def METHOD_NAME():
    """Test nodes at left edge of raster grid."""
    grid = RasterModelGrid((3, 4))
    assert_array_equal(grid.nodes_at_left_edge, np.array([0, 4, 8], dtype=int))
    vals_at_node = np.array([0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11])
    assert_array_equal(vals_at_node[grid.nodes_at_left_edge], np.array([0, 4, 8]))