random.re

open Belt;

let randomlyFailedPromise = () => {
  let random = Js.Math.random();
  Js.Promise.make((~resolve, ~reject as _) =>
    resolve(.
      if (random > 0.5) {
        Result.Error(`NumberToHigh);
      } else {
        Result.Ok(random);
      },
    )
  );
};

let addTwo = a => a +. 2.;

let checkIfNumberIsBiggerThanTwoPointSeven = a =>
  if (a > 2.7) {
    Result.Ok(a);
  } else {
    Result.Error(`NumberToLow);
  };

let logNumber = a => Js.log(a);

let multiplyByFour = a => a *. 4.;


/* Try to run a randomlyFailedPromise
   if it succeeds addTwo
   check if the number is bigger than two point seven
   if it is multiply it by four
   and then log your final result given that it's sucessful
   */