code: def test_insert_depth():
      tree = rrcf.RCTree()
      tree.insert_point([0.0, 0.0], index=0)
      tree.insert_point([0.0, 0.0], index=1)
      tree.insert_point([0.0, 0.0], index=2)
      tree.insert_point([0.0, 1.0], index=3)
      tree.forget_point(index=3)
      min_depth = min(leaf.d for leaf in tree.leaves.values())
      assert min_depth >= 0
  
file_path: rrcf/test/test_rrcf.py
imports: import json
  import numpy
  import rrcf
label_desc: Use image node_id 13 for calling a global function with example usage: test_insert_depth() without return types