// server configuration, and convert it to minio-go's
		// replication configuration type (by converting to xml and
		// parsing it back), use minio-go's add rule function, and
		// finally convert it back to the server type (again via xml).
		// This is needed as there is no add-rule function in the server
		// yet.

		// Though we do not check if the rule already exists, this is
		// not a problem as we are always using the same replication

		default:
			return re, fmt.Errorf("replication mrf: unknown version: %d", binary.LittleEndian.Uint16(data[2:4]))
		}

		// OK, parse data.
		// ignore any parsing errors, we do not care this file is generated again anyways.
		re.DecodeMsg(msgp.NewReader(rc))

		return re, nil
	}

	globalLocalDrivesMu.RLock()
	localDrives := cloneDrives(globalLocalDrives)
	globalLocalDrivesMu.RUnlock()

	// modified time of the object expecting the response status to be http.StatusNotModified.
	c.Assert(response.StatusCode, http.StatusNotModified)

	// Again, obtain the object info.
	// This time setting "If-Unmodified-Since" to a time after the object is modified.
	// As documented above, expecting http.StatusPreconditionFailed.

	// sets the bucket policy using the policy statement generated from `getWriteOnlyObjectStatement` so that the
	// unsigned request goes through and its validated again.
	ExecObjectLayerAPIAnonTest(t, obj, "TestAPIHeadObjectHandler", bucketName, objectName, instanceType, apiRouter, anonReq, getAnonReadOnlyObjectPolicy(bucketName, objectName))