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//
// Copyright 2020 Ettus Research, a National Instruments Brand
//
// SPDX-License-Identifier: GPL-3.0-or-later
//
#include <uhdlib/utils/interpolation.hpp>
#include <boost/test/unit_test.hpp>
BOOST_AUTO_TEST_CASE(test_interp)
{
const double x0 = 1.0, x1 = 2.0;
const double y0 = 2.0, y1 = 4.0;
const double x = 1.5;
const double y_exp = 3.0;
BOOST_CHECK_EQUAL(uhd::math::linear_interp<double>(x, x0, y0, x1, y1), y_exp);
}
BOOST_AUTO_TEST_CASE(test_map_interp)
{
using namespace uhd::math;
std::map<double, double> test_data{{1.0, 1.0}, {2.0, 2.0}, {3.0, 3.0}};
BOOST_CHECK_EQUAL(at_nearest(test_data, 1.1), 1.0);
BOOST_CHECK_EQUAL(at_nearest(test_data, 1.9), 2.0);
BOOST_CHECK_EQUAL(at_nearest(test_data, 2.1), 2.0);
BOOST_CHECK_EQUAL(at_nearest(test_data, 1e9), 3.0);
BOOST_CHECK_CLOSE(at_lin_interp(test_data, 1.5), 1.5, 1e-6);
BOOST_CHECK_EQUAL(at_lin_interp(test_data, 0.1), 1.0);
BOOST_CHECK_EQUAL(at_lin_interp(test_data, 2.0), 2.0);
BOOST_CHECK_EQUAL(at_lin_interp(test_data, 137.0), 3.0);
}
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