def test_move_reference_radial(random_xy):
grid = RadialModelGrid(n_rings=9,
nodes_in_first_ring=8,
xy_of_center=random_xy)
assert grid.xy_of_center == approx(random_xy)
x, y = grid.x_of_node.copy(), grid.y_of_node.copy()
grid.xy_of_center = (30.0, 45.0)
assert grid.xy_of_center == (30.0, 45.0)
assert grid.x_of_node - x == approx(30.0 - random_xy[0])
assert grid.y_of_node - y == approx(45.0 - random_xy[1])
def test_move_reference_radial(random_xy):
mg = RadialModelGrid(num_shells=9, dr=10.0, xy_of_center=random_xy)
assert mg.xy_of_center == approx(random_xy)
pre_move_llc = (mg.x_of_node.min(), mg.y_of_node.min())
new_xy_of_center = (30.0, 45.0)
mg.xy_of_center = new_xy_of_center
assert mg.xy_of_center == approx(new_xy_of_center)
post_move_llc = (mg.x_of_node.min(), mg.y_of_node.min())
actual_dydx = (
post_move_llc[0] - pre_move_llc[0],
post_move_llc[1] - pre_move_llc[1],
)
known_dydx = (
new_xy_of_center[0] - random_xy[0],
new_xy_of_center[1] - random_xy[1],
)
assert known_dydx == approx(actual_dydx)
