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moby--moby/image/fs_test.go

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package image
import (
"bytes"
"crypto/rand"
"crypto/sha256"
"encoding/hex"
"errors"
"io/ioutil"
"os"
"path/filepath"
"testing"
"github.com/docker/distribution/digest"
)
func TestFSGetSet(t *testing.T) {
tmpdir, err := ioutil.TempDir("", "images-fs-store")
if err != nil {
t.Fatal(err)
}
defer os.RemoveAll(tmpdir)
fs, err := NewFSStoreBackend(tmpdir)
if err != nil {
t.Fatal(err)
}
testGetSet(t, fs)
}
func TestFSGetInvalidData(t *testing.T) {
tmpdir, err := ioutil.TempDir("", "images-fs-store")
if err != nil {
t.Fatal(err)
}
defer os.RemoveAll(tmpdir)
fs, err := NewFSStoreBackend(tmpdir)
if err != nil {
t.Fatal(err)
}
id, err := fs.Set([]byte("foobar"))
if err != nil {
t.Fatal(err)
}
dgst := digest.Digest(id)
if err := ioutil.WriteFile(filepath.Join(tmpdir, contentDirName, string(dgst.Algorithm()), dgst.Hex()), []byte("foobar2"), 0600); err != nil {
t.Fatal(err)
}
_, err = fs.Get(id)
if err == nil {
t.Fatal("expected get to fail after data modification.")
}
}
func TestFSInvalidSet(t *testing.T) {
tmpdir, err := ioutil.TempDir("", "images-fs-store")
if err != nil {
t.Fatal(err)
}
defer os.RemoveAll(tmpdir)
fs, err := NewFSStoreBackend(tmpdir)
if err != nil {
t.Fatal(err)
}
id := digest.FromBytes([]byte("foobar"))
err = os.Mkdir(filepath.Join(tmpdir, contentDirName, string(id.Algorithm()), id.Hex()), 0700)
if err != nil {
t.Fatal(err)
}
_, err = fs.Set([]byte("foobar"))
if err == nil {
t.Fatal("expected error from invalid filesystem data.")
}
}
func TestFSInvalidRoot(t *testing.T) {
tmpdir, err := ioutil.TempDir("", "images-fs-store")
if err != nil {
t.Fatal(err)
}
defer os.RemoveAll(tmpdir)
tcases := []struct {
root, invalidFile string
}{
{"root", "root"},
{"root", "root/content"},
{"root", "root/metadata"},
}
for _, tc := range tcases {
root := filepath.Join(tmpdir, tc.root)
filePath := filepath.Join(tmpdir, tc.invalidFile)
err := os.MkdirAll(filepath.Dir(filePath), 0700)
if err != nil {
t.Fatal(err)
}
f, err := os.Create(filePath)
if err != nil {
t.Fatal(err)
}
f.Close()
_, err = NewFSStoreBackend(root)
if err == nil {
t.Fatalf("expected error from root %q and invalid file %q", tc.root, tc.invalidFile)
}
os.RemoveAll(root)
}
}
func testMetadataGetSet(t *testing.T, store StoreBackend) {
id, err := store.Set([]byte("foo"))
if err != nil {
t.Fatal(err)
}
id2, err := store.Set([]byte("bar"))
if err != nil {
t.Fatal(err)
}
tcases := []struct {
id digest.Digest
key string
value []byte
}{
{id, "tkey", []byte("tval1")},
{id, "tkey2", []byte("tval2")},
{id2, "tkey", []byte("tval3")},
}
for _, tc := range tcases {
err = store.SetMetadata(tc.id, tc.key, tc.value)
if err != nil {
t.Fatal(err)
}
actual, err := store.GetMetadata(tc.id, tc.key)
if err != nil {
t.Fatal(err)
}
if bytes.Compare(actual, tc.value) != 0 {
t.Fatalf("Metadata expected %q, got %q", tc.value, actual)
}
}
_, err = store.GetMetadata(id2, "tkey2")
if err == nil {
t.Fatal("expected error for getting metadata for unknown key")
}
id3 := digest.FromBytes([]byte("baz"))
err = store.SetMetadata(id3, "tkey", []byte("tval"))
if err == nil {
t.Fatal("expected error for setting metadata for unknown ID.")
}
_, err = store.GetMetadata(id3, "tkey")
if err == nil {
t.Fatal("expected error for getting metadata for unknown ID.")
}
}
func TestFSMetadataGetSet(t *testing.T) {
tmpdir, err := ioutil.TempDir("", "images-fs-store")
if err != nil {
t.Fatal(err)
}
defer os.RemoveAll(tmpdir)
fs, err := NewFSStoreBackend(tmpdir)
if err != nil {
t.Fatal(err)
}
testMetadataGetSet(t, fs)
}
func TestFSDelete(t *testing.T) {
tmpdir, err := ioutil.TempDir("", "images-fs-store")
if err != nil {
t.Fatal(err)
}
defer os.RemoveAll(tmpdir)
fs, err := NewFSStoreBackend(tmpdir)
if err != nil {
t.Fatal(err)
}
testDelete(t, fs)
}
func TestFSWalker(t *testing.T) {
tmpdir, err := ioutil.TempDir("", "images-fs-store")
if err != nil {
t.Fatal(err)
}
defer os.RemoveAll(tmpdir)
fs, err := NewFSStoreBackend(tmpdir)
if err != nil {
t.Fatal(err)
}
testWalker(t, fs)
}
func TestFSInvalidWalker(t *testing.T) {
tmpdir, err := ioutil.TempDir("", "images-fs-store")
if err != nil {
t.Fatal(err)
}
defer os.RemoveAll(tmpdir)
fs, err := NewFSStoreBackend(tmpdir)
if err != nil {
t.Fatal(err)
}
fooID, err := fs.Set([]byte("foo"))
if err != nil {
t.Fatal(err)
}
if err := ioutil.WriteFile(filepath.Join(tmpdir, contentDirName, "sha256/foobar"), []byte("foobar"), 0600); err != nil {
t.Fatal(err)
}
n := 0
err = fs.Walk(func(id digest.Digest) error {
if id != fooID {
t.Fatalf("invalid walker ID %q, expected %q", id, fooID)
}
n++
return nil
})
if err != nil {
t.Fatalf("invalid data should not have caused walker error, got %v", err)
}
if n != 1 {
t.Fatalf("expected 1 walk initialization, got %d", n)
}
}
func testGetSet(t *testing.T, store StoreBackend) {
type tcase struct {
input []byte
expected digest.Digest
}
tcases := []tcase{
{[]byte("foobar"), digest.Digest("sha256:c3ab8ff13720e8ad9047dd39466b3c8974e592c2fa383d4a3960714caef0c4f2")},
}
randomInput := make([]byte, 8*1024)
_, err := rand.Read(randomInput)
if err != nil {
t.Fatal(err)
}
// skipping use of digest pkg because it is used by the implementation
h := sha256.New()
_, err = h.Write(randomInput)
if err != nil {
t.Fatal(err)
}
tcases = append(tcases, tcase{
input: randomInput,
expected: digest.Digest("sha256:" + hex.EncodeToString(h.Sum(nil))),
})
for _, tc := range tcases {
id, err := store.Set([]byte(tc.input))
if err != nil {
t.Fatal(err)
}
if id != tc.expected {
t.Fatalf("expected ID %q, got %q", tc.expected, id)
}
}
for _, emptyData := range [][]byte{nil, {}} {
_, err := store.Set(emptyData)
if err == nil {
t.Fatal("expected error for nil input.")
}
}
for _, tc := range tcases {
data, err := store.Get(tc.expected)
if err != nil {
t.Fatal(err)
}
if bytes.Compare(data, tc.input) != 0 {
t.Fatalf("expected data %q, got %q", tc.input, data)
}
}
for _, key := range []digest.Digest{"foobar:abc", "sha256:abc", "sha256:c3ab8ff13720e8ad9047dd39466b3c8974e592c2fa383d4a3960714caef0c4f2a"} {
_, err := store.Get(key)
if err == nil {
t.Fatalf("expected error for ID %q.", key)
}
}
}
func testDelete(t *testing.T, store StoreBackend) {
id, err := store.Set([]byte("foo"))
if err != nil {
t.Fatal(err)
}
id2, err := store.Set([]byte("bar"))
if err != nil {
t.Fatal(err)
}
err = store.Delete(id)
if err != nil {
t.Fatal(err)
}
_, err = store.Get(id)
if err == nil {
t.Fatalf("expected getting deleted item %q to fail", id)
}
_, err = store.Get(id2)
if err != nil {
t.Fatal(err)
}
err = store.Delete(id2)
if err != nil {
t.Fatal(err)
}
_, err = store.Get(id2)
if err == nil {
t.Fatalf("expected getting deleted item %q to fail", id2)
}
}
func testWalker(t *testing.T, store StoreBackend) {
id, err := store.Set([]byte("foo"))
if err != nil {
t.Fatal(err)
}
id2, err := store.Set([]byte("bar"))
if err != nil {
t.Fatal(err)
}
tcases := make(map[digest.Digest]struct{})
tcases[id] = struct{}{}
tcases[id2] = struct{}{}
n := 0
err = store.Walk(func(id digest.Digest) error {
delete(tcases, id)
n++
return nil
})
if err != nil {
t.Fatal(err)
}
if n != 2 {
t.Fatalf("expected 2 walk initializations, got %d", n)
}
if len(tcases) != 0 {
t.Fatalf("expected empty unwalked set, got %+v", tcases)
}
// stop on error
tcases = make(map[digest.Digest]struct{})
tcases[id] = struct{}{}
err = store.Walk(func(id digest.Digest) error {
return errors.New("")
})
if err == nil {
t.Fatalf("expected error from walker.")
}
}