def METHOD_NAME():
    """Test corners at face tail and head."""
    graph = DualRadialGraph((1, 4), sort=True)
    assert_array_equal(graph.corners_at_face, [[0, 1], [0, 2], [1, 3], [2, 3]])
    assert_array_equal(
        graph.nodes_at_link,
        [[1, 0], [0, 2], [0, 3], [1, 2], [2, 3], [1, 4], [2, 4], [4, 3]],
    )