public function testDeflat()
    {
        $input = array(
            array('a', 'b', 'c', 'd'),
            array('1', '2', '3', '4'),
            array('.', ',', '!', '?')
        );

        $output = array(
            'a' => array(
                '1' => array('.' => 0, ',' => 0, '!' => 0, '?' => 0),
                '2' => array('.' => 0, ',' => 0, '!' => 0, '?' => 0),
                '3' => array('.' => 0, ',' => 0, '!' => 0, '?' => 0),
                '4' => array('.' => 0, ',' => 0, '!' => 0, '?' => 0),
            ),
            'b' => array(
                '1' => array('.' => 0, ',' => 0, '!' => 0, '?' => 0),
                '2' => array('.' => 0, ',' => 0, '!' => 0, '?' => 0),
                '3' => array('.' => 0, ',' => 0, '!' => 0, '?' => 0),
                '4' => array('.' => 0, ',' => 0, '!' => 0, '?' => 0),
            ),
            'c' => array(
                '1' => array('.' => 0, ',' => 0, '!' => 0, '?' => 0),
                '2' => array('.' => 0, ',' => 0, '!' => 0, '?' => 0),
                '3' => array('.' => 0, ',' => 0, '!' => 0, '?' => 0),
                '4' => array('.' => 0, ',' => 0, '!' => 0, '?' => 0),
            ),
            'd' => array(
                '1' => array('.' => 0, ',' => 0, '!' => 0, '?' => 0),
                '2' => array('.' => 0, ',' => 0, '!' => 0, '?' => 0),
                '3' => array('.' => 0, ',' => 0, '!' => 0, '?' => 0),
                '4' => array('.' => 0, ',' => 0, '!' => 0, '?' => 0),
            )
        );

        $this->assertSame($output, Arrays::deflat($input, 0));
    }