sensor-one-shot-simulator.js

var tags = require("common-tags"); // npm install common-tags
var Proximity = {
  read: function(which) {
    var distance = [Math.round(Math.random() * 20)];
    return Promise.resolve(
      Object.assign({}, which, { distance })
    );
  }
};

Promise.all([
  Proximity.read({ position: "bottom-left", direction: "rear" }),
  Proximity.read({ position: "top-middle", direction: "front" }),
]).then(proximities => {
  proximities.forEach(prox => {
    console.log(
      tags.stripIndent`
        Position: ${prox.position}
        Direction: ${prox.direction}
        Distance: ${prox.distance}cm
        ----------------------------
      `
    );
  })
});