Resolving a promise chain (promise.js "all" is broken)

promises

#!/usr/bin/env node

console.log("Promise test");

var p1, p2, p3, p4;
var r1, r2, r3, r4;

p1 = new Promise(res => r1 = res);
p2 = new Promise(res => r2 = res);
p3 = new Promise(res => r3 = res);
p4 = new Promise(res => r4 = res);

function resolveAll(list) {
  var item = list.shift();

  if (list.length) {
    console.log("WAITING");
    return item.then(() => resolveAll(list));
  }

  console.log("LAST WAITING");
  return item;
}

console.log("Start waiting");
resolveAll([p1, p2, p3, p4])
.then(() => console.log("DONE"));

setTimeout(() => r1(true), Math.random() * 1000);
setTimeout(() => r2(true), Math.random() * 2000);
setTimeout(() => r3(true), Math.random() * 3000);
setTimeout(() => r4(true), Math.random() * 4000);