(function(root, factory){
    'use strict';

    var define = root.define;

    // CommonJS
    if (typeof exports === 'object'){
        module.exports = factory();

        // AMD
    } else if (typeof define === 'function' && define.amd){
        define(factory);
        // Browser
    } else {
        root.TestHelper = factory();
    }
}( ( typeof window === 'object' && window ) || this, function(){

    'use strict';

    var TestHelper = {},
        assert = require('referee').assert;

    // helps us make sure that the order of the tests have no impact on their succes
    function getUniqueString(){
        if ( getUniqueString.uid === undefined ){
            getUniqueString.uid = 0;
        }
        getUniqueString.uid++;

        return 'my unique String number ' + getUniqueString.uid.toString();
    }

    // makes sure that all tokens in the passed array are different
    function assertAllTokensDifferent( tokens ){
        var length = tokens.length,
            j, k;
        assert( tokens.length > 0 );
        // compare all tokens
        for ( j = 0; j < length; j++ ){
            for ( k = j + 1; k < length; k++ ){
                assert( tokens[j] !== tokens[k] );
            }
        }

        // make sure we actually tested something
        assert.equals( j, length );
        assert.equals( k, length );
    }

    TestHelper.getUniqueString = getUniqueString;
    TestHelper.assertAllTokensDifferent = assertAllTokensDifferent;

    return TestHelper;
}));