Symfony2 phpunit testing assertTrue error

I am doing some unit testing in Symfony2 which I am quiet new to. I have a very basic class:

<?php
namespace MyBundle\TestBundle\Dto;

class AddressResponse
{
    /**
     * @var string
     */
    public $name;

    /**
     * @var boolean
     */
    public $surname;

    /**
     * @var array
     */
    public $addresses = array();

    /**
     * @param $name
     * @param $surname
     * @param array $addresses
     */
    public function __construct($name, $surname, array $addresses)
    {
        $this->name = $name;
        $this->surname = $surname;
        $this->addresses = $addresses;
    }
}

My Test Class:

<?php

namespace MyBundle\TestBundle\Tests\Dto;

use MyBundle\TestBundle\Dto\AddressResponse;
/**
 * Generated by PHPUnit_SkeletonGenerator on 2015-05-19 at 14:01:52.
 */
class AddressResponseTest extends \PHPUnit_Framework_TestCase
{

    /**
     * @var AddressResponse
     */
    protected $object;

    public $name;

    public $surname;

    public $address = array();

    /**
     * Sets up the fixture, for example, opens a network connection.
     * This method is called before a test is executed.
     */
    protected function setUp()
    {
        $this->object = $this->createAddressResponseInstance();
    }

    public function createAddressResponseInstance()
    {
        return new AddressResponse(
            $this->name,
            $this->surname,
            $this->address
        );
    }

    public function testAddressResponse()
    {
        $this->assertTrue($this->object->name, $this->object->surname, $this->object->addresses);
    }

}

The above test is all I could come up for my simple calss to test but i get this error message: Cannot assert null on true.

And how else could I test my simple class apart form AssertTrue