package repository import ( "context" "testing" "github.com/restic/restic/internal/backend/mem" "github.com/restic/restic/internal/restic" "golang.org/x/sync/errgroup" ) // Test saving a blob and loading it again, with varying buffer sizes. // Also a regression test for #3783. func FuzzSaveLoadBlob(f *testing.F) { f.Fuzz(func(t *testing.T, blob []byte, buflen uint) { if buflen > 64<<20 { // Don't allocate enormous buffers. We're not testing the allocator. t.Skip() } id := restic.Hash(blob) repo := TestRepositoryWithBackend(t, mem.New(), 2) var wg errgroup.Group repo.StartPackUploader(context.TODO(), &wg) _, _, _, err := repo.SaveBlob(context.TODO(), restic.DataBlob, blob, id, false) if err != nil { t.Fatal(err) } err = repo.Flush(context.TODO()) if err != nil { t.Fatal(err) } buf, err := repo.LoadBlob(context.TODO(), restic.DataBlob, id, make([]byte, buflen)) if err != nil { t.Fatal(err) } if restic.Hash(buf) != id { t.Fatal("mismatch") } }) }