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Copy pathtest_xbuilder.cpp
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709 lines (583 loc) · 23.2 KB
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/***************************************************************************
* Copyright (c) Johan Mabille, Sylvain Corlay and Wolf Vollprecht *
* Copyright (c) QuantStack *
* *
* Distributed under the terms of the BSD 3-Clause License. *
* *
* The full license is in the file LICENSE, distributed with this software. *
****************************************************************************/
#ifdef _MSC_VER
#define VS_SKIP_CONCATENATE_FIXED 1
#endif
#include <sstream>
#include "xtensor/containers/xarray.hpp"
#include "xtensor/containers/xfixed.hpp"
#include "xtensor/containers/xtensor.hpp"
#include "xtensor/generators/xbuilder.hpp"
#include "xtensor/io/xio.hpp"
#include "test_common.hpp"
namespace xt
{
using std::size_t;
using shape_t = std::vector<std::size_t>;
TEST(xbuilder, ones)
{
auto m = ones<double>({1, 2});
ASSERT_EQ(size_t(2), m.dimension());
ASSERT_EQ(1.0, m(0, 1));
xarray<double> m_assigned = m;
ASSERT_EQ(1.0, m_assigned(0, 1));
// assignment with narrowing type cast
// (check that the compiler doesn't issue a warning)
xarray<uint8_t> c = cast<uint8_t>(m);
ASSERT_EQ(1, c(0, 1));
}
TEST(xbuilder, like)
{
bool type_equal = false;
auto arr = xarray<int>::from_shape({3, 2, 5});
auto xfx = xtensor_fixed<int, xt::xshape<3, 3, 3>>();
auto onas = ones_like(arr);
EXPECT_EQ(onas.shape(), arr.shape());
type_equal = std::is_same<typename decltype(onas)::value_type, int>::value;
EXPECT_TRUE(type_equal);
type_equal = std::is_same<typename decltype(onas)::shape_type, xt::dynamic_shape<std::size_t>>::value;
EXPECT_TRUE(type_equal);
EXPECT_EQ(onas(1, 1), 1);
auto zeras = zeros_like(arr);
EXPECT_EQ(zeras.shape(), arr.shape());
type_equal = std::is_same<typename decltype(zeras)::value_type, int>::value;
EXPECT_TRUE(type_equal);
EXPECT_EQ(zeras(1, 1), 0);
auto empty = empty_like(arr);
EXPECT_EQ(empty.shape(), arr.shape());
type_equal = std::is_same<typename decltype(empty)::value_type, int>::value;
EXPECT_TRUE(type_equal);
auto full = full_like(arr, 123);
EXPECT_EQ(full.shape(), arr.shape());
type_equal = std::is_same<typename decltype(full)::value_type, int>::value;
EXPECT_TRUE(type_equal);
EXPECT_EQ(full(1, 1), 123);
auto f_xfx = full_like(xfx, 2332);
EXPECT_EQ(f_xfx(0, 2), 2332);
}
TEST(xbuilder, arange_simple)
{
auto ls = arange<double>(50);
ASSERT_EQ(ls.dimension(), size_t(1));
decltype(ls)::shape_type expected_shape = {50};
ASSERT_EQ(ls.shape(), expected_shape);
ASSERT_EQ(ls[{0}], 0);
auto ls_49 = ls(49);
ASSERT_EQ(49, ls_49);
ASSERT_EQ(ls(29), 29);
xarray<double> m_assigned = ls;
ASSERT_EQ(m_assigned.dimension(), size_t(1));
ASSERT_EQ(m_assigned.shape()[0], size_t(50));
ASSERT_EQ(m_assigned[{0}], 0);
ASSERT_EQ(m_assigned[{49}], 49);
ASSERT_EQ(m_assigned[{29}], 29);
xarray<double> b({2, 50}, 1.);
xarray<double> res = b + ls;
ASSERT_EQ(50, res(1, 49));
}
TEST(xbuilder, arange_reshape)
{
auto rs0 = arange<double>(50).reshape({std::size_t(5), std::size_t(10)});
auto rs1 = arange<double>(50).reshape({-1, 10});
auto gen0 = arange<double>(50);
auto ls0 = gen0.reshape({std::size_t(5), std::size_t(10)});
auto gen1 = arange<double>(50);
auto ls1 = gen1.reshape({-1, 10});
decltype(ls0)::shape_type expected_shape = {5, 10};
EXPECT_EQ(rs0.shape(), expected_shape);
EXPECT_EQ(rs1.shape(), expected_shape);
EXPECT_EQ(ls0.shape(), expected_shape);
EXPECT_EQ(ls1.shape(), expected_shape);
EXPECT_EQ(rs0(4, 9), 49);
EXPECT_EQ(rs1(4, 9), 49);
EXPECT_EQ(ls0(4, 9), 49);
EXPECT_EQ(ls1(4, 9), 49);
}
TEST(xbuilder, arange_min_max)
{
auto ls = arange<unsigned int>(10u, 20u);
ASSERT_EQ(ls.dimension(), size_t(1));
decltype(ls)::shape_type expected_shape = {10};
ASSERT_EQ(ls.shape(), expected_shape);
ASSERT_EQ(ls[{0}], 10u);
ASSERT_EQ(ls(9), 19u);
ASSERT_EQ(ls(2), 12u);
xarray<unsigned int> m_assigned = ls;
ASSERT_EQ(m_assigned.dimension(), size_t(1));
ASSERT_EQ(m_assigned.shape()[0], size_t(10));
ASSERT_EQ(m_assigned[{0}], 10u);
ASSERT_EQ(m_assigned[{9}], 19u);
ASSERT_EQ(m_assigned[{2}], 12u);
auto lc = arange<char>('a', 'd');
decltype(lc)::shape_type expected_shape_2 = {3};
ASSERT_EQ(lc.shape(), expected_shape_2);
ASSERT_EQ(lc[{0}], 'a');
ASSERT_EQ(lc[{1}], 'b');
ASSERT_EQ(lc[{2}], 'c');
}
TEST(xbuilder, arange_min_max_step)
{
auto ls = arange<float>(10, 20, 0.5f);
ASSERT_EQ(ls.dimension(), size_t(1));
decltype(ls)::shape_type expected_shape = {20};
ASSERT_EQ(ls.shape(), expected_shape);
ASSERT_EQ(ls[{0}], 10.f);
ASSERT_EQ(ls(10), 15.f);
ASSERT_EQ(ls(3), 11.5f);
xarray<float> m_assigned = ls;
ASSERT_EQ(m_assigned.dimension(), size_t(1));
ASSERT_EQ(m_assigned.shape()[0], size_t(20));
ASSERT_EQ(m_assigned[{0}], 10.f);
ASSERT_EQ(m_assigned(10), 15.f);
ASSERT_EQ(m_assigned(3), 11.5f);
auto l3 = arange<float>(0, 0.99f, 0.25f);
decltype(l3)::shape_type expected_shape_2 = {4};
ASSERT_EQ(l3.shape(), expected_shape_2);
ASSERT_EQ(l3[{0}], 0.f);
ASSERT_EQ(0.25f * 3.f, l3[{3}]);
auto l4 = arange<int>(0, 10, 3);
ASSERT_EQ(l4.shape(), expected_shape_2);
ASSERT_EQ(l4[{0}], 0);
ASSERT_EQ(l4[{1}], 3);
ASSERT_EQ(l4[{2}], 6);
ASSERT_EQ(l4[{3}], 9);
}
TEST(xbuilder, arange_reverse)
{
auto a0 = arange(6, 5, -1);
EXPECT_EQ(a0.dimension(), size_t(1));
decltype(a0)::shape_type expected_shape0 = {1};
EXPECT_EQ(a0.shape(), expected_shape0);
EXPECT_EQ(a0(0), 6);
auto a1 = arange(8, 5, -1);
EXPECT_EQ(a1.dimension(), size_t(1));
decltype(a1)::shape_type expected_shape1 = {3};
EXPECT_EQ(a1.shape(), expected_shape1);
EXPECT_EQ(a1(0), 8);
EXPECT_EQ(a1(1), 7);
EXPECT_EQ(a1(2), 6);
auto a2 = arange(5, 6, -1);
EXPECT_EQ(a2.dimension(), size_t(1));
decltype(a2)::shape_type expected_shape2 = {0};
EXPECT_EQ(a2.shape(), expected_shape2);
auto a3 = arange(8, 5, 1);
EXPECT_EQ(a3.dimension(), size_t(1));
decltype(a3)::shape_type expected_shape3 = {0};
EXPECT_EQ(a3.shape(), expected_shape3);
}
TEST(xbuilder, linspace)
{
auto ls = linspace<float>(20.f, 50.f);
ASSERT_EQ(ls.dimension(), size_t(1));
decltype(ls)::shape_type expected_shape = {50};
ASSERT_EQ(ls.shape(), expected_shape);
ASSERT_EQ(ls[{0}], 20.f);
ASSERT_EQ(ls(49), 50.f);
float at_3 = 20 + 3 * (50.f - 20.f) / (50.f - 1.f);
ASSERT_EQ(ls(3), at_3);
xarray<float> m_assigned = ls;
ASSERT_EQ(m_assigned.dimension(), size_t(1));
ASSERT_EQ(m_assigned.shape()[0], size_t(50));
ASSERT_EQ(m_assigned[{0}], 20.f);
ASSERT_EQ(m_assigned(49), 50.f);
ASSERT_EQ(m_assigned(3), at_3);
}
TEST(xbuilder, linspace_reshape)
{
xarray<double> a = linspace<double>(20., 50.).reshape({5, 10});
EXPECT_EQ(a.dimension(), size_t(2));
decltype(a)::shape_type expected_shape = {5, 10};
EXPECT_EQ(a.shape(), expected_shape);
EXPECT_EQ(a(0, 0), 20.);
EXPECT_EQ(a(4, 9), 50.);
}
TEST(xbuilder, linspace_1_point)
{
xt::xarray<double> a = linspace<double>(0., 0., 1, false);
decltype(a)::shape_type expected_shape = {1};
EXPECT_EQ(a.dimension(), size_t(1));
EXPECT_EQ(a.shape(), expected_shape);
EXPECT_EQ(0., a(0));
xt::xarray<double> b = linspace<double>(0., 0., 1, true);
EXPECT_EQ(b.dimension(), size_t(1));
EXPECT_EQ(b.shape(), expected_shape);
EXPECT_EQ(0., b(0));
xt::xarray<double> c = linspace<double>(0., 2., 1, true);
EXPECT_EQ(c.dimension(), size_t(1));
EXPECT_EQ(c.shape(), expected_shape);
EXPECT_EQ(0., c(0));
auto d = linspace<double>(0., 2., 1, true);
EXPECT_EQ(c, d);
}
TEST(xbuilder, linspace_n_samples_endpoint)
{
auto ls = linspace<float>(20.f, 50.f, 100, false);
ASSERT_EQ(ls.dimension(), size_t(1));
decltype(ls)::shape_type expected_shape = {100};
ASSERT_EQ(ls.shape(), expected_shape);
ASSERT_EQ(ls[{0}], 20.f);
float at_end = 49.7f;
ASSERT_EQ(ls(99), at_end);
float at_3 = 20.9f;
ASSERT_EQ(ls(3), at_3);
xarray<float> m_assigned = ls;
ASSERT_EQ(m_assigned.dimension(), size_t(1));
ASSERT_EQ(m_assigned.shape()[0], size_t(100));
ASSERT_EQ(m_assigned[{0}], 20.f);
ASSERT_EQ(m_assigned(99), at_end);
ASSERT_EQ(m_assigned(3), at_3);
}
TEST(xbuilder, linspace_endpoint)
{
double at_end = 99.78730976641236;
xt::xtensor<double, 1> ls = linspace<double>(0., at_end, 100);
ASSERT_EQ(ls(99), at_end);
}
TEST(xbuilder, linspace_integer)
{
xarray<int> ls = linspace<int>(0, 10, 13);
xarray<int> expected = {0, 0, 1, 2, 3, 4, 5, 5, 6, 7, 8, 9, 10};
ASSERT_TRUE(all(equal(ls, expected)));
}
TEST(xbuilder, linspace_double)
{
// access_imp will also be tested here
double at_end = 99.78730976641236;
xt::xarray<double> a = xt::linspace(0., at_end, 100);
auto b = xt::linspace(0., at_end, 100);
EXPECT_TENSOR_EQ(a, b);
}
TEST(xbuilder, logspace)
{
auto ls = logspace<double>(2., 3., 4);
ASSERT_EQ(ls.dimension(), size_t(1));
decltype(ls)::shape_type expected_shape = {4};
ASSERT_EQ(ls.shape(), expected_shape);
ASSERT_EQ(ls[{0}], 100);
double at_1 = std::pow(10.0, (2.0 + 1.0 / 3.0));
ASSERT_EQ(ls(1), at_1);
ASSERT_EQ(ls(3), 1000);
xarray<double> m_assigned = ls;
ASSERT_EQ(m_assigned.dimension(), size_t(1));
ASSERT_EQ(m_assigned.shape()[0], size_t(4));
ASSERT_EQ(m_assigned[{0}], 100);
ASSERT_EQ(m_assigned(1), at_1);
ASSERT_EQ(m_assigned(3), 1000);
}
TEST(xbuilder, eye)
{
auto e = eye(5);
ASSERT_EQ(size_t(2), e.dimension());
decltype(e)::shape_type expected_shape = {5, 5};
ASSERT_EQ(expected_shape, e.shape());
ASSERT_TRUE(e(1, 1));
xindex idx({1, 0});
ASSERT_FALSE(e[idx]);
xarray<bool> m_assigned = e;
ASSERT_TRUE(m_assigned(2, 2));
ASSERT_FALSE(m_assigned(4, 2));
xindex idx2({2, 2});
ASSERT_TRUE(e.element(idx2.begin(), idx2.end()));
ASSERT_TRUE(e[idx2]);
ASSERT_TRUE((e[{2, 2}]));
auto e2 = eye(5, -1);
EXPECT_TRUE(e2(1, 0));
EXPECT_FALSE(e2(0, 0));
}
TEST(xbuilder, concatenate)
{
xarray<double> a = {{{0, 1, 2}, {3, 4, 5}}, {{6, 7, 8}, {9, 10, 11}}};
auto c = concatenate(xtuple(a, a, a), 2);
shape_t expected_shape = {2, 2, 9};
ASSERT_EQ(expected_shape, c.shape());
ASSERT_EQ(c(1, 1, 2), c(1, 1, 5));
ASSERT_EQ(11, c(1, 1, 2));
ASSERT_EQ(11, c(1, 1, 5));
xarray<double> e = {{1, 2, 3}};
xarray<double> f = {{2, 3, 4}};
xarray<double> k = concatenate(xtuple(e, f));
xarray<double> l = concatenate(xtuple(e, f), 1);
shape_t ex_k = {2, 3};
shape_t ex_l = {1, 6};
ASSERT_EQ(ex_k, k.shape());
ASSERT_EQ(ex_l, l.shape());
ASSERT_EQ(4, k(1, 2));
ASSERT_EQ(3, l(0, 2));
ASSERT_EQ(3, l(0, 4));
auto t = concatenate(xtuple(arange(2), arange(2, 5), arange(5, 8)));
ASSERT_TRUE(arange(8) == t);
xt::xarray<double> fa = xt::ones<double>({3, 4, 5, 0});
xt::xarray<double> sa = xt::ones<double>({3, 4, 5});
xt::xarray<double> ta = xt::ones<double>({3, 4, 5, 3});
XT_EXPECT_ANY_THROW(xt::concatenate(xt::xtuple(fa, sa)));
XT_EXPECT_ANY_THROW(xt::concatenate(xt::xtuple(fa, ta)));
}
template <std::size_t... I, std::size_t... J>
bool operator==(fixed_shape<I...>, fixed_shape<J...>)
{
std::array<std::size_t, sizeof...(I)> ix = {I...};
std::array<std::size_t, sizeof...(J)> jx = {J...};
return sizeof...(J) == sizeof...(I) && std::equal(ix.begin(), ix.end(), jx.begin());
}
#ifndef VS_SKIP_CONCATENATE_FIXED
// This test mimics the relevant parts of `TEST(xbuilder, concatenate)`
TEST(xbuilder, concatenate_fixed)
{
xtensor_fixed<double, fixed_shape<2, 2, 3>> a = {{{0, 1, 2}, {3, 4, 5}}, {{6, 7, 8}, {9, 10, 11}}};
auto c = concatenate<2>(xtuple(a, a, a));
using expected_shape_c_t = fixed_shape<2, 2, 9>;
ASSERT_EQ(expected_shape_c_t{}, c.shape());
ASSERT_EQ(c(1, 1, 2), c(1, 1, 5));
ASSERT_EQ(11, c(1, 1, 2));
ASSERT_EQ(11, c(1, 1, 5));
xtensor_fixed<double, fixed_shape<1, 3>> e = {{1, 2, 3}}, f = {{2, 3, 4}};
auto k = concatenate<0>(xtuple(e, f));
auto l = concatenate<1>(xtuple(e, f));
using expected_shape_k_t = fixed_shape<2, 3>;
using expected_shape_l_t = fixed_shape<1, 6>;
ASSERT_EQ(expected_shape_k_t{}, k.shape());
ASSERT_EQ(expected_shape_l_t{}, l.shape());
ASSERT_EQ(4, k(1, 2));
ASSERT_EQ(3, l(0, 2));
ASSERT_EQ(3, l(0, 4));
xtensor_fixed<double, fixed_shape<2>> x = arange(2);
xtensor_fixed<double, fixed_shape<3>> y = arange(2, 5);
xtensor_fixed<double, fixed_shape<3>> z = arange(5, 8);
auto w1 = concatenate<0>(xtuple(x, y, z));
auto w2 = concatenate(xtuple(x, y, z), 0);
ASSERT_TRUE(arange(8) == w1);
ASSERT_TRUE(w1 == w2);
}
TEST(xbuilder, vstack_fixed)
{
xtensor_fixed<float, fixed_shape<1, 2>> a = {{1.f, 2.f}};
xtensor_fixed<float, fixed_shape<2, 2>> b = {{3.f, 4.f}, {5.f, 6.f}};
auto c = vstack(xtuple(a, b));
using expected_shape_t = fixed_shape<3, 2>;
ASSERT_EQ(expected_shape_t{}, c.shape());
EXPECT_EQ(1.f, c(0, 0));
EXPECT_EQ(2.f, c(0, 1));
EXPECT_EQ(3.f, c(1, 0));
EXPECT_EQ(6.f, c(2, 1));
}
#endif
TEST(xbuilder, access)
{
xarray<double> a = {{{0, 1, 2}, {3, 4, 5}}, {{6, 7, 8}, {9, 10, 11}}};
auto c = concatenate(xtuple(a, a, a), 2);
EXPECT_EQ(c(2, 3, 1, 1, 2), c(1, 1, 2));
}
TEST(xbuilder, unchecked)
{
auto ls = linspace<float>(20.f, 50.f, 100, false);
EXPECT_EQ(ls.unchecked(10), ls(10));
}
TEST(xbuilder, stack)
{
xarray<double> a = {{{0, 1, 2}, {3, 4, 5}}, {{6, 7, 8}, {9, 10, 11}}};
auto c = stack(xtuple(a, a, a), 2);
shape_t expected_shape = {2, 2, 3, 3};
ASSERT_EQ(expected_shape, c.shape());
ASSERT_EQ(c(1, 1, 0, 2), c(1, 1, 1, 2));
ASSERT_EQ(c(1, 1, 0, 2), c(1, 1, 2, 2));
ASSERT_EQ(11, c(1, 1, 1, 2));
ASSERT_EQ(11, c(1, 1, 2, 2));
xarray<double> e = arange(1, 4);
xarray<double> f = {2, 3, 4};
xarray<double> k = stack(xtuple(e, f));
xarray<double> l = stack(xtuple(e, f), 1);
shape_t ex_k = {2, 3};
shape_t ex_l = {3, 2};
ASSERT_EQ(ex_k, k.shape());
ASSERT_EQ(ex_l, l.shape());
ASSERT_EQ(4, k(1, 2));
ASSERT_EQ(3, l(1, 1));
ASSERT_EQ(3, l(2, 0));
auto t = stack(xtuple(arange(3), arange(3, 6), arange(6, 9)));
xarray<double> ar = {{0, 1, 2}, {3, 4, 5}, {6, 7, 8}};
ASSERT_TRUE(t == ar);
}
TEST(xbuilder, hstack)
{
xarray<int> a0 = {1, 2, 3};
xarray<int> b0 = {2, 3, 4};
xarray<int> e0 = {1, 2, 3, 2, 3, 4};
auto c0 = hstack(xtuple(a0, b0));
EXPECT_EQ(c0, e0);
xarray<int> a1 = a0;
a1.reshape({3, 1});
xarray<int> b1 = b0;
b1.reshape({3, 1});
xarray<int> e1 = {{1, 2}, {2, 3}, {3, 4}};
auto c1 = hstack(xtuple(a1, b1));
EXPECT_EQ(c1, e1);
xarray<int> a2 = {{1, 2, 3}, {4, 5, 6}};
xarray<int> b2 = {{7, 8}, {9, 10}};
xarray<int> e2 = {{1, 2, 3, 7, 8}, {4, 5, 6, 9, 10}};
auto c2 = hstack(xtuple(a2, b2));
}
TEST(xbuilder, vstack)
{
xarray<int> a0 = {1, 2, 3};
xarray<int> b0 = {2, 3, 4};
xarray<int> e0 = {{1, 2, 3}, {2, 3, 4}};
auto c0 = vstack(xtuple(a0, b0));
EXPECT_EQ(c0, e0);
xarray<int> a1 = a0;
a1.reshape({3, 1});
xarray<int> b1 = b0;
b1.reshape({3, 1});
xarray<int> e1 = {1, 2, 3, 2, 3, 4};
e1.reshape({6, 1});
auto c1 = vstack(xtuple(a1, b1));
EXPECT_EQ(c1, e1);
xarray<int> a2 = {{1, 2, 3}, {4, 5, 6}, {7, 8, 9}};
xarray<int> b2 = {{10, 11, 12}};
xarray<int> e2 = {{1, 2, 3}, {4, 5, 6}, {7, 8, 9}, {10, 11, 12}};
auto c2 = vstack(xtuple(a2, b2));
EXPECT_EQ(c2, e2);
}
TEST(xbuilder, meshgrid)
{
auto mesh = meshgrid(linspace<double>(0.0, 1.0, 3), linspace<double>(0.0, 1.0, 2));
xarray<double> expect0 = {{0, 0}, {0.5, 0.5}, {1, 1}};
xarray<double> expect1 = {{0, 1}, {0, 1}, {0, 1}};
ASSERT_TRUE(all(equal(std::get<0>(mesh), expect0)));
ASSERT_TRUE(all(equal(std::get<1>(mesh), expect1)));
}
TEST(xbuilder, meshgrid_arange)
{
auto xrange = xt::arange(0, 2);
auto yrange = xt::arange(0, 2);
auto grid = xt::meshgrid(xrange, yrange);
std::ostringstream stream;
stream << std::get<0>(grid) << std::endl;
}
TEST(xbuilder, triu)
{
xarray<double> e = {{1, 2, 3}, {4, 5, 6}, {7, 8, 9}};
xarray<double> t = xt::triu(e);
xarray<double> expected = {{1, 2, 3}, {0, 5, 6}, {0, 0, 9}};
xarray<double> expected_2 = {{1, 2, 3}, {4, 5, 6}, {0, 8, 9}};
xarray<double> expected_3 = {{0, 2, 3}, {0, 0, 6}, {0, 0, 0}};
ASSERT_EQ(size_t(2), t.dimension());
shape_t expected_shape = {3, 3};
ASSERT_EQ(expected_shape, t.shape());
ASSERT_EQ(expected, t);
xarray<double> t3 = xt::triu(e, 1);
ASSERT_EQ(expected_3, t3);
xarray<double> t2 = xt::triu(e, -1);
ASSERT_EQ(expected_2, t2);
}
TEST(xbuilder, tril)
{
xarray<double> e = {{1, 2, 3}, {4, 5, 6}, {7, 8, 9}};
xarray<double> t = xt::tril(e);
xarray<double> expected = {{1, 0, 0}, {4, 5, 0}, {7, 8, 9}};
xarray<double> expected_2 = {{1, 2, 0}, {4, 5, 6}, {7, 8, 9}};
xarray<double> expected_3 = {{0, 0, 0}, {4, 0, 0}, {7, 8, 0}};
ASSERT_EQ(size_t(2), t.dimension());
shape_t expected_shape = {3, 3};
ASSERT_EQ(expected_shape, t.shape());
ASSERT_EQ(expected, t);
xarray<double> t2 = xt::tril(e, 1);
ASSERT_EQ(expected_2, t2);
xarray<double> t3 = xt::tril(e, -1);
ASSERT_EQ(expected_3, t3);
}
TEST(xbuilder, diagonal)
{
xarray<double> e = {{1, 2, 3}, {4, 5, 6}, {7, 8, 9}};
xarray<double> t = xt::diagonal(e);
xarray<double> expected = {1, 5, 9};
ASSERT_EQ(expected, t);
xt::xarray<double> f = {{0, 1, 2}, {3, 4, 5}, {6, 7, 8}, {9, 10, 11}};
xarray<double> exp_1 = {1, 5};
ASSERT_TRUE(all(equal(exp_1, xt::diagonal(f, 1))));
xarray<double> exp_2 = {0, 4, 8};
EXPECT_EQ(exp_2, xt::diagonal(f));
xarray<double> exp_3 = {3, 7, 11};
EXPECT_EQ(exp_3, xt::diagonal(f, -1));
xarray<double> exp_4 = {6, 10};
EXPECT_EQ(exp_4, xt::diagonal(f, -2));
}
TEST(xbuilder, diagonal_advanced)
{
xarray<double> e = {
{{{0, 1, 2}, {3, 4, 5}}, {{6, 7, 8}, {9, 10, 11}}},
{{{12, 13, 14}, {15, 16, 17}}, {{18, 19, 20}, {21, 22, 23}}}
};
xarray<double> d1 = xt::diagonal(e);
xarray<double> expected = {{{0, 18}, {1, 19}, {2, 20}}, {{3, 21}, {4, 22}, {5, 23}}};
ASSERT_EQ(expected, d1);
std::vector<double> d2 = {6, 7, 8, 9, 10, 11};
xarray<double> expected_2;
expected_2.resize({2, 3, 1});
std::copy(d2.begin(), d2.end(), expected_2.template begin<layout_type::row_major>());
xarray<double> t2 = xt::diagonal(e, 1);
ASSERT_EQ(expected_2, t2);
std::vector<double> d3 = {3, 9, 15, 21};
xarray<double> expected_3;
expected_3.resize({2, 2, 1});
std::copy(d3.begin(), d3.end(), expected_3.template begin<layout_type::row_major>());
xarray<double> t3 = xt::diagonal(e, -1, 2, 3);
ASSERT_EQ(expected_3, t3);
}
TEST(xbuilder, diag)
{
xarray<double> e = {{1, 2, 3}, {4, 5, 6}, {7, 8, 9}};
xarray<double> t = xt::diag(xt::diagonal(e));
xarray<double> expected = xt::eye(3) * e;
ASSERT_EQ(expected, t);
}
TEST(xbuilder, arange_broadcast)
{
auto a = arange<int>(1);
xarray<int> b = {1, 2, 3};
xarray<int> res = a + b;
EXPECT_EQ(res, b);
}
TEST(xbuilder, empty)
{
bool b = false;
auto e1 = empty<double>({3, 4, 1});
b = std::is_same<decltype(e1), xtensor<double, 3>>::value;
EXPECT_TRUE(b);
b = std::is_same<
decltype(empty<int, layout_type::column_major>({3, 3, 3})),
xtensor<int, 3, layout_type::column_major>>::value;
EXPECT_TRUE(b);
auto es = empty<double>(std::array<std::size_t, 3>{3, 4, 1});
b = std::is_same<decltype(es), xtensor<double, 3>>::value;
EXPECT_TRUE(b);
auto e2 = empty<double>(xshape<3, 3, 3>());
b = std::is_same<decltype(e2), xtensor_fixed<double, xshape<3, 3, 3>>>::value;
EXPECT_TRUE(b);
auto shapef = xshape<3, 2>();
auto e22 = empty<double, layout_type::column_major>(shapef);
b = std::is_same<decltype(e22), xtensor_fixed<double, xshape<3, 2>, layout_type::column_major>>::value;
EXPECT_TRUE(b);
xt::dynamic_shape<std::size_t> sd = {3, 2, 1};
auto ed1 = empty<double>(sd);
// TODO : The ed2 expression do not work on MSVC due to bad deduction since cpp20. We need to fix it for MSVC.
#if defined(_MSVC_LANG)
using ShapeType = xt::dynamic_shape<std::size_t>;
auto ed2 = empty<double, xt::layout_type::column_major, ShapeType>(ShapeType({3, 3, 3}));
#else
auto ed2 = empty<double, xt::layout_type::column_major>(xt::dynamic_shape<std::size_t>({3, 3, 3}));
#endif
auto ed3 = empty<double>(std::vector<std::size_t>({3, 3, 3}));
b = std::is_same<decltype(ed1), xarray<double>>::value;
EXPECT_TRUE(b);
b = std::is_same<decltype(ed2), xarray<double, layout_type::column_major>>::value;
EXPECT_TRUE(b);
b = std::is_same<decltype(ed3), xarray<double>>::value;
EXPECT_TRUE(b);
}
}
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