File: TestMovAvg.cpp

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// Copyright (c) Signal Estimator authors
// Licensed under MIT

#include "processing/MovAvg.hpp"

#include <gtest/gtest.h>

using namespace signal_estimator;

namespace {

// Moving average calculation test.
TEST(MovAvgTest, MovingAverage) {
    MovAvg<double> mov_avg(4);
    mov_avg.add(10.0);
    mov_avg.add(20.0);
    mov_avg.add(30.0);
    mov_avg.add(40.0);
    EXPECT_DOUBLE_EQ(mov_avg.get(), 25.0);

    mov_avg.add(50.0);
    EXPECT_DOUBLE_EQ(mov_avg.get(), 35.0);
}

// The test initializes an object of the MovAvg class and checks that the object
// is not full.
TEST(MovAvgTest, Initialization) {
    MovAvg<double> mov_avg(5);
    EXPECT_FALSE(mov_avg.is_full());
}

// Test for adding values and checking is_full().
TEST(MovAvgTest, AddAndIsFull) {

    MovAvg<double> mov_avg(3);
    mov_avg.add(10.0);
    mov_avg.add(20.0);
    EXPECT_FALSE(mov_avg.is_full()); // The object IS NOT full after 2 additions.
    mov_avg.add(30.0);
    EXPECT_TRUE(mov_avg.is_full()); // The object IS full after 3 additions.
}

// Test for initialization of a MovAvg object with a window size equal to 0. The
// application is expected to exit with a return value 1.
TEST(MovAvgTest, InitializationWithZeroWindow) {
    MovAvg<double> mov_avg(0);
    EXPECT_EXIT({ exit(1); }, ::testing::ExitedWithCode(1), ".*");
}

} // namespace