716 lines
17 KiB
Go
716 lines
17 KiB
Go
package test
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import (
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"bytes"
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"context"
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"fmt"
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"io"
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"io/ioutil"
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"math/rand"
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"os"
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"reflect"
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"sort"
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"strings"
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"sync"
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"testing"
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"time"
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"github.com/restic/restic/internal/errors"
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"github.com/restic/restic/internal/restic"
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"github.com/restic/restic/internal/test"
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"github.com/restic/restic/internal/backend"
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)
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func seedRand(t testing.TB) {
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seed := time.Now().UnixNano()
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rand.Seed(seed)
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t.Logf("rand initialized with seed %d", seed)
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}
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// TestCreateWithConfig tests that creating a backend in a location which already
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// has a config file fails.
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func (s *Suite) TestCreateWithConfig(t *testing.T) {
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b := s.open(t)
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defer s.close(t, b)
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// remove a config if present
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cfgHandle := restic.Handle{Type: restic.ConfigFile}
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cfgPresent, err := b.Test(context.TODO(), cfgHandle)
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if err != nil {
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t.Fatalf("unable to test for config: %+v", err)
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}
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if cfgPresent {
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remove(t, b, cfgHandle)
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}
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// save a config
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store(t, b, restic.ConfigFile, []byte("test config"))
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// now create the backend again, this must fail
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_, err = s.Create(s.Config)
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if err == nil {
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t.Fatalf("expected error not found for creating a backend with an existing config file")
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}
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// remove config
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err = b.Remove(context.TODO(), restic.Handle{Type: restic.ConfigFile, Name: ""})
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if err != nil {
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t.Fatalf("unexpected error removing config: %+v", err)
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}
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}
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// TestLocation tests that a location string is returned.
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func (s *Suite) TestLocation(t *testing.T) {
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b := s.open(t)
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defer s.close(t, b)
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l := b.Location()
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if l == "" {
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t.Fatalf("invalid location string %q", l)
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}
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}
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// TestConfig saves and loads a config from the backend.
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func (s *Suite) TestConfig(t *testing.T) {
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b := s.open(t)
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defer s.close(t, b)
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var testString = "Config"
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// create config and read it back
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_, err := backend.LoadAll(context.TODO(), b, restic.Handle{Type: restic.ConfigFile})
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if err == nil {
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t.Fatalf("did not get expected error for non-existing config")
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}
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err = b.Save(context.TODO(), restic.Handle{Type: restic.ConfigFile}, strings.NewReader(testString))
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if err != nil {
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t.Fatalf("Save() error: %+v", err)
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}
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// try accessing the config with different names, should all return the
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// same config
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for _, name := range []string{"", "foo", "bar", "0000000000000000000000000000000000000000000000000000000000000000"} {
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h := restic.Handle{Type: restic.ConfigFile, Name: name}
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buf, err := backend.LoadAll(context.TODO(), b, h)
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if err != nil {
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t.Fatalf("unable to read config with name %q: %+v", name, err)
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}
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if string(buf) != testString {
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t.Fatalf("wrong data returned, want %q, got %q", testString, string(buf))
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}
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}
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// remove the config
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remove(t, b, restic.Handle{Type: restic.ConfigFile})
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}
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// TestLoad tests the backend's Load function.
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func (s *Suite) TestLoad(t *testing.T) {
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seedRand(t)
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b := s.open(t)
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defer s.close(t, b)
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rd, err := b.Load(context.TODO(), restic.Handle{}, 0, 0)
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if err == nil {
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t.Fatalf("Load() did not return an error for invalid handle")
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}
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if rd != nil {
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_ = rd.Close()
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}
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err = testLoad(b, restic.Handle{Type: restic.DataFile, Name: "foobar"}, 0, 0)
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if err == nil {
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t.Fatalf("Load() did not return an error for non-existing blob")
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}
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length := rand.Intn(1<<24) + 2000
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data := test.Random(23, length)
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id := restic.Hash(data)
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handle := restic.Handle{Type: restic.DataFile, Name: id.String()}
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err = b.Save(context.TODO(), handle, bytes.NewReader(data))
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if err != nil {
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t.Fatalf("Save() error: %+v", err)
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}
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t.Logf("saved %d bytes as %v", length, handle)
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rd, err = b.Load(context.TODO(), handle, 100, -1)
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if err == nil {
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t.Fatalf("Load() returned no error for negative offset!")
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}
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if rd != nil {
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t.Fatalf("Load() returned a non-nil reader for negative offset!")
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}
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loadTests := 50
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if s.MinimalData {
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loadTests = 10
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}
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for i := 0; i < loadTests; i++ {
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l := rand.Intn(length + 2000)
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o := rand.Intn(length + 2000)
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d := data
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if o < len(d) {
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d = d[o:]
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} else {
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t.Logf("offset == length, skipping test")
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continue
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}
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getlen := l
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if l >= len(d) && rand.Float32() >= 0.5 {
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getlen = 0
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}
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if l > 0 && l < len(d) {
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d = d[:l]
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}
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rd, err := b.Load(context.TODO(), handle, getlen, int64(o))
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if err != nil {
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t.Logf("Load, l %v, o %v, len(d) %v, getlen %v", l, o, len(d), getlen)
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t.Errorf("Load(%d, %d) returned unexpected error: %+v", l, o, err)
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continue
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}
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buf, err := ioutil.ReadAll(rd)
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if err != nil {
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t.Logf("Load, l %v, o %v, len(d) %v, getlen %v", l, o, len(d), getlen)
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t.Errorf("Load(%d, %d) ReadAll() returned unexpected error: %+v", l, o, err)
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if err = rd.Close(); err != nil {
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t.Errorf("Load(%d, %d) rd.Close() returned error: %+v", l, o, err)
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}
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continue
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}
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if l == 0 && len(buf) != len(d) {
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t.Logf("Load, l %v, o %v, len(d) %v, getlen %v", l, o, len(d), getlen)
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t.Errorf("Load(%d, %d) wrong number of bytes read: want %d, got %d", l, o, len(d), len(buf))
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if err = rd.Close(); err != nil {
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t.Errorf("Load(%d, %d) rd.Close() returned error: %+v", l, o, err)
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}
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continue
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}
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if l > 0 && l <= len(d) && len(buf) != l {
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t.Logf("Load, l %v, o %v, len(d) %v, getlen %v", l, o, len(d), getlen)
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t.Errorf("Load(%d, %d) wrong number of bytes read: want %d, got %d", l, o, l, len(buf))
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if err = rd.Close(); err != nil {
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t.Errorf("Load(%d, %d) rd.Close() returned error: %+v", l, o, err)
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}
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continue
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}
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if l > len(d) && len(buf) != len(d) {
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t.Logf("Load, l %v, o %v, len(d) %v, getlen %v", l, o, len(d), getlen)
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t.Errorf("Load(%d, %d) wrong number of bytes read for overlong read: want %d, got %d", l, o, l, len(buf))
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if err = rd.Close(); err != nil {
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t.Errorf("Load(%d, %d) rd.Close() returned error: %+v", l, o, err)
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}
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continue
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}
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if !bytes.Equal(buf, d) {
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t.Logf("Load, l %v, o %v, len(d) %v, getlen %v", l, o, len(d), getlen)
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t.Errorf("Load(%d, %d) returned wrong bytes", l, o)
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if err = rd.Close(); err != nil {
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t.Errorf("Load(%d, %d) rd.Close() returned error: %+v", l, o, err)
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}
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continue
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}
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err = rd.Close()
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if err != nil {
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t.Logf("Load, l %v, o %v, len(d) %v, getlen %v", l, o, len(d), getlen)
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t.Errorf("Load(%d, %d) rd.Close() returned unexpected error: %+v", l, o, err)
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continue
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}
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}
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test.OK(t, b.Remove(context.TODO(), handle))
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}
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// TestList makes sure that the backend can list more than a thousand files.
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func (s *Suite) TestList(t *testing.T) {
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seedRand(t)
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b := s.open(t)
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defer s.close(t, b)
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const numTestFiles = 1233
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list1 := restic.NewIDSet()
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var wg sync.WaitGroup
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input := make(chan int, numTestFiles)
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for i := 0; i < numTestFiles; i++ {
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input <- i
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}
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close(input)
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output := make(chan restic.ID, numTestFiles)
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for worker := 0; worker < 5; worker++ {
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wg.Add(1)
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go func() {
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defer wg.Done()
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for i := range input {
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data := []byte(fmt.Sprintf("random test blob %v", i))
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id := restic.Hash(data)
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h := restic.Handle{Type: restic.DataFile, Name: id.String()}
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err := b.Save(context.TODO(), h, bytes.NewReader(data))
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if err != nil {
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t.Fatal(err)
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}
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output <- id
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}
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}()
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}
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wg.Wait()
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close(output)
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for id := range output {
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list1.Insert(id)
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}
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t.Logf("wrote %v files", len(list1))
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list2 := restic.NewIDSet()
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for name := range b.List(context.TODO(), restic.DataFile) {
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id, err := restic.ParseID(name)
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if err != nil {
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t.Fatal(err)
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}
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list2.Insert(id)
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}
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t.Logf("loaded %v IDs from backend", len(list2))
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if !list1.Equals(list2) {
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t.Errorf("lists are not equal, list1 %d entries, list2 %d entries", len(list1), len(list2))
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}
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for id := range list1 {
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h := restic.Handle{Type: restic.DataFile, Name: id.String()}
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err := s.delayedRemove(t, b, h)
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if err != nil {
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t.Fatal(err)
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}
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}
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}
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type errorCloser struct {
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io.Reader
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l int
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t testing.TB
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}
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func (ec errorCloser) Close() error {
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ec.t.Error("forbidden method close was called")
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return errors.New("forbidden method close was called")
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}
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func (ec errorCloser) Len() int {
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return ec.l
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}
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// TestSave tests saving data in the backend.
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func (s *Suite) TestSave(t *testing.T) {
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seedRand(t)
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b := s.open(t)
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defer s.close(t, b)
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var id restic.ID
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saveTests := 10
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if s.MinimalData {
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saveTests = 2
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}
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for i := 0; i < saveTests; i++ {
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length := rand.Intn(1<<23) + 200000
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data := test.Random(23, length)
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// use the first 32 byte as the ID
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copy(id[:], data)
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h := restic.Handle{
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Type: restic.DataFile,
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Name: fmt.Sprintf("%s-%d", id, i),
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}
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err := b.Save(context.TODO(), h, bytes.NewReader(data))
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test.OK(t, err)
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buf, err := backend.LoadAll(context.TODO(), b, h)
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test.OK(t, err)
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if len(buf) != len(data) {
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t.Fatalf("number of bytes does not match, want %v, got %v", len(data), len(buf))
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}
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if !bytes.Equal(buf, data) {
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t.Fatalf("data not equal")
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}
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fi, err := b.Stat(context.TODO(), h)
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test.OK(t, err)
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if fi.Size != int64(len(data)) {
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t.Fatalf("Stat() returned different size, want %q, got %d", len(data), fi.Size)
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}
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err = b.Remove(context.TODO(), h)
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if err != nil {
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t.Fatalf("error removing item: %+v", err)
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}
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}
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// test saving from a tempfile
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tmpfile, err := ioutil.TempFile("", "restic-backend-save-test-")
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if err != nil {
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t.Fatal(err)
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}
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length := rand.Intn(1<<23) + 200000
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data := test.Random(23, length)
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copy(id[:], data)
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if _, err = tmpfile.Write(data); err != nil {
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t.Fatal(err)
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}
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if _, err = tmpfile.Seek(0, io.SeekStart); err != nil {
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t.Fatal(err)
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}
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h := restic.Handle{Type: restic.DataFile, Name: id.String()}
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// wrap the tempfile in an errorCloser, so we can detect if the backend
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// closes the reader
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err = b.Save(context.TODO(), h, errorCloser{t: t, l: length, Reader: tmpfile})
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if err != nil {
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t.Fatal(err)
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}
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err = s.delayedRemove(t, b, h)
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if err != nil {
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t.Fatalf("error removing item: %+v", err)
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}
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// try again directly with the temp file
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if _, err = tmpfile.Seek(588, io.SeekStart); err != nil {
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t.Fatal(err)
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}
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err = b.Save(context.TODO(), h, tmpfile)
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if err != nil {
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t.Fatal(err)
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}
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if err = tmpfile.Close(); err != nil {
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t.Fatal(err)
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}
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err = b.Remove(context.TODO(), h)
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if err != nil {
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t.Fatalf("error removing item: %+v", err)
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}
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if err = os.Remove(tmpfile.Name()); err != nil {
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t.Fatal(err)
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}
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}
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var filenameTests = []struct {
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name string
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data string
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}{
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{"1dfc6bc0f06cb255889e9ea7860a5753e8eb9665c9a96627971171b444e3113e", "x"},
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{"f00b4r", "foobar"},
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{
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"1dfc6bc0f06cb255889e9ea7860a5753e8eb9665c9a96627971171b444e3113e4bf8f2d9144cc5420a80f04a4880ad6155fc58903a4fb6457c476c43541dcaa6-5",
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"foobar content of data blob",
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},
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}
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// TestSaveFilenames tests saving data with various file names in the backend.
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func (s *Suite) TestSaveFilenames(t *testing.T) {
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b := s.open(t)
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defer s.close(t, b)
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for i, test := range filenameTests {
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h := restic.Handle{Name: test.name, Type: restic.DataFile}
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err := b.Save(context.TODO(), h, strings.NewReader(test.data))
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if err != nil {
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t.Errorf("test %d failed: Save() returned %+v", i, err)
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continue
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}
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buf, err := backend.LoadAll(context.TODO(), b, h)
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if err != nil {
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t.Errorf("test %d failed: Load() returned %+v", i, err)
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continue
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}
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if !bytes.Equal(buf, []byte(test.data)) {
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t.Errorf("test %d: returned wrong bytes", i)
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}
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err = b.Remove(context.TODO(), h)
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if err != nil {
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t.Errorf("test %d failed: Remove() returned %+v", i, err)
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continue
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}
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}
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}
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var testStrings = []struct {
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id string
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data string
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}{
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{"c3ab8ff13720e8ad9047dd39466b3c8974e592c2fa383d4a3960714caef0c4f2", "foobar"},
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{"248d6a61d20638b8e5c026930c3e6039a33ce45964ff2167f6ecedd419db06c1", "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq"},
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{"cc5d46bdb4991c6eae3eb739c9c8a7a46fe9654fab79c47b4fe48383b5b25e1c", "foo/bar"},
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{"4e54d2c721cbdb730f01b10b62dec622962b36966ec685880effa63d71c808f2", "foo/../../baz"},
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}
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func store(t testing.TB, b restic.Backend, tpe restic.FileType, data []byte) restic.Handle {
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id := restic.Hash(data)
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h := restic.Handle{Name: id.String(), Type: tpe}
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err := b.Save(context.TODO(), h, bytes.NewReader(data))
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test.OK(t, err)
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return h
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}
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// testLoad loads a blob (but discards its contents).
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func testLoad(b restic.Backend, h restic.Handle, length int, offset int64) error {
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rd, err := b.Load(context.TODO(), h, 0, 0)
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if err != nil {
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return err
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}
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_, err = io.Copy(ioutil.Discard, rd)
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cerr := rd.Close()
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if err == nil {
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err = cerr
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}
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return err
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}
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func (s *Suite) delayedRemove(t testing.TB, be restic.Backend, handles ...restic.Handle) error {
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// Some backend (swift, I'm looking at you) may implement delayed
|
|
// removal of data. Let's wait a bit if this happens.
|
|
|
|
for _, h := range handles {
|
|
err := be.Remove(context.TODO(), h)
|
|
if s.ErrorHandler != nil {
|
|
err = s.ErrorHandler(t, be, err)
|
|
}
|
|
if err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
for _, h := range handles {
|
|
start := time.Now()
|
|
attempt := 0
|
|
var found bool
|
|
var err error
|
|
for time.Since(start) <= s.WaitForDelayedRemoval {
|
|
found, err = be.Test(context.TODO(), h)
|
|
if s.ErrorHandler != nil {
|
|
err = s.ErrorHandler(t, be, err)
|
|
}
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if !found {
|
|
break
|
|
}
|
|
|
|
time.Sleep(2 * time.Second)
|
|
attempt++
|
|
}
|
|
|
|
if found {
|
|
t.Fatalf("removed blob %v still present after %v (%d attempts)", h, time.Since(start), attempt)
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func delayedList(t testing.TB, b restic.Backend, tpe restic.FileType, max int, maxwait time.Duration) restic.IDs {
|
|
list := restic.NewIDSet()
|
|
start := time.Now()
|
|
for i := 0; i < max; i++ {
|
|
for s := range b.List(context.TODO(), tpe) {
|
|
id := restic.TestParseID(s)
|
|
list.Insert(id)
|
|
}
|
|
if len(list) < max && time.Since(start) < maxwait {
|
|
time.Sleep(500 * time.Millisecond)
|
|
}
|
|
}
|
|
|
|
return list.List()
|
|
}
|
|
|
|
// TestBackend tests all functions of the backend.
|
|
func (s *Suite) TestBackend(t *testing.T) {
|
|
b := s.open(t)
|
|
defer s.close(t, b)
|
|
|
|
for _, tpe := range []restic.FileType{
|
|
restic.DataFile, restic.KeyFile, restic.LockFile,
|
|
restic.SnapshotFile, restic.IndexFile,
|
|
} {
|
|
// detect non-existing files
|
|
for _, ts := range testStrings {
|
|
id, err := restic.ParseID(ts.id)
|
|
test.OK(t, err)
|
|
|
|
// test if blob is already in repository
|
|
h := restic.Handle{Type: tpe, Name: id.String()}
|
|
ret, err := b.Test(context.TODO(), h)
|
|
test.OK(t, err)
|
|
test.Assert(t, !ret, "blob was found to exist before creating")
|
|
|
|
// try to stat a not existing blob
|
|
_, err = b.Stat(context.TODO(), h)
|
|
test.Assert(t, err != nil, "blob data could be extracted before creation")
|
|
|
|
// try to read not existing blob
|
|
err = testLoad(b, h, 0, 0)
|
|
test.Assert(t, err != nil, "blob could be read before creation")
|
|
|
|
// try to get string out, should fail
|
|
ret, err = b.Test(context.TODO(), h)
|
|
test.OK(t, err)
|
|
test.Assert(t, !ret, "id %q was found (but should not have)", ts.id)
|
|
}
|
|
|
|
// add files
|
|
for _, ts := range testStrings {
|
|
store(t, b, tpe, []byte(ts.data))
|
|
|
|
// test Load()
|
|
h := restic.Handle{Type: tpe, Name: ts.id}
|
|
buf, err := backend.LoadAll(context.TODO(), b, h)
|
|
test.OK(t, err)
|
|
test.Equals(t, ts.data, string(buf))
|
|
|
|
// try to read it out with an offset and a length
|
|
start := 1
|
|
end := len(ts.data) - 2
|
|
length := end - start
|
|
|
|
buf2 := make([]byte, length)
|
|
rd, err := b.Load(context.TODO(), h, len(buf2), int64(start))
|
|
test.OK(t, err)
|
|
n, err := io.ReadFull(rd, buf2)
|
|
test.OK(t, err)
|
|
test.Equals(t, len(buf2), n)
|
|
|
|
remaining, err := io.Copy(ioutil.Discard, rd)
|
|
test.OK(t, err)
|
|
test.Equals(t, int64(0), remaining)
|
|
|
|
test.OK(t, rd.Close())
|
|
|
|
test.Equals(t, ts.data[start:end], string(buf2))
|
|
}
|
|
|
|
// test adding the first file again
|
|
ts := testStrings[0]
|
|
|
|
// create blob
|
|
h := restic.Handle{Type: tpe, Name: ts.id}
|
|
err := b.Save(context.TODO(), h, strings.NewReader(ts.data))
|
|
test.Assert(t, err != nil, "expected error for %v, got %v", h, err)
|
|
|
|
// remove and recreate
|
|
err = s.delayedRemove(t, b, h)
|
|
test.OK(t, err)
|
|
|
|
// test that the blob is gone
|
|
ok, err := b.Test(context.TODO(), h)
|
|
test.OK(t, err)
|
|
test.Assert(t, !ok, "removed blob still present")
|
|
|
|
// create blob
|
|
err = b.Save(context.TODO(), h, strings.NewReader(ts.data))
|
|
test.OK(t, err)
|
|
|
|
// list items
|
|
IDs := restic.IDs{}
|
|
|
|
for _, ts := range testStrings {
|
|
id, err := restic.ParseID(ts.id)
|
|
test.OK(t, err)
|
|
IDs = append(IDs, id)
|
|
}
|
|
|
|
list := delayedList(t, b, tpe, len(IDs), s.WaitForDelayedRemoval)
|
|
if len(IDs) != len(list) {
|
|
t.Fatalf("wrong number of IDs returned: want %d, got %d", len(IDs), len(list))
|
|
}
|
|
|
|
sort.Sort(IDs)
|
|
sort.Sort(list)
|
|
|
|
if !reflect.DeepEqual(IDs, list) {
|
|
t.Fatalf("lists aren't equal, want:\n %v\n got:\n%v\n", IDs, list)
|
|
}
|
|
|
|
// remove content if requested
|
|
if test.TestCleanupTempDirs {
|
|
var handles []restic.Handle
|
|
for _, ts := range testStrings {
|
|
id, err := restic.ParseID(ts.id)
|
|
test.OK(t, err)
|
|
|
|
h := restic.Handle{Type: tpe, Name: id.String()}
|
|
|
|
found, err := b.Test(context.TODO(), h)
|
|
test.OK(t, err)
|
|
test.Assert(t, found, fmt.Sprintf("id %q not found", id))
|
|
|
|
handles = append(handles, h)
|
|
}
|
|
|
|
test.OK(t, s.delayedRemove(t, b, handles...))
|
|
}
|
|
}
|
|
}
|
|
|
|
// TestDelete tests the Delete function.
|
|
func (s *Suite) TestDelete(t *testing.T) {
|
|
if !test.TestCleanupTempDirs {
|
|
t.Skipf("not removing backend, TestCleanupTempDirs is false")
|
|
}
|
|
|
|
b := s.open(t)
|
|
defer s.close(t, b)
|
|
|
|
be, ok := b.(restic.Deleter)
|
|
if !ok {
|
|
return
|
|
}
|
|
|
|
err := be.Delete(context.TODO())
|
|
if err != nil {
|
|
t.Fatalf("error deleting backend: %+v", err)
|
|
}
|
|
}
|