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moby--moby/image/store_test.go

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package image
import (
"io/ioutil"
"os"
"testing"
"github.com/docker/distribution/digest"
"github.com/docker/docker/layer"
)
func TestRestore(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)
}
id1, err := fs.Set([]byte(`{"comment": "abc", "rootfs": {"type": "layers"}}`))
if err != nil {
t.Fatal(err)
}
_, err = fs.Set([]byte(`invalid`))
if err != nil {
t.Fatal(err)
}
id2, err := fs.Set([]byte(`{"comment": "def", "rootfs": {"type": "layers", "diff_ids": ["2c26b46b68ffc68ff99b453c1d30413413422d706483bfa0f98a5e886266e7ae"]}}`))
if err != nil {
t.Fatal(err)
}
err = fs.SetMetadata(id2, "parent", []byte(id1))
if err != nil {
t.Fatal(err)
}
is, err := NewImageStore(fs, &mockLayerGetReleaser{})
if err != nil {
t.Fatal(err)
}
imgs := is.Map()
if actual, expected := len(imgs), 2; actual != expected {
t.Fatalf("invalid images length, expected 2, got %q", len(imgs))
}
img1, err := is.Get(ID(id1))
if err != nil {
t.Fatal(err)
}
if actual, expected := img1.computedID, ID(id1); actual != expected {
t.Fatalf("invalid image ID: expected %q, got %q", expected, actual)
}
if actual, expected := img1.computedID.String(), string(id1); actual != expected {
t.Fatalf("invalid image ID string: expected %q, got %q", expected, actual)
}
img2, err := is.Get(ID(id2))
if err != nil {
t.Fatal(err)
}
if actual, expected := img1.Comment, "abc"; actual != expected {
t.Fatalf("invalid comment for image1: expected %q, got %q", expected, actual)
}
if actual, expected := img2.Comment, "def"; actual != expected {
t.Fatalf("invalid comment for image2: expected %q, got %q", expected, actual)
}
p, err := is.GetParent(ID(id1))
if err == nil {
t.Fatal("expected error for getting parent")
}
p, err = is.GetParent(ID(id2))
if err != nil {
t.Fatal(err)
}
if actual, expected := p, ID(id1); actual != expected {
t.Fatalf("invalid parent: expected %q, got %q", expected, actual)
}
children := is.Children(ID(id1))
if len(children) != 1 {
t.Fatalf("invalid children length: %q", len(children))
}
if actual, expected := children[0], ID(id2); actual != expected {
t.Fatalf("invalid child for id1: expected %q, got %q", expected, actual)
}
heads := is.Heads()
if actual, expected := len(heads), 1; actual != expected {
t.Fatalf("invalid images length: expected %q, got %q", expected, actual)
}
sid1, err := is.Search(string(id1)[:10])
if err != nil {
t.Fatal(err)
}
if actual, expected := sid1, ID(id1); actual != expected {
t.Fatalf("searched ID mismatch: expected %q, got %q", expected, actual)
}
sid1, err = is.Search(digest.Digest(id1).Hex()[:6])
if err != nil {
t.Fatal(err)
}
if actual, expected := sid1, ID(id1); actual != expected {
t.Fatalf("searched ID mismatch: expected %q, got %q", expected, actual)
}
invalidPattern := digest.Digest(id1).Hex()[1:6]
_, err = is.Search(invalidPattern)
if err == nil {
t.Fatalf("expected search for %q to fail", invalidPattern)
}
}
func TestAddDelete(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)
}
is, err := NewImageStore(fs, &mockLayerGetReleaser{})
if err != nil {
t.Fatal(err)
}
id1, err := is.Create([]byte(`{"comment": "abc", "rootfs": {"type": "layers", "diff_ids": ["2c26b46b68ffc68ff99b453c1d30413413422d706483bfa0f98a5e886266e7ae"]}}`))
if err != nil {
t.Fatal(err)
}
if actual, expected := id1, ID("sha256:8d25a9c45df515f9d0fe8e4a6b1c64dd3b965a84790ddbcc7954bb9bc89eb993"); actual != expected {
t.Fatalf("create ID mismatch: expected %q, got %q", expected, actual)
}
img, err := is.Get(id1)
if err != nil {
t.Fatal(err)
}
if actual, expected := img.Comment, "abc"; actual != expected {
t.Fatalf("invalid comment in image: expected %q, got %q", expected, actual)
}
id2, err := is.Create([]byte(`{"comment": "def", "rootfs": {"type": "layers", "diff_ids": ["2c26b46b68ffc68ff99b453c1d30413413422d706483bfa0f98a5e886266e7ae"]}}`))
if err != nil {
t.Fatal(err)
}
err = is.SetParent(id2, id1)
if err != nil {
t.Fatal(err)
}
pid1, err := is.GetParent(id2)
if err != nil {
t.Fatal(err)
}
if actual, expected := pid1, id1; actual != expected {
t.Fatalf("invalid parent for image: expected %q, got %q", expected, actual)
}
_, err = is.Delete(id1)
if err != nil {
t.Fatal(err)
}
_, err = is.Get(id1)
if err == nil {
t.Fatalf("expected get for deleted image %q to fail", id1)
}
_, err = is.Get(id2)
if err != nil {
t.Fatal(err)
}
pid1, err = is.GetParent(id2)
if err == nil {
t.Fatalf("expected parent check for image %q to fail, got %q", id2, pid1)
}
}
func TestSearchAfterDelete(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)
}
is, err := NewImageStore(fs, &mockLayerGetReleaser{})
if err != nil {
t.Fatal(err)
}
id, err := is.Create([]byte(`{"comment": "abc", "rootfs": {"type": "layers"}}`))
if err != nil {
t.Fatal(err)
}
id1, err := is.Search(string(id)[:15])
if err != nil {
t.Fatal(err)
}
if actual, expected := id1, id; expected != actual {
t.Fatalf("wrong id returned from search: expected %q, got %q", expected, actual)
}
if _, err := is.Delete(id); err != nil {
t.Fatal(err)
}
if _, err := is.Search(string(id)[:15]); err == nil {
t.Fatal("expected search after deletion to fail")
}
}
func TestParentReset(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)
}
is, err := NewImageStore(fs, &mockLayerGetReleaser{})
if err != nil {
t.Fatal(err)
}
id, err := is.Create([]byte(`{"comment": "abc1", "rootfs": {"type": "layers"}}`))
if err != nil {
t.Fatal(err)
}
id2, err := is.Create([]byte(`{"comment": "abc2", "rootfs": {"type": "layers"}}`))
if err != nil {
t.Fatal(err)
}
id3, err := is.Create([]byte(`{"comment": "abc3", "rootfs": {"type": "layers"}}`))
if err != nil {
t.Fatal(err)
}
if err := is.SetParent(id, id2); err != nil {
t.Fatal(err)
}
ids := is.Children(id2)
if actual, expected := len(ids), 1; expected != actual {
t.Fatalf("wrong number of children: %d, got %d", expected, actual)
}
if err := is.SetParent(id, id3); err != nil {
t.Fatal(err)
}
ids = is.Children(id2)
if actual, expected := len(ids), 0; expected != actual {
t.Fatalf("wrong number of children after parent reset: %d, got %d", expected, actual)
}
ids = is.Children(id3)
if actual, expected := len(ids), 1; expected != actual {
t.Fatalf("wrong number of children after parent reset: %d, got %d", expected, actual)
}
}
type mockLayerGetReleaser struct{}
func (ls *mockLayerGetReleaser) Get(layer.ChainID) (layer.Layer, error) {
return nil, nil
}
func (ls *mockLayerGetReleaser) Release(layer.Layer) ([]layer.Metadata, error) {
return nil, nil
}