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"""Unit tests for Point interface"""
# Copyright (C) 2017 Jan Blechta
#
# 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
from pytest import approx
import numpy as np
from dolfin import *
def test_point_getitem():
p = Point(1, 2, 3)
assert p[0] == approx(1.0)
assert p[1] == approx(2.0)
assert p[2] == approx(3.0)
with pytest.raises(IndexError):
p[3]
assert np.all(p[:] == approx(np.array((1.0, 2.0, 3.0))))
def test_point_setitem():
p = Point()
p[0] = 6.0
assert p[0] == approx(6.0)
p[1] = 16.0
p[1] += 600.0
assert np.isclose(p[1], 616.0)
p[2] = 111.0
p[2] *= 12.0
p[2] /= 2
assert np.isclose(p[2], 666.0)
with pytest.raises(IndexError):
p[3] = 6666.0
p[:] = (0, 0, 0)
assert np.all(p[:] == 0)
p[:] = (1, 2, 3)
assert np.all(p[:] == (1, 2, 3))
p[:] += np.array((1, 2, 3))
assert np.all(p[:] == (2, 4, 6))
p[:] /= 2
assert np.all(p[:] == (1, 2, 3))
p[:] *= np.array((2., 2., 2.))
assert np.all(p[:] == (2, 4, 6))
def test_point_array():
p = Point(1, 2, 3)
assert np.all(p.array() == (1, 2, 3))
# Point.array() is a copy, no in-place modification
p.array()[:] += 1000.0
assert np.all(p.array() == (1, 2, 3))
def test_point_equality():
p = Point(1.23, 2, DOLFIN_PI)
q = Point(1.23, 2, DOLFIN_PI)
r = Point(1.23+DOLFIN_EPS, 2, DOLFIN_PI)
assert p == q
assert p != r
def test_point_dot():
p = Point(1.0, 2.0, 3.0)
q = Point(3.1, 4.5, 5.6)
r = Point(-1.6, -2.5, 3.3)
s = Point(152.25)
assert p.dot(q) == approx(p[0]*q[0] + p[1]*q[1] + p[2]*q[2])
assert p.dot(r) == approx(p[0]*r[0] + p[1]*r[1] + p[2]*r[2])
assert p.dot(s) == approx(p[0]*s[0])
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