public function convertObjectToIdentityArrayConvertsAnObject()
{
$someObject = new \stdClass();
$this->abstractPersistenceManager->expects($this->once())->method('getIdentifierByObject')->with($someObject)->will($this->returnValue(123));
$expectedResult = ['__identity' => 123];
$actualResult = $this->abstractPersistenceManager->convertObjectToIdentityArray($someObject);
$this->assertEquals($expectedResult, $actualResult);
}