simple async test

asyncTest.js

(function() {
  var queue = [],
    paused = false,
    results;
  this.test = function(name, fn) {
    queue.push(function() {
      results = document.getElementById("results");

      results = assert(true, name).appendChild(
        document.createElement("ul"));
      fn();
    });
    runTest();
  };
  this.pause = function() {
    paused = true;
  };
  this.resume = function() {
    paused = false;
    setTimeout(runTest, 1);
  };

  function runTest() {
    if (!paused && queue.length) {
      queue.shift()();
      if (!paused) {
        resume();
      }
    }
  }
  this.assert = function assert(value, desc) {
    var li = document.createElement("li");
    li.className = value ? "pass" : "fail";
    li.appendChild(document.createTextNode(desc));
    results.appendChild(li);
    if (!value) {
      li.parentNode.parentNode.className = "fail";
    }
    return li;
  };
})();
window.onload = function() {
  test("Async Test #1", function() {
    pause();
    setTimeout(function() {
      assert(true, "First test completed");
      resume();
    }, 1000);
  });
  test("Async Test #2", function() {
    pause();
    setTimeout(function() {
      assert(true, "Second test completed");
      resume();
    }, 1000);
  });
};