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mirror of https://github.com/octoleo/restic.git synced 2024-11-22 21:05:10 +00:00
restic/internal/archiver/archiver_test.go
Alexander Neumann 581c62ee72 archiver: Improve error handling
This commit changes how the worker goroutines for saving e.g. blobs
interact. Before, it was possible to get stuck sending an instruction to
archive a file or dir when no worker goroutines were available any more.
This commit introduces a `done` channel for each of the worker pools,
which is set to the channel returned by `tomb.Dying()`, so it is closed
when the first worker returned an error.
2018-05-12 23:55:54 +02:00

1601 lines
36 KiB
Go

package archiver
import (
"context"
"io/ioutil"
"os"
"path/filepath"
"runtime"
"strings"
"sync"
"syscall"
"testing"
"time"
"github.com/restic/restic/internal/checker"
"github.com/restic/restic/internal/fs"
"github.com/restic/restic/internal/repository"
"github.com/restic/restic/internal/restic"
restictest "github.com/restic/restic/internal/test"
tomb "gopkg.in/tomb.v2"
)
func prepareTempdirRepoSrc(t testing.TB, src TestDir) (tempdir string, repo restic.Repository, cleanup func()) {
tempdir, removeTempdir := restictest.TempDir(t)
repo, removeRepository := repository.TestRepository(t)
TestCreateFiles(t, tempdir, src)
cleanup = func() {
removeRepository()
removeTempdir()
}
return tempdir, repo, cleanup
}
func saveFile(t testing.TB, repo restic.Repository, filename string, filesystem fs.FS) (*restic.Node, ItemStats) {
var tmb tomb.Tomb
ctx := tmb.Context(context.Background())
arch := New(repo, filesystem, Options{})
arch.runWorkers(ctx, &tmb)
var (
completeCallbackNode *restic.Node
completeCallbackStats ItemStats
completeCallback bool
startCallback bool
)
complete := func(node *restic.Node, stats ItemStats) {
completeCallback = true
completeCallbackNode = node
completeCallbackStats = stats
}
start := func() {
startCallback = true
}
file, err := arch.FS.OpenFile(filename, fs.O_RDONLY|fs.O_NOFOLLOW, 0)
if err != nil {
t.Fatal(err)
}
fi, err := file.Stat()
if err != nil {
t.Fatal(err)
}
res := arch.fileSaver.Save(ctx, "/", file, fi, start, complete)
res.Wait(ctx)
if res.Err() != nil {
t.Fatal(res.Err())
}
tmb.Kill(nil)
err = tmb.Wait()
if err != nil {
t.Fatal(err)
}
err = repo.Flush(ctx)
if err != nil {
t.Fatal(err)
}
err = repo.SaveIndex(ctx)
if err != nil {
t.Fatal(err)
}
if !startCallback {
t.Errorf("start callback did not happen")
}
if !completeCallback {
t.Errorf("complete callback did not happen")
}
if completeCallbackNode == nil {
t.Errorf("no node returned for complete callback")
}
if completeCallbackNode != nil && !res.Node().Equals(*completeCallbackNode) {
t.Errorf("different node returned for complete callback")
}
if completeCallbackStats != res.Stats() {
t.Errorf("different stats return for complete callback, want:\n %v\ngot:\n %v", res.Stats(), completeCallbackStats)
}
return res.Node(), res.Stats()
}
func TestArchiverSaveFile(t *testing.T) {
var tests = []TestFile{
TestFile{Content: ""},
TestFile{Content: "foo"},
TestFile{Content: string(restictest.Random(23, 12*1024*1024+1287898))},
}
for _, testfile := range tests {
t.Run("", func(t *testing.T) {
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
tempdir, repo, cleanup := prepareTempdirRepoSrc(t, TestDir{"file": testfile})
defer cleanup()
node, stats := saveFile(t, repo, filepath.Join(tempdir, "file"), fs.Track{fs.Local{}})
TestEnsureFileContent(ctx, t, repo, "file", node, testfile)
if stats.DataSize != uint64(len(testfile.Content)) {
t.Errorf("wrong stats returned in DataSize, want %d, got %d", len(testfile.Content), stats.DataSize)
}
if stats.DataBlobs <= 0 && len(testfile.Content) > 0 {
t.Errorf("wrong stats returned in DataBlobs, want > 0, got %d", stats.DataBlobs)
}
if stats.TreeSize != 0 {
t.Errorf("wrong stats returned in TreeSize, want 0, got %d", stats.TreeSize)
}
if stats.TreeBlobs != 0 {
t.Errorf("wrong stats returned in DataBlobs, want 0, got %d", stats.DataBlobs)
}
})
}
}
func TestArchiverSaveFileReaderFS(t *testing.T) {
var tests = []struct {
Data string
}{
{Data: ""},
{Data: "foo"},
{Data: string(restictest.Random(23, 12*1024*1024+1287898))},
}
for _, test := range tests {
t.Run("", func(t *testing.T) {
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
repo, cleanup := repository.TestRepository(t)
defer cleanup()
ts := time.Now()
filename := "xx"
readerFs := &fs.Reader{
ModTime: ts,
Mode: 0123,
Name: filename,
ReadCloser: ioutil.NopCloser(strings.NewReader(test.Data)),
}
node, stats := saveFile(t, repo, filename, readerFs)
TestEnsureFileContent(ctx, t, repo, "file", node, TestFile{Content: test.Data})
if stats.DataSize != uint64(len(test.Data)) {
t.Errorf("wrong stats returned in DataSize, want %d, got %d", len(test.Data), stats.DataSize)
}
if stats.DataBlobs <= 0 && len(test.Data) > 0 {
t.Errorf("wrong stats returned in DataBlobs, want > 0, got %d", stats.DataBlobs)
}
if stats.TreeSize != 0 {
t.Errorf("wrong stats returned in TreeSize, want 0, got %d", stats.TreeSize)
}
if stats.TreeBlobs != 0 {
t.Errorf("wrong stats returned in DataBlobs, want 0, got %d", stats.DataBlobs)
}
})
}
}
func BenchmarkArchiverSaveFileSmall(b *testing.B) {
const fileSize = 4 * 1024
d := TestDir{"file": TestFile{
Content: string(restictest.Random(23, fileSize)),
}}
b.SetBytes(fileSize)
for i := 0; i < b.N; i++ {
b.StopTimer()
tempdir, repo, cleanup := prepareTempdirRepoSrc(b, d)
b.StartTimer()
_, stats := saveFile(b, repo, filepath.Join(tempdir, "file"), fs.Track{fs.Local{}})
b.StopTimer()
if stats.DataSize != fileSize {
b.Errorf("wrong stats returned in DataSize, want %d, got %d", fileSize, stats.DataSize)
}
if stats.DataBlobs <= 0 {
b.Errorf("wrong stats returned in DataBlobs, want > 0, got %d", stats.DataBlobs)
}
if stats.TreeSize != 0 {
b.Errorf("wrong stats returned in TreeSize, want 0, got %d", stats.TreeSize)
}
if stats.TreeBlobs != 0 {
b.Errorf("wrong stats returned in DataBlobs, want 0, got %d", stats.DataBlobs)
}
cleanup()
b.StartTimer()
}
}
func BenchmarkArchiverSaveFileLarge(b *testing.B) {
const fileSize = 40*1024*1024 + 1287898
d := TestDir{"file": TestFile{
Content: string(restictest.Random(23, fileSize)),
}}
b.SetBytes(fileSize)
for i := 0; i < b.N; i++ {
b.StopTimer()
tempdir, repo, cleanup := prepareTempdirRepoSrc(b, d)
b.StartTimer()
_, stats := saveFile(b, repo, filepath.Join(tempdir, "file"), fs.Track{fs.Local{}})
b.StopTimer()
if stats.DataSize != fileSize {
b.Errorf("wrong stats returned in DataSize, want %d, got %d", fileSize, stats.DataSize)
}
if stats.DataBlobs <= 0 {
b.Errorf("wrong stats returned in DataBlobs, want > 0, got %d", stats.DataBlobs)
}
if stats.TreeSize != 0 {
b.Errorf("wrong stats returned in TreeSize, want 0, got %d", stats.TreeSize)
}
if stats.TreeBlobs != 0 {
b.Errorf("wrong stats returned in DataBlobs, want 0, got %d", stats.DataBlobs)
}
cleanup()
b.StartTimer()
}
}
type blobCountingRepo struct {
restic.Repository
m sync.Mutex
saved map[restic.BlobHandle]uint
}
func (repo *blobCountingRepo) SaveBlob(ctx context.Context, t restic.BlobType, buf []byte, id restic.ID) (restic.ID, error) {
id, err := repo.Repository.SaveBlob(ctx, t, buf, id)
h := restic.BlobHandle{ID: id, Type: t}
repo.m.Lock()
repo.saved[h]++
repo.m.Unlock()
return id, err
}
func (repo *blobCountingRepo) SaveTree(ctx context.Context, t *restic.Tree) (restic.ID, error) {
id, err := repo.Repository.SaveTree(ctx, t)
h := restic.BlobHandle{ID: id, Type: restic.TreeBlob}
repo.m.Lock()
repo.saved[h]++
repo.m.Unlock()
return id, err
}
func appendToFile(t testing.TB, filename string, data []byte) {
f, err := os.OpenFile(filename, os.O_CREATE|os.O_APPEND|os.O_WRONLY, 0644)
if err != nil {
t.Fatal(err)
}
_, err = f.Write(data)
if err != nil {
_ = f.Close()
t.Fatal(err)
}
err = f.Close()
if err != nil {
t.Fatal(err)
}
}
func TestArchiverSaveFileIncremental(t *testing.T) {
tempdir, removeTempdir := restictest.TempDir(t)
defer removeTempdir()
testRepo, removeRepository := repository.TestRepository(t)
defer removeRepository()
repo := &blobCountingRepo{
Repository: testRepo,
saved: make(map[restic.BlobHandle]uint),
}
data := restictest.Random(23, 512*1024+887898)
testfile := filepath.Join(tempdir, "testfile")
for i := 0; i < 3; i++ {
appendToFile(t, testfile, data)
node, _ := saveFile(t, repo, testfile, fs.Track{fs.Local{}})
t.Logf("node blobs: %v", node.Content)
for h, n := range repo.saved {
if n > 1 {
t.Errorf("iteration %v: blob %v saved more than once (%d times)", i, h, n)
}
}
}
}
func save(t testing.TB, filename string, data []byte) {
f, err := os.Create(filename)
if err != nil {
t.Fatal(err)
}
_, err = f.Write(data)
if err != nil {
t.Fatal(err)
}
err = f.Sync()
if err != nil {
t.Fatal(err)
}
err = f.Close()
if err != nil {
t.Fatal(err)
}
}
func lstat(t testing.TB, name string) os.FileInfo {
fi, err := os.Lstat(name)
if err != nil {
t.Fatal(err)
}
return fi
}
func setTimestamp(t testing.TB, filename string, atime, mtime time.Time) {
var utimes = [...]syscall.Timespec{
syscall.NsecToTimespec(atime.UnixNano()),
syscall.NsecToTimespec(mtime.UnixNano()),
}
err := syscall.UtimesNano(filename, utimes[:])
if err != nil {
t.Fatal(err)
}
}
func remove(t testing.TB, filename string) {
err := os.Remove(filename)
if err != nil {
t.Fatal(err)
}
}
func nodeFromFI(t testing.TB, filename string, fi os.FileInfo) *restic.Node {
node, err := restic.NodeFromFileInfo(filename, fi)
if err != nil {
t.Fatal(err)
}
return node
}
func TestFileChanged(t *testing.T) {
var defaultContent = []byte("foobar")
var d = 50 * time.Millisecond
if runtime.GOOS == "darwin" {
// on older darwin instances the file system only supports one second
// granularity
d = time.Second
}
sleep := func() {
time.Sleep(d)
}
var tests = []struct {
Name string
Content []byte
Modify func(t testing.TB, filename string)
}{
{
Name: "same-content-new-file",
Modify: func(t testing.TB, filename string) {
remove(t, filename)
sleep()
save(t, filename, defaultContent)
},
},
{
Name: "same-content-new-timestamp",
Modify: func(t testing.TB, filename string) {
sleep()
save(t, filename, defaultContent)
},
},
{
Name: "other-content",
Modify: func(t testing.TB, filename string) {
remove(t, filename)
sleep()
save(t, filename, []byte("xxxxxx"))
},
},
{
Name: "longer-content",
Modify: func(t testing.TB, filename string) {
save(t, filename, []byte("xxxxxxxxxxxxxxxxxxxxxx"))
},
},
{
Name: "new-file",
Modify: func(t testing.TB, filename string) {
remove(t, filename)
sleep()
save(t, filename, defaultContent)
},
},
}
for _, test := range tests {
t.Run(test.Name, func(t *testing.T) {
tempdir, cleanup := restictest.TempDir(t)
defer cleanup()
filename := filepath.Join(tempdir, "file")
content := defaultContent
if test.Content != nil {
content = test.Content
}
save(t, filename, content)
fiBefore := lstat(t, filename)
node := nodeFromFI(t, filename, fiBefore)
if fileChanged(fiBefore, node) {
t.Fatalf("unchanged file detected as changed")
}
test.Modify(t, filename)
fiAfter := lstat(t, filename)
if !fileChanged(fiAfter, node) {
t.Fatalf("modified file detected as unchanged")
}
})
}
}
func TestFilChangedSpecialCases(t *testing.T) {
tempdir, cleanup := restictest.TempDir(t)
defer cleanup()
filename := filepath.Join(tempdir, "file")
content := []byte("foobar")
save(t, filename, content)
t.Run("nil-node", func(t *testing.T) {
fi := lstat(t, filename)
if !fileChanged(fi, nil) {
t.Fatal("nil node detected as unchanged")
}
})
t.Run("type-change", func(t *testing.T) {
fi := lstat(t, filename)
node := nodeFromFI(t, filename, fi)
node.Type = "symlink"
if !fileChanged(fi, node) {
t.Fatal("node with changed type detected as unchanged")
}
})
}
func TestArchiverSaveDir(t *testing.T) {
const targetNodeName = "targetdir"
var tests = []struct {
src TestDir
chdir string
target string
want TestDir
}{
{
src: TestDir{
"targetfile": TestFile{Content: string(restictest.Random(888, 2*1024*1024+5000))},
},
target: ".",
want: TestDir{
"targetdir": TestDir{
"targetfile": TestFile{Content: string(restictest.Random(888, 2*1024*1024+5000))},
},
},
},
{
src: TestDir{
"targetdir": TestDir{
"foo": TestFile{Content: "foo"},
"emptyfile": TestFile{Content: ""},
"bar": TestFile{Content: "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXX"},
"largefile": TestFile{Content: string(restictest.Random(888, 2*1024*1024+5000))},
"largerfile": TestFile{Content: string(restictest.Random(234, 5*1024*1024+5000))},
},
},
target: "targetdir",
},
{
src: TestDir{
"foo": TestFile{Content: "foo"},
"emptyfile": TestFile{Content: ""},
"bar": TestFile{Content: "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXX"},
},
target: ".",
want: TestDir{
"targetdir": TestDir{
"foo": TestFile{Content: "foo"},
"emptyfile": TestFile{Content: ""},
"bar": TestFile{Content: "XXXXXXXXXXXXXXXXXXXXXXXXXXXXXX"},
},
},
},
{
src: TestDir{
"foo": TestDir{
"subdir": TestDir{
"x": TestFile{Content: "xxx"},
"y": TestFile{Content: "yyyyyyyyyyyyyyyy"},
"z": TestFile{Content: "zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz"},
},
"file": TestFile{Content: "just a test"},
},
},
chdir: "foo/subdir",
target: "../../",
want: TestDir{
"targetdir": TestDir{
"foo": TestDir{
"subdir": TestDir{
"x": TestFile{Content: "xxx"},
"y": TestFile{Content: "yyyyyyyyyyyyyyyy"},
"z": TestFile{Content: "zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz"},
},
"file": TestFile{Content: "just a test"},
},
},
},
},
{
src: TestDir{
"foo": TestDir{
"file": TestFile{Content: "just a test"},
"file2": TestFile{Content: "again"},
},
},
target: "./foo",
want: TestDir{
"targetdir": TestDir{
"file": TestFile{Content: "just a test"},
"file2": TestFile{Content: "again"},
},
},
},
}
for _, test := range tests {
t.Run("", func(t *testing.T) {
var tmb tomb.Tomb
ctx := tmb.Context(context.Background())
tempdir, repo, cleanup := prepareTempdirRepoSrc(t, test.src)
defer cleanup()
arch := New(repo, fs.Track{fs.Local{}}, Options{})
arch.runWorkers(ctx, &tmb)
chdir := tempdir
if test.chdir != "" {
chdir = filepath.Join(chdir, test.chdir)
}
back := fs.TestChdir(t, chdir)
defer back()
fi, err := fs.Lstat(test.target)
if err != nil {
t.Fatal(err)
}
ft, err := arch.SaveDir(ctx, "/", fi, test.target, nil)
if err != nil {
t.Fatal(err)
}
ft.Wait(ctx)
node, stats := ft.Node(), ft.Stats()
tmb.Kill(nil)
err = tmb.Wait()
if err != nil {
t.Fatal(err)
}
t.Logf("stats: %v", stats)
if stats.DataSize != 0 {
t.Errorf("wrong stats returned in DataSize, want 0, got %d", stats.DataSize)
}
if stats.DataBlobs != 0 {
t.Errorf("wrong stats returned in DataBlobs, want 0, got %d", stats.DataBlobs)
}
if stats.TreeSize <= 0 {
t.Errorf("wrong stats returned in TreeSize, want > 0, got %d", stats.TreeSize)
}
if stats.TreeBlobs <= 0 {
t.Errorf("wrong stats returned in TreeBlobs, want > 0, got %d", stats.TreeBlobs)
}
node.Name = targetNodeName
tree := &restic.Tree{Nodes: []*restic.Node{node}}
treeID, err := repo.SaveTree(ctx, tree)
if err != nil {
t.Fatal(err)
}
err = repo.Flush(ctx)
if err != nil {
t.Fatal(err)
}
err = repo.SaveIndex(ctx)
if err != nil {
t.Fatal(err)
}
want := test.want
if want == nil {
want = test.src
}
TestEnsureTree(ctx, t, "/", repo, treeID, want)
})
}
}
func TestArchiverSaveDirIncremental(t *testing.T) {
tempdir, removeTempdir := restictest.TempDir(t)
defer removeTempdir()
testRepo, removeRepository := repository.TestRepository(t)
defer removeRepository()
repo := &blobCountingRepo{
Repository: testRepo,
saved: make(map[restic.BlobHandle]uint),
}
appendToFile(t, filepath.Join(tempdir, "testfile"), []byte("foobar"))
// save the empty directory several times in a row, then have a look if the
// archiver did save the same tree several times
for i := 0; i < 5; i++ {
var tmb tomb.Tomb
ctx := tmb.Context(context.Background())
arch := New(repo, fs.Track{fs.Local{}}, Options{})
arch.runWorkers(ctx, &tmb)
fi, err := fs.Lstat(tempdir)
if err != nil {
t.Fatal(err)
}
ft, err := arch.SaveDir(ctx, "/", fi, tempdir, nil)
if err != nil {
t.Fatal(err)
}
ft.Wait(ctx)
node, stats := ft.Node(), ft.Stats()
tmb.Kill(nil)
err = tmb.Wait()
if err != nil {
t.Fatal(err)
}
if i == 0 {
// operation must have added new tree data
if stats.DataSize != 0 {
t.Errorf("wrong stats returned in DataSize, want 0, got %d", stats.DataSize)
}
if stats.DataBlobs != 0 {
t.Errorf("wrong stats returned in DataBlobs, want 0, got %d", stats.DataBlobs)
}
if stats.TreeSize <= 0 {
t.Errorf("wrong stats returned in TreeSize, want > 0, got %d", stats.TreeSize)
}
if stats.TreeBlobs <= 0 {
t.Errorf("wrong stats returned in TreeBlobs, want > 0, got %d", stats.TreeBlobs)
}
} else {
// operation must not have added any new data
if stats.DataSize != 0 {
t.Errorf("wrong stats returned in DataSize, want 0, got %d", stats.DataSize)
}
if stats.DataBlobs != 0 {
t.Errorf("wrong stats returned in DataBlobs, want 0, got %d", stats.DataBlobs)
}
if stats.TreeSize != 0 {
t.Errorf("wrong stats returned in TreeSize, want 0, got %d", stats.TreeSize)
}
if stats.TreeBlobs != 0 {
t.Errorf("wrong stats returned in TreeBlobs, want 0, got %d", stats.TreeBlobs)
}
}
t.Logf("node subtree %v", node.Subtree)
err = repo.Flush(ctx)
if err != nil {
t.Fatal(err)
}
err = repo.SaveIndex(ctx)
if err != nil {
t.Fatal(err)
}
for h, n := range repo.saved {
if n > 1 {
t.Errorf("iteration %v: blob %v saved more than once (%d times)", i, h, n)
}
}
}
}
func TestArchiverSaveTree(t *testing.T) {
symlink := func(from, to string) func(t testing.TB) {
return func(t testing.TB) {
err := os.Symlink(from, to)
if err != nil {
t.Fatal(err)
}
}
}
var tests = []struct {
src TestDir
prepare func(t testing.TB)
targets []string
want TestDir
}{
{
src: TestDir{
"targetfile": TestFile{Content: string("foobar")},
},
targets: []string{"targetfile"},
want: TestDir{
"targetfile": TestFile{Content: string("foobar")},
},
},
{
src: TestDir{
"targetfile": TestFile{Content: string("foobar")},
},
prepare: symlink("targetfile", "filesymlink"),
targets: []string{"targetfile", "filesymlink"},
want: TestDir{
"targetfile": TestFile{Content: string("foobar")},
"filesymlink": TestSymlink{Target: "targetfile"},
},
},
{
src: TestDir{
"dir": TestDir{
"subdir": TestDir{
"subsubdir": TestDir{
"targetfile": TestFile{Content: string("foobar")},
},
},
"otherfile": TestFile{Content: string("xxx")},
},
},
prepare: symlink("subdir", filepath.FromSlash("dir/symlink")),
targets: []string{filepath.FromSlash("dir/symlink")},
want: TestDir{
"dir": TestDir{
"symlink": TestSymlink{Target: "subdir"},
},
},
},
{
src: TestDir{
"dir": TestDir{
"subdir": TestDir{
"subsubdir": TestDir{
"targetfile": TestFile{Content: string("foobar")},
},
},
"otherfile": TestFile{Content: string("xxx")},
},
},
prepare: symlink("subdir", filepath.FromSlash("dir/symlink")),
targets: []string{filepath.FromSlash("dir/symlink/subsubdir")},
want: TestDir{
"dir": TestDir{
"symlink": TestDir{
"subsubdir": TestDir{
"targetfile": TestFile{Content: string("foobar")},
},
},
},
},
},
}
for _, test := range tests {
t.Run("", func(t *testing.T) {
var tmb tomb.Tomb
ctx := tmb.Context(context.Background())
tempdir, repo, cleanup := prepareTempdirRepoSrc(t, test.src)
defer cleanup()
testFS := fs.Track{fs.Local{}}
arch := New(repo, testFS, Options{})
arch.runWorkers(ctx, &tmb)
back := fs.TestChdir(t, tempdir)
defer back()
if test.prepare != nil {
test.prepare(t)
}
atree, err := NewTree(testFS, test.targets)
if err != nil {
t.Fatal(err)
}
tree, err := arch.SaveTree(ctx, "/", atree, nil)
if err != nil {
t.Fatal(err)
}
treeID, err := repo.SaveTree(ctx, tree)
if err != nil {
t.Fatal(err)
}
tmb.Kill(nil)
err = tmb.Wait()
if err != nil {
t.Fatal(err)
}
err = repo.Flush(ctx)
if err != nil {
t.Fatal(err)
}
err = repo.SaveIndex(ctx)
if err != nil {
t.Fatal(err)
}
want := test.want
if want == nil {
want = test.src
}
TestEnsureTree(ctx, t, "/", repo, treeID, want)
})
}
}
func TestArchiverSnapshot(t *testing.T) {
var tests = []struct {
name string
src TestDir
want TestDir
chdir string
targets []string
}{
{
name: "single-file",
src: TestDir{
"foo": TestFile{Content: "foo"},
},
targets: []string{"foo"},
},
{
name: "file-current-dir",
src: TestDir{
"foo": TestFile{Content: "foo"},
},
targets: []string{"./foo"},
},
{
name: "dir",
src: TestDir{
"target": TestDir{
"foo": TestFile{Content: "foo"},
},
},
targets: []string{"target"},
},
{
name: "dir-current-dir",
src: TestDir{
"target": TestDir{
"foo": TestFile{Content: "foo"},
},
},
targets: []string{"./target"},
},
{
name: "content-dir-current-dir",
src: TestDir{
"target": TestDir{
"foo": TestFile{Content: "foo"},
},
},
targets: []string{"./target/."},
},
{
name: "current-dir",
src: TestDir{
"target": TestDir{
"foo": TestFile{Content: "foo"},
},
},
targets: []string{"."},
},
{
name: "subdir",
src: TestDir{
"subdir": TestDir{
"foo": TestFile{Content: "foo"},
"subsubdir": TestDir{
"foo": TestFile{Content: "foo in subsubdir"},
},
},
"other": TestFile{Content: "another file"},
},
targets: []string{"subdir"},
want: TestDir{
"subdir": TestDir{
"foo": TestFile{Content: "foo"},
"subsubdir": TestDir{
"foo": TestFile{Content: "foo in subsubdir"},
},
},
},
},
{
name: "subsubdir",
src: TestDir{
"subdir": TestDir{
"foo": TestFile{Content: "foo"},
"subsubdir": TestDir{
"foo": TestFile{Content: "foo in subsubdir"},
},
},
"other": TestFile{Content: "another file"},
},
targets: []string{"subdir/subsubdir"},
want: TestDir{
"subdir": TestDir{
"subsubdir": TestDir{
"foo": TestFile{Content: "foo in subsubdir"},
},
},
},
},
{
name: "parent-dir",
src: TestDir{
"subdir": TestDir{
"foo": TestFile{Content: "foo"},
},
"other": TestFile{Content: "another file"},
},
chdir: "subdir",
targets: []string{".."},
},
{
name: "parent-parent-dir",
src: TestDir{
"subdir": TestDir{
"foo": TestFile{Content: "foo"},
"subsubdir": TestDir{
"empty": TestFile{Content: ""},
},
},
"other": TestFile{Content: "another file"},
},
chdir: "subdir/subsubdir",
targets: []string{"../.."},
},
{
name: "parent-parent-dir-slash",
src: TestDir{
"subdir": TestDir{
"subsubdir": TestDir{
"foo": TestFile{Content: "foo"},
},
},
"other": TestFile{Content: "another file"},
},
chdir: "subdir/subsubdir",
targets: []string{"../../"},
want: TestDir{
"subdir": TestDir{
"subsubdir": TestDir{
"foo": TestFile{Content: "foo"},
},
},
"other": TestFile{Content: "another file"},
},
},
{
name: "parent-subdir",
src: TestDir{
"subdir": TestDir{
"foo": TestFile{Content: "foo"},
},
"other": TestFile{Content: "another file"},
},
chdir: "subdir",
targets: []string{"../subdir"},
want: TestDir{
"subdir": TestDir{
"foo": TestFile{Content: "foo"},
},
},
},
{
name: "parent-parent-dir-subdir",
src: TestDir{
"subdir": TestDir{
"subsubdir": TestDir{
"foo": TestFile{Content: "foo"},
},
},
"other": TestFile{Content: "another file"},
},
chdir: "subdir/subsubdir",
targets: []string{"../../subdir/subsubdir"},
want: TestDir{
"subdir": TestDir{
"subsubdir": TestDir{
"foo": TestFile{Content: "foo"},
},
},
},
},
{
name: "included-multiple1",
src: TestDir{
"subdir": TestDir{
"subsubdir": TestDir{
"foo": TestFile{Content: "foo"},
},
"other": TestFile{Content: "another file"},
},
},
targets: []string{"subdir", "subdir/subsubdir"},
},
{
name: "included-multiple2",
src: TestDir{
"subdir": TestDir{
"subsubdir": TestDir{
"foo": TestFile{Content: "foo"},
},
"other": TestFile{Content: "another file"},
},
},
targets: []string{"subdir/subsubdir", "subdir"},
},
{
name: "collision",
src: TestDir{
"subdir": TestDir{
"foo": TestFile{Content: "foo in subdir"},
"subsubdir": TestDir{
"foo": TestFile{Content: "foo in subsubdir"},
},
},
"foo": TestFile{Content: "another file"},
},
chdir: "subdir",
targets: []string{".", "../foo"},
want: TestDir{
"foo": TestFile{Content: "foo in subdir"},
"subsubdir": TestDir{
"foo": TestFile{Content: "foo in subsubdir"},
},
"foo-1": TestFile{Content: "another file"},
},
},
}
for _, test := range tests {
t.Run(test.name, func(t *testing.T) {
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
tempdir, repo, cleanup := prepareTempdirRepoSrc(t, test.src)
defer cleanup()
arch := New(repo, fs.Track{fs.Local{}}, Options{})
chdir := tempdir
if test.chdir != "" {
chdir = filepath.Join(chdir, filepath.FromSlash(test.chdir))
}
back := fs.TestChdir(t, chdir)
defer back()
var targets []string
for _, target := range test.targets {
targets = append(targets, os.ExpandEnv(target))
}
t.Logf("targets: %v", targets)
sn, snapshotID, err := arch.Snapshot(ctx, targets, SnapshotOptions{Time: time.Now()})
if err != nil {
t.Fatal(err)
}
t.Logf("saved as %v", snapshotID.Str())
want := test.want
if want == nil {
want = test.src
}
TestEnsureSnapshot(t, repo, snapshotID, want)
checker.TestCheckRepo(t, repo)
// check that the snapshot contains the targets with absolute paths
for i, target := range sn.Paths {
atarget, err := filepath.Abs(test.targets[i])
if err != nil {
t.Fatal(err)
}
if target != atarget {
t.Errorf("wrong path in snapshot: want %v, got %v", atarget, target)
}
}
})
}
}
func TestArchiverSnapshotSelect(t *testing.T) {
var tests = []struct {
name string
src TestDir
want TestDir
selFn SelectFunc
}{
{
name: "include-all",
src: TestDir{
"work": TestDir{
"foo": TestFile{Content: "foo"},
"foo.txt": TestFile{Content: "foo text file"},
"subdir": TestDir{
"other": TestFile{Content: "other in subdir"},
"bar.txt": TestFile{Content: "bar.txt in subdir"},
},
},
"other": TestFile{Content: "another file"},
},
selFn: func(item string, fi os.FileInfo) bool {
return true
},
},
{
name: "exclude-all",
src: TestDir{
"work": TestDir{
"foo": TestFile{Content: "foo"},
"foo.txt": TestFile{Content: "foo text file"},
"subdir": TestDir{
"other": TestFile{Content: "other in subdir"},
"bar.txt": TestFile{Content: "bar.txt in subdir"},
},
},
"other": TestFile{Content: "another file"},
},
selFn: func(item string, fi os.FileInfo) bool {
return false
},
want: TestDir{},
},
{
name: "exclude-txt-files",
src: TestDir{
"work": TestDir{
"foo": TestFile{Content: "foo"},
"foo.txt": TestFile{Content: "foo text file"},
"subdir": TestDir{
"other": TestFile{Content: "other in subdir"},
"bar.txt": TestFile{Content: "bar.txt in subdir"},
},
},
"other": TestFile{Content: "another file"},
},
want: TestDir{
"work": TestDir{
"foo": TestFile{Content: "foo"},
"subdir": TestDir{
"other": TestFile{Content: "other in subdir"},
},
},
"other": TestFile{Content: "another file"},
},
selFn: func(item string, fi os.FileInfo) bool {
if filepath.Ext(item) == ".txt" {
return false
}
return true
},
},
{
name: "exclude-dir",
src: TestDir{
"work": TestDir{
"foo": TestFile{Content: "foo"},
"foo.txt": TestFile{Content: "foo text file"},
"subdir": TestDir{
"other": TestFile{Content: "other in subdir"},
"bar.txt": TestFile{Content: "bar.txt in subdir"},
},
},
"other": TestFile{Content: "another file"},
},
want: TestDir{
"work": TestDir{
"foo": TestFile{Content: "foo"},
"foo.txt": TestFile{Content: "foo text file"},
},
"other": TestFile{Content: "another file"},
},
selFn: func(item string, fi os.FileInfo) bool {
if filepath.Base(item) == "subdir" {
return false
}
return true
},
},
{
name: "select-absolute-paths",
src: TestDir{
"foo": TestFile{Content: "foo"},
},
selFn: func(item string, fi os.FileInfo) bool {
return filepath.IsAbs(item)
},
},
}
for _, test := range tests {
t.Run(test.name, func(t *testing.T) {
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
tempdir, repo, cleanup := prepareTempdirRepoSrc(t, test.src)
defer cleanup()
arch := New(repo, fs.Track{fs.Local{}}, Options{})
arch.Select = test.selFn
back := fs.TestChdir(t, tempdir)
defer back()
targets := []string{"."}
_, snapshotID, err := arch.Snapshot(ctx, targets, SnapshotOptions{Time: time.Now()})
if err != nil {
t.Fatal(err)
}
t.Logf("saved as %v", snapshotID.Str())
want := test.want
if want == nil {
want = test.src
}
TestEnsureSnapshot(t, repo, snapshotID, want)
checker.TestCheckRepo(t, repo)
})
}
}
// MockFS keeps track which files are read.
type MockFS struct {
fs.FS
m sync.Mutex
bytesRead map[string]int // tracks bytes read from all opened files
}
func (m *MockFS) Open(name string) (fs.File, error) {
f, err := m.FS.Open(name)
if err != nil {
return f, err
}
return MockFile{File: f, fs: m, filename: name}, nil
}
func (m *MockFS) OpenFile(name string, flag int, perm os.FileMode) (fs.File, error) {
f, err := m.FS.OpenFile(name, flag, perm)
if err != nil {
return f, err
}
return MockFile{File: f, fs: m, filename: name}, nil
}
type MockFile struct {
fs.File
filename string
fs *MockFS
}
func (f MockFile) Read(p []byte) (int, error) {
n, err := f.File.Read(p)
if n > 0 {
f.fs.m.Lock()
f.fs.bytesRead[f.filename] += n
f.fs.m.Unlock()
}
return n, err
}
func TestArchiverParent(t *testing.T) {
var tests = []struct {
src TestDir
read map[string]int // tracks number of times a file must have been read
}{
{
src: TestDir{
"targetfile": TestFile{Content: string(restictest.Random(888, 2*1024*1024+5000))},
},
read: map[string]int{
"targetfile": 1,
},
},
}
for _, test := range tests {
t.Run("", func(t *testing.T) {
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
tempdir, repo, cleanup := prepareTempdirRepoSrc(t, test.src)
defer cleanup()
testFS := &MockFS{
FS: fs.Track{fs.Local{}},
bytesRead: make(map[string]int),
}
arch := New(repo, testFS, Options{})
back := fs.TestChdir(t, tempdir)
defer back()
_, firstSnapshotID, err := arch.Snapshot(ctx, []string{"."}, SnapshotOptions{Time: time.Now()})
if err != nil {
t.Fatal(err)
}
t.Logf("first backup saved as %v", firstSnapshotID.Str())
t.Logf("testfs: %v", testFS)
// check that all files have been read exactly once
TestWalkFiles(t, ".", test.src, func(filename string, item interface{}) error {
file, ok := item.(TestFile)
if !ok {
return nil
}
n, ok := testFS.bytesRead[filename]
if !ok {
t.Fatalf("file %v was not read at all", filename)
}
if n != len(file.Content) {
t.Fatalf("file %v: read %v bytes, wanted %v bytes", filename, n, len(file.Content))
}
return nil
})
opts := SnapshotOptions{
Time: time.Now(),
ParentSnapshot: firstSnapshotID,
}
_, secondSnapshotID, err := arch.Snapshot(ctx, []string{"."}, opts)
if err != nil {
t.Fatal(err)
}
// check that all files still been read exactly once
TestWalkFiles(t, ".", test.src, func(filename string, item interface{}) error {
file, ok := item.(TestFile)
if !ok {
return nil
}
n, ok := testFS.bytesRead[filename]
if !ok {
t.Fatalf("file %v was not read at all", filename)
}
if n != len(file.Content) {
t.Fatalf("file %v: read %v bytes, wanted %v bytes", filename, n, len(file.Content))
}
return nil
})
t.Logf("second backup saved as %v", secondSnapshotID.Str())
t.Logf("testfs: %v", testFS)
checker.TestCheckRepo(t, repo)
})
}
}
func TestArchiverErrorReporting(t *testing.T) {
ignoreErrorForBasename := func(basename string) ErrorFunc {
return func(item string, fi os.FileInfo, err error) error {
if filepath.Base(item) == "targetfile" {
t.Logf("ignoring error for targetfile: %v", err)
return nil
}
t.Errorf("error handler called for unexpected file %v: %v", item, err)
return err
}
}
chmodUnreadable := func(filename string) func(testing.TB) {
return func(t testing.TB) {
if runtime.GOOS == "windows" {
t.Skip("Skipping this test for windows")
}
err := os.Chmod(filepath.FromSlash(filename), 0004)
if err != nil {
t.Fatal(err)
}
}
}
var tests = []struct {
name string
src TestDir
want TestDir
prepare func(t testing.TB)
errFn ErrorFunc
mustError bool
}{
{
name: "no-error",
src: TestDir{
"targetfile": TestFile{Content: "foobar"},
},
},
{
name: "file-unreadable",
src: TestDir{
"targetfile": TestFile{Content: "foobar"},
},
prepare: chmodUnreadable("targetfile"),
mustError: true,
},
{
name: "file-unreadable-ignore-error",
src: TestDir{
"targetfile": TestFile{Content: "foobar"},
"other": TestFile{Content: "xxx"},
},
want: TestDir{
"other": TestFile{Content: "xxx"},
},
prepare: chmodUnreadable("targetfile"),
errFn: ignoreErrorForBasename("targetfile"),
},
{
name: "file-subdir-unreadable",
src: TestDir{
"subdir": TestDir{
"targetfile": TestFile{Content: "foobar"},
},
},
prepare: chmodUnreadable("subdir/targetfile"),
mustError: true,
},
{
name: "file-subdir-unreadable-ignore-error",
src: TestDir{
"subdir": TestDir{
"targetfile": TestFile{Content: "foobar"},
"other": TestFile{Content: "xxx"},
},
},
want: TestDir{
"subdir": TestDir{
"other": TestFile{Content: "xxx"},
},
},
prepare: chmodUnreadable("subdir/targetfile"),
errFn: ignoreErrorForBasename("targetfile"),
},
}
for _, test := range tests {
t.Run(test.name, func(t *testing.T) {
ctx, cancel := context.WithCancel(context.Background())
defer cancel()
tempdir, repo, cleanup := prepareTempdirRepoSrc(t, test.src)
defer cleanup()
back := fs.TestChdir(t, tempdir)
defer back()
if test.prepare != nil {
test.prepare(t)
}
arch := New(repo, fs.Track{fs.Local{}}, Options{})
arch.Error = test.errFn
_, snapshotID, err := arch.Snapshot(ctx, []string{"."}, SnapshotOptions{Time: time.Now()})
if test.mustError {
if err != nil {
t.Logf("found expected error (%v), skipping further checks", err)
return
}
t.Fatalf("expected error not returned by archiver")
return
}
if err != nil {
t.Fatalf("unexpected error of type %T found: %v", err, err)
}
t.Logf("saved as %v", snapshotID.Str())
want := test.want
if want == nil {
want = test.src
}
TestEnsureSnapshot(t, repo, snapshotID, want)
checker.TestCheckRepo(t, repo)
})
}
}