public function testConvertKana_HiraganaToKana()
{
$data = 'あいうえお';
$form = $this->getMockBuilder('Symfony\\Component\\Form\\Test\\FormInterface')->getMock();
$event = new FormEvent($form, $data);
$filter = new ConvertKanaListener('CV');
$filter->onPreSubmit($event);
$this->assertEquals('アイウエオ', $event->getData());
}