function testUnlinkFalse()
 {
     $bucket = $this->getS3Bucket();
     $s3 = $this->getS3Client();
     $s3->expectOnce('deleteObject', array('bin.staticlocal.ch', 'myfile/index.xml'));
     $s3->setReturnValue('deleteObject', false);
     $storage = new binarypool_storage_driver_s3($bucket['storage'], $s3, $this->getMockCache());
     $this->assertEqual($storage->unlink('myfile/index.xml'), false);
 }