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repository: Test compressed blobs in StreamPack
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parent
bcab548617
commit
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@ -15,6 +15,7 @@ import (
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"time"
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"github.com/google/go-cmp/cmp"
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"github.com/klauspost/compress/zstd"
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"github.com/restic/restic/internal/archiver"
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"github.com/restic/restic/internal/crypto"
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"github.com/restic/restic/internal/repository"
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@ -461,10 +462,31 @@ func testRepositoryIncrementalIndex(t *testing.T, version uint) {
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}
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// buildPackfileWithoutHeader returns a manually built pack file without a header.
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func buildPackfileWithoutHeader(t testing.TB, blobSizes []int, key *crypto.Key) (blobs []restic.Blob, packfile []byte) {
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func buildPackfileWithoutHeader(t testing.TB, blobSizes []int, key *crypto.Key, compress bool) (blobs []restic.Blob, packfile []byte) {
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opts := []zstd.EOption{
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// Set the compression level configured.
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zstd.WithEncoderLevel(zstd.SpeedDefault),
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// Disable CRC, we have enough checks in place, makes the
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// compressed data four bytes shorter.
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zstd.WithEncoderCRC(false),
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// Set a window of 512kbyte, so we have good lookbehind for usual
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// blob sizes.
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zstd.WithWindowSize(512 * 1024),
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}
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enc, err := zstd.NewWriter(nil, opts...)
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if err != nil {
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panic(err)
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}
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var offset uint
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for i, size := range blobSizes {
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plaintext := test.Random(800+i, size)
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id := restic.Hash(plaintext)
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uncompressedLength := uint(0)
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if compress {
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uncompressedLength = uint(len(plaintext))
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plaintext = enc.EncodeAll(plaintext, nil)
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}
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// we use a deterministic nonce here so the whole process is
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// deterministic, last byte is the blob index
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@ -482,11 +504,12 @@ func buildPackfileWithoutHeader(t testing.TB, blobSizes []int, key *crypto.Key)
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blobs = append(blobs, restic.Blob{
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BlobHandle: restic.BlobHandle{
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ID: restic.Hash(plaintext),
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Type: restic.DataBlob,
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ID: id,
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},
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Length: uint(ciphertextLength),
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Offset: offset,
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Length: uint(ciphertextLength),
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UncompressedLength: uncompressedLength,
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Offset: offset,
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})
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offset = uint(len(packfile))
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@ -496,6 +519,10 @@ func buildPackfileWithoutHeader(t testing.TB, blobSizes []int, key *crypto.Key)
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}
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func TestStreamPack(t *testing.T) {
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repository.TestAllVersions(t, testStreamPack)
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}
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func testStreamPack(t *testing.T, version uint) {
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// always use the same key for deterministic output
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const jsonKey = `{"mac":{"k":"eQenuI8adktfzZMuC8rwdA==","r":"k8cfAly2qQSky48CQK7SBA=="},"encrypt":"MKO9gZnRiQFl8mDUurSDa9NMjiu9MUifUrODTHS05wo="}`
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@ -520,7 +547,17 @@ func TestStreamPack(t *testing.T) {
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18883,
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}
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packfileBlobs, packfile := buildPackfileWithoutHeader(t, blobSizes, &key)
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var compress bool
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switch version {
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case 1:
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compress = false
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case 2:
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compress = true
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default:
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t.Fatal("test does not suport repository version", version)
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}
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packfileBlobs, packfile := buildPackfileWithoutHeader(t, blobSizes, &key, compress)
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load := func(ctx context.Context, h restic.Handle, length int, offset int64, fn func(rd io.Reader) error) error {
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data := packfile
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