javascript custom test suite

testsuite

<script type="text/javascript">
  
  (function foo() {
    this.buzz = function buzz() {
      return 'buzz';
    }
    console.log('I am a self invoking function');
  })();

  (function() {
    var results;
    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;
    };
    this.test = function test(name, fn) {
      results = document.getElementById("results");
      results = assert(true, name).appendChild(document.createElement('ul'));
      fn();
    };
  })(); //iffy self executing function

  window.onload = function() {
    test("A test. ", function testA() {
      assert(true, "First assertion completed");
      assert(true, "Second assertion completed");
      assert(true, "Third assertion completed");
    });
    test("Another test.", function testB() {
      assert(true, "first test completed");
      assert(false, "second test failed");
      assert(true, "Third assertion completed");
    });
    test("A third test", function testC() {
      assert(null, "fail");
      assert(5, "pass");
    });
  };
</script>