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go-mtree/tar_test.go
Vincent Batts 40f4ce8108
check: remove unused TarCheck(), for Compare()
Signed-off-by: Vincent Batts <vbatts@hashbangbash.com>
2018-12-10 11:26:12 -05:00

407 lines
9.1 KiB
Go

package mtree
import (
"archive/tar"
"bytes"
"io"
"io/ioutil"
"os"
"path/filepath"
"syscall"
"testing"
"time"
)
func ExampleStreamer() {
fh, err := os.Open("./testdata/test.tar")
if err != nil {
// handle error ...
}
str := NewTarStreamer(fh, nil, nil)
if err := extractTar("/tmp/dir", str); err != nil {
// handle error ...
}
dh, err := str.Hierarchy()
if err != nil {
// handle error ...
}
res, err := Check("/tmp/dir/", dh, nil, nil)
if err != nil {
// handle error ...
}
if len(res) > 0 {
// handle validation issue ...
}
}
func extractTar(root string, tr io.Reader) error {
return nil
}
func TestTar(t *testing.T) {
/*
data, err := makeTarStream()
if err != nil {
t.Fatal(err)
}
buf := bytes.NewBuffer(data)
str := NewTarStreamer(buf, append(DefaultKeywords, "sha1"))
*/
/*
// open empty folder and check size.
fh, err := os.Open("./testdata/empty")
if err != nil {
t.Fatal(err)
}
log.Println(fh.Stat())
fh.Close() */
fh, err := os.Open("./testdata/test.tar")
if err != nil {
t.Fatal(err)
}
str := NewTarStreamer(fh, nil, append(DefaultKeywords, "sha1"))
if _, err := io.Copy(ioutil.Discard, str); err != nil && err != io.EOF {
t.Fatal(err)
}
if err := str.Close(); err != nil {
t.Fatal(err)
}
defer fh.Close()
// get DirectoryHierarcy struct from walking the tar archive
tdh, err := str.Hierarchy()
if err != nil {
t.Fatal(err)
}
if tdh == nil {
t.Fatal("expected a DirectoryHierarchy struct, but got nil")
}
testDir, present := os.LookupEnv("MTREE_TESTDIR")
if present == false {
testDir = "."
}
testPath := filepath.Join(testDir, "test.mtree")
fh, err = os.Create(testPath)
if err != nil {
t.Fatal(err)
}
defer os.Remove(testPath)
// put output of tar walk into test.mtree
_, err = tdh.WriteTo(fh)
if err != nil {
t.Fatal(err)
}
fh.Close()
// now simulate gomtree -T testdata/test.tar -f testdata/test.mtree
fh, err = os.Open(testPath)
if err != nil {
t.Fatal(err)
}
defer fh.Close()
dh, err := ParseSpec(fh)
if err != nil {
t.Fatal(err)
}
res, err := Compare(tdh, dh, append(DefaultKeywords, "sha1"))
if err != nil {
t.Fatal(err)
}
// print any failures, and then call t.Fatal once all failures/extra/missing
// are outputted
if len(res) > 0 {
for _, delta := range res {
t.Error(delta)
}
t.Fatal("unexpected errors")
}
}
// This test checks how gomtree handles archives that were created
// with multiple directories, i.e, archives created with something like:
// `tar -cvf some.tar dir1 dir2 dir3 dir4/dir5 dir6` ... etc.
// The testdata of collection.tar resemble such an archive. the `collection` folder
// is the contents of `collection.tar` extracted
func TestArchiveCreation(t *testing.T) {
fh, err := os.Open("./testdata/collection.tar")
if err != nil {
t.Fatal(err)
}
str := NewTarStreamer(fh, nil, []Keyword{"sha1"})
if _, err := io.Copy(ioutil.Discard, str); err != nil && err != io.EOF {
t.Fatal(err)
}
if err := str.Close(); err != nil {
t.Fatal(err)
}
defer fh.Close()
// get DirectoryHierarcy struct from walking the tar archive
tdh, err := str.Hierarchy()
if err != nil {
t.Fatal(err)
}
// Test the tar manifest against the actual directory
res, err := Check("./testdata/collection", tdh, []Keyword{"sha1"}, nil)
if err != nil {
t.Fatal(err)
}
if len(res) > 0 {
for _, delta := range res {
t.Error(delta)
}
t.Fatal("unexpected errors")
}
// Test the tar manifest against itself
res, err = Compare(tdh, tdh, []Keyword{"sha1"})
if err != nil {
t.Fatal(err)
}
if len(res) > 0 {
for _, delta := range res {
t.Error(delta)
}
t.Fatal("unexpected errors")
}
// Validate the directory manifest against the archive
dh, err := Walk("./testdata/collection", nil, []Keyword{"sha1"}, nil)
if err != nil {
t.Fatal(err)
}
res, err = Compare(tdh, dh, []Keyword{"sha1"})
if err != nil {
t.Fatal(err)
}
if len(res) > 0 {
for _, delta := range res {
t.Error(delta)
}
t.Fatal("unexpected errors")
}
}
// Now test a tar file that was created with just the path to a file. In this
// test case, the traversal and creation of "placeholder" directories are
// evaluated. Also, The fact that this archive contains a single entry, yet the
// entry is associated with a file that has parent directories, means that the
// "." directory should be the lowest sub-directory under which `file` is contained.
func TestTreeTraversal(t *testing.T) {
fh, err := os.Open("./testdata/traversal.tar")
if err != nil {
t.Fatal(err)
}
str := NewTarStreamer(fh, nil, DefaultTarKeywords)
if _, err = io.Copy(ioutil.Discard, str); err != nil && err != io.EOF {
t.Fatal(err)
}
if err = str.Close(); err != nil {
t.Fatal(err)
}
fh.Close()
tdh, err := str.Hierarchy()
if err != nil {
t.Fatal(err)
}
res, err := Compare(tdh, tdh, []Keyword{"sha1"})
if err != nil {
t.Fatal(err)
}
if len(res) > 0 {
for _, delta := range res {
t.Error(delta)
}
t.Fatal("unexpected errors")
}
// top-level "." directory will contain contents of traversal.tar
res, err = Check("./testdata/.", tdh, []Keyword{"sha1"}, nil)
if err != nil {
t.Fatal(err)
}
if len(res) > 0 {
var failed bool
for _, delta := range res {
// We only care about missing or modified files.
// The original test was written using the old check code.
if delta.Type() != Extra {
failed = true
t.Error(delta)
}
}
if failed {
t.Fatal("unexpected errors")
}
}
// Now test an archive that requires placeholder directories, i.e, there are
// no headers in the archive that are associated with the actual directory name
fh, err = os.Open("./testdata/singlefile.tar")
if err != nil {
t.Fatal(err)
}
str = NewTarStreamer(fh, nil, DefaultTarKeywords)
if _, err = io.Copy(ioutil.Discard, str); err != nil && err != io.EOF {
t.Fatal(err)
}
if err = str.Close(); err != nil {
t.Fatal(err)
}
tdh, err = str.Hierarchy()
if err != nil {
t.Fatal(err)
}
// Implied top-level "." directory will contain the contents of singlefile.tar
res, err = Check("./testdata/.", tdh, []Keyword{"sha1"}, nil)
if err != nil {
t.Fatal(err)
}
if len(res) > 0 {
var failed bool
for _, delta := range res {
// We only care about missing or modified files.
// The original test was written using the old check code.
if delta.Type() != Extra {
failed = true
t.Error(delta)
}
}
if failed {
t.Fatal("unexpected errors")
}
}
}
func TestHardlinks(t *testing.T) {
fh, err := os.Open("./testdata/hardlinks.tar")
if err != nil {
t.Fatal(err)
}
str := NewTarStreamer(fh, nil, append(DefaultTarKeywords, "nlink"))
if _, err = io.Copy(ioutil.Discard, str); err != nil && err != io.EOF {
t.Fatal(err)
}
if err = str.Close(); err != nil {
t.Fatal(err)
}
fh.Close()
tdh, err := str.Hierarchy()
if err != nil {
t.Fatal(err)
}
foundnlink := false
for _, e := range tdh.Entries {
if e.Type == RelativeType {
for _, kv := range e.Keywords {
if KeyVal(kv).Keyword() == "nlink" {
foundnlink = true
if KeyVal(kv).Value() != "3" {
t.Errorf("expected to have 3 hardlinks for %s", e.Name)
}
}
}
}
}
if !foundnlink {
t.Errorf("nlink expected to be evaluated")
}
}
type fakeFile struct {
Name, Body string
Mode int64
Type byte
Sec, Nsec int64
Xattrs map[string]string
}
// minimal tar archive that mimics what is in ./testdata/test.tar
var minimalFiles = []fakeFile{
{"x/", "", 0755, '5', 0, 0, nil},
{"x/files", "howdy\n", 0644, '0', 0, 0, nil},
}
func makeTarStream(ff []fakeFile) ([]byte, error) {
buf := new(bytes.Buffer)
// Create a new tar archive.
tw := tar.NewWriter(buf)
// Add some files to the archive.
for _, file := range ff {
hdr := &tar.Header{
Name: file.Name,
Uid: syscall.Getuid(),
Gid: syscall.Getgid(),
Mode: file.Mode,
Typeflag: file.Type,
Size: int64(len(file.Body)),
ModTime: time.Unix(file.Sec, file.Nsec),
AccessTime: time.Unix(file.Sec, file.Nsec),
ChangeTime: time.Unix(file.Sec, file.Nsec),
Xattrs: file.Xattrs,
}
if err := tw.WriteHeader(hdr); err != nil {
return nil, err
}
if len(file.Body) > 0 {
if _, err := tw.Write([]byte(file.Body)); err != nil {
return nil, err
}
}
}
// Make sure to check the error on Close.
if err := tw.Close(); err != nil {
return nil, err
}
return buf.Bytes(), nil
}
func TestArchiveExcludeNonDirectory(t *testing.T) {
fh, err := os.Open("./testdata/collection.tar")
if err != nil {
t.Fatal(err)
}
str := NewTarStreamer(fh, []ExcludeFunc{ExcludeNonDirectories}, []Keyword{"type"})
if _, err := io.Copy(ioutil.Discard, str); err != nil && err != io.EOF {
t.Fatal(err)
}
if err := str.Close(); err != nil {
t.Fatal(err)
}
fh.Close()
// get DirectoryHierarcy struct from walking the tar archive
tdh, err := str.Hierarchy()
if err != nil {
t.Fatal(err)
}
for i := range tdh.Entries {
for _, keyval := range tdh.Entries[i].AllKeys() {
if tdh.Entries[i].Type == FullType || tdh.Entries[i].Type == RelativeType {
if keyval.Keyword() == "type" && keyval.Value() != "dir" {
t.Errorf("expected only directories, but %q is a %q", tdh.Entries[i].Name, keyval.Value())
}
}
}
}
}