    public function testParseTags () {
        $tags = 'test,test2,test3,#test4';
        $this->assertEquals (Tags::parseTags ($tags), array (
            '#test',
            '#test2',
            '#test3',
            '#test4',
        ));
    }
The software does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.