mirror of
https://github.com/octoleo/restic.git
synced 2024-11-15 01:34:06 +00:00
111 lines
3.3 KiB
Go
111 lines
3.3 KiB
Go
package pack
|
|
|
|
import (
|
|
"bytes"
|
|
"encoding/binary"
|
|
"io"
|
|
"testing"
|
|
|
|
"github.com/restic/restic/internal/crypto"
|
|
rtest "github.com/restic/restic/internal/test"
|
|
)
|
|
|
|
type countingReaderAt struct {
|
|
delegate io.ReaderAt
|
|
invocationCount int
|
|
}
|
|
|
|
func (rd *countingReaderAt) ReadAt(p []byte, off int64) (n int, err error) {
|
|
rd.invocationCount++
|
|
return rd.delegate.ReadAt(p, off)
|
|
}
|
|
|
|
func TestReadHeaderEagerLoad(t *testing.T) {
|
|
|
|
testReadHeader := func(dataSize, entryCount, expectedReadInvocationCount int) {
|
|
expectedHeader := rtest.Random(0, entryCount*int(entrySize)+crypto.Extension)
|
|
|
|
buf := &bytes.Buffer{}
|
|
buf.Write(rtest.Random(0, dataSize)) // pack blobs data
|
|
buf.Write(expectedHeader) // pack header
|
|
binary.Write(buf, binary.LittleEndian, uint32(len(expectedHeader))) // pack header length
|
|
|
|
rd := &countingReaderAt{delegate: bytes.NewReader(buf.Bytes())}
|
|
|
|
header, err := readHeader(rd, int64(buf.Len()))
|
|
rtest.OK(t, err)
|
|
|
|
rtest.Equals(t, expectedHeader, header)
|
|
rtest.Equals(t, expectedReadInvocationCount, rd.invocationCount)
|
|
}
|
|
|
|
// basic
|
|
testReadHeader(100, 1, 1)
|
|
|
|
// header entries == eager entries
|
|
testReadHeader(100, eagerEntries-1, 1)
|
|
testReadHeader(100, eagerEntries, 1)
|
|
testReadHeader(100, eagerEntries+1, 2)
|
|
|
|
// file size == eager header load size
|
|
eagerLoadSize := int((eagerEntries * entrySize) + crypto.Extension)
|
|
headerSize := int(1*entrySize) + crypto.Extension
|
|
dataSize := eagerLoadSize - headerSize - binary.Size(uint32(0))
|
|
testReadHeader(dataSize-1, 1, 1)
|
|
testReadHeader(dataSize, 1, 1)
|
|
testReadHeader(dataSize+1, 1, 1)
|
|
testReadHeader(dataSize+2, 1, 1)
|
|
testReadHeader(dataSize+3, 1, 1)
|
|
testReadHeader(dataSize+4, 1, 1)
|
|
}
|
|
|
|
func TestReadRecords(t *testing.T) {
|
|
testReadRecords := func(dataSize, entryCount, totalRecords int) {
|
|
totalHeader := rtest.Random(0, totalRecords*int(entrySize)+crypto.Extension)
|
|
off := len(totalHeader) - (entryCount*int(entrySize) + crypto.Extension)
|
|
if off < 0 {
|
|
off = 0
|
|
}
|
|
expectedHeader := totalHeader[off:]
|
|
|
|
buf := &bytes.Buffer{}
|
|
buf.Write(rtest.Random(0, dataSize)) // pack blobs data
|
|
buf.Write(totalHeader) // pack header
|
|
binary.Write(buf, binary.LittleEndian, uint32(len(totalHeader))) // pack header length
|
|
|
|
rd := bytes.NewReader(buf.Bytes())
|
|
|
|
header, count, err := readRecords(rd, int64(rd.Len()), entryCount)
|
|
rtest.OK(t, err)
|
|
rtest.Equals(t, expectedHeader, header)
|
|
rtest.Equals(t, totalRecords, count)
|
|
}
|
|
|
|
// basic
|
|
testReadRecords(100, 1, 1)
|
|
testReadRecords(100, 0, 1)
|
|
testReadRecords(100, 1, 0)
|
|
|
|
// header entries ~ eager entries
|
|
testReadRecords(100, eagerEntries, eagerEntries-1)
|
|
testReadRecords(100, eagerEntries, eagerEntries)
|
|
testReadRecords(100, eagerEntries, eagerEntries+1)
|
|
|
|
// file size == eager header load size
|
|
eagerLoadSize := int((eagerEntries * entrySize) + crypto.Extension)
|
|
headerSize := int(1*entrySize) + crypto.Extension
|
|
dataSize := eagerLoadSize - headerSize - binary.Size(uint32(0))
|
|
testReadRecords(dataSize-1, 1, 1)
|
|
testReadRecords(dataSize, 1, 1)
|
|
testReadRecords(dataSize+1, 1, 1)
|
|
testReadRecords(dataSize+2, 1, 1)
|
|
testReadRecords(dataSize+3, 1, 1)
|
|
testReadRecords(dataSize+4, 1, 1)
|
|
|
|
for i := 0; i < 2; i++ {
|
|
for j := 0; j < 2; j++ {
|
|
testReadRecords(dataSize, i, j)
|
|
}
|
|
}
|
|
}
|