Utils.js

module.exports.generateRandomTextValue = function(length) {
    let chars = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
    let result = '';
    for (let i = length; i > 0; --i) {
        result += chars[Math.floor(Math.random() * chars.length)];
    }
    return result;
};

module.exports.generateRandomHexValue = function(length) {
    let chars = '0123456789abcdef';
    let result = '';
    for (let i = length; i > 0; --i) {
        result += chars[Math.floor(Math.random() * chars.length)];
    }
    return result;
};

module.exports.generateRandomNumber = function(length) {
    let numbers = '0123456789';
    let result = '';
    for (let i = length; i > 0; --i) {
        result += numbers[Math.floor(Math.random() * numbers.length)];
    }
    return parseInt(result);
};