gecko-dev/dom/workers/test/dom_worker_helper.js

/**
 * Any copyright is dedicated to the Public Domain.
 * http://creativecommons.org/publicdomain/zero/1.0/
 */

var gRemainingTests = 0;

function waitForWorkerFinish() {
  if (gRemainingTests == 0) {
    SimpleTest.waitForExplicitFinish();
  }
  ++gRemainingTests;
}

function finish() {
  --gRemainingTests;
  if (gRemainingTests == 0) {
    SimpleTest.finish();
  }
}