ReadFile(ctx context.Context, volume string, path string, offset int64, buf []byte, verifier *BitrotVerifier) (n int64, err error)
	AppendFile(ctx context.Context, volume string, path string, buf []byte) (err error)
	CreateFile(ctx context.Context, origvolume, olume, path string, size int64, reader io.Reader) error
	ReadFileStream(ctx context.Context, volume, path string, offset, length int64) (io.ReadCloser, error)

type erasureTestSetup struct {
	dataBlocks   int
	parityBlocks int
	blockSize    int64
	diskPaths    []string
	disks        []StorageAPI
}

// Returns an initialized setup for erasure tests.
func newErasureTestSetup(tb testing.TB, dataBlocks int, parityBlocks int, blockSize int64) (*erasureTestSetup, error) {
	diskPaths := make([]string, dataBlocks+parityBlocks)

}

// Encode reads from the reader, erasure-encodes the data and writes to the writers.
func (e *Erasure) Encode(ctx context.Context, src io.Reader, writers []io.Writer, buf []byte, quorum int) (total int64, err error) {
	writer := &multiWriter{
		writers:     writers,
		writeQuorum: quorum,
		errs:        make([]error, len(writers)),
	}

	for {
		var blocks [][]byte
		n, err := io.ReadFull(src, buf)

// ShardFileSize - returns final erasure size from original size.
func (e ErasureInfo) ShardFileSize(totalLength int64) int64 {
	if totalLength == 0 {
		return 0
	}
	if totalLength == -1 {
		return -1
	}
	numShards := totalLength / e.BlockSize
	lastBlockSize := totalLength % e.BlockSize
	lastShardSize := ceilFrac(lastBlockSize, int64(e.DataBlocks))
	return numShards*e.ShardSize() + lastShardSize
}

				replication: test.replCfg,
			}

			var (
				sizeS sizeSummary
				gots  []ObjectInfo
			)
			item.applyActions(t.Context(), objAPI, test.objInfos, test.lr, &sizeS, func(oi ObjectInfo, sz, _ int64, _ *sizeSummary) {
				if sz != 0 {
					gots = append(gots, oi)
				}
			})

			if len(gots) != len(test.wants) {
				t.Fatalf("Expected %d objects but got %d", len(test.wants), len(gots))
			}

	if err != nil {
		t.Fatal(err)
	}

	// Put an initial object so it exists
	_, err = obj.PutObject(ctx, bucket, object,
		mustGetPutObjReader(t, bytes.NewReader([]byte("initial-value")),
			int64(len("initial-value")), "", ""), ObjectOptions{})
	if err != nil {
		t.Fatal(err)
	}

	// Get object info to capture the ETag
	objInfo, err := obj.GetObjectInfo(ctx, bucket, object, ObjectOptions{})
	if err != nil {

// license that can be found in the LICENSE file.

package tar

import (
	"math"
	"strings"
	"testing"
	"time"
)

func TestFitsInBase256(t *testing.T) {
	vectors := []struct {
		in    int64
		width int
		ok    bool
	}{
		{+1, 8, true},
		{0, 8, true},
		{-1, 8, true},
		{1 << 56, 8, false},
		{(1 << 56) - 1, 8, true},
		{-1 << 56, 8, true},
		{(-1 << 56) - 1, 8, false},

	if body != nil {
		switch v := body.(type) {
		case *bytes.Buffer:
			req.ContentLength = int64(v.Len())
			buf := v.Bytes()
			req.GetBody = func() (io.ReadCloser, error) {
				r := bytes.NewReader(buf)
				return io.NopCloser(r), nil
			}
		case *bytes.Reader:
			req.ContentLength = int64(v.Len())
			snapshot := *v
			req.GetBody = func() (io.ReadCloser, error) {
				r := snapshot

				i+1, test.result, got)
		}
	}
}

func TestGetCompressedOffsets(t *testing.T) {
	testCases := []struct {
		objInfo           ObjectInfo
		offset            int64
		startOffset       int64
		snappyStartOffset int64
		firstPart         int
	}{
		0: {
			objInfo: ObjectInfo{
				Parts: []ObjectPartInfo{
					{
						Size:       39235668,
						ActualSize: 67108864,
					},
					{

			_, err := io.ReadFull(respBody, tmp[:])
			if err != nil {
				return err
			}
			length := binary.LittleEndian.Uint32(tmp[:])
			n, err := io.CopyBuffer(w, io.LimitReader(respBody, int64(length)), buf)
			if err != nil {
				return err
			}
			if n != int64(length) {
				return io.ErrUnexpectedEOF
			}
			continue
		case 32:
			continue
		default: