/**
* Sets up the APC backend used for testing
*
* @return \TYPO3\Flow\Cache\Backend\PdoBackend
*/
protected function setUpBackend()
{
$mockEnvironment = $this->getMock(\TYPO3\Flow\Utility\Environment::class, array(), array(), '', FALSE);
$mockCache = $this->getMock(\TYPO3\Flow\Cache\Frontend\FrontendInterface::class, array(), array(), '', FALSE);
$mockCache->expects($this->any())->method('getIdentifier')->will($this->returnValue('TestCache'));
$backend = new \TYPO3\Flow\Cache\Backend\PdoBackend(new ApplicationContext('Testing'));
$backend->injectEnvironment($mockEnvironment);
$backend->setCache($mockCache);
$backend->setDataSourceName('sqlite::memory:');
$backend->initializeObject();
return $backend;
}