code: def test_snapshot_with_conda_yml(isfile):
      response = RuntimeEnvironmentManager().snapshot(TEST_CONDA_YML)
      isfile.assert_called_once_with(TEST_CONDA_YML)
      assert response == TEST_CONDA_YML
  
imports: from __future__ import absolute_import
  import subprocess
  import pytest
  from mock import patch, Mock
  import sys
  import shlex
  import os
  from mock.mock import MagicMock
  from sagemaker.remote_function.runtime_environment.runtime_environment_manager import RuntimeEnvironmentManager, RuntimeEnvironmentError
label_desc: Use image node_id 3 for calling a global function with example usage: test_snapshot_with_conda_yml(isfile) without return types