code: def test_distinct(self):
      collection = mongomock.MongoClient().db.collection
      objs = [
          {"test_id": "1", "test_status": "success"},
          {"test_id": "2", "test_status": "failure"},
          {"test_id": "3", "test_status": "success"},
      ]
  
      collection.insert_many(objs)
  
      results = self.hook.distinct(collection, "test_status")
      assert len(results) == 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 24 for calling the TestMongoHook obj's underlying member method code with example usage: obj.test_distinct() without return types