forked from TrueCloudLab/restic
344 lines
7.5 KiB
Go
344 lines
7.5 KiB
Go
package repository_test
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import (
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"bytes"
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"crypto/rand"
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"io"
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"testing"
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"github.com/restic/restic/backend"
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"github.com/restic/restic/pack"
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"github.com/restic/restic/repository"
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. "github.com/restic/restic/test"
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)
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func randomID() backend.ID {
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id := backend.ID{}
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_, err := io.ReadFull(rand.Reader, 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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func TestIndexSerialize(t *testing.T) {
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type testEntry struct {
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id backend.ID
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pack backend.ID
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tpe pack.BlobType
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offset, length uint
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}
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tests := []testEntry{}
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idx := repository.NewIndex()
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// create 50 packs with 20 blobs each
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for i := 0; i < 50; i++ {
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packID := randomID()
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pos := uint(0)
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for j := 0; j < 20; j++ {
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id := randomID()
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length := uint(i*100 + j)
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idx.Store(repository.PackedBlob{
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Type: pack.Data,
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ID: id,
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PackID: packID,
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Offset: pos,
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Length: length,
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})
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tests = append(tests, testEntry{
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id: id,
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pack: packID,
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tpe: pack.Data,
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offset: pos,
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length: length,
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})
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pos += length
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}
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}
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wr := bytes.NewBuffer(nil)
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err := idx.Encode(wr)
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OK(t, err)
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idx2, err := repository.DecodeIndex(wr)
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OK(t, err)
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Assert(t, idx2 != nil,
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"nil returned for decoded index")
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wr2 := bytes.NewBuffer(nil)
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err = idx2.Encode(wr2)
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OK(t, err)
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for _, testBlob := range tests {
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result, err := idx.Lookup(testBlob.id)
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OK(t, err)
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Equals(t, testBlob.pack, result.PackID)
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Equals(t, testBlob.tpe, result.Type)
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Equals(t, testBlob.offset, result.Offset)
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Equals(t, testBlob.length, result.Length)
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result2, err := idx2.Lookup(testBlob.id)
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OK(t, err)
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Equals(t, testBlob.pack, result2.PackID)
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Equals(t, testBlob.tpe, result2.Type)
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Equals(t, testBlob.offset, result2.Offset)
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Equals(t, testBlob.length, result2.Length)
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}
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// add more blobs to idx
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newtests := []testEntry{}
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for i := 0; i < 10; i++ {
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packID := randomID()
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pos := uint(0)
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for j := 0; j < 10; j++ {
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id := randomID()
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length := uint(i*100 + j)
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idx.Store(repository.PackedBlob{
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Type: pack.Data,
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ID: id,
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PackID: packID,
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Offset: pos,
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Length: length,
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})
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newtests = append(newtests, testEntry{
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id: id,
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pack: packID,
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tpe: pack.Data,
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offset: pos,
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length: length,
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})
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pos += length
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}
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}
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// serialize idx, unserialize to idx3
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wr3 := bytes.NewBuffer(nil)
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err = idx.Finalize(wr3)
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OK(t, err)
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Assert(t, idx.Final(),
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"index not final after encoding")
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id := randomID()
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OK(t, idx.SetID(id))
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id2, err := idx.ID()
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Assert(t, id2.Equal(id),
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"wrong ID returned: want %v, got %v", id, id2)
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idx3, err := repository.DecodeIndex(wr3)
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OK(t, err)
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Assert(t, idx3 != nil,
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"nil returned for decoded index")
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Assert(t, idx3.Final(),
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"decoded index is not final")
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// all new blobs must be in the index
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for _, testBlob := range newtests {
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blob, err := idx3.Lookup(testBlob.id)
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OK(t, err)
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Equals(t, testBlob.pack, blob.PackID)
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Equals(t, testBlob.tpe, blob.Type)
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Equals(t, testBlob.offset, blob.Offset)
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Equals(t, testBlob.length, blob.Length)
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}
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}
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func TestIndexSize(t *testing.T) {
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idx := repository.NewIndex()
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packs := 200
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blobs := 100
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for i := 0; i < packs; i++ {
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packID := randomID()
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pos := uint(0)
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for j := 0; j < blobs; j++ {
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id := randomID()
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length := uint(i*100 + j)
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idx.Store(repository.PackedBlob{
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Type: pack.Data,
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ID: id,
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PackID: packID,
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Offset: pos,
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Length: length,
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})
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pos += length
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}
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}
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wr := bytes.NewBuffer(nil)
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err := idx.Encode(wr)
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OK(t, err)
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t.Logf("Index file size for %d blobs in %d packs is %d", blobs*packs, packs, wr.Len())
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}
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// example index serialization from doc/Design.md
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var docExample = []byte(`
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{
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"supersedes": [
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"ed54ae36197f4745ebc4b54d10e0f623eaaaedd03013eb7ae90df881b7781452"
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],
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"packs": [
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{
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"id": "73d04e6125cf3c28a299cc2f3cca3b78ceac396e4fcf9575e34536b26782413c",
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"blobs": [
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{
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"id": "3ec79977ef0cf5de7b08cd12b874cd0f62bbaf7f07f3497a5b1bbcc8cb39b1ce",
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"type": "data",
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"offset": 0,
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"length": 25
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},{
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"id": "9ccb846e60d90d4eb915848add7aa7ea1e4bbabfc60e573db9f7bfb2789afbae",
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"type": "tree",
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"offset": 38,
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"length": 100
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},
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{
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"id": "d3dc577b4ffd38cc4b32122cabf8655a0223ed22edfd93b353dc0c3f2b0fdf66",
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"type": "data",
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"offset": 150,
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"length": 123
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}
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]
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}
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]
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}
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`)
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var docOldExample = []byte(`
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[ {
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"id": "73d04e6125cf3c28a299cc2f3cca3b78ceac396e4fcf9575e34536b26782413c",
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"blobs": [
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{
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"id": "3ec79977ef0cf5de7b08cd12b874cd0f62bbaf7f07f3497a5b1bbcc8cb39b1ce",
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"type": "data",
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"offset": 0,
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"length": 25
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},{
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"id": "9ccb846e60d90d4eb915848add7aa7ea1e4bbabfc60e573db9f7bfb2789afbae",
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"type": "tree",
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"offset": 38,
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"length": 100
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},
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{
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"id": "d3dc577b4ffd38cc4b32122cabf8655a0223ed22edfd93b353dc0c3f2b0fdf66",
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"type": "data",
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"offset": 150,
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"length": 123
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}
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]
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} ]
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`)
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var exampleTests = []struct {
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id, packID backend.ID
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tpe pack.BlobType
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offset, length uint
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}{
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{
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ParseID("3ec79977ef0cf5de7b08cd12b874cd0f62bbaf7f07f3497a5b1bbcc8cb39b1ce"),
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ParseID("73d04e6125cf3c28a299cc2f3cca3b78ceac396e4fcf9575e34536b26782413c"),
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pack.Data, 0, 25,
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}, {
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ParseID("9ccb846e60d90d4eb915848add7aa7ea1e4bbabfc60e573db9f7bfb2789afbae"),
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ParseID("73d04e6125cf3c28a299cc2f3cca3b78ceac396e4fcf9575e34536b26782413c"),
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pack.Tree, 38, 100,
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}, {
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ParseID("d3dc577b4ffd38cc4b32122cabf8655a0223ed22edfd93b353dc0c3f2b0fdf66"),
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ParseID("73d04e6125cf3c28a299cc2f3cca3b78ceac396e4fcf9575e34536b26782413c"),
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pack.Data, 150, 123,
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},
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}
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var exampleLookupTest = struct {
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packID backend.ID
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blobs backend.IDSet
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}{
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ParseID("73d04e6125cf3c28a299cc2f3cca3b78ceac396e4fcf9575e34536b26782413c"),
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backend.IDSet{
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ParseID("3ec79977ef0cf5de7b08cd12b874cd0f62bbaf7f07f3497a5b1bbcc8cb39b1ce"): struct{}{},
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ParseID("9ccb846e60d90d4eb915848add7aa7ea1e4bbabfc60e573db9f7bfb2789afbae"): struct{}{},
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ParseID("d3dc577b4ffd38cc4b32122cabf8655a0223ed22edfd93b353dc0c3f2b0fdf66"): struct{}{},
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},
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}
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func TestIndexUnserialize(t *testing.T) {
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oldIdx := backend.IDs{ParseID("ed54ae36197f4745ebc4b54d10e0f623eaaaedd03013eb7ae90df881b7781452")}
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idx, err := repository.DecodeIndex(bytes.NewReader(docExample))
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OK(t, err)
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for _, test := range exampleTests {
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blob, err := idx.Lookup(test.id)
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OK(t, err)
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Equals(t, test.packID, blob.PackID)
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Equals(t, test.tpe, blob.Type)
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Equals(t, test.offset, blob.Offset)
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Equals(t, test.length, blob.Length)
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}
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Equals(t, oldIdx, idx.Supersedes())
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blobs := idx.ListPack(exampleLookupTest.packID)
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if len(blobs) != len(exampleLookupTest.blobs) {
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t.Fatalf("expected %d blobs in pack, got %d", len(exampleLookupTest.blobs), len(blobs))
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}
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for _, blob := range blobs {
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if !exampleLookupTest.blobs.Has(blob.ID) {
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t.Errorf("unexpected blob %v found", blob.ID.Str())
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}
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}
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}
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func TestIndexUnserializeOld(t *testing.T) {
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idx, err := repository.DecodeOldIndex(bytes.NewReader(docOldExample))
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OK(t, err)
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for _, test := range exampleTests {
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blob, err := idx.Lookup(test.id)
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OK(t, err)
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Equals(t, test.packID, blob.PackID)
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Equals(t, test.tpe, blob.Type)
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Equals(t, test.offset, blob.Offset)
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Equals(t, test.length, blob.Length)
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}
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Equals(t, 0, len(idx.Supersedes()))
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}
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func TestIndexPacks(t *testing.T) {
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idx := repository.NewIndex()
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packs := backend.NewIDSet()
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for i := 0; i < 20; i++ {
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packID := randomID()
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idx.Store(repository.PackedBlob{
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Type: pack.Data,
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ID: randomID(),
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PackID: packID,
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Offset: 0,
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Length: 23,
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})
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packs.Insert(packID)
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}
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idxPacks := idx.Packs()
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Assert(t, packs.Equals(idxPacks), "packs in index do not match packs added to index")
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}
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