def METHOD_NAME():
    """
    Test that NotebookSchema raises a ValidationError if 'inputs_dir'
    isn't provided in the context.
    """
    input_value = {"filename": "DUMMY_NOTEBOOK.ipynb"}
    with pytest.raises(ValidationError) as exc_info:
        loaded_value = NotebookSchema().load(input_value)
    assert (
        "'inputs_dir' was not provided in the context. Cannot check for file existence."
        in exc_info.value.messages["filename"]
    )