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restic/internal/archiver/file_saver_test.go
Michael Eischer b4de902596 archiver: Asynchronously complete FutureFile
After reading and chunking all data in a file, the FutureFile still has
to wait until the FutureBlobs are completed. This was done synchronously
which results in blocking the file saver and prevents the next file from
being read.

By replacing the FutureBlob with a callback, it becomes possible to
complete the FutureFile asynchronously.
2022-10-30 10:29:11 +01:00

99 lines
2.1 KiB
Go

package archiver
import (
"context"
"fmt"
"io/ioutil"
"os"
"path/filepath"
"runtime"
"testing"
"github.com/restic/chunker"
"github.com/restic/restic/internal/fs"
"github.com/restic/restic/internal/restic"
"github.com/restic/restic/internal/test"
"golang.org/x/sync/errgroup"
)
func createTestFiles(t testing.TB, num int) (files []string, cleanup func()) {
tempdir, cleanup := test.TempDir(t)
for i := 0; i < 15; i++ {
filename := fmt.Sprintf("testfile-%d", i)
err := ioutil.WriteFile(filepath.Join(tempdir, filename), []byte(filename), 0600)
if err != nil {
t.Fatal(err)
}
files = append(files, filepath.Join(tempdir, filename))
}
return files, cleanup
}
func startFileSaver(ctx context.Context, t testing.TB) (*FileSaver, context.Context, *errgroup.Group) {
wg, ctx := errgroup.WithContext(ctx)
saveBlob := func(ctx context.Context, tpe restic.BlobType, buf *Buffer, cb func(SaveBlobResponse)) {
cb(SaveBlobResponse{})
}
workers := uint(runtime.NumCPU())
pol, err := chunker.RandomPolynomial()
if err != nil {
t.Fatal(err)
}
s := NewFileSaver(ctx, wg, saveBlob, pol, workers, workers)
s.NodeFromFileInfo = func(snPath, filename string, fi os.FileInfo) (*restic.Node, error) {
return restic.NodeFromFileInfo(filename, fi)
}
return s, ctx, wg
}
func TestFileSaver(t *testing.T) {
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
files, cleanup := createTestFiles(t, 15)
defer cleanup()
startFn := func() {}
completeFn := func(*restic.Node, ItemStats) {}
testFs := fs.Local{}
s, ctx, wg := startFileSaver(ctx, t)
var results []FutureNode
for _, filename := range files {
f, err := testFs.Open(filename)
if err != nil {
t.Fatal(err)
}
fi, err := f.Stat()
if err != nil {
t.Fatal(err)
}
ff := s.Save(ctx, filename, filename, f, fi, startFn, completeFn)
results = append(results, ff)
}
for _, file := range results {
fnr := file.take(ctx)
if fnr.err != nil {
t.Errorf("unable to save file: %v", fnr.err)
}
}
s.TriggerShutdown()
err := wg.Wait()
if err != nil {
t.Fatal(err)
}
}