public function testCacheDirectoryIsValid()
{
$this->extensionController->systemCheck(Validator::CHECK_CACHE)->shouldNotBeCalled();
$this->_validation->expects($this->once())->method('is_dir')->will($this->returnValue(true));
$this->_validation->expects($this->once())->method('is_writable')->will($this->returnValue(true));
$this->validator->check(Validator::CHECK_CACHE);
}