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/**
* @file
* @brief Unit tests for openshot::Fraction
* @author Jonathan Thomas <jonathan@openshot.org>
*
* @ref License
*/
/* LICENSE
*
* Copyright (c) 2008-2019 OpenShot Studios, LLC
* <http://www.openshotstudios.com/>. This file is part of
* OpenShot Library (libopenshot), an open-source project dedicated to
* delivering high quality video editing and animation solutions to the
* world. For more information visit <http://www.openshot.org/>.
*
* OpenShot Library (libopenshot) is free software: you can redistribute it
* and/or modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* OpenShot Library (libopenshot) 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with OpenShot Library. If not, see <http://www.gnu.org/licenses/>.
*/
#include <catch2/catch.hpp>
#include "Fraction.h"
using namespace std;
using namespace openshot;
TEST_CASE( "Constructors", "[libopenshot][fraction]" )
{
// Create a default fraction (should be 1/1)
Fraction f1;
// Check default fraction
CHECK(f1.num == 1);
CHECK(f1.den == 1);
CHECK(f1.ToFloat() == Approx(1.0f).margin(0.00001));
CHECK(f1.ToDouble() == Approx(1.0f).margin(0.00001));
// reduce fraction
f1.Reduce();
// Check the reduced fraction
CHECK(f1.num == 1);
CHECK(f1.den == 1);
CHECK(f1.ToFloat() == Approx(1.0f).margin(0.00001));
CHECK(f1.ToDouble() == Approx(1.0f).margin(0.00001));
}
TEST_CASE( "Alt_Constructors", "[libopenshot][fraction]" )
{
// Use the delegating constructor for std::pair
std::pair<int, int> args{24, 1};
Fraction f1(args);
CHECK(f1.num == 24);
CHECK(f1.den == 1);
CHECK(f1.ToFloat() == Approx(24.0f).margin(0.00001));
// Use the delegating constructor for std::vector
std::vector<int> v{30000, 1001};
Fraction f2(v);
CHECK(f2.ToFloat() == Approx(30000.0/1001.0).margin(0.00001));
// Use the delegating constructor for std::map<std::string, int>
std::map<std::string, int> dict;
dict.insert({"num", 24000});
dict.insert({"den", 1001});
Fraction f3(dict);
CHECK(f3.den == 1001);
CHECK(f3.num == 24000);
CHECK(f3.Reciprocal().ToFloat() == Approx(1001.0/24000.0).margin(0.00001));
}
TEST_CASE( "WxH_640_480", "[libopenshot][fraction]" )
{
// Create fraction
Fraction f1(640, 480);
// Check fraction
CHECK(f1.num == 640);
CHECK(f1.den == 480);
CHECK(f1.ToFloat() == Approx(1.33333f).margin(0.00001));
CHECK(f1.ToDouble() == Approx(1.33333f).margin(0.00001));
// reduce fraction
f1.Reduce();
// Check the reduced fraction
CHECK(f1.num == 4);
CHECK(f1.den == 3);
CHECK(f1.ToFloat() == Approx(1.33333f).margin(0.00001));
CHECK(f1.ToDouble() == Approx(1.33333f).margin(0.00001));
}
TEST_CASE( "WxH_1280_720", "[libopenshot][fraction]" )
{
// Create fraction
Fraction f1(1280, 720);
// Check fraction
CHECK(f1.num == 1280);
CHECK(f1.den == 720);
CHECK(f1.ToFloat() == Approx(1.77777f).margin(0.00001));
CHECK(f1.ToDouble() == Approx(1.77777f).margin(0.00001));
// reduce fraction
f1.Reduce();
// Check the reduced fraction
CHECK(f1.num == 16);
CHECK(f1.den == 9);
CHECK(f1.ToFloat() == Approx(1.77777f).margin(0.00001));
CHECK(f1.ToDouble() == Approx(1.77777f).margin(0.00001));
}
TEST_CASE( "Reciprocal", "[libopenshot][fraction]" )
{
// Create fraction
Fraction f1(1280, 720);
// Check fraction
CHECK(f1.num == 1280);
CHECK(f1.den == 720);
CHECK(f1.ToFloat() == Approx(1.77777f).margin(0.00001));
CHECK(f1.ToDouble() == Approx(1.77777f).margin(0.00001));
// Get the reciprocal of the fraction (i.e. flip the fraction)
Fraction f2 = f1.Reciprocal();
// Check the reduced fraction
CHECK(f2.num == 720);
CHECK(f2.den == 1280);
CHECK(f2.ToFloat() == Approx(0.5625f).margin(0.00001));
CHECK(f2.ToDouble() == Approx(0.5625f).margin(0.00001));
// Re-Check the original fraction (to be sure it hasn't changed)
CHECK(f1.num == 1280);
CHECK(f1.den == 720);
CHECK(f1.ToFloat() == Approx(1.77777f).margin(0.00001));
CHECK(f1.ToDouble() == Approx(1.77777f).margin(0.00001));
}
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