def test_window_1d(shape):
u = _sym.symarray(shape, 'u')
s = Window(u)
assert s[:].shape == shape
Nn = s.neighbors(1)
assert np.shape(Nn) == shape
assert (Nn[0] == u[1])
Np = s.neighbors(-1)
assert np.shape(Np) == shape
assert (Np[0] == u[-1])
sdp = s.diff_prev()
assert sdp[0] == u[0] - u[-1]
sdn = s.diff_next()
assert sdn[0] == u[1] - u[0]
sdc = s.diff_central()
assert sdc[0] == u[1] - 2 * u[0] + u[-1]
wshape = shape + (2, )
w = _sym.symarray(wshape, 'w')
s = Window(w, 2)
assert s.D == len(shape)
assert s[:].shape == wshape
assert s.neighbors(1).shape == wshape
def test_masking_2d_4x4():
shape = (4, 4)
u = _sym.symarray(shape, 'u')
_shape = np.array(shape)
s = Window(u, mask=s_[1:-1, 1:-1])
Nn = s.neighbors(1)
assert (Nn[0, 0, 0] == u[2, 1])
assert (Nn[1, 0, 0] == u[1, 2])
Np = s.neighbors(-1)
assert (Np[0, 0, 0] == u[0, 1])
assert (Np[1, 0, 0] == u[1, 0])
def test_masking_1d(shape):
u = _sym.symarray(shape, 'u')
_shape = np.array(shape)
s = Window(u, mask=s_[1:])
Nn = s.neighbors(1)
assert (Nn[0] == u[2 % shape[0]])
s = Window(u, mask=s_[1:])
Np = s.neighbors(-1)
assert (Np[0] == u[0])
s = Window(u, mask=s_[:-1])
Nn = s.neighbors(1)
assert (Nn[0] == u[1])
s = Window(u, mask=s_[:-1])
Np = s.neighbors(-1)
assert (Np[0] == u[-1])
def test_masking_2d(shape):
shape = (2, 2)
u = _sym.symarray(shape, 'u')
_shape = np.array(shape)
slice_shapediffs = [
(s_[1:], (1, 0)),
(s_[:-1], (1, 0)),
(s_[1:-1], (2, 0)),
(s_[:, 1:], (0, 1)),
(s_[:, :-1], (0, 1)),
]
for slices, shapediff in slice_shapediffs:
s = Window(u, mask=slices)
wshape = tuple(_shape - shapediff)
assert s[:].shape == wshape
Nn = s.neighbors(1)
assert np.shape(Nn) == (2, ) + wshape
s = Window(u, mask=s_[1:])
Nn = s.neighbors(1)
assert (Nn[0, 0, 0] == u[2 % shape[0], 0])
assert (Nn[1, 0, 0] == u[1, 1])
Np = s.neighbors(-1)
assert (Np[0, 0, 0] == u[0, 0])
assert (Np[1, 0, 0] == u[1, -1])
s = Window(u, mask=s_[1:, 1:])
Nn = s.neighbors(1)
assert (Nn[0, 0, 0] == u[2 % shape[0], 1])
assert (Nn[1, 0, 0] == u[1, 2 % shape[1]])
Np = s.neighbors(-1)
assert (Np[0, 0, 0] == u[0, 1])
assert (Np[1, 0, 0] == u[1, 0])
s = Window(u, mask=s_[:-1, :-1])
Nn = s.neighbors(1)
assert (Nn[0, 0, 0] == u[1, 0])
assert (Nn[1, 0, 0] == u[0, 1])
Np = s.neighbors(-1)
assert (Np[0, 0, 0] == u[-1, 0])
assert (Np[1, 0, 0] == u[0, -1])
def test_window_2d(shape):
u = _sym.symarray(shape, 'u')
s = Window(u)
assert s[:].shape == shape
Nn = s.neighbors(1)
assert np.all(Nn[:, 0, 0] == [u[1, 0], u[0, 1]])
Np = s.neighbors(-1)
assert np.all(Np[:, 0, 0] == [u[-1, 0], u[0, -1]])
sdp = s.diff_prev()
assert sdp[0, 0, 0] == u[0, 0] - u[-1, 0]
assert sdp[1, 0, 0] == u[0, 0] - u[0, -1]
sdn = s.diff_next()
assert sdn[0, 0, 0] == u[1, 0] - u[0, 0]
assert sdn[1, 0, 0] == u[0, 1] - u[0, 0]
sdc = s.diff_central()
assert sdc[0, 0, 0] == u[1, 0] - 2 * u[0, 0] + u[-1, 0]
assert sdc[1, 0, 0] == u[0, 1] - 2 * u[0, 0] + u[0, -1]
import numpy as np
from sympy import symbols
import _util
from _lib import Window
from _sym import symarray
import _10
nr = (4,4)
dx, dy = symbols('dx dy')
dr = np.array([dx, dy])
dt = symbols('dt')
p = symarray(nr, 'p')
b = symarray(nr, 'b')
def test_poisson():
pnew = p.copy()
pold = _10.poisson_old(p, b, dr, nt=1)
pnew = _10.poisson(pnew.T, b.T, dr, nt=1).T
assert np.all(pold == pnew)
from _lib import Window, s_
from _sym import symarray
import _11_old
import _11
simp = np.vectorize(cancel)
nr = (4,4)
mask = s_[1:-1,1:-1]
dx, dy, dt = symbols('dx dy dt')
rho, nu = symbols('rho nu')
dr = np.array([dx, dy])
u = symarray(nr, 'u')
v = symarray(nr, 'v')
b = symarray(nr, 'b')
p = symarray(nr, 'p')
uv = np.transpose((u, v), (1,2,0))
P = Window(p.copy(), mask=mask)
B = Window(b, mask=mask)
def test_b():
uvt = (u.T, v.T)
UV = Window(uv, 2, mask)
bold = _11_old.build_b(rho, dt, uvt, dr).T
bnew = _11.build_b(rho, dt, UV, dr).array
assert np.all(bold == bnew)
import numpy as np
from sympy import symbols
import _util
from _lib import Window
from _sym import symarray
import _9
dx, dy = symbols('dx dy')
dr = np.array([dx, dy])
nr = (4, 4)
p = symarray(nr, 'p')
p11 = p[1, 1]
r = _util.linspaces([[0, 0], [2, 1]], nr)
def test_laplace():
# swap beforehand because calc_* modifies array
pold = p.copy().T
pnew = p.copy()
_9.calc_laplace_old(pold, dr, r)
_9.calc_laplace(pnew, dr, r)
assert np.all(pold.T == pnew)
