def test_pencil():
from itertools import product
comm = MPI.COMM_WORLD
sizes = (7, 8, 9, 16, 17, 24)
types = 'fdgFDG'
atol = dict(f=1e-6, d=1e-14, g=1e-15)
for typecode in types:
for M, N, P in product(sizes, sizes, sizes):
if P % 2: continue
fft = Pencil(comm, (M, N, P), typecode)
shape = fft.forward_input_array.shape
dtype = fft.forward_input_array.dtype
U = np.random.random(shape).astype(dtype)
if 0:
F = fft.forward(U)
V = fft.backward(F)
else:
fft.forward_input_array[...] = U
fft.forward()
fft.backward()
V = fft.backward_output_array
fft.destroy()
assert np.allclose(U, V, atol=atol[typecode.lower()], rtol=0)
