def METHOD_NAME():
    # When the ensure method is called with a file_op and no content
    struct = {"a": {"b": "0"}}
    struct = structure.ensure(struct, "a/b", file_op=NO_OVERWRITE)
    # Then the content should remain the same
    # But the file_op should change
    assert struct["a"]["b"] == ("0", NO_OVERWRITE)