def METHOD_NAME(self):
    rmg = RasterModelGrid((4, 5))
    rmg.add_empty("values", at="node")
    node_values = rmg.at_node["values"]
    node_values[:] = np.arange(rmg.number_of_nodes)
    values_at_links = maps.map_min_of_link_nodes_to_link(rmg, "values")
    assert_array_equal(
        values_at_links,
        np.array(
            [
                0,
                1,
                2,
                3,
                0,
                1,
                2,
                3,
                4,
                5,
                6,
                7,
                8,
                5,
                6,
                7,
                8,
                9,
                10,
                11,
                12,
                13,
                10,
                11,
                12,
                13,
                14,
                15,
                16,
                17,
                18,
            ]
        ),
    )