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test_fftfreq.cpp
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rTAMAAS tamaas
test_fftfreq.cpp
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/**
* @file
* @section LICENSE
*
* Copyright (©) 2016-2020 EPFL (École Polytechnique Fédérale de Lausanne),
* Laboratory (LSMS - Laboratoire de Simulation en Mécanique des Solides)
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published
* by the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*
*/
/* -------------------------------------------------------------------------- */
#include "fft_engine.hh"
#include "fftransform.hh"
#include "grid.hh"
#include "grid_hermitian.hh"
#include "grid_view.hh"
#include "test.hh"
#include <pybind11/embed.h>
#include <pybind11/numpy.h>
#include <pybind11/pybind11.h>
using
namespace
tamaas
;
namespace
py
=
pybind11
;
/* -------------------------------------------------------------------------- */
TEST
(
TestFFTInterface
,
Frequencies1D
)
{
std
::
array
<
UInt
,
1
>
sizes
=
{{
10
}};
auto
freq
=
FFTransform
<
Real
,
1
>::
computeFrequencies
<
false
>
(
sizes
);
py
::
module
fftfreq
=
py
::
module
::
import
(
"fftfreq"
);
std
::
vector
<
Real
>
reference
(
freq
.
dataSize
());
py
::
array
py_arg
(
reference
.
size
(),
reference
.
data
(),
py
::
none
());
fftfreq
.
attr
(
"frequencies1D"
)(
py_arg
);
ASSERT_TRUE
(
compare
(
reference
,
freq
,
AreFloatEqual
()))
<<
"Non hermitian frequencies are wrong"
;
auto
hfreq
=
FFTransform
<
Real
,
1
>::
computeFrequencies
<
true
>
(
sizes
);
std
::
iota
(
reference
.
begin
(),
reference
.
end
(),
0
);
ASSERT_TRUE
(
compare
(
reference
,
hfreq
,
AreFloatEqual
()))
<<
"Hermitian frequencies are wrong"
;
}
TEST
(
TestFFTInterface
,
Frequencies2D
)
{
std
::
array
<
UInt
,
2
>
sizes
=
{{
10
,
10
}};
auto
freq
=
FFTransform
<
Real
,
2
>::
computeFrequencies
<
false
>
(
sizes
);
py
::
module
fftfreq
=
py
::
module
::
import
(
"fftfreq"
);
std
::
vector
<
Real
>
reference
(
freq
.
dataSize
());
py
::
array
py_arg
({
10
,
10
,
2
},
reference
.
data
(),
py
::
none
());
fftfreq
.
attr
(
"frequencies2D"
)(
py_arg
);
ASSERT_TRUE
(
compare
(
reference
,
freq
,
AreFloatEqual
()))
<<
"Non hermitian frequencies are wrong"
;
auto
hfreq
=
FFTransform
<
Real
,
2
>::
computeFrequencies
<
true
>
(
sizes
);
fftfreq
.
attr
(
"hfrequencies2D"
)(
py_arg
);
ASSERT_TRUE
(
compare
(
reference
,
hfreq
,
AreFloatEqual
()))
<<
"Hermitian frequencies are wrong"
;
}
TEST
(
TestFFTEngine
,
Frequencies1D
)
{
std
::
array
<
UInt
,
1
>
sizes
=
{{
10
}};
auto
freq
=
FFTEngine
::
computeFrequencies
<
Real
,
1
,
false
>
(
sizes
);
py
::
module
fftfreq
=
py
::
module
::
import
(
"fftfreq"
);
std
::
vector
<
Real
>
reference
(
freq
.
dataSize
());
py
::
array
py_arg
(
reference
.
size
(),
reference
.
data
(),
py
::
none
());
fftfreq
.
attr
(
"frequencies1D"
)(
py_arg
);
ASSERT_TRUE
(
compare
(
reference
,
freq
,
AreFloatEqual
()))
<<
"Non hermitian frequencies are wrong"
;
auto
hfreq
=
FFTEngine
::
computeFrequencies
<
Real
,
1
,
true
>
(
sizes
);
std
::
iota
(
reference
.
begin
(),
reference
.
end
(),
0
);
ASSERT_TRUE
(
compare
(
reference
,
hfreq
,
AreFloatEqual
()))
<<
"Hermitian frequencies are wrong"
;
}
TEST
(
TestFFTEngine
,
Frequencies2D
)
{
std
::
array
<
UInt
,
2
>
sizes
=
{{
10
,
10
}};
auto
freq
=
FFTEngine
::
computeFrequencies
<
Real
,
2
,
false
>
(
sizes
);
py
::
module
fftfreq
=
py
::
module
::
import
(
"fftfreq"
);
std
::
vector
<
Real
>
reference
(
freq
.
dataSize
());
py
::
array
py_arg
({
10
,
10
,
2
},
reference
.
data
(),
py
::
none
());
fftfreq
.
attr
(
"frequencies2D"
)(
py_arg
);
ASSERT_TRUE
(
compare
(
reference
,
freq
,
AreFloatEqual
()))
<<
"Non hermitian frequencies are wrong"
;
auto
hfreq
=
FFTEngine
::
computeFrequencies
<
Real
,
2
,
true
>
(
sizes
);
fftfreq
.
attr
(
"hfrequencies2D"
)(
py_arg
);
ASSERT_TRUE
(
compare
(
reference
,
hfreq
,
AreFloatEqual
()))
<<
"Hermitian frequencies are wrong"
;
}
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