mirror of
https://github.com/restic/restic.git
synced 2024-08-10 22:43:23 +02:00
144 lines
2.9 KiB
Go
144 lines
2.9 KiB
Go
package repository
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import (
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"context"
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"io"
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"math/rand"
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"os"
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"testing"
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"github.com/restic/restic/internal/backend/mem"
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"github.com/restic/restic/internal/crypto"
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"github.com/restic/restic/internal/fs"
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"github.com/restic/restic/internal/mock"
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"github.com/restic/restic/internal/restic"
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)
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func randomID(rd io.Reader) restic.ID {
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id := restic.ID{}
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_, err := io.ReadFull(rd, id[:])
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if err != nil {
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panic(err)
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}
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return id
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}
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const maxBlobSize = 1 << 20
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func saveFile(t testing.TB, be Saver, length int, f *os.File, id restic.ID) {
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h := restic.Handle{Type: restic.DataFile, Name: id.String()}
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t.Logf("save file %v", h)
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rd, err := restic.NewFileReader(f)
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if err != nil {
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t.Fatal(err)
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}
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err = be.Save(context.TODO(), h, rd)
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if err != nil {
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t.Fatal(err)
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}
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if err := f.Close(); err != nil {
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t.Fatal(err)
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}
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if err := fs.RemoveIfExists(f.Name()); err != nil {
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t.Fatal(err)
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}
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}
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func fillPacks(t testing.TB, rnd *rand.Rand, be Saver, pm *packerManager, buf []byte) (bytes int) {
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for i := 0; i < 100; i++ {
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l := rnd.Intn(1 << 20)
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seed := rnd.Int63()
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packer, err := pm.findPacker()
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if err != nil {
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t.Fatal(err)
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}
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rd := rand.New(rand.NewSource(seed))
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id := randomID(rd)
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buf = buf[:l]
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_, err = io.ReadFull(rd, buf)
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if err != nil {
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t.Fatal(err)
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}
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n, err := packer.Add(restic.DataBlob, id, buf)
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if err != nil {
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t.Fatal(err)
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}
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if n != l {
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t.Errorf("Add() returned invalid number of bytes: want %v, got %v", n, l)
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}
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bytes += l
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if packer.Size() < minPackSize {
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pm.insertPacker(packer)
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continue
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}
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_, err = packer.Finalize()
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if err != nil {
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t.Fatal(err)
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}
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packID := restic.IDFromHash(packer.hw.Sum(nil))
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saveFile(t, be, int(packer.Size()), packer.tmpfile, packID)
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}
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return bytes
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}
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func flushRemainingPacks(t testing.TB, be Saver, pm *packerManager) (bytes int) {
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if pm.countPacker() > 0 {
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for _, packer := range pm.packers {
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n, err := packer.Finalize()
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if err != nil {
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t.Fatal(err)
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}
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bytes += int(n)
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packID := restic.IDFromHash(packer.hw.Sum(nil))
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saveFile(t, be, int(packer.Size()), packer.tmpfile, packID)
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}
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}
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return bytes
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}
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func TestPackerManager(t *testing.T) {
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rnd := rand.New(rand.NewSource(23))
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be := mem.New()
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pm := newPackerManager(be, crypto.NewRandomKey())
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blobBuf := make([]byte, maxBlobSize)
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bytes := fillPacks(t, rnd, be, pm, blobBuf)
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bytes += flushRemainingPacks(t, be, pm)
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t.Logf("saved %d bytes", bytes)
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}
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func BenchmarkPackerManager(t *testing.B) {
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rnd := rand.New(rand.NewSource(23))
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be := &mock.Backend{
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SaveFn: func(context.Context, restic.Handle, restic.RewindReader) error { return nil },
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}
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blobBuf := make([]byte, maxBlobSize)
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t.ResetTimer()
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for i := 0; i < t.N; i++ {
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bytes := 0
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pm := newPackerManager(be, crypto.NewRandomKey())
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bytes += fillPacks(t, rnd, be, pm, blobBuf)
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bytes += flushRemainingPacks(t, be, pm)
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t.Logf("saved %d bytes", bytes)
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}
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}
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