AngularJS currency filter tests

HTML

<script src="//cdnjs.cloudflare.com/ajax/libs/angular-i18n/1.2.15/angular-locale_de-de.js"></script>
<div ng-app="editor">
    <div ng-controller="Controller">
        <ul ng-repeat="number in numbers">
            <li><span ng-bind="number"></span> = <span ng-bind="number|wlCurrency"></span></li>
         </ul>
    </div>
</div>

JavaScript

var module = angular.module('editor', []);

function Controller($scope) {
    $scope.numbers = [400, 400.23, 400.85, '400,23', '400,95'];
}

module.config(function($provide) {
			$provide.decorator('$locale', function($delegate) {

				$delegate.NUMBER_FORMATS.CURRENCY_SYM = 'EUR';

				return $delegate;
			});
		});

module.filter('wlCurrency',
              [ '$filter', '$locale',
               function(filter, locale) {
                   var currencyFilter = filter('currency : '$' :'0' ');
                   var numberFilter = filter('number');
                   var formats = locale.NUMBER_FORMATS;
                   
                   return function(amount, currencySymbol) {
                       
                       return numberFilter(amount, 0) + ' ' + formats.CURRENCY_SYM;
                           
                       var value = currencyFilter(amount, currencySymbol);
                       var sep = value.indexOf(formats.DECIMAL_SEP);
                       if(amount >= 0) {
                           return value.substring(0, sep);
                       }
                       return value.substring(0, sep) + ')';
                   };
               } ]);