code: def test_insert_many(self):
      collection = mongomock.MongoClient().db.collection
      objs = [
          {"test_insert_many_1": "test_value"},
          {"test_insert_many_2": "test_value"},
      ]
  
      self.hook.insert_many(collection, objs)
  
      result_objs = list(collection.find())
      assert len(result_objs) == 2
  
imports: from __future__ import annotations
  import importlib
  from typing import TYPE_CHECKING
  import pymongo
  import pytest
  from airflow.models import Connection
  from airflow.providers.mongo.hooks.mongo import MongoHook
  from airflow.utils import db
label_desc: Use image node_id 5 for calling the TestMongoHook obj's underlying member method code with example usage: obj.test_insert_many() without return types