code: def testInvalidGridEightDescription(self):
      self.templateAssertRaises(
          10, type_conn=conn_type.GRID_EIGHT, height=5, width=8
      )
      self.templateAssertRaises(
          10, type_conn=conn_type.GRID_EIGHT, height=1, width=2
      )
      self.templateAssertRaises(
          10, type_conn=conn_type.GRID_EIGHT, height=1, width=1
      )
      self.templateAssertRaises(
          10, type_conn=conn_type.GRID_EIGHT, height=0, width=0
      )
  
imports: import unittest
  import math
  from pyclustering.nnet import network, conn_type, conn_represent
label_desc: Use image node_id 42 for calling the NnetUnitTest obj's underlying member method code with example usage: obj.testInvalidGridEightDescription() without return types