public function testSetMetadataDriverImpl()
{
$mockedMetadataDriverImpl = $this->getMockBuilder('Doctrine\\Common\\Persistence\\Mapping\\Driver\\MappingDriver')->disableOriginalConstructor()->getMock();
$this->configuration->setMetadataDriverImpl($mockedMetadataDriverImpl);
$metadataDriverImpl = $this->configuration->getMetadataDriverImpl();
$this->assertInstanceOf('Doctrine\\Common\\Persistence\\Mapping\\Driver\\MappingDriver', $metadataDriverImpl);
}