test_pressure.cpp

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#include <gmock/gmock.h>
#include <gtest/gtest.h>
 
#include <iostream>
#include <vector>
 
#include "../includes/pressure_utl.h"
 
#define KPA_MMH2O 101.97162129779
#define RATIO_VOLTAGE_DIVIDER 0.8192
#define V_SUPPLY 5.08
 
int16_t convertSensor2PressureFloat(uint16_t sensorValue) {
    static float filteredVout = 0;
    double rawVout = sensorValue * 3.3 / 1024.0;
    filteredVout = filteredVout + (rawVout - filteredVout) * 0.2;
 
    // Voltage divider ratio
    double vOut = filteredVout / RATIO_VOLTAGE_DIVIDER;
 
    // Pressure converted to kPA
    double pressure = ((vOut / V_SUPPLY) - 0.04) / 0.09;
 
    if (pressure <= 0.0) {
        pressure = 0;
    }
 
    return pressure * KPA_MMH2O;
}
 
class PressionTest : public ::testing::Test {
 protected:
    PressionTest() {}
 
    virtual void SetUp() { resetFilteredRawPressure(); }
 
    std::vector<uint16_t> input = {0, 100, 1000, 5000, 8000, 16000, 24000, 65535};
};
 
#define NEAR_EQUAL_DIFF 2
TEST_F(PressionTest, testConvertSensor2PressureCompWithFloat) {
    std::vector<uint16_t> outputTruth;
    std::vector<uint16_t> output;
 
    for (size_t i = 0; i < input.size(); i++) {
        outputTruth.push_back(convertSensor2PressureFloat(input[i]));
        output.push_back(convertSensor2Pressure(input[i]));
 
        std::cout << outputTruth.back() << " " << output.back() << std::endl;
    }
 
    for (int i = 0; i < output.size(); i++) {
        ASSERT_LE(std::abs(outputTruth[i] - output[i]), 2);
    }
}
 
TEST_F(PressionTest, testConvertSensor2Pressure) {
    std::vector<uint16_t> outputTruth = {0, 0, 144, 984, 2182, 4545, 7839, 17762};
    std::vector<uint16_t> output;
 
    for (size_t i = 0; i < input.size(); i++) {
        output.push_back(convertSensor2Pressure(input[i]));
 
        std::cout << output.back() << std::endl;
    }
 
    ASSERT_THAT(output, testing::ElementsAreArray(outputTruth));
}