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/*
* (C) Copyright 1996- ECMWF.
*
* This software is licensed under the terms of the Apache Licence Version 2.0
* which can be obtained at http://www.apache.org/licenses/LICENSE-2.0.
*
* In applying this licence, ECMWF does not waive the privileges and immunities
* granted to it by virtue of its status as an intergovernmental organisation nor
* does it submit to any jurisdiction.
*/
#include <memory>
#include <utility>
#include <vector>
#include "eckit/geo/range/GaussianLatitude.h"
#include "eckit/geo/range/Regular.h"
#include "eckit/testing/Test.h"
#include "eckit/types/FloatCompare.h"
#define EXPECT_APPROX(a, b) EXPECT(::eckit::types::is_approximately_equal<double>((a), (b), 1e-3))
namespace eckit::geo::test {
CASE("range::RegularXY") {
SECTION("make_xy_range") {
range::RegularXY range(1., -1., 2., -1.);
EXPECT(range.size() == 4);
EXPECT_APPROX(range.a(), -1.);
EXPECT_APPROX(range.b(), 2.);
EXPECT_APPROX(range.increment(), 1.);
const auto& values = range.values();
EXPECT_APPROX(values[0], -1.);
EXPECT_APPROX(values[1], 0.);
EXPECT_APPROX(values[2], 1.);
EXPECT_APPROX(values[3], 2.);
}
}
CASE("range::RegularLongitude") {
SECTION("1") {
const range::RegularLongitude range(1., -1., 2.);
EXPECT(!range.periodic());
EXPECT(range.size() == 4);
EXPECT(range.a() == -1.);
EXPECT(range.b() == 2.);
const std::unique_ptr<range::RegularLongitude> cropped(range.make_cropped_range(0.5, 359.5));
EXPECT(!cropped->periodic());
EXPECT(cropped->size() == 2);
EXPECT(cropped->a() == 1.);
EXPECT(cropped->b() == 2.);
}
SECTION("2") {
const range::RegularLongitude range(1., 0.5, 359.5, 0.5);
EXPECT(range.periodic());
EXPECT(range.size() == 360);
const std::unique_ptr<range::RegularLongitude> cropped1(range.make_cropped_range(-1., 2.));
EXPECT(!cropped1->periodic());
EXPECT(cropped1->size() == 3);
}
SECTION("3") {
struct test {
double inc;
double a;
double b;
double ref;
bool periodic;
std::vector<double> values;
};
for (const auto& test : std::vector<test>{
{1., -1., 2., -1., false, {-1, 0, 1, 2}},
{90., -90., 90., 0., false, {-90, 0, 90}},
{-90., 90., -90., 0., false, {90, 0, -90}},
{90., -180., 180., 0., true, {-180, -90, 0, 90}},
{45., -180., 180., 0., true, {-180, -135, -90, -45, 0, 45, 90, 135}},
}) {
range::RegularLongitude range(test.inc, test.a, test.b, test.ref);
EXPECT(range.periodic() == test.periodic);
EXPECT(range.size() == test.values.size());
const auto& values = range.values();
EXPECT(values.size() == test.values.size());
for (auto a = test.values.begin(), b = values.begin(); a != test.values.end() && b != values.end();
++a, ++b) {
EXPECT_APPROX(*a, *b);
}
}
}
SECTION("4") {
struct test {
double inc;
double a;
double b;
double ref;
};
for (const auto& test : std::vector<test>{
{1., 0., 360., 0.},
{1., 0., 360., 0.},
{1., 0.5, 359.5, 0.5},
{1., 0., 360., 0.5},
}) {
range::RegularLongitude range(test.inc, test.a, test.b, test.ref);
EXPECT(range.periodic());
EXPECT(range.size() == 360);
}
}
SECTION("irregular") {
for (const auto inc : {0.35, 0.7, 0.8, 1.4, 1.6}) {
range::RegularLongitude range(inc, 0., 360.);
EXPECT(range.periodic());
EXPECT(range.shift() == 0.);
}
}
SECTION("degenerate") {
range::RegularLongitude range1(1., 1., 1.);
EXPECT(range1.size() == 1);
EXPECT(range1.values().front() == 1.);
range::RegularLongitude range2(2., 2., 2.);
EXPECT(range2.size() == 1);
EXPECT(range2.values().front() == 2.);
range::RegularLongitude range3(0., 2., 2.);
EXPECT(range3.size() == 1);
EXPECT(range3.values().front() == 2.);
range::RegularLongitude range4(0., 2., 2., 1.);
EXPECT(range4.size() == 1);
EXPECT(range4.values().front() == 2.);
}
SECTION("range [0, 360], cropped") {
range::RegularLongitude range(10., 0., 360.);
EXPECT(range.size() == 36);
EXPECT(range.a() == 0.);
EXPECT(range.b() == 360. - 10.);
EXPECT(range.periodic());
const std::unique_ptr<range::RegularLongitude> cropped1(range.make_cropped_range(-180., 180.));
EXPECT(cropped1->size() == 36);
EXPECT(cropped1->a() == -180.);
EXPECT(cropped1->b() == 180. - 10.);
EXPECT(cropped1->periodic());
const std::unique_ptr<range::RegularLongitude> cropped2(range.make_cropped_range(-180., 170.));
EXPECT(cropped2->size() == 36);
EXPECT(cropped2->b() == 170.);
EXPECT(cropped2->periodic());
const std::unique_ptr<range::RegularLongitude> cropped3(range.make_cropped_range(-180., 160.));
EXPECT(cropped3->size() == 36 - 1);
EXPECT(cropped3->b() == 160.);
EXPECT_NOT(cropped3->periodic());
}
SECTION("range [0, 180], cropped") {
range::RegularLongitude range(10., 0., 180.);
EXPECT(range.size() == 19);
EXPECT_NOT(range.periodic());
const std::unique_ptr<range::RegularLongitude> cropped1(range.make_cropped_range(1., 179.));
EXPECT(cropped1->size() == 19 - 2);
EXPECT(cropped1->a() == 10.);
EXPECT(cropped1->b() == 170.);
EXPECT_NOT(cropped1->periodic());
const std::unique_ptr<range::RegularLongitude> cropped2(range.make_cropped_range(1., 170.));
EXPECT(cropped2->size() == 19 - 2);
EXPECT(cropped2->a() == 10.);
EXPECT(cropped2->b() == 170.);
EXPECT_NOT(cropped2->periodic());
const std::unique_ptr<range::RegularLongitude> cropped3(range.make_cropped_range(-180., 180.));
EXPECT(cropped3->size() == 19);
EXPECT(cropped3->a() == 0.);
EXPECT(cropped3->b() == 180.);
EXPECT_NOT(cropped3->periodic());
const std::unique_ptr<range::RegularLongitude> cropped4(range.make_cropped_range(-190., 170.));
EXPECT(cropped4->size() == 19 - 1);
EXPECT(cropped4->a() == 0.);
EXPECT(cropped4->b() == 170.);
EXPECT_NOT(cropped4->periodic());
}
}
CASE("range::RegularLatitude") {
SECTION("simple") {
range::RegularLatitude range1(1., -90., 90., 0.5);
EXPECT(range1.size() == 180);
EXPECT(range1.a() == -89.5);
EXPECT(range1.b() == 89.5);
range::RegularLatitude range2(-1., 90., -90., 0.5);
EXPECT(range2.size() == 180);
EXPECT(range2.a() == 89.5);
EXPECT(range2.b() == -89.5);
}
SECTION("irregular") {
for (const auto inc : {0.35, 0.7, 0.8, 1.4, 1.6}) {
range::RegularLatitude range(inc, 0., 90.);
EXPECT(range.shift() == 0.);
}
}
}
CASE("range::GaussianLatitude") {
std::vector<double> ref{59.44440828916676, 19.87571914744090, -19.87571914744090, -59.44440828916676};
SECTION("decreasing") {
auto global = range::GaussianLatitude(2, false);
EXPECT(global.includesNorthPole() && global.includesSouthPole());
EXPECT(global.size() == ref.size());
size_t i = 0;
for (const auto& test : global.values()) {
EXPECT_APPROX(test, ref[i++]);
}
std::unique_ptr<range::GaussianLatitude> cropped1(global.make_cropped_range(50., -50.));
EXPECT(cropped1->size() == 2);
EXPECT_APPROX(cropped1->values()[0], ref[1]);
EXPECT_APPROX(cropped1->values()[1], ref[2]);
std::unique_ptr<range::GaussianLatitude> cropped2(global.make_cropped_range(59.445, -59.445));
std::unique_ptr<range::GaussianLatitude> cropped3(global.make_cropped_range(59.444, -59.444));
std::unique_ptr<range::GaussianLatitude> cropped4(global.make_cropped_range(59.444, -59.445));
EXPECT(cropped2->size() == 4);
EXPECT(cropped3->size() == 2);
EXPECT(cropped4->size() == 3);
std::unique_ptr<range::GaussianLatitude> cropped5(global.make_cropped_range(-59.444, -59.445));
EXPECT(cropped5->size() == 1);
EXPECT_APPROX(cropped5->values().front(), ref.back());
std::unique_ptr<range::GaussianLatitude> cropped6(global.make_cropped_range(90., 0.));
EXPECT(cropped6->size() == ref.size() / 2);
EXPECT_APPROX(cropped6->values()[0], ref[0]);
EXPECT_APPROX(cropped6->values()[1], ref[1]);
auto crop_includes_poles = [&global](double north, double south) {
std::unique_ptr<range::GaussianLatitude> cropped(
dynamic_cast<range::GaussianLatitude*>(global.make_cropped_range(north, south)));
ASSERT(cropped);
return std::make_pair(cropped->includesNorthPole(), cropped->includesSouthPole());
};
EXPECT(crop_includes_poles(70., -60.) == std::make_pair(true, true));
EXPECT(crop_includes_poles(60., -50.) == std::make_pair(true, false));
EXPECT(crop_includes_poles(50., -50.) == std::make_pair(false, false));
}
SECTION("increasing") {
std::vector<double> rev(ref.rbegin(), ref.rend());
auto global = range::GaussianLatitude(2, true);
EXPECT(global.size() == rev.size());
size_t i = 0;
for (const auto& test : global.values()) {
EXPECT_APPROX(test, rev[i++]);
}
std::unique_ptr<range::GaussianLatitude> cropped1(global.make_cropped_range(-50., 50.));
EXPECT(cropped1->size() == 2);
EXPECT_APPROX(cropped1->values()[0], rev[1]);
EXPECT_APPROX(cropped1->values()[1], rev[2]);
std::unique_ptr<range::GaussianLatitude> cropped2(global.make_cropped_range(-59.445, 59.445));
std::unique_ptr<range::GaussianLatitude> cropped3(global.make_cropped_range(-59.444, 59.444));
std::unique_ptr<range::GaussianLatitude> cropped4(global.make_cropped_range(-59.445, 59.444));
EXPECT(cropped2->size() == 4);
EXPECT(cropped3->size() == 2);
EXPECT(cropped4->size() == 3);
std::unique_ptr<range::GaussianLatitude> cropped5(global.make_cropped_range(-59.445, -59.444));
EXPECT(cropped5->size() == 1);
EXPECT_APPROX(cropped5->values().front(), rev.front());
std::unique_ptr<range::GaussianLatitude> cropped6(global.make_cropped_range(0., 90.));
EXPECT(cropped6->size() == rev.size() / 2);
EXPECT_APPROX(cropped6->values()[0], rev[2]);
EXPECT_APPROX(cropped6->values()[1], rev[3]);
auto crop_includes_poles = [&global](double north, double south) {
std::unique_ptr<range::GaussianLatitude> cropped(
dynamic_cast<range::GaussianLatitude*>(global.make_cropped_range(south, north)));
ASSERT(cropped);
return std::make_pair(cropped->includesNorthPole(), cropped->includesSouthPole());
};
EXPECT(crop_includes_poles(70., -60.) == std::make_pair(true, true));
EXPECT(crop_includes_poles(60., -50.) == std::make_pair(true, false));
EXPECT(crop_includes_poles(50., -50.) == std::make_pair(false, false));
}
}
CASE("range::Regular") {
struct test {
double inc;
size_t nlat;
size_t nlon;
};
for (const auto& test : std::vector<test>{
{30., 7, 12}, //
{10., 19, 36}, //
{5., 37, 72}, //
{2.5, 73, 144}, //
{2., 91, 180}, //
{1.8, 101, 200}, //
{1.6, 113, 225}, //
{1.5, 121, 240}, //
{1.4, 129, 258}, //
{1.25, 145, 288}, //
{1.2, 151, 300}, //
{1., 181, 360}, //
{0.9, 201, 400}, //
{0.8, 225, 450}, //
{0.75, 241, 480}, //
{0.7, 257, 515}, //
{0.6, 301, 600}, //
{0.5, 361, 720}, //
{0.4, 451, 900}, //
{0.35, 515, 1029}, //
{0.3, 601, 1200}, //
{0.25, 721, 1440}, //
{0.2, 901, 1800}, //
{0.15, 1201, 2400}, //
{0.125, 1441, 2880}, //
{0.1, 1801, 3600}, //
{0.05, 3601, 7200}, //
}) {
range::RegularLatitude lat(test.inc, -90., 90., 0.);
EXPECT_APPROX(lat.increment(), test.inc);
EXPECT_EQUAL(lat.size(), test.nlat);
range::RegularLongitude lon(test.inc, 0., 360., 0.);
EXPECT_APPROX(lon.increment(), test.inc);
EXPECT_EQUAL(lon.size(), test.nlon);
}
}
} // namespace eckit::geo::test
int main(int argc, char** argv) {
return eckit::testing::run_tests(argc, argv);
}
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