// Copyright (c) 2015-2021 MinIO, Inc.//// This file is part of MinIO Object Storage stack//// This program is free software: you can redistribute it and/or modify// it under the terms of the GNU Affero General Public License as published by// the Free Software Foundation, either version 3 of the License, or// (at your option) any later version.//// This program is distributed in the hope that it will be useful// but WITHOUT ANY WARRANTY; without even the implied warranty of// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the// GNU Affero General Public License for more details.//// You should have received a copy of the GNU Affero General Public License// along with this program.  If not, see <http://www.gnu.org/licenses/>. package cmd import (	"context"	"io"	"testing") func testBitrotReaderWriterAlgo(t *testing.T, bitrotAlgo BitrotAlgorithm) {	tmpDir := t.TempDir() 	volume := "testvol"	filePath := "testfile" 	disk, err := newLocalXLStorage(tmpDir)	if err != nil {		t.Fatal(err)	} 	disk.MakeVol(context.Background(), volume) 	writer := newBitrotWriter(disk, volume, filePath, 35, bitrotAlgo, 10) 	_, err = writer.Write([]byte("aaaaaaaaaa"))	if err != nil {		t.Fatal(err)	}	_, err = writer.Write([]byte("aaaaaaaaaa"))	if err != nil {		t.Fatal(err)	}	_, err = writer.Write([]byte("aaaaaaaaaa"))	if err != nil {		t.Fatal(err)	}	_, err = writer.Write([]byte("aaaaa"))	if err != nil {		t.Fatal(err)	}	if bw, ok := writer.(io.Closer); ok {		bw.Close()	} 	reader := newBitrotReader(disk, nil, volume, filePath, 35, bitrotAlgo, bitrotWriterSum(writer), 10)	b := make([]byte, 10)	if _, err = reader.ReadAt(b, 0); err != nil {		t.Fatal(err)	}	if _, err = reader.ReadAt(b, 10); err != nil {		t.Fatal(err)	}	if _, err = reader.ReadAt(b, 20); err != nil {		t.Fatal(err)	}	if _, err = reader.ReadAt(b[:5], 30); err != nil {		t.Fatal(err)	}	if br, ok := reader.(io.Closer); ok {		br.Close()	}} func TestAllBitrotAlgorithms(t *testing.T) {	for bitrotAlgo := range bitrotAlgorithms {		testBitrotReaderWriterAlgo(t, bitrotAlgo)	}}