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"Unit tests for MeshIterator and subclasses"
# Copyright (C) 2006-2011 Anders Logg
#
# 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/>.
#
# First added: 2006-08-08
# Last changed: 2011-08-21
import pytest
import numpy
from dolfin import *
def test_vertex_iterators():
"Iterate over vertices"
mesh = UnitCubeMesh(5, 5, 5)
for i in range(4):
mesh.init(0, i)
# Test connectivity
cons = [(i, mesh.topology()(0,i)) for i in range(4)]
# Test writability
for i, con in cons:
def assign(con, i):
con(i)[0] = 1
with pytest.raises(Exception):
assign(con, i)
n = 0
for i, v in enumerate(vertices(mesh)):
n += 1
for j, con in cons:
assert numpy.all(con(i) == v.entities(j))
assert n == mesh.num_vertices()
# Check coordinate assignment
# FIXME: Outcomment to hopefully please Mac-buildbot
#end_point = numpy.array([v.x(0), v.x(1), v.x(2)])
#mesh.coordinates()[:] += 2
#assert end_point[0] + 2 == mesh.coordinates()[-1,0]
#assert end_point[1] + 2 == mesh.coordinates()[-1,1]
#assert end_point[2] + 2 == mesh.coordinates()[-1,2]
def test_edge_iterators():
"Iterate over edges"
mesh = UnitCubeMesh(5, 5, 5)
for i in range(4):
mesh.init(1, i)
# Test connectivity
cons = [(i, mesh.topology()(1,i)) for i in range(4)]
# Test writability
for i, con in cons:
def assign(con, i):
con(i)[0] = 1
with pytest.raises(Exception):
assign(con, i)
n = 0
for i, e in enumerate(edges(mesh)):
n += 1
for j, con in cons:
assert numpy.all(con(i) == e.entities(j))
assert n == mesh.num_edges()
def test_face_iterator():
"Iterate over faces"
mesh = UnitCubeMesh(5, 5, 5)
for i in range(4):
mesh.init(2, i)
# Test connectivity
cons = [(i, mesh.topology()(2,i)) for i in range(4)]
# Test writability
for i, con in cons:
def assign(con, i):
con(i)[0] = 1
with pytest.raises(Exception):
assign(con, i)
n = 0
for i, f in enumerate(faces(mesh)):
n += 1
for j, con in cons:
assert numpy.all(con(i) == f.entities(j))
assert n == mesh.num_faces()
def test_facet_iterators():
"Iterate over facets"
mesh = UnitCubeMesh(5, 5, 5)
n = 0
for f in facets(mesh):
n += 1
assert n == mesh.num_facets()
def test_cell_iterators():
"Iterate over cells"
mesh = UnitCubeMesh(5, 5, 5)
for i in range(4):
mesh.init(3, i)
# Test connectivity
cons = [(i, mesh.topology()(3,i)) for i in range(4)]
# Test writability
for i, con in cons:
def assign(con, i):
con(i)[0] = 1
with pytest.raises(Exception):
assign(con, i)
n = 0
for i, c in enumerate(cells(mesh)):
n += 1
for j, con in cons:
assert numpy.all(con(i) == c.entities(j))
assert n == mesh.num_cells()
# Test non destruction of MeshEntities
cell_list = [c for c in cells(mesh)]
assert sum(c.volume() for c in cell_list) == sum(c.volume() for c in cells(mesh))
def test_mixed_iterators():
"Iterate over vertices of cells"
mesh = UnitCubeMesh(5, 5, 5)
n = 0
for c in cells(mesh):
for v in vertices(c):
n += 1
assert n == 4*mesh.num_cells()
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