forked from TrueCloudLab/restic
124 lines
2.9 KiB
Go
124 lines
2.9 KiB
Go
//go:build !windows
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// +build !windows
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package restorer
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import (
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"bytes"
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"context"
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"io/ioutil"
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"math"
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"os"
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"path/filepath"
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"syscall"
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"testing"
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"github.com/restic/restic/internal/archiver"
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"github.com/restic/restic/internal/fs"
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"github.com/restic/restic/internal/repository"
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"github.com/restic/restic/internal/restic"
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rtest "github.com/restic/restic/internal/test"
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)
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func TestRestorerRestoreEmptyHardlinkedFileds(t *testing.T) {
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repo, cleanup := repository.TestRepository(t)
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defer cleanup()
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_, id := saveSnapshot(t, repo, Snapshot{
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Nodes: map[string]Node{
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"dirtest": Dir{
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Nodes: map[string]Node{
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"file1": File{Links: 2, Inode: 1},
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"file2": File{Links: 2, Inode: 1},
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},
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},
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},
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})
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res, err := NewRestorer(context.TODO(), repo, id, false)
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rtest.OK(t, err)
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res.SelectFilter = func(item string, dstpath string, node *restic.Node) (selectedForRestore bool, childMayBeSelected bool) {
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return true, true
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}
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tempdir, cleanup := rtest.TempDir(t)
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defer cleanup()
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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err = res.RestoreTo(ctx, tempdir)
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rtest.OK(t, err)
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f1, err := os.Stat(filepath.Join(tempdir, "dirtest/file1"))
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rtest.OK(t, err)
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rtest.Equals(t, int64(0), f1.Size())
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s1, ok1 := f1.Sys().(*syscall.Stat_t)
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f2, err := os.Stat(filepath.Join(tempdir, "dirtest/file2"))
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rtest.OK(t, err)
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rtest.Equals(t, int64(0), f2.Size())
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s2, ok2 := f2.Sys().(*syscall.Stat_t)
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if ok1 && ok2 {
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rtest.Equals(t, s1.Ino, s2.Ino)
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}
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}
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func TestRestorerSparseFiles(t *testing.T) {
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repo, cleanup := repository.TestRepository(t)
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defer cleanup()
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var zeros [1<<20 + 13]byte
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target := &fs.Reader{
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Mode: 0600,
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Name: "/zeros",
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ReadCloser: ioutil.NopCloser(bytes.NewReader(zeros[:])),
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}
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sc := archiver.NewScanner(target)
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err := sc.Scan(context.TODO(), []string{"/zeros"})
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rtest.OK(t, err)
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arch := archiver.New(repo, target, archiver.Options{})
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_, id, err := arch.Snapshot(context.Background(), []string{"/zeros"},
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archiver.SnapshotOptions{})
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rtest.OK(t, err)
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res, err := NewRestorer(context.TODO(), repo, id, true)
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rtest.OK(t, err)
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tempdir, cleanup := rtest.TempDir(t)
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defer cleanup()
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ctx, cancel := context.WithCancel(context.Background())
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defer cancel()
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err = res.RestoreTo(ctx, tempdir)
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rtest.OK(t, err)
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filename := filepath.Join(tempdir, "zeros")
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content, err := ioutil.ReadFile(filename)
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rtest.OK(t, err)
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rtest.Equals(t, len(zeros[:]), len(content))
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rtest.Equals(t, zeros[:], content)
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fi, err := os.Stat(filename)
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rtest.OK(t, err)
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st := fi.Sys().(*syscall.Stat_t)
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if st == nil {
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return
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}
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// st.Blocks is the size in 512-byte blocks.
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denseBlocks := math.Ceil(float64(len(zeros)) / 512)
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sparsity := 1 - float64(st.Blocks)/denseBlocks
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// This should report 100% sparse. We don't assert that,
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// as the behavior of sparse writes depends on the underlying
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// file system as well as the OS.
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t.Logf("wrote %d zeros as %d blocks, %.1f%% sparse",
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len(zeros), st.Blocks, 100*sparsity)
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}
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