feat: show artifact type when pushing files

cmd/oras/internal/display/metadata/text/push.go

@@ -44,6 +44,10 @@ func (p *PushHandler) OnCopied(opts *option.Target) error {
 
 // OnCompleted is called after the push is completed.
 func (p *PushHandler) OnCompleted(root ocispec.Descriptor) error {
-	_, err := fmt.Fprintln(p.out, "Digest:", root.Digest)
+	_, err := fmt.Fprintln(p.out, "ArtifactType:", root.ArtifactType)
+	if err != nil {
+		return err
+	}
+	_, err = fmt.Fprintln(p.out, "Digest:", root.Digest)
 	return err
 }

cmd/oras/internal/display/metadata/text/push_test.go

@@ -0,0 +1,74 @@
+/*
+Copyright The ORAS Authors.
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package text
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"testing"
+
+	"github.com/opencontainers/go-digest"
+	ocispec "github.com/opencontainers/image-spec/specs-go/v1"
+)
+
+type errorWriter struct{}
+
+// Write implements the io.Writer interface and returns an error in Write.
+func (w *errorWriter) Write(p []byte) (n int, err error) {
+	return 0, fmt.Errorf("got an error")
+}
+
+func TestPushHandler_OnCompleted(t *testing.T) {
+	content := []byte("content")
+	tests := []struct {
+		name    string
+		out     io.Writer
+		root    ocispec.Descriptor
+		wantErr bool
+	}{
+		{
+			"good path",
+			&bytes.Buffer{},
+			ocispec.Descriptor{
+				MediaType: "example",
+				Digest:    digest.FromBytes(content),
+				Size:      int64(len(content)),
+			},
+			false,
+		},
+		{
+			"error path",
+			&errorWriter{},
+			ocispec.Descriptor{
+				MediaType: "example",
+				Digest:    digest.FromBytes(content),
+				Size:      int64(len(content)),
+			},
+			true,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			p := &PushHandler{
+				out: tt.out,
+			}
+			if err := p.OnCompleted(tt.root); (err != nil) != tt.wantErr {
+				t.Errorf("PushHandler.OnCompleted() error = %v, wantErr %v", err, tt.wantErr)
+			}
+		})
+	}
+}

test/e2e/suite/command/push.go

@@ -371,6 +371,25 @@ var _ = Describe("Remote registry users:", func() {
 			Expect(manifest.Config).Should(Equal(artifact.EmptyLayerJSON))
 		})
 
+		It("should output artifact type when push is complete for image-spec v1.1", func() {
+			repo := pushTestRepo("print-artifact-type-v1-1")
+			tempDir := PrepareTempFiles()
+
+			ORAS("push", RegistryRef(ZOTHost, repo, tag), foobar.FileBarName, "-v", "--image-spec", "v1.1").
+				MatchKeyWords("ArtifactType: ", "application/vnd.unknown.artifact.v1").
+				WithWorkDir(tempDir).Exec()
+		})
+
+		It("should output artifact type when push is complete for image-spec v1.0 when --config is used", func() {
+			repo := pushTestRepo("print-artifact-type-v1-0-config")
+			configType := "config/type"
+			tempDir := PrepareTempFiles()
+
+			ORAS("push", RegistryRef(ZOTHost, repo, tag), "--config", fmt.Sprintf("%s:%s", foobar.FileConfigName, configType), foobar.FileBarName, "-v", "--image-spec", "v1.0").
+				MatchKeyWords("ArtifactType: ", configType).
+				WithWorkDir(tempDir).Exec()
+		})
+
 		It("should push v1.1-rc.4 artifact", func() {
 			repo := pushTestRepo("v1.1-artifact")
 			tempDir := PrepareTempFiles()