code: def verify_presto_column(self, column, expected_results):
      inspector = mock.Mock()
      inspector.engine.dialect.identifier_preparer.quote_identifier = (
          mock.Mock()
      )
      row = mock.Mock()
      row.Column, row.Type, row.Null = column
      inspector.bind.execute.return_value.fetchall = mock.Mock(
          return_value=[row]
      )
      results = PrestoEngineSpec.get_columns(inspector, "", "")
      self.assertEqual(len(expected_results), len(results))
      for expected_result, result in zip(expected_results, results):
          self.assertEqual(expected_result[0], result["column_name"])
          self.assertEqual(expected_result[1], str(result["type"]))
  
imports: from collections import namedtuple
  from textwrap import dedent
  from unittest import mock, skipUnless
  import pandas
  from flask.ctx import AppContext
  from sqlalchemy import types
  from sqlalchemy.sql import select
  from superset.db_engine_specs.presto import PrestoEngineSpec
  from superset.errors import ErrorLevel, SupersetError, SupersetErrorType
  from superset.sql_parse import ParsedQuery
  from superset.utils.database import get_example_database
  from tests.integration_tests.db_engine_specs.base_tests import TestDbEngineSpec
label_desc: Use image node_id 4 for calling the TestPrestoDbEngineSpec obj's underlying member method code with example usage: obj.verify_presto_column(column, expected_results) without return types