AddParamsToUrl | NodeJS

addParamsToUrl.js

const { URL } = require('url');

/**
 * This function adds params to url
 *
 * @param {stirng} url - Url
 * @param  {...any} params - Params. E.g. url, param1, param1value, param2, param2value
 */
const addParamsToUrl = (url = '', ...params) => {
  const myUrl = new URL(url);

  for (let i = 0; i < params.length; i += 2) {
    const param = params[i];
    const value = params[i + 1];

    myUrl.searchParams.append(param, value);
  }

  return myUrl.toString();
};

module.exports = addParamsToUrl;

addParamsToUrl.test.js

const addParamsToUrl = require('./addParamsToUrl');

describe('addParamsToUrl', () => {
  it('should be a function', () => {
    expect(typeof addParamsToUrl).toBe('function');
  });

  it('should returns a correct url', () => {
    const url = 'https://google.com';
    const expectUrl = 'https://google.com/?q=hi';

    expect(addParamsToUrl(url, 'q', 'hi')).toBe(expectUrl);
  });

  it('should returns a correct url', () => {
    const url = 'https://google.com/?q=hi';
    const expectUrl = 'https://google.com/?q=hi&locale=en-US&year=2021';

    expect(addParamsToUrl(url, 'locale', 'en-US', 'year', 2021)).toBe(
      expectUrl
    );
  });
});