def METHOD_NAME(self):
    """Is the quickstart example properly generated if source folder removed?"""
    run_nbgrader(["quickstart", "example_source_folder_fail"])
    # it should fail if it already exists
    run_nbgrader(["quickstart", "example_source_folder_fail"], retcode=1)
    # it should succeed if source folder not present and create it
    shutil.rmtree(os.path.join("example_source_folder_fail", "source"))
    # it should fail if it already source folder or config file exists
    run_nbgrader(["quickstart", "example_source_folder_fail"], retcode=1)