docstr: Test that if Connection ID is looked up in AWS Parameter Store with the added leading "/"
docstr_tok: ["Test","that","if","Connection","ID","is","looked","up","in","AWS","Parameter","Store","with","the","added","leading","``","\/","''"]
code: def test_connection_prefix_with_no_leading_slash(self, mock_client):
      """
      Test that if Connection ID is looked up in AWS Parameter Store with the added leading "/"
      """
      mock_client().get_parameter.return_value = {
          "Parameter": {
              "Value": None,
          },
      }
      kwargs = {"connections_prefix": "airflow/connections"}
  
      secrets_manager_backend = SystemsManagerParameterStoreBackend(
          **kwargs
      )
      secrets_manager_backend.get_conn_value("test_mysql")
      mock_client().get_parameter.assert_called_with(
          Name="/airflow/connections/test_mysql", WithDecryption=True
      )
  
imports: from __future__ import annotations
  import json
  from unittest import mock
  import pytest
  from moto import mock_ssm
  from airflow.configuration import initialize_secrets_backends
  from airflow.providers.amazon.aws.secrets.systems_manager import SystemsManagerParameterStoreBackend
  from tests.test_utils.config import conf_vars
label_desc: Use image node_id 15 for calling the TestSsmSecrets obj's underlying member method code with example usage: obj.test_connection_prefix_with_no_leading_slash(mock_client) without return types