docstr: Test expected boto3 client type.
docstr_tok: ["Test","expected","boto3","client","type","."]
code: def test_service_type(self):
      """Test expected boto3 client type."""
      assert EcrHook().client_type == "ecr"
  
file_path: airflow/tests/providers/amazon/aws/hooks/test_ecr.py
imports: from __future__ import annotations
  from unittest import mock
  import boto3
  import pytest
  from moto import mock_ecr
  from moto.core import DEFAULT_ACCOUNT_ID
  from airflow.providers.amazon.aws.hooks.ecr import EcrHook
label_desc: Use image node_id 1 for calling the TestEcrHook obj's underlying member method code with example usage: obj.test_service_type() without return types