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") }