code: def test_intersect_interval(self):
      int1 = (0, 1)
      int2 = (0.5, 2)
      inter = box_utils.intersect_interval(int1, int2)
      assert inter == (0.5, 1)
  
      int1 = (0, 1)
      int2 = (1.5, 2)
      inter = box_utils.intersect_interval(int1, int2)
      assert inter == (0, 0)
  
      int1 = (1.5, 2)
      int2 = (0, 1)
      inter = box_utils.intersect_interval(int1, int2)
      assert inter == (0, 0)
  
file_path: deepchem/deepchem/utils/test/test_coordinate_box_utils.py
imports: import numpy
  import unittest
  from deepchem.utils import coordinate_box_utils
label_desc: Use image node_id 8 for calling the TestCoordinateBoxUtils obj's underlying member method code with example usage: obj.test_intersect_interval() without return types