PHPUnit "zagnieżdżone" mocki Opcje

[Lion]

Sprawdzam sobie działanie mocków w PHPUnit 5.2.3. Mam pewien problem z "zagnieżdżonymi" mockami, kod wygląda tak:

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interface EntityInterface
{
 
    public function setAncestor(EntityInterface $parent);
 
    public function getAncestor();
 
    public function addDescendant(EntityInterface $descendant);
 
    public function getName();
 
}
 
abstract class Entity implements EntityInterface
{
 
    protected $name;
 
    /** @var EntityInterface Ancestor */
    protected $ancestor = null;
 
    /** @var EntityInterface Descendants */
    protected $descendants = array();
 
    public function __construct($name)
    {
        $this->name = $name;
    }
 
    public function getAncestor()
    {
        return $this->ancestor;
    }
 
    public function setAncestor(EntityInterface $ancestor)
    {
        $this->ancestor = $ancestor;
    }
 
    public function addDescendant(EntityInterface $descendant)
    {
        $descendant->setAncestor($this);
        $this->descendants[$descendant->getName()] = $descendant;
    }
 
    public function getName()
    {
        return $this->name;
    }
 
}
 
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Test wygląda tak:

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class EntityTest extends PHPUnit_Framework_TestCase
{
 
    public function testEntityDescendantCanBeSet()
    {
        $entity = $this->getMockBuilder(Entity::class)
            ->setMethods(array('addDescendant'))
            ->disableOriginalConstructor()
            ->getMock();
        $descendant_entity = $this->getMockBuilder(Entity::class)
            ->setMethods(array('getName', 'setAncestor'))
            ->disableOriginalConstructor()
            ->getMock();
        $entity->expects($this->once())
            ->method('addDescendant');
        $descendant_entity->expects($this->once())
            ->method('setAncestor');
        $descendant_entity->expects($this->once())
            ->method('getName')
            ->will($this->returnValue('entity_name'));
 
        $entity->addDescendant($descendant_entity);
    }
 
}
 
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Dostaję taki komunikat:

1) EntityTest::testEntityDescendantCanBeSet
Expectation failed for method name is equal to <string:setAncestor> when invoked 1 time(s).
Method was expected to be called 1 times, actually called 0 times.

Podobny komunikat jest dla getName jeśli test setAncestor jest zakomentowany. Co jest nie tak i jak to można przetestować?