assert input field and value by symfony2 unit test

gistfile1.php

    protected function assertInuptValue($crawler, $key, $val)
    {
        $input = $crawler->filter('input[name="'.$key.'"]');
        $this->assertEquals(
            $val, $input->attr('value'), $key.' failed'
        );
    }

    protected function assertSelectValue($crawler, $key, $val)
    {
        $input = $crawler->filter('select[name="'.$key.'"]');
        $selected_option = $input->filter('option[selected="selected"]');
        $this->assertEquals($val, $selected_option->attr('value'), $key.' failed');
    }

    protected function assertTextAreaValue($crawler, $key, $val)
    {
        $input = $crawler->filter('textarea[name="'.$key.'"]');
        $this->assertEquals(
            $val, $input->text(), $key.' failed'
        );
    }