cupy import testing
  import cupyx.scipy.signal
  import numpy
label_desc: Use image node_id 6 for calling the TestPeakWidths obj's underlying member method code with example usage: obj.test_intersection_rules(rel_height, xp, scp) and returns: out