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// Copyright (c) Signal Estimator authors
// Licensed under MIT
#include "processing/MovGradient.hpp"
#include <gtest/gtest.h>
using namespace signal_estimator;
namespace {
TEST(MovGradientTest, InitialState) {
MovGradient<double> gradient;
EXPECT_EQ(0.0, gradient.get());
}
TEST(MovGradientTest, SingleValue) {
MovGradient<double> gradient;
gradient.add(5.0);
EXPECT_EQ(0.0, gradient.get());
}
TEST(MovGradientTest, TwoValues) {
MovGradient<double> gradient;
gradient.add(5.0);
gradient.add(10.0);
EXPECT_EQ(0, gradient.get());
}
TEST(MovGradientTest, ThreeValues) {
MovGradient<double> gradient;
gradient.add(5.0);
gradient.add(10.0);
gradient.add(15.0);
EXPECT_EQ(5.0, gradient.get());
}
TEST(MovGradientTest, MoreValues) {
MovGradient<double> gradient;
gradient.add(5.0);
gradient.add(10.0);
gradient.add(15.0);
gradient.add(20.0);
// Calculate the expected gradient manually based on the central difference formula
EXPECT_EQ((20.0 - 10.0) / 2, gradient.get());
}
} // namespace
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