package image import ( "io/ioutil" "os" "testing" "github.com/docker/docker/layer" "github.com/opencontainers/go-digest" ) 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 }