test_double_value.cpp

/*
MIT License

Copyright (c) 2019-2025 wsjcpp

Permission is hereby granted, free of charge, to any person obtaining a copy
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The above copyright notice and this permission notice shall be included in all
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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SOFTWARE.

Official Source Code: https://github.com/wsjcpp/wsjcpp-yaml
*/

#include <vector>
#include <iostream>
#include <cmath>
#include <fstream>
#include <cfloat>
#include <wsjcpp_yaml.h>
#include "helpers.h"

int main() {
    std::string sFilepath = find_test_data_file("data/float-double/example.yml");

    WsjcppYaml yaml;
    std::string sError;
    if (!yaml.loadFromFile(sFilepath, sError)) {
        std::cerr << "Error parsing: " << sError << std::endl;
        return -1;
    }

    int ret = 0;
    if (!yaml.getRoot()->hasElement("double")) {
        std::cerr << "Parameter 'float' not found" << std::endl;
        ret = -1;
    }

    if (!yaml.getRoot()->hasElement("double")) {
        std::cerr << "Parameter 'double' has not value" << std::endl;
        ret = -1;
    }

    std::string expected_val_str = "1.0002";
    if (yaml.getRoot()->getElement("double")->getValue() != expected_val_str) {
        std::cerr << "Parameter 'double' has value string '" << yaml.getRoot()->getElement("double")->getValue() << "', but expected '" << expected_val_str << "'" << std::endl;
        ret = -1;
    }

    double val_double = yaml["double"].valDouble();
    double expected_double = 1.0002f;
    // std::numeric_limits<double>::epsilon() => 2.22045e-16
    // std::numeric_limits<float>::epsilon() => 1.19209e-07
    // abs(val_double - expected_double) => 3.31879e-08
    if (abs(val_double - expected_double) > FLT_EPSILON) {
        std::cerr << "Parameter 'double' has value number '" << val_double << "', but expected '" << expected_double << "'" << std::endl;
        ret = -1;
    }

    yaml["double"].val(1.0003f);

    expected_val_str = "1.0003";
    if (yaml.getRoot()->getElement("double")->getValue() != expected_val_str) {
        std::cerr << "Parameter 'double' has value string '" << yaml.getRoot()->getElement("double")->getValue() << "', but expected '" << expected_val_str << "'" << std::endl;
        ret = -1;
    }

    expected_double = 1.0003f;
    val_double = yaml["double"].valDouble();
    if (abs(val_double - expected_double) > FLT_EPSILON) {
        std::cerr << "Parameter 'double' has value number '" << val_double << "', but expected '" << expected_double << "'" << std::endl;
        ret = -1;
    }
    float val_double_like_float = yaml["double"].valFloat();
    float expected_float = 1.0003f;
    if (abs(val_double_like_float - expected_float) > FLT_EPSILON) {
        std::cerr << "Parameter 'double' has value number (like float) '" << val_double_like_float << "', but expected '" << expected_float << "'" << std::endl;
        ret = -1;
    }

    // compareD("has double value is 1.0003 (double 2)", yaml["double"].valDouble(), 1.0003f);

    return ret;
}