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b"""Unit tests for the FunctionSpace class"""
# Copyright (C) 2011 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/>.
#
# Modified by Oeyvind Evju 2013
#
# First added: 2011-09-21
# Last changed: 2013-10-11
import pytest
from dolfin import *
from ufl.log import UFLException
from dolfin_utils.test import fixture
@fixture
def mesh():
return UnitCubeMesh(8, 8, 8)
@fixture
def V(mesh):
return FunctionSpace(mesh, 'CG', 1)
@fixture
def W(mesh):
return VectorFunctionSpace(mesh, 'CG', 1)
@fixture
def Q(mesh):
W = VectorElement('CG', mesh.ufl_cell(), 1)
V = FiniteElement('CG', mesh.ufl_cell(), 1)
return FunctionSpace(mesh, W*V)
@fixture
def f(V):
return Function(V)
@fixture
def V2(f):
return f.function_space()
@fixture
def g(W):
return Function(W)
@fixture
def W2(g):
return g.function_space()
def test_python_interface(V, V2, W, W2, Q):
# Test Python interface of cpp generated FunctionSpace
assert isinstance(V, FunctionSpace)
assert isinstance(W, FunctionSpace)
assert isinstance(V2, FunctionSpace)
assert isinstance(W2, FunctionSpace)
assert V.ufl_cell() == V2.ufl_cell()
assert W.ufl_cell() == W2.ufl_cell()
assert V.dolfin_element().signature() == V2.dolfin_element().signature()
assert W.dolfin_element().signature() == W2.dolfin_element().signature()
assert V.ufl_element() == V2.ufl_element()
assert W.ufl_element() == W2.ufl_element()
assert W.id() == W2.id()
assert V.id() == V2.id()
def test_component(V, W, Q):
assert not W.component()
assert not V.component()
assert W.sub(0).component()[0] == 0
assert W.sub(1).component()[0] == 1
assert Q.sub(0).component()[0] == 0
assert Q.sub(1).component()[0] == 1
def test_equality(V, V2, W, W2):
assert V == V
assert V == V2
assert W == W
assert W == W2
def test_inclusion(V, Q):
assert V.contains(V)
assert not Q.contains(V)
assert Q.contains(Q)
assert Q.contains(Q.sub(0))
assert Q.contains(Q.sub(1))
assert Q.contains(Q.sub(0).sub(0))
assert Q.contains(Q.sub(0).sub(1))
assert Q.contains(Q.extract_sub_space((0, 0)))
assert Q.contains(Q.extract_sub_space((0, 1)))
assert Q.contains(Q.extract_sub_space((1,)))
assert not Q.sub(0).contains(Q)
assert Q.sub(0).contains(Q.sub(0))
assert not Q.sub(0).contains(Q.sub(1))
assert Q.sub(0).contains(Q.sub(0).sub(0))
assert Q.sub(0).contains(Q.sub(0).sub(1))
assert Q.sub(0).contains(Q.extract_sub_space((0, 0)))
assert Q.sub(0).contains(Q.extract_sub_space((0, 1)))
assert not Q.sub(0).contains(Q.extract_sub_space((1,)))
assert not Q.sub(1).contains(Q)
assert not Q.sub(1).contains(Q.sub(0))
assert Q.sub(1).contains(Q.sub(1))
assert not Q.sub(1).contains(Q.sub(0).sub(0))
assert not Q.sub(1).contains(Q.sub(0).sub(1))
assert not Q.sub(1).contains(Q.extract_sub_space((0, 0)))
assert not Q.sub(1).contains(Q.extract_sub_space((0, 1)))
assert Q.sub(1).contains(Q.extract_sub_space((1,)))
assert not Q.sub(0).sub(0).contains(Q)
assert not Q.sub(0).sub(0).contains(Q.sub(0))
assert not Q.sub(0).sub(0).contains(Q.sub(1))
assert Q.sub(0).sub(0).contains(Q.sub(0).sub(0))
assert not Q.sub(0).sub(0).contains(Q.sub(0).sub(1))
assert Q.sub(0).sub(0).contains(Q.extract_sub_space((0, 0)))
assert not Q.sub(0).sub(0).contains(Q.extract_sub_space((0, 1)))
assert not Q.sub(0).sub(0).contains(Q.extract_sub_space((1,)))
def test_boundary(mesh):
bmesh = BoundaryMesh(mesh, "exterior")
Vb = FunctionSpace(bmesh, "DG", 0)
Wb = VectorFunctionSpace(bmesh, "CG", 1)
assert Vb.dim() == 768
assert Wb.dim() == 1158
def test_not_equal(W, V, W2, V2):
assert W != V
assert W2 != V2
def test_sub_equality(W, Q):
assert W.sub(0) == W.sub(0)
assert W.sub(0) != W.sub(1)
assert W.sub(0) == W.extract_sub_space([0])
assert W.sub(1) == W.extract_sub_space([1])
assert Q.sub(0) == Q.extract_sub_space([0])
def test_in_operator(f, g, V, V2, W, W2, mesh):
assert f in V
assert f in V2
assert g in W
assert g in W2
with pytest.raises(RuntimeError):
mesh in V
def test_collapse(W, V):
Vs = W.sub(2)
with pytest.raises(RuntimeError):
Function(Vs)
assert Vs.dofmap().cell_dofs(0)[0] != V.dofmap().cell_dofs(0)[0]
# Collapse the space it should now be the same as V
Vc, dofmap_new_old = Vs.collapse(True)
assert Vc.dofmap().cell_dofs(0)[0] == V.dofmap().cell_dofs(0)[0]
f0 = Function(V)
f1 = Function(Vc)
assert len(f0.vector()) == len(f1.vector())
def test_argument_equality(mesh, V, V2, W, W2):
"""Placed this test here because it's mainly about detecting differing
function spaces.
"""
mesh2 = UnitCubeMesh(8, 8, 8)
V3 = FunctionSpace(mesh2, 'CG', 1)
W3 = VectorFunctionSpace(mesh2, 'CG', 1)
for TF in (TestFunction, TrialFunction):
v = TF(V)
v2 = TF(V2)
v3 = TF(V3)
assert v == v2
assert v2 == v
assert V != V3
assert V2 != V3
assert not v == v3
assert not v2 == v3
assert v != v3
assert v2 != v3
assert v != v3
assert v2 != v3
w = TF(W)
w2 = TF(W2)
w3 = TF(W3)
assert w == w2
assert w2 == w
assert w != w3
assert w2 != w3
assert v != w
assert w != v
s1 = set((v, w))
s2 = set((v2, w2))
s3 = set((v, v2, w, w2))
assert len(s1) == 2
assert len(s2) == 2
assert len(s3) == 2
assert s1 == s2
assert s1 == s3
assert s2 == s3
# Test that the dolfin implementation of Argument.__eq__
# is triggered when comparing ufl expressions
assert grad(v) == grad(v2)
assert grad(v) != grad(v3)
def test_cell_mismatch(mesh):
"""Test that cell mismatch raises early enough from UFL"""
element = FiniteElement("P", triangle, 1)
with pytest.raises(UFLException):
FunctionSpace(mesh, element)
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