Kissunit is a project mainly written in JavaScript, it's free.
REALLY simple Javascript testing
Finally, a javascript testing framework I can get my head around. It's presently less than 100 lines, so just read source.
Here's hello world:
<html>
<head>
<script src="kiss.js"></script>
<script>
var tests = new KISSUnit({
setUp: function() {
tests.foo = "bar";
},
testFoo: function(){
assertTrue(true);
assertEqual("bar", tests.foo);
}
});
window.onload = function() { tests.run(); }
</script>
</head>
<body>
</body>
</html>