code: def test01_small_invalid_dimension(self):
      index = HnswIndex(30)
      this_is_abnormal = False
      try:
          index.load(self.model_fname)
          this_is_abnormal = True
      except:
          pass
      finally:
          del index
      self.assertFalse(this_is_abnormal)
  
imports: import unittest
  import random
  import os
  from n2 import HnswIndex
label_desc: Use image node_id 3 for calling the BasicTest obj's underlying member method code with example usage: obj.test01_small_invalid_dimension() without return types