write test for cleanUpTag

test/utils.js

@@ -1,8 +1,8 @@
 'use strict';
 /*global require*/
 
-var assert = require('assert'),
-	utils = require('./../public/src/utils.js');
+var assert = require('assert');
+var utils = require('./../public/src/utils.js');
 
 
 describe('Utility Methods', function () {
@@ -35,4 +35,21 @@ describe('Utility Methods', function (){
 			assert.notEqual(uuid1, uuid2, 'matches');
 		});
 	});
+
+	describe('cleanUpTag', function () {
+		it('should cleanUp a tag', function (done) {
+			var cleanedTag = utils.cleanUpTag(',\/#!$%\^\*;TaG1:{}=_`<>\'"~()?\|');
+			assert.equal(cleanedTag, 'tag1');
+			done();
+		});
+
+		it('should return empty string for invalid tags', function (done) {
+			assert.strictEqual(utils.cleanUpTag(undefined), '');
+			assert.strictEqual(utils.cleanUpTag(null), '');
+			assert.strictEqual(utils.cleanUpTag(false), '');
+			assert.strictEqual(utils.cleanUpTag(1), '');
+			assert.strictEqual(utils.cleanUpTag(0), '');
+			done();
+		});
+	});
 });