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"""Unit tests for the HDF5 io library - timeseries io"""
# Copyright (C) 2014 Chris Richardson
#
# This file is part of DOLFIN.
#
# DOLFIN is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# DOLFIN is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with DOLFIN. If not, see <http://www.gnu.org/licenses/>.
#
import pytest
import os
from dolfin import *
from dolfin_utils.test import skip_if_not_HDF5, fixture, tempdir, \
xfail_with_serial_hdf5_in_parallel
@skip_if_not_HDF5
@xfail_with_serial_hdf5_in_parallel
def test_save_and_read_function_timeseries(tempdir):
filename = os.path.join(tempdir, "function.h5")
mesh = UnitSquareMesh(10, 10)
Q = FunctionSpace(mesh, "CG", 3)
F0 = Function(Q)
F1 = Function(Q)
E = Expression("t*x[0]", t = 0.0, degree=1)
F0.interpolate(E)
# Save to HDF5 File
hdf5_file = HDF5File(mesh.mpi_comm(), filename, "w")
for t in range(10):
E.t = t
F0.interpolate(E)
hdf5_file.write(F0, "/function", t)
hdf5_file.close()
#Read back from file
hdf5_file = HDF5File(mesh.mpi_comm(), filename, "r")
for t in range(10):
E.t = t
F1.interpolate(E)
vec_name = "/function/vector_%d"%t
hdf5_file.read(F0, vec_name)
timestamp = hdf5_file.attributes(vec_name)["timestamp"]
assert timestamp == t
result = F0.vector() - F1.vector()
assert len(result.get_local().nonzero()[0]) == 0
hdf5_file.close()
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