74 lines
2.1 KiB
C++
74 lines
2.1 KiB
C++
/*
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* Copyright (C) 2026 Emeric Poupon
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*
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* This file is part of LMS.
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*
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* LMS is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* LMS is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with LMS. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <gtest/gtest.h>
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#include "math/NormalizedCosineDistance.hpp"
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namespace lms::math::normalizedCosineDistanceTests
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{
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constexpr float epsilon{ 1e-6F };
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TEST(NormalizedCosineDistance, equalNormalizedVectors)
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{
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Vector<3, float> a{ 1.F, 2.F, 3.F };
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Vector<3, float> b{ 1.F, 2.F, 3.F };
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a.normalizeL2();
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b.normalizeL2();
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EXPECT_NEAR(computeNormalizedCosineDistance(a, b), 0.F, epsilon);
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}
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TEST(NormalizedCosineDistance, orthogonalNormalizedVectors)
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{
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Vector<3, float> a{ 1.F, 0.F, 0.F };
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Vector<3, float> b{ 0.F, 1.F, 0.F };
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a.normalizeL2();
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b.normalizeL2();
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EXPECT_NEAR(computeNormalizedCosineDistance(a, b), 0.5F, epsilon);
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}
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TEST(NormalizedCosineDistance, oppositeNormalizedVectors)
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{
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Vector<3, float> a{ 1.F, 1.F, 0.F };
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Vector<3, float> b{ -1.F, -1.F, 0.F };
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a.normalizeL2();
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b.normalizeL2();
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EXPECT_NEAR(computeNormalizedCosineDistance(a, b), 1.F, epsilon);
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}
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TEST(NormalizedCosineDistance, functor)
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{
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Vector<3, float> reference{ 1.F, 0.F, 0.F };
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Vector<3, float> candidate{ 0.F, 1.F, 0.F };
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reference.normalizeL2();
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candidate.normalizeL2();
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const NormalizedCosineDistance<3, float> distance{ reference };
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EXPECT_NEAR(distance(candidate), 0.5F, epsilon);
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}
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} // namespace lms::math::normalizedCosineDistanceTests
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