// Copyright (c) 2019, Vincent SAMY
// All rights reserved.

// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:

// 1. Redistributions of source code must retain the above copyright notice,
//    this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright notice,
//    this list of conditions and the following disclaimer in the documentation
//    and/or other materials provided with the distribution.

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#define BOOST_TEST_MODULE DigitalFilterTests

#include "difi"
#include "test_functions.h"
#include "warning_macro.h"
#include <boost/test/unit_test.hpp>

DISABLE_CONVERSION_WARNING_BEGIN

template <typename T>
struct System {
    difi::vectX_t<T> data = (difi::vectX_t<T>(4) << 1, 2, 3, 4).finished();
    difi::vectX_t<T> aCoeff = (difi::vectX_t<T>(2) << 1, -0.99993717).finished();
    difi::vectX_t<T> bCoeff = (difi::vectX_t<T>(2) << 0.99996859, -0.99996859).finished();
    difi::vectX_t<T> results = (difi::vectX_t<T>(4) << 0.99996859, 1.999874351973491, 2.999717289867956, 3.999497407630634).finished();
};

DISABLE_CONVERSION_WARNING_END

BOOST_FIXTURE_TEST_CASE(DIGITAL_FILTER_FLOAT, System<float>)
{
    auto df = difi::DigitalFilterf(aCoeff, bCoeff);
    test_coeffs(aCoeff, bCoeff, df, std::numeric_limits<float>::epsilon() * 10);
    test_results(results, data, df, std::numeric_limits<float>::epsilon() * 10);
}

BOOST_FIXTURE_TEST_CASE(DIGITAL_FILTER_DOUBLE, System<double>)
{
    auto df = difi::DigitalFilterd(aCoeff, bCoeff);
    test_coeffs(aCoeff, bCoeff, df, std::numeric_limits<double>::epsilon() * 10);
    test_results(results, data, df, std::numeric_limits<double>::epsilon() * 10);
}