code: def testGenerate(self):
      generated_dockerfile_path = labels.DOCKERFILE_NAME
      with self._patchVersion(_FAKE_VERSION):
          dockerfile.Dockerfile(filename=generated_dockerfile_path)
          self.assertTrue(
              filecmp.cmp(
                  self._test_dockerfile, generated_dockerfile_path
              )
          )
  
file_path: tfx/tfx/tools/cli/container_builder/dockerfile_test.py
imports: import contextlib
  import filecmp
  import os
  import tensorflow
  from tfx import version
  from tfx.tools.cli.container_builder import dockerfile
  from tfx.tools.cli.container_builder import labels
  from tfx.utils import test_case_utils
label_desc: Use image node_id 3 for calling the DockerfileTest obj's underlying member method code with example usage: obj.testGenerate() without return types