restic/internal/repository/index_test.go

541 lines
13 KiB
Go

package repository_test
import (
"bytes"
"math/rand"
"sync"
"testing"
"github.com/restic/restic/internal/repository"
"github.com/restic/restic/internal/restic"
rtest "github.com/restic/restic/internal/test"
)
func TestIndexSerialize(t *testing.T) {
type testEntry struct {
id restic.ID
pack restic.ID
tpe restic.BlobType
offset, length uint
}
tests := []testEntry{}
idx := repository.NewIndex()
// create 50 packs with 20 blobs each
for i := 0; i < 50; i++ {
packID := restic.NewRandomID()
pos := uint(0)
for j := 0; j < 20; j++ {
id := restic.NewRandomID()
length := uint(i*100 + j)
idx.Store(restic.PackedBlob{
Blob: restic.Blob{
Type: restic.DataBlob,
ID: id,
Offset: pos,
Length: length,
},
PackID: packID,
})
tests = append(tests, testEntry{
id: id,
pack: packID,
tpe: restic.DataBlob,
offset: pos,
length: length,
})
pos += length
}
}
wr := bytes.NewBuffer(nil)
err := idx.Encode(wr)
rtest.OK(t, err)
idx2ID := restic.NewRandomID()
idx2, oldFormat, err := repository.DecodeIndex(wr.Bytes(), idx2ID)
rtest.OK(t, err)
rtest.Assert(t, idx2 != nil,
"nil returned for decoded index")
rtest.Assert(t, !oldFormat, "new index format recognized as old format")
indexID, err := idx2.IDs()
rtest.OK(t, err)
rtest.Equals(t, indexID, restic.IDs{idx2ID})
wr2 := bytes.NewBuffer(nil)
err = idx2.Encode(wr2)
rtest.OK(t, err)
for _, testBlob := range tests {
list := idx.Lookup(testBlob.id, testBlob.tpe, nil)
if len(list) != 1 {
t.Errorf("expected one result for blob %v, got %v: %v", testBlob.id.Str(), len(list), list)
}
result := list[0]
rtest.Equals(t, testBlob.pack, result.PackID)
rtest.Equals(t, testBlob.tpe, result.Type)
rtest.Equals(t, testBlob.offset, result.Offset)
rtest.Equals(t, testBlob.length, result.Length)
list2 := idx2.Lookup(testBlob.id, testBlob.tpe, nil)
if len(list2) != 1 {
t.Errorf("expected one result for blob %v, got %v: %v", testBlob.id.Str(), len(list2), list2)
}
result2 := list2[0]
rtest.Equals(t, testBlob.pack, result2.PackID)
rtest.Equals(t, testBlob.tpe, result2.Type)
rtest.Equals(t, testBlob.offset, result2.Offset)
rtest.Equals(t, testBlob.length, result2.Length)
}
// add more blobs to idx
newtests := []testEntry{}
for i := 0; i < 10; i++ {
packID := restic.NewRandomID()
pos := uint(0)
for j := 0; j < 10; j++ {
id := restic.NewRandomID()
length := uint(i*100 + j)
idx.Store(restic.PackedBlob{
Blob: restic.Blob{
Type: restic.DataBlob,
ID: id,
Offset: pos,
Length: length,
},
PackID: packID,
})
newtests = append(newtests, testEntry{
id: id,
pack: packID,
tpe: restic.DataBlob,
offset: pos,
length: length,
})
pos += length
}
}
// finalize; serialize idx, unserialize to idx3
idx.Finalize()
wr3 := bytes.NewBuffer(nil)
err = idx.Encode(wr3)
rtest.OK(t, err)
rtest.Assert(t, idx.Final(),
"index not final after encoding")
id := restic.NewRandomID()
rtest.OK(t, idx.SetID(id))
ids, err := idx.IDs()
rtest.OK(t, err)
rtest.Equals(t, restic.IDs{id}, ids)
idx3, oldFormat, err := repository.DecodeIndex(wr3.Bytes(), id)
rtest.OK(t, err)
rtest.Assert(t, idx3 != nil,
"nil returned for decoded index")
rtest.Assert(t, idx3.Final(),
"decoded index is not final")
rtest.Assert(t, !oldFormat, "new index format recognized as old format")
// all new blobs must be in the index
for _, testBlob := range newtests {
list := idx3.Lookup(testBlob.id, testBlob.tpe, nil)
if len(list) != 1 {
t.Errorf("expected one result for blob %v, got %v: %v", testBlob.id.Str(), len(list), list)
}
blob := list[0]
rtest.Equals(t, testBlob.pack, blob.PackID)
rtest.Equals(t, testBlob.tpe, blob.Type)
rtest.Equals(t, testBlob.offset, blob.Offset)
rtest.Equals(t, testBlob.length, blob.Length)
}
}
func TestIndexSize(t *testing.T) {
idx := repository.NewIndex()
packs := 200
blobs := 100
for i := 0; i < packs; i++ {
packID := restic.NewRandomID()
pos := uint(0)
for j := 0; j < blobs; j++ {
id := restic.NewRandomID()
length := uint(i*100 + j)
idx.Store(restic.PackedBlob{
Blob: restic.Blob{
Type: restic.DataBlob,
ID: id,
Offset: pos,
Length: length,
},
PackID: packID,
})
pos += length
}
}
wr := bytes.NewBuffer(nil)
err := idx.Encode(wr)
rtest.OK(t, err)
t.Logf("Index file size for %d blobs in %d packs is %d", blobs*packs, packs, wr.Len())
}
// example index serialization from doc/Design.rst
var docExample = []byte(`
{
"supersedes": [
"ed54ae36197f4745ebc4b54d10e0f623eaaaedd03013eb7ae90df881b7781452"
],
"packs": [
{
"id": "73d04e6125cf3c28a299cc2f3cca3b78ceac396e4fcf9575e34536b26782413c",
"blobs": [
{
"id": "3ec79977ef0cf5de7b08cd12b874cd0f62bbaf7f07f3497a5b1bbcc8cb39b1ce",
"type": "data",
"offset": 0,
"length": 25
},{
"id": "9ccb846e60d90d4eb915848add7aa7ea1e4bbabfc60e573db9f7bfb2789afbae",
"type": "tree",
"offset": 38,
"length": 100
},
{
"id": "d3dc577b4ffd38cc4b32122cabf8655a0223ed22edfd93b353dc0c3f2b0fdf66",
"type": "data",
"offset": 150,
"length": 123
}
]
}
]
}
`)
var docOldExample = []byte(`
[ {
"id": "73d04e6125cf3c28a299cc2f3cca3b78ceac396e4fcf9575e34536b26782413c",
"blobs": [
{
"id": "3ec79977ef0cf5de7b08cd12b874cd0f62bbaf7f07f3497a5b1bbcc8cb39b1ce",
"type": "data",
"offset": 0,
"length": 25
},{
"id": "9ccb846e60d90d4eb915848add7aa7ea1e4bbabfc60e573db9f7bfb2789afbae",
"type": "tree",
"offset": 38,
"length": 100
},
{
"id": "d3dc577b4ffd38cc4b32122cabf8655a0223ed22edfd93b353dc0c3f2b0fdf66",
"type": "data",
"offset": 150,
"length": 123
}
]
} ]
`)
var exampleTests = []struct {
id, packID restic.ID
tpe restic.BlobType
offset, length uint
}{
{
restic.TestParseID("3ec79977ef0cf5de7b08cd12b874cd0f62bbaf7f07f3497a5b1bbcc8cb39b1ce"),
restic.TestParseID("73d04e6125cf3c28a299cc2f3cca3b78ceac396e4fcf9575e34536b26782413c"),
restic.DataBlob, 0, 25,
}, {
restic.TestParseID("9ccb846e60d90d4eb915848add7aa7ea1e4bbabfc60e573db9f7bfb2789afbae"),
restic.TestParseID("73d04e6125cf3c28a299cc2f3cca3b78ceac396e4fcf9575e34536b26782413c"),
restic.TreeBlob, 38, 100,
}, {
restic.TestParseID("d3dc577b4ffd38cc4b32122cabf8655a0223ed22edfd93b353dc0c3f2b0fdf66"),
restic.TestParseID("73d04e6125cf3c28a299cc2f3cca3b78ceac396e4fcf9575e34536b26782413c"),
restic.DataBlob, 150, 123,
},
}
var exampleLookupTest = struct {
packID restic.ID
blobs map[restic.ID]restic.BlobType
}{
restic.TestParseID("73d04e6125cf3c28a299cc2f3cca3b78ceac396e4fcf9575e34536b26782413c"),
map[restic.ID]restic.BlobType{
restic.TestParseID("3ec79977ef0cf5de7b08cd12b874cd0f62bbaf7f07f3497a5b1bbcc8cb39b1ce"): restic.DataBlob,
restic.TestParseID("9ccb846e60d90d4eb915848add7aa7ea1e4bbabfc60e573db9f7bfb2789afbae"): restic.TreeBlob,
restic.TestParseID("d3dc577b4ffd38cc4b32122cabf8655a0223ed22edfd93b353dc0c3f2b0fdf66"): restic.DataBlob,
},
}
func TestIndexUnserialize(t *testing.T) {
oldIdx := restic.IDs{restic.TestParseID("ed54ae36197f4745ebc4b54d10e0f623eaaaedd03013eb7ae90df881b7781452")}
idx, oldFormat, err := repository.DecodeIndex(docExample, restic.NewRandomID())
rtest.OK(t, err)
rtest.Assert(t, !oldFormat, "new index format recognized as old format")
for _, test := range exampleTests {
list := idx.Lookup(test.id, test.tpe, nil)
if len(list) != 1 {
t.Errorf("expected one result for blob %v, got %v: %v", test.id.Str(), len(list), list)
}
blob := list[0]
t.Logf("looking for blob %v/%v, got %v", test.tpe, test.id.Str(), blob)
rtest.Equals(t, test.packID, blob.PackID)
rtest.Equals(t, test.tpe, blob.Type)
rtest.Equals(t, test.offset, blob.Offset)
rtest.Equals(t, test.length, blob.Length)
}
rtest.Equals(t, oldIdx, idx.Supersedes())
blobs := idx.ListPack(exampleLookupTest.packID)
if len(blobs) != len(exampleLookupTest.blobs) {
t.Fatalf("expected %d blobs in pack, got %d", len(exampleLookupTest.blobs), len(blobs))
}
for _, blob := range blobs {
b, ok := exampleLookupTest.blobs[blob.ID]
if !ok {
t.Errorf("unexpected blob %v found", blob.ID.Str())
}
if blob.Type != b {
t.Errorf("unexpected type for blob %v: want %v, got %v", blob.ID.Str(), b, blob.Type)
}
}
}
var (
benchmarkIndexJSON []byte
benchmarkIndexJSONOnce sync.Once
)
func initBenchmarkIndexJSON() {
idx, _ := createRandomIndex(rand.New(rand.NewSource(0)), 200000)
var buf bytes.Buffer
idx.Encode(&buf)
benchmarkIndexJSON = buf.Bytes()
}
func BenchmarkDecodeIndex(b *testing.B) {
benchmarkIndexJSONOnce.Do(initBenchmarkIndexJSON)
id := restic.NewRandomID()
b.ResetTimer()
for i := 0; i < b.N; i++ {
_, _, err := repository.DecodeIndex(benchmarkIndexJSON, id)
rtest.OK(b, err)
}
}
func BenchmarkDecodeIndexParallel(b *testing.B) {
benchmarkIndexJSONOnce.Do(initBenchmarkIndexJSON)
id := restic.NewRandomID()
b.ResetTimer()
b.RunParallel(func(pb *testing.PB) {
for pb.Next() {
_, _, err := repository.DecodeIndex(benchmarkIndexJSON, id)
rtest.OK(b, err)
}
})
}
func TestIndexUnserializeOld(t *testing.T) {
idx, oldFormat, err := repository.DecodeIndex(docOldExample, restic.NewRandomID())
rtest.OK(t, err)
rtest.Assert(t, oldFormat, "old index format recognized as new format")
for _, test := range exampleTests {
list := idx.Lookup(test.id, test.tpe, nil)
if len(list) != 1 {
t.Errorf("expected one result for blob %v, got %v: %v", test.id.Str(), len(list), list)
}
blob := list[0]
rtest.Equals(t, test.packID, blob.PackID)
rtest.Equals(t, test.tpe, blob.Type)
rtest.Equals(t, test.offset, blob.Offset)
rtest.Equals(t, test.length, blob.Length)
}
rtest.Equals(t, 0, len(idx.Supersedes()))
}
func TestIndexPacks(t *testing.T) {
idx := repository.NewIndex()
packs := restic.NewIDSet()
for i := 0; i < 20; i++ {
packID := restic.NewRandomID()
idx.Store(restic.PackedBlob{
Blob: restic.Blob{
Type: restic.DataBlob,
ID: restic.NewRandomID(),
Offset: 0,
Length: 23,
},
PackID: packID,
})
packs.Insert(packID)
}
idxPacks := idx.Packs()
rtest.Assert(t, packs.Equals(idxPacks), "packs in index do not match packs added to index")
}
const maxPackSize = 16 * 1024 * 1024
// This function generates a (insecure) random ID, similar to NewRandomID
func NewRandomTestID(rng *rand.Rand) restic.ID {
id := restic.ID{}
rng.Read(id[:])
return id
}
func createRandomIndex(rng *rand.Rand, packfiles int) (idx *repository.Index, lookupID restic.ID) {
idx = repository.NewIndex()
// create index with given number of pack files
for i := 0; i < packfiles; i++ {
packID := NewRandomTestID(rng)
var blobs []restic.Blob
offset := 0
for offset < maxPackSize {
size := 2000 + rng.Intn(4*1024*1024)
id := NewRandomTestID(rng)
blobs = append(blobs, restic.Blob{
Type: restic.DataBlob,
ID: id,
Length: uint(size),
Offset: uint(offset),
})
offset += size
}
idx.StorePack(packID, blobs)
if i == 0 {
lookupID = blobs[rng.Intn(len(blobs))].ID
}
}
return idx, lookupID
}
func BenchmarkIndexHasUnknown(b *testing.B) {
idx, _ := createRandomIndex(rand.New(rand.NewSource(0)), 200000)
lookupID := restic.NewRandomID()
b.ResetTimer()
for i := 0; i < b.N; i++ {
idx.Has(lookupID, restic.DataBlob)
}
}
func BenchmarkIndexHasKnown(b *testing.B) {
idx, lookupID := createRandomIndex(rand.New(rand.NewSource(0)), 200000)
b.ResetTimer()
for i := 0; i < b.N; i++ {
idx.Has(lookupID, restic.DataBlob)
}
}
func BenchmarkIndexAlloc(b *testing.B) {
rng := rand.New(rand.NewSource(0))
b.ReportAllocs()
for i := 0; i < b.N; i++ {
createRandomIndex(rng, 200000)
}
}
func BenchmarkIndexAllocParallel(b *testing.B) {
b.ReportAllocs()
b.RunParallel(func(pb *testing.PB) {
rng := rand.New(rand.NewSource(0))
for pb.Next() {
createRandomIndex(rng, 200000)
}
})
}
func TestIndexHas(t *testing.T) {
type testEntry struct {
id restic.ID
pack restic.ID
tpe restic.BlobType
offset, length uint
}
tests := []testEntry{}
idx := repository.NewIndex()
// create 50 packs with 20 blobs each
for i := 0; i < 50; i++ {
packID := restic.NewRandomID()
pos := uint(0)
for j := 0; j < 20; j++ {
id := restic.NewRandomID()
length := uint(i*100 + j)
idx.Store(restic.PackedBlob{
Blob: restic.Blob{
Type: restic.DataBlob,
ID: id,
Offset: pos,
Length: length,
},
PackID: packID,
})
tests = append(tests, testEntry{
id: id,
pack: packID,
tpe: restic.DataBlob,
offset: pos,
length: length,
})
pos += length
}
}
for _, testBlob := range tests {
rtest.Assert(t, idx.Has(testBlob.id, testBlob.tpe), "Index reports not having data blob added to it")
}
rtest.Assert(t, !idx.Has(restic.NewRandomID(), restic.DataBlob), "Index reports having a data blob not added to it")
rtest.Assert(t, !idx.Has(tests[0].id, restic.TreeBlob), "Index reports having a tree blob added to it with the same id as a data blob")
}