The Tor Browser / file revision

 /* Any copyright is dedicated to the Public Domain.

  * http://creativecommons.org/publicdomain/zero/1.0/ */

 function log(text) {

   dump("WORKER " + text + "\n");

 }

 function send(message) {

   self.postMessage(message);

 }

 function finish() {

   send({kind: "finish"});

 }

 function ok(condition, description) {

   send({kind: "ok", condition: !!condition, description: "" + description});

 }

 function is(a, b, description) {

   let outcome = a == b; // Need to decide outcome here, as not everything can be serialized

   send({kind: "is", outcome: outcome, description: "" + description, a: "" + a, b: "" + b});

 }

 function isnot(a, b, description) {

   let outcome = a != b; // Need to decide outcome here, as not everything can be serialized

   send({kind: "isnot", outcome: outcome, description: "" + description, a: "" + a, b: "" + b});

 }

 function info(description) {

   send({kind: "info", description: "" + description});

 }