Add LoadAll()

This commit is contained in:
Alexander Neumann 2016-01-23 23:41:55 +01:00
parent 919b40c6cf
commit 9209dcfa26
2 changed files with 62 additions and 0 deletions

18
backend/utils.go Normal file
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package backend
// LoadAll reads all data stored in the backend for the handle. The buffer buf
// is resized to accomodate all data in the blob.
func LoadAll(be Backend, h Handle, buf []byte) ([]byte, error) {
fi, err := be.Stat(h)
if err != nil {
return nil, err
}
if fi.Size > int64(len(buf)) {
buf = make([]byte, int(fi.Size))
}
n, err := be.Load(h, buf, 0)
buf = buf[:n]
return buf, err
}

44
backend/utils_test.go Normal file
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package backend_test
import (
"bytes"
"math/rand"
"testing"
"github.com/restic/restic/backend"
"github.com/restic/restic/backend/mem"
. "github.com/restic/restic/test"
)
const KiB = 1 << 10
const MiB = 1 << 20
func TestLoadAll(t *testing.T) {
b := mem.New()
for i := 0; i < 20; i++ {
data := Random(23+i, rand.Intn(MiB)+500*KiB)
id := backend.Hash(data)
blob, err := b.Create()
OK(t, err)
_, err = blob.Write([]byte(data))
OK(t, err)
OK(t, blob.Finalize(backend.Data, id.String()))
buf, err := backend.LoadAll(b, backend.Handle{Type: backend.Data, Name: id.String()}, nil)
OK(t, err)
if len(buf) != len(data) {
t.Errorf("length of returned buffer does not match, want %d, got %d", len(data), len(buf))
continue
}
if !bytes.Equal(buf, data) {
t.Errorf("wrong data returned")
continue
}
}
}