Tool for simulation of http requests

requestSimulator.js

const randomInteger = (min, max) =>
  Math.floor(Math.random() * (max - min + 1)) + min;

const randomBoolean = () => Math.random() >= 0.5;

const defaultTime = () => randomInteger(1000, 3000);

/**
 * Tool for simulating http requests
 *
 * @class RequestSimulator
 */
export default class RequestSimulator {
  /**
   * Request with successful response
   *
   * @method success
   * @param {*} data
   * @param {Number} time
   * @returns {Promise}
   */
  static success(data = 'success', time = defaultTime()) {
    return new Promise((resolve) => {
      setTimeout(() => resolve(data), time);
    });
  }

  /**
   * Request with rejected response
   *
   * @method error
   * @param {*} data
   * @param {Number} time
   * @returns {Promise}
   */
  static error(data = 'error', time = defaultTime()) {
    return new Promise((resolve, reject) => {
      setTimeout(() => reject(new Error(data)), time);
    });
  }

  /**
   * Request with random response
   *
   * @method random
   * @param {*} sData
   * @param {*} eData
   * @param {Number} time
   * @returns {Promise}
   */
  static random(sData = 'success', eData = 'error', time = defaultTime()) {
    return new Promise((resolve, reject) => {
      setTimeout(() => {
        if (randomBoolean()) return resolve(sData);
        return reject(new Error(eData));
      }, time);
    });
  }
}

RequestSimulator.success();