testing library

by joplomacedo

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.15/lodash.min.js"></script>

JavaScript

function getPrecisionFromNum(num) {
    const decimalPart = ("" + num).split(".")[1];
    return decimalPart ? decimalPart.length : 0;
}


function forceOptionsToValidOptions({
  max,
  min,
  precision,
  step,
  justControls
}) {
  let internalOptions = {};

  if (min >= max) {
    console.warn('max cannot be equal or lower than min. max was converted to Infinity')
    internalOptions.max = Infinity;
  } else {
    internalOptions.max = max;
  }

  // precision/max-min-step inconsistency
  const precisionFromMax = getPrecisionFromNum(max);
  const precisionFromMin = getPrecisionFromNum(min);
  const precisionFromStep = getPrecisionFromNum(step);
  const highestOfOptionsPrecision = Math.max(precisionFromMax, precisionFromMin);

  if (highestOfOptionsPrecision > precision) {
    console.warn('max, min or step have precision higher than defined precision. original precision value is  ignoredd. new precision value is equal to the highest of these');
    internalOptions.precision = highestOfOptionsPrecision;
  } else {
    internalOptions.precision = precision;
  }

  internalOptions = {
    ...internalOptions,
    //keep em as they are
    min,
    step,
    justControls
  };

  return internalOptions;
}


function multiplyText(text, times) {
  let result = '';
  for (let i = 0; i < times; i++) {
    result += text;
  }
  return result;
}

function test(name, fn, tests) {
  let title = `Testing: ${name}`;
  let delimiter = multiplyText('#', title.length);

  console.log(delimiter);
  console.log('Test: ' + name);

  tests.forEach((test, i) => {
    const {
      args,
      expected
    } = test;
    const result = fn(...args);
    const passed = _.isEqual(expected, result);


    if (passed) {
      console.log('passed: ', passed)
    } else {
      console.log(delimiter);
      console.log('arguments: ', ...args);
      console.log('result: ', result);
      console.log('expected: ', expected);
      console.error('passed: ', passed)
     ...