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/*!
* \file
* \brief Deterministic sources test program
* \author Tobias Ringstrom, Tony Ottosson and Adam Piatyszek
*
* -------------------------------------------------------------------------
*
* Copyright (C) 1995-2010 (see AUTHORS file for a list of contributors)
*
* This file is part of IT++ - a C++ library of mathematical, signal
* processing, speech processing, and communications classes and functions.
*
* IT++ is free software: you can redistribute it and/or modify it under the
* terms of the GNU General Public License as published by the Free Software
* Foundation, either version 3 of the License, or (at your option) any
* later version.
*
* IT++ is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License along
* with IT++. If not, see <http://www.gnu.org/licenses/>.
*
* -------------------------------------------------------------------------
*/
#include <itpp/itsignal.h>
#include <itpp/itstat.h>
#include "gtest/gtest.h"
using namespace itpp;
using namespace std;
#define LOOP_SIZE 100000
static
const double tol = 1e-4;
static
double m;
static
double var;
#define REALRUN(name,s) \
for (int i = 0; i < LOOP_SIZE; i++) \
real_result(i) = s(); \
m = mean(real_result), var = variance(real_result);
TEST(Source, All)
{
Sine_Source s10(20.0 / LOOP_SIZE);
Square_Source s11(20.0 / LOOP_SIZE);
Triangle_Source s12(20.0 / LOOP_SIZE);
Sawtooth_Source s13(20.0 / LOOP_SIZE);
Impulse_Source s14(20.0 / LOOP_SIZE);
Pattern_Source s15(vec("1 3"));
RNG_reset(12345);
vec real_result(LOOP_SIZE);
REALRUN("Sine", s10);
ASSERT_NEAR(5.38742e-14, m, tol);
ASSERT_NEAR(0.500005, var, tol);
REALRUN("Square", s11);
ASSERT_NEAR(2e-05, m, tol);
ASSERT_NEAR(1.00001, var, tol);
REALRUN("Triangle", s12);
ASSERT_NEAR(-1.52056e-17, m, tol);
ASSERT_NEAR(0.333337, var, tol);
REALRUN("Sawtooth", s13);
ASSERT_NEAR(0.0002, m, tol);
ASSERT_NEAR(0.333337, var, tol);
REALRUN("Impulse", s14);
ASSERT_NEAR(0.00019, m, tol);
ASSERT_NEAR(0.000189966, var, tol);
REALRUN("Pattern", s15);
ASSERT_NEAR(2, m, tol);
ASSERT_NEAR(1.00001, var, tol);
}
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