Test results

The code...

    
   <script type="text/javascript">
   
        assert( true, "Test suite is up and running" );
   
        /* test 1: does function exist? */
        assert( typeof someFunction != "undefined", "Function 'someFunction' is valid" );
   
        /* test 2: does function return a string? */
        function helloWorld() { return 'hello world'; }  
   
        assert( helloWorld() == "hello world", "Function 'helloWorld' returns correct string" );
        
        /* test 3: does ninja.attack return a object? */
        var ninja = {
                        attack:function(steps) {
                        
                            // return object
                            var result = { 'type': 'katana', 'points': 0 };
                           
                            // any step?
                            if (steps != undefined) {
                                
                                // calculate damage
                                var dmg = Math.floor( Math.random() * 10 * steps );
                                
                                // save and return
                               result.points = dmg;
                               return result;
                                
                            } else {
                            
                                // no step taken    
                                result.points = 1;
                                return result;
                            
                            }
                            
                        }
        };
        
        assert( typeof ninja.attack() == 'object', 'ninja.attack returns an object' );
        
        /* test 4: does ninja.attack(2).points return a number? */
        var pattern1 = new RegExp("[^0-9]"); // match all except numbers
        assert( pattern1.test( ninja.attack(2).points ) == false, "ninja.attack(2).points returns a number (regexp match)" );
        
        /* test 5; does ninja.attack(3).type return a string? */
        assert( typeof ninja.attack(3).type == "string", "ninja.attack(3).type returns a string (typeof)" );
        
        /* test 6: does ninja.attack(2).points return a number? */
        assert( typeof ninja.attack(2).points == "number", "ninja.attack(2).points returns a number (typeof)" );
        
   </script>
   

The assert-function

    TEST_RESULT_ID_LIST = "results";
    TEST_PASS_LI_CLASS = "passed";
    TEST_FAIL_LI_CLASS = "failed";
    
    /**
     * Run a test and output the result in a LI-tag
     * specified by TEST_RESULT_ID_LIST
     *
     * @param bool value (testresult)
     * @param string desc (description of test)
    */
    function assert( value, desc ) {
        var li = document.createElement("li");
        li.className = value ? TEST_PASS_LI_CLASS : TEST_FAIL_LI_CLASS;
        li.appendChild( document.createTextNode( desc ) );
        document.getElementById( TEST_RESULT_ID_LIST ).appendChild( li );
    }