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test_xaccumulator.cpp
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test_xaccumulator.cpp
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/***************************************************************************
* Copyright (c) 2016, Johan Mabille, Sylvain Corlay and Wolf Vollprecht *
* *
* Distributed under the terms of the BSD 3-Clause License. *
* *
* The full license is in the file LICENSE, distributed with this software. *
****************************************************************************/
#include "gtest/gtest.h"
#include "xtensor/xaccumulator.hpp"
#include "xtensor/xarray.hpp"
#include "xtensor/xtensor.hpp"
#include "xtensor/xbuilder.hpp"
#include "xtensor/xmath.hpp"
#include "xtensor/xrandom.hpp"
#include "xtensor/xfixed.hpp"
namespace xt
{
TEST(xaccumulator, one_d)
{
xt::xarray<short> a = { short(1), short(2), short(3), short(4)};
xt::xarray<long> expected = { 1, 3, 6, 10};
auto no_axis = cumsum(a);
auto with_axis = cumsum(a, 0);
bool promotion_works = std::is_same<decltype(no_axis)::value_type, long long>::value;
EXPECT_TRUE(promotion_works);
EXPECT_TRUE(all(equal(no_axis, expected)));
EXPECT_TRUE(all(equal(with_axis, expected)));
}
TEST(xaccumulator, four_d)
{
xarray<double> arg_0 = {{{{ 0., 1., 2.},
{ 3., 4., 5.}},
{{ 6., 7., 8.},
{ 9.,10.,11.}},
{{12.,13.,14.},
{15.,16.,17.}}},
{{{18.,19.,20.},
{21.,22.,23.}},
{{24.,25.,26.},
{27.,28.,29.}},
{{30.,31.,32.},
{33.,34.,35.}}}};
auto res = cumsum(arg_0);
xarray<double> expected = { 0., 1., 3., 6., 10., 15., 21., 28., 36., 45., 55., 66., 78., 91.,
105.,120.,136.,153.,171.,190.,210.,231.,253.,276.,300.,325.,351.,378.,
406.,435.,465.,496.,528.,561.,595.,630.};
xarray<double> expected_col = { 0., 18., 24., 48., 60., 90., 93., 114., 123., 150., 165., 198.,
199., 218., 225., 250., 263., 294., 298., 320., 330., 358., 374., 408.,
410., 430., 438., 464., 478., 510., 515., 538., 549., 578., 595., 630.};
if (arg_0.layout() == layout_type::row_major)
{
EXPECT_TRUE(allclose(expected, res));
}
else
{
EXPECT_TRUE(allclose(expected_col, res));
}
auto res_0 = cumsum(arg_0, 0);
xarray<double> expected_0 = {{{{ 0., 1., 2.},
{ 3., 4., 5.}},
{{ 6., 7., 8.},
{ 9.,10.,11.}},
{{12.,13.,14.},
{15.,16.,17.}}},
{{{18.,20.,22.},
{24.,26.,28.}},
{{30.,32.,34.},
{36.,38.,40.}},
{{42.,44.,46.},
{48.,50.,52.}}}};
EXPECT_TRUE(all(equal(expected_0, res_0)));
auto res_1 = cumsum(arg_0, 1);
xarray<double> expected_1 = {{{{ 0., 1., 2.},
{ 3., 4., 5.}},
{{ 6., 8.,10.},
{12.,14.,16.}},
{{18.,21.,24.},
{27.,30.,33.}}},
{{{18.,19.,20.},
{21.,22.,23.}},
{{42.,44.,46.},
{48.,50.,52.}},
{{72.,75.,78.},
{81.,84.,87.}}}};
EXPECT_TRUE(all(equal(res_1, expected_1)));
auto res_2 = cumsum(arg_0, 2);
xarray<double> expected_2 = {{{{ 0., 1., 2.},
{ 3., 5., 7.}},
{{ 6., 7., 8.},
{15.,17.,19.}},
{{12.,13.,14.},
{27.,29.,31.}}},
{{{18.,19.,20.},
{39.,41.,43.}},
{{24.,25.,26.},
{51.,53.,55.}},
{{30.,31.,32.},
{63.,65.,67.}}}};
EXPECT_TRUE(all(equal(res_2, expected_2)));
auto res_3 = cumsum(arg_0, 3);
auto res_m1 = cumsum(arg_0, -1);
xarray<double> expected_3 = {{{{ 0., 1., 3.},
{ 3., 7., 12.}},
{{ 6., 13., 21.},
{ 9., 19., 30.}},
{{ 12., 25., 39.},
{ 15., 31., 48.}}},
{{{ 18., 37., 57.},
{ 21., 43., 66.}},
{{ 24., 49., 75.},
{ 27., 55., 84.}},
{{ 30., 61., 93.},
{ 33., 67.,102.}}}};
EXPECT_TRUE(allclose(expected_3, res_3));
EXPECT_TRUE(allclose(expected_3, res_m1));
}
TEST(xaccumulator, xtensor)
{
xtensor<double, 2> arr = {{1, 2, 3}, {4, 5, 6}};
auto res = xt::cumsum(arr, 0);
bool type_eq = std::is_same<xtensor<double, 2>, decltype(res)>::value;
EXPECT_TRUE(type_eq);
xtensor<double, 2> expected = {{1, 2, 3}, {5, 7, 9}};
EXPECT_EQ(expected, res);
}
TEST(xaccumulator, cumprod)
{
xarray<long> arg_0 = {{ 0, 1, 2},
{ 3, 4, 5},
{ 6, 7, 8},
{ 9,10,11}};
auto res = cumprod(arg_0);
xarray<long> expected = {0,0,0,0,0,0,0,0,0,0,0,0};
EXPECT_TRUE(allclose(expected, res));
auto res_0 = cumprod(arg_0, 0);
xarray<long> expected_0 = {{ 0, 1, 2},
{ 0, 4, 10},
{ 0, 28, 80},
{ 0, 280, 880}};
EXPECT_TRUE(allclose(expected_0, res_0));
auto res_1 = cumprod(arg_0, 1);
xarray<long> expected_1 = {{ 0, 0, 0},
{ 3, 12, 60},
{ 6, 42, 336},
{ 9, 90, 990}};
EXPECT_TRUE(allclose(expected_1, res_1));
}
TEST(xaccumulator, xfixed)
{
xtensor_fixed<float, xshape<2, 4, 3>> a = xt::random::rand<float>({2, 4, 3});
auto res = cumsum(a, 1);
bool truth = std::is_same<decltype(res), xtensor_fixed<double, xshape<2, 4, 3>>>::value;
EXPECT_TRUE(truth);
xtensor_fixed<long, xshape<4, 3>> arg_0({{ 0, 1, 2},
{ 3, 4, 5},
{ 6, 7, 8},
{ 9,10,11}});
auto res_0 = cumprod(arg_0, 0);
xarray<long> expected_0 = {{ 0, 1, 2},
{ 0, 4, 10},
{ 0, 28, 80},
{ 0, 280, 880}};
EXPECT_TRUE(expected_0 == res_0);
truth = std::is_same<typename decltype(res_0)::shape_type, xshape<4, 3>>::value;
EXPECT_TRUE(truth);
}
}