Javascript assertion test function.

js-assert

//  Add 'alert' style fallback for console.log commands (IE8)
var alertFallback = true;
if (typeof console === "undefined" || typeof console.log === "undefined") {
  console = {};
  if (alertFallback) {
    console.log = function(msg) {
      alert(msg);
    };
  }
  else
    console.log = function() {};
}

function assert (value, desc) {
  result = value ? 'pass' : 'fail';
  if (!value)
    result = 'fail';
  console.log(result + ': ' + desc);
}