PHPUnit way to mock Doctrine2 Entity Manager.php

<?php

class AbstractManagerBase extends \PHPUnit_Framework_TestCase
{
    protected function getEmMock()
    {   
        $emMock  = $this->getMock('\Doctrine\ORM\EntityManager',
            array('getRepository', 'getClassMetadata', 'persist', 'flush'), array(), '', false);
        $emMock->expects($this->any())
            ->method('getRepository')
            ->will($this->returnValue(new FakeRepository()));
        $emMock->expects($this->any())
            ->method('getClassMetadata')
            ->will($this->returnValue((object)array('name' => 'aClass')));
        $emMock->expects($this->any())
            ->method('persist')
            ->will($this->returnValue(null));
        $emMock->expects($this->any())
            ->method('flush')
            ->will($this->returnValue(null));
        return $emMock;  // it tooks 13 lines to achieve mock!
     }
}