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"""Unit tests for SubDomain"""
# Copyright (C) 2013 Johan Hake
#
# 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 numpy as np
from dolfin import *
from dolfin_utils.test import skip_in_parallel
import pytest
def test_compiled_subdomains():
def noDefaultValues():
CompiledSubDomain("a")
def wrongDefaultType():
CompiledSubDomain("a", a="1")
def wrongParameterNames():
CompiledSubDomain("foo", bar=1.0)
with pytest.raises(RuntimeError):
noDefaultValues()
with pytest.raises(TypeError):
wrongDefaultType()
with pytest.raises(RuntimeError):
wrongParameterNames()
@skip_in_parallel
def test_compiled_subdomains_compilation_failure():
def invalidCppCode():
CompiledSubDomain("/")
with pytest.raises(RuntimeError):
invalidCppCode()
def test_creation_and_marking():
class Left(SubDomain):
def inside(self, x, on_boundary):
return x[0] < DOLFIN_EPS
class LeftOnBoundary(SubDomain):
def inside(self, x, on_boundary):
return x[0] < DOLFIN_EPS and on_boundary
class Right(SubDomain):
def inside(self, x, on_boundary):
return x[0] > 1.0 - DOLFIN_EPS
class RightOnBoundary(SubDomain):
def inside(self, x, on_boundary):
return x[0] > 1.0 - DOLFIN_EPS and on_boundary
cpp_code = """
#include<pybind11/pybind11.h>
#include<pybind11/eigen.h>
namespace py = pybind11;
#include<Eigen/Dense>
#include<dolfin/mesh/SubDomain.h>
class Left : public dolfin::SubDomain
{
public:
virtual bool inside(Eigen::Ref<const Eigen::VectorXd> x, bool on_boundary) const
{
return x[0] < DOLFIN_EPS;
}
};
class LeftOnBoundary : public dolfin::SubDomain
{
public:
virtual bool inside(Eigen::Ref<const Eigen::VectorXd> x, bool on_boundary) const
{
return x[0] < DOLFIN_EPS and on_boundary;
}
};
class Right : public dolfin::SubDomain
{
public:
virtual bool inside(Eigen::Ref<const Eigen::VectorXd> x, bool on_boundary) const
{
return x[0] > 1.0 - DOLFIN_EPS;
}
};
class RightOnBoundary : public dolfin::SubDomain
{
public:
virtual bool inside(Eigen::Ref<const Eigen::VectorXd> x, bool on_boundary) const
{
return x[0] > 1.0 - DOLFIN_EPS and on_boundary;
}
};
PYBIND11_MODULE(SIGNATURE, m) {
py::class_<Left, std::shared_ptr<Left>, dolfin::SubDomain>(m, "Left").def(py::init<>());
py::class_<Right, std::shared_ptr<Right>, dolfin::SubDomain>(m, "Right").def(py::init<>());
py::class_<LeftOnBoundary, std::shared_ptr<LeftOnBoundary>, dolfin::SubDomain>(m, "LeftOnBoundary").def(py::init<>());
py::class_<RightOnBoundary, std::shared_ptr<RightOnBoundary>, dolfin::SubDomain>(m, "RightOnBoundary").def(py::init<>());
}
"""
compiled_domain_module = compile_cpp_code(cpp_code)
subdomain_pairs = [(Left(), Right()),
(LeftOnBoundary(), RightOnBoundary()),
(AutoSubDomain(lambda x, on_boundary: x[0] < DOLFIN_EPS),
AutoSubDomain(lambda x, on_boundary: x[0] > 1.0 - DOLFIN_EPS)),
(AutoSubDomain(lambda x, on_boundary: x[0] < DOLFIN_EPS and on_boundary),
AutoSubDomain(lambda x, on_boundary: x[0] > 1.0 - DOLFIN_EPS and on_boundary)),
(CompiledSubDomain("near(x[0], a)", a=0.0),
CompiledSubDomain("near(x[0], a)", a=1.0)),
(CompiledSubDomain("near(x[0], a) and on_boundary", a=0.0),
CompiledSubDomain("near(x[0], a) and on_boundary", a=1.0)),
(CompiledSubDomain("near(x[0], 0.0)"),
CompiledSubDomain("near(x[0], 1.0)")),
(CompiledSubDomain("near(x[0], 0.0) and on_boundary"),
CompiledSubDomain("near(x[0], 1.0) and on_boundary")),
#
(compiled_domain_module.Left(),
compiled_domain_module.Right()),
(compiled_domain_module.LeftOnBoundary(),
compiled_domain_module.RightOnBoundary())
]
empty = CompiledSubDomain("false")
every = CompiledSubDomain("true")
for ind, MeshClass in enumerate([UnitIntervalMesh, UnitSquareMesh,
UnitCubeMesh]):
dim = ind + 1
args = [10]*dim
mesh = MeshClass(*args)
mesh.init()
for left, right in subdomain_pairs:
for t_dim, f_dim in [(0, 0),
(mesh.topology().dim()-1, dim - 1),
(mesh.topology().dim(), dim)]:
f = MeshFunction("size_t", mesh, t_dim, 0)
left.mark(f, int(1))
right.mark(f, 2)
correct = {(1, 0): 1,
(1, 0): 1,
(1, 1): 0,
(2, 0): 11,
(2, 1): 10,
(2, 2): 0,
(3, 0): 121,
(3, 2): 200,
(3, 3): 0}
# Check that the number of marked entities are at least the
# correct number (it can be larger in parallel)
assert all(value >= correct[dim, f_dim]
for value in [
MPI.sum(mesh.mpi_comm(), float((f.array() == 2).sum())),
MPI.sum(mesh.mpi_comm(), float((f.array() == 1).sum())),
])
for t_dim, f_dim in [(0, 0),
(mesh.topology().dim()-1, dim-1),
(mesh.topology().dim(), dim)]:
f = MeshFunction("size_t", mesh, t_dim, 0)#
empty.mark(f, 1)
every.mark(f, 2)
# Check that the number of marked entities is correct
assert sum(f.array() == 1) == 0
assert sum(f.array() == 2) == mesh.num_entities(f_dim)
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