ChimeraTests.cpp

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//
//  This file is part of VirtualFluids. VirtualFluids 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.
//
//  VirtualFluids 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.
//
//  SPDX-License-Identifier: GPL-3.0-or-later
//  SPDX-FileCopyrightText: Copyright © VirtualFluids Project contributors, see AUTHORS.md in root folder
//
//=======================================================================================
#include <gmock/gmock.h>
 
#include <lbm/ChimeraTransformation.h>
 
#ifdef VF_DOUBLE_ACCURACY
#define REAL_EQ(a) testing::DoubleEq(a)
#else
#define REAL_EQ(a) testing::FloatEq(a)
#endif
 
/*
* InverseChimeraWithK
*/
TEST(ChimeraTest, forwardChimeraWithInverseK)
{
    real mfa = 1;
    real mfb = 1;
    real mfc = 1;
 
    const real vv = 1.;
    const real v2 = 1.;
 
    const real K = 1.;
    const real inverseK = 1 / K;
 
    vf::lbm::forwardChimeraWithInverseK(mfa, mfb, mfc, vv, v2, K, inverseK);
 
    EXPECT_THAT(mfa, REAL_EQ(3.));  // mfa + mfb + mfc
    EXPECT_THAT(mfb, REAL_EQ(-4.)); // -(mfa + mfb + mfc + 1)
    EXPECT_THAT(mfc, REAL_EQ(6.));  // (mfa + mfc) + (mfa + mfb + mfc + 1)
}
 
 
TEST(ChimeraTest, backwardChimeraWithInverseK)
{
    // starting with the result values from the test above.
    real mfa = 3.;
    real mfb = -4.;
    real mfc = 6.;
 
    const real vv = 1.;
    const real v2 = 1.;
 
    const real K = 1.;
    const real inverseK = 1 / K;
 
    vf::lbm::backwardChimeraWithInverseK(mfa, mfb, mfc, vv, v2, K, inverseK);
 
    // resulting in the start values from the test above.
    EXPECT_THAT(mfa, REAL_EQ(1.));
    EXPECT_THAT(mfb, REAL_EQ(1.));
    EXPECT_THAT(mfc, REAL_EQ(1.));
}
 
/*
* Chimera
*/
TEST(ChimeraTest, forwardChimera)
{
    real mfa = 1;
    real mfb = 1;
    real mfc = 1;
 
    const real vv = 1.;
    const real v2 = 1.;
 
    vf::lbm::forwardChimera(mfa, mfb, mfc, vv, v2);
 
    EXPECT_THAT(mfa, REAL_EQ(3.));  // mfa + mfb + mfc
    EXPECT_THAT(mfb, REAL_EQ(-3.)); // -(mfa + mfb + mfc)
    EXPECT_THAT(mfc, REAL_EQ(5.));  // (mfa + mfc) + (mfa + mfb + mfc)
}
 
 
TEST(ChimeraTest, backwardChimera)
{
    // starting with the result values from the test above.
    real mfa = 3.;
    real mfb = -3.;
    real mfc = 5.;
 
    const real vv = 1.;
    const real v2 = 1.;
 
    vf::lbm::backwardChimera(mfa, mfb, mfc, vv, v2);
 
    // resulting in the start values from the test above.
    EXPECT_THAT(mfa, REAL_EQ(1.));
    EXPECT_THAT(mfb, REAL_EQ(1.));
    EXPECT_THAT(mfc, REAL_EQ(1.));
}
 
/*
* ChimeraWithK
*/
TEST(ChimeraTest, forwardChimeraWithK)
{
    real mfa = 1;
    real mfb = 1;
    real mfc = 1;
 
    const real vv = 1.;
    const real v2 = 1.;
 
    const real K = 1.;
 
    vf::lbm::forwardChimeraWithK(mfa, mfb, mfc, vv, v2, K);
 
    EXPECT_THAT(mfa, REAL_EQ(3.));  // mfa + mfb + mfc
    EXPECT_THAT(mfb, REAL_EQ(-4.)); // -(mfa + mfb + mfc)
    EXPECT_THAT(mfc, REAL_EQ(6.));  // (mfa + mfc) + (mfa + mfb + mfc)
}
 
 
TEST(ChimeraTest, backwardChimeraWithK)
{
    // starting with the result values from the test above.
    real mfa = 3.;
    real mfb = -4.;
    real mfc = 6.;
 
    const real vv = 1.;
    const real v2 = 1.;
 
    const real K = 1.;
 
    vf::lbm::backwardChimeraWithK(mfa, mfb, mfc, vv, v2, K);
 
    // resulting in the start values from the test above.
    EXPECT_THAT(mfa, REAL_EQ(1.));
    EXPECT_THAT(mfb, REAL_EQ(1.));
    EXPECT_THAT(mfc, REAL_EQ(1.));
}