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repository: test LoadBlob retries

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This commit is contained in:
Michael Eischer 2024-05-09 21:22:19 +02:00
parent 4f45668b7c
commit bf16096771
1 changed files with 26 additions and 5 deletions
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31
internal/repository/repository_test.go
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@ -15,11 +15,14 @@ import (
"github.com/restic/restic/internal/backend"
"github.com/restic/restic/internal/backend/local"
"github.com/restic/restic/internal/backend/mem"
"github.com/restic/restic/internal/cache"
"github.com/restic/restic/internal/crypto"
"github.com/restic/restic/internal/errors"
"github.com/restic/restic/internal/index"
"github.com/restic/restic/internal/repository"
"github.com/restic/restic/internal/restic"
"github.com/restic/restic/internal/test"
rtest "github.com/restic/restic/internal/test"
"golang.org/x/sync/errgroup"
)
@ -140,6 +143,28 @@ func testLoadBlob(t *testing.T, version uint) {
}
}
func TestLoadBlobBroken(t *testing.T) {
be := mem.New()
repo := repository.TestRepositoryWithBackend(t, &damageOnceBackend{Backend: be}, restic.StableRepoVersion, repository.Options{}).(*repository.Repository)
buf := test.Random(42, 1000)
var wg errgroup.Group
repo.StartPackUploader(context.TODO(), &wg)
id, _, _, err := repo.SaveBlob(context.TODO(), restic.TreeBlob, buf, restic.ID{}, false)
rtest.OK(t, err)
rtest.OK(t, repo.Flush(context.Background()))
// setup cache after saving the blob to make sure that the damageOnceBackend damages the cached data
c := cache.TestNewCache(t)
repo.UseCache(c)
data, err := repo.LoadBlob(context.TODO(), restic.TreeBlob, id, nil)
rtest.OK(t, err)
rtest.Assert(t, bytes.Equal(buf, data), "data mismatch")
pack := repo.Index().Lookup(restic.BlobHandle{Type: restic.TreeBlob, ID: id})[0].PackID
rtest.Assert(t, c.Has(backend.Handle{Type: restic.PackFile, Name: pack.String()}), "expected tree pack to be cached")
}
func BenchmarkLoadBlob(b *testing.B) {
repository.BenchmarkAllVersions(b, benchmarkLoadBlob)
}
@ -255,11 +280,7 @@ func TestRepositoryLoadUnpackedBroken(t *testing.T) {
err := repo.Backend().Save(context.TODO(), h, backend.NewByteReader(data, repo.Backend().Hasher()))
rtest.OK(t, err)
// without a retry backend this will just return an error that the file is broken
_, err = repo.LoadUnpacked(context.TODO(), restic.IndexFile, id)
if err == nil {
t.Fatal("missing expected error")
}
rtest.Assert(t, errors.Is(err, restic.ErrInvalidData), "unexpected error: %v", err)
}
@ -277,7 +298,7 @@ func (be *damageOnceBackend) Load(ctx context.Context, h backend.Handle, length
_, retry := be.m.Swap(h, true)
if !retry {
// return broken data on the first try
length++
offset++
}
return be.Backend.Load(ctx, h, length, offset, fn)
}