How to use the cruft.exceptions.CruftAlreadyPresent function in cruft

def test_cruft_already_present():
    instance = exceptions.CruftAlreadyPresent(".")
    assert instance.file_location == "."
    assert isinstance(instance, exceptions.CruftError)

def test_link_examples(project_dir, tmpdir):
    os.chdir(project_dir)
    with pytest.raises(exceptions.CruftAlreadyPresent):
        verify_and_test_examples(api.link)

    tmpdir.chdir()
    Repo.clone_from("https://github.com/timothycrosley/cruft", str(tmpdir))
    os.remove(os.path.join(tmpdir, ".cruft.json"))
    verify_and_test_examples(api.link)

def link(
    template_git_url: str,
    project_dir: str = ".",
    use_latest: bool = False,
    no_input: bool = False,
    config_file: Optional[str] = None,
    default_config: bool = False,
    extra_context: Optional[dict] = None,
) -> bool:
    """Links an existing project created from a template, to the template it was created from."""
    project_dir_path = Path(project_dir)
    cruft_file = project_dir_path / ".cruft.json"
    if cruft_file.is_file():
        raise CruftAlreadyPresent(cruft_file)

    with TemporaryDirectory() as cookiecutter_template_dir_str:
        cookiecutter_template_dir = Path(cookiecutter_template_dir_str)
        try:
            repo = Repo.clone_from(template_git_url, cookiecutter_template_dir)
            last_commit = repo.head.object.hexsha
        except Exception as e:  # pragma: no cover
            raise InvalidCookiecutterRepository(e)

        main_cookiecutter_directory: Optional[Path] = None
        for dir_item in cookiecutter_template_dir.glob("*cookiecutter.*"):
            if dir_item.is_dir() and "{{" in dir_item.name and "}}" in dir_item.name:
                main_cookiecutter_directory = dir_item
                break

        if not main_cookiecutter_directory:  # pragma: no cover