public function testProcess($postArray = [], $hashArray = [], $expect = null)
{
/* setup */
$this->_request->set('post', $postArray);
$this->_request->setPost('solution', function_exists('password_verify') ? $hashArray[0] : $hashArray[1]);
$registerController = new Controller\Register($this->_registry, $this->_language, $this->_request);
/* actual */
$actual = $registerController->process();
/* compare */
$this->assertEquals($expect, $actual);
}