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102 lines
4 KiB
C++
102 lines
4 KiB
C++
//
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// Copyright 2020 Ettus Research, a National Instruments Brand
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//
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// SPDX-License-Identifier: GPL-3.0-or-later
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//
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#include <uhdlib/utils/interpolation.hpp>
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#include <boost/test/unit_test.hpp>
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#include <string>
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BOOST_AUTO_TEST_CASE(test_get_bounding_iterators)
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{
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using std::string;
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using namespace uhd::math;
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const std::map<double, string> data{{1.0, "leviathan wakes"}, {2.0, "calibans war"}};
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const auto test1 = get_bounding_iterators(data, 1.1);
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BOOST_CHECK_EQUAL(test1.first->first, 1.0);
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BOOST_CHECK_EQUAL(test1.second->first, 2.0);
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BOOST_CHECK_EQUAL(test1.first->second, "leviathan wakes");
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BOOST_CHECK_EQUAL(test1.second->second, "calibans war");
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const auto test2 = get_bounding_iterators(data, 0.5);
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BOOST_CHECK_EQUAL(test2.first->first, 1.0);
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BOOST_CHECK_EQUAL(test2.second->first, 1.0);
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BOOST_CHECK_EQUAL(test2.first->second, "leviathan wakes");
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BOOST_CHECK_EQUAL(test2.second->second, "leviathan wakes");
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const auto test3 = get_bounding_iterators(data, 1e6);
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BOOST_CHECK_EQUAL(test3.first->first, 2.0);
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BOOST_CHECK_EQUAL(test3.second->first, 2.0);
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BOOST_CHECK_EQUAL(test3.first->second, "calibans war");
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BOOST_CHECK_EQUAL(test3.second->second, "calibans war");
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const auto test4 = get_bounding_iterators(data, 2.0);
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BOOST_CHECK_EQUAL(test4.first->first, 1.0);
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BOOST_CHECK_EQUAL(test4.second->first, 2.0);
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BOOST_CHECK_EQUAL(test4.first->second, "leviathan wakes");
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BOOST_CHECK_EQUAL(test4.second->second, "calibans war");
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const auto test5 = get_bounding_iterators(data, 1.0);
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BOOST_CHECK_EQUAL(test5.first->first, 1.0);
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BOOST_CHECK_EQUAL(test5.second->first, 1.0);
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BOOST_CHECK_EQUAL(test5.first->second, "leviathan wakes");
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BOOST_CHECK_EQUAL(test5.second->second, "leviathan wakes");
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}
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BOOST_AUTO_TEST_CASE(test_interp)
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{
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const double x0 = 1.0, x1 = 2.0;
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const double y0 = 2.0, y1 = 4.0;
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const double x = 1.5;
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const double y_exp = 3.0;
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BOOST_CHECK_EQUAL(uhd::math::linear_interp<double>(x, x0, y0, x1, y1), y_exp);
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}
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BOOST_AUTO_TEST_CASE(test_map_interp)
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{
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using namespace uhd::math;
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const std::map<double, double> test_data{{1.0, 1.0}, {2.0, 2.0}, {3.0, 3.0}};
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BOOST_CHECK_EQUAL(at_nearest(test_data, 1.1), 1.0);
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BOOST_CHECK_EQUAL(at_nearest(test_data, 1.9), 2.0);
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BOOST_CHECK_EQUAL(at_nearest(test_data, 2.1), 2.0);
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BOOST_CHECK_EQUAL(at_nearest(test_data, 1e9), 3.0);
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BOOST_CHECK_CLOSE(at_lin_interp(test_data, 1.5), 1.5, 1e-6);
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BOOST_CHECK_EQUAL(at_lin_interp(test_data, 0.1), 1.0);
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BOOST_CHECK_EQUAL(at_lin_interp(test_data, 2.0), 2.0);
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BOOST_CHECK_EQUAL(at_lin_interp(test_data, 137.0), 3.0);
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}
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BOOST_AUTO_TEST_CASE(test_map_bilinear_interp)
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{
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using namespace uhd::math;
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// clang-format off
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std::map<double, std::map<double, double>> test_data{
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{1.0, {{1.0, 0.0}, {2.0, 1.0}}},
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{2.0, {{1.0, 1.0}, {2.0, 2.0}}}
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};
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// clang-format on
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BOOST_CHECK_CLOSE(at_bilin_interp(test_data, 1.5, 1.5), 1.0, 1e-6);
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// Move y out of bounds, keep x in bounds
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BOOST_CHECK_CLOSE(at_bilin_interp(test_data, 1.5, -17), 0.5, 1e-6);
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BOOST_CHECK_CLOSE(at_bilin_interp(test_data, 1.5, 123.4), 1.5, 1e-6);
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// Move x out of bounds, keep y in bounds
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BOOST_CHECK_CLOSE(at_bilin_interp(test_data, -1e5, 1.5), 0.5, 1e-6);
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BOOST_CHECK_CLOSE(at_bilin_interp(test_data, 1e9, 1.5), 1.5, 1e-6);
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// Move x and y out of bounds
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BOOST_CHECK_CLOSE(at_bilin_interp(test_data, -1e5, -1e6), 0.0, 1e-6);
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BOOST_CHECK_CLOSE(at_bilin_interp(test_data, -1e5, 1e6), 1.0, 1e-6);
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BOOST_CHECK_CLOSE(at_bilin_interp(test_data, 1e5, -1e6), 1.0, 1e-6);
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BOOST_CHECK_CLOSE(at_bilin_interp(test_data, 1e5, 1e6), 2.0, 1e-6);
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// Boundary conditions
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BOOST_CHECK_EQUAL(at_bilin_interp(test_data, 1.0, 1.0), 0.0);
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BOOST_CHECK_EQUAL(at_bilin_interp(test_data, 2.0, 2.0), 2.0);
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BOOST_CHECK_EQUAL(at_bilin_interp(test_data, 1.0, 1.5), 0.5);
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BOOST_CHECK_EQUAL(at_bilin_interp(test_data, 1.5, 2.0), 1.5);
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}
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