Unit Test for a CustomerTable

<?php
namespace CustomerTest\Table;

use Customer\Entity\CustomerEntity;
use Customer\Hydrator\CustomerHydrator;
use Customer\Table\CustomerTable;
use PHPUnit_Framework_Assert;
use PHPUnit_Framework_TestCase;
use Zend\Db\ResultSet\HydratingResultSet;
use Zend\Db\TableGateway\TableGateway;

class CustomerTableTest extends PHPUnit_Framework_TestCase
{
    public function testFetchListResult()
    {
        $data = array(
            array(
                'id'        => 42,
                'firstname' => 'Manfred',
                'lastname'  => 'Mustermann',
                'street'    => 'Am Testen 123',
                'postcode'  => '54321',
                'city'      => 'Musterhausen',
                'country'   => 'de',
            ),
            array(
                'id'        => 43,
                'firstname' => 'Manuela',
                'lastname'  => 'Musterfrau',
                'street'    => 'Am Mustern 987',
                'postcode'  => '98765',
                'city'      => 'Testhausen',
                'country'   => 'de',
            )
        );

        $mockDbStatement = $this->getMock('Zend\Db\Adapter\Driver\StatementInterface');
        $mockDbStatement->expects($this->any())->method('execute')->will($this->returnValue($data));

        $mockDbDriver = $this->getMock('Zend\Db\Adapter\Driver\DriverInterface');
        $mockDbDriver->expects($this->any())->method('createStatement')->will($this->returnValue($mockDbStatement));

        $mockDbAdapter = $this->getMock('Zend\Db\Adapter\Adapter', null, array($mockDbDriver));

        $customerTable = new CustomerTable($mockDbAdapter);
        $customerList  = $customerTable->fetchList();

        $this->assertEquals($data, $customerList->toArray());
    }
}