tests.js

function getRandom(items) {
  return items[Math.floor(Math.random() * items.length)];
}

function assertEqual(a, b) {
    if (JSON.stringify(a) !== JSON.stringify(b)) {
        console.error(`${JSON.stringify(a)} does not equal ${JSON.stringify(b)}`);
    }
}

function getUniqueRandoms(items, count) {
  return [...new Set(getRandoms(items, count))];
}

function getRandoms(items, count) {
    const result = new Array(count);

    for (let i = 0; i < count; i++) {
        result[i] = getRandom(items);
    }

    return result;
}

function getRandomStrings(items, length, count) {
  return Array.from(new Array(count)).map(() => randomString(items, length));
}

function randomString(items, count) {
  return Array.from(new Array(count)).map(() => getRandom(items)).join('');
}

function getRandomsArray(items, length) {
  return getRandoms(items, length).join('');
}

function randomInts(length, min, max) {
  return Array.from(new Array(length)).map(() => randomInt(min, max));
}

function randomInt(min, max) {
  return Math.floor(Math.random() * (max - min + 1) + min);
}

function getCommandTestCase() {
  const commands = ["LRUCache"]
  const data = [[randomInt(1, 10 ** 2)]];

  for (let i  = 0 ; i < randomInt(0, 10 ** 3); i++) {
    if (getRandom([true, false])) {
      commands.push("put");
      data.push([randomInt(0, 10), randomInt(0, 10)])
    } else {
      commands.push("get");
      data.push([randomInt(0, 10)])
    }
  }

  return [commands, data].map(JSON.stringify).join('\n')
}

function getTestCase() {
  const matrix = [];
  const letters = "abc";
  const length = 3;
  
  for (let i = 0 ; i < length; i++) {
    matrix.push(getRandoms(letters, length));
  }

  const array = [...new Set(getRandomStrings(letters, 4, 10 ** 2))];
  return JSON.stringify(matrix) + '\n' + JSON.stringify(array);
}

function getTestCases() {
  return Array.from(new Array(10 ** 3)).map(getTestCase).join('\n')
}

getTestCases()