code: def test_dockerfile_override(
      test_settings,
      live_mock_server,
      mocked_fetchable_git_repo_nodeps,
      monkeypatch,
  ):
      api = wandb.sdk.internal.internal_api.Api(
          default_settings=test_settings, load_settings=False
      )
      test_spec = {
          "uri": "https://wandb.ai/mock_server_entity/test/runs/1",
          "entity": "mock_server_entity",
          "project": "test",
          "resource": "local",
      }
  
      test_project = create_project_from_spec(test_spec, api)
      test_project = fetch_and_validate_project(test_project, api)
  
      assert test_project.deps_type is None
  
      dockerfile_contents = "test Dockerfile contents"
      with patch(
          "builtins.open", mock_open(read_data=dockerfile_contents)
      ) as mock_file:
          monkeypatch.setattr("os.path.exists", lambda _: True)
          dockerfile = generate_dockerfile(
              test_project,
              EntryPoint("main.py", ["python", "train.py"]),
              "local",
              "docker",
              "test/path/to/my/Dockerfile",
          )
      assert "test Dockerfile contents" in dockerfile
      assert (
          "test/path/to/my/Dockerfile"
          in mock_file.call_args_list[0][0][0]
      )
  
file_path: wandb/tests/pytest_tests/unit_tests_old/test_launch/test_launch_docker.py
imports: from unittest.mock import MagicMock, mock_open, patch
  import wandb
  from wandb.docker import DockerError
  from wandb.sdk.launch._project_spec import EntryPoint, create_project_from_spec, fetch_and_validate_project
  from wandb.sdk.launch.builder.build import generate_dockerfile, get_base_setup
  from wandb.sdk.launch.utils import docker_image_exists
  from .test_launch import mocked_fetchable_git_repo, mocked_fetchable_git_repo_conda, mocked_fetchable_git_repo_nodeps
label_desc: Use image node_id 6 for calling a global function with example usage: test_dockerfile_override(test_settings, live_mock_server, mocked_fetchable_git_repo_nodeps, monkeypatch) without return types