test: Added tests for resolve command

Signed-off-by: Sajay Antony <sajaya@microsoft.com>

test/e2e/suite/command/resolve.go

@@ -0,0 +1,53 @@
+/*
+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 command
+
+import (
+	"fmt"
+	"strings"
+
+	. "github.com/onsi/ginkgo/v2"
+	"github.com/onsi/gomega"
+	"github.com/onsi/gomega/gbytes"
+	"oras.land/oras/test/e2e/internal/testdata/multi_arch"
+	. "oras.land/oras/test/e2e/internal/utils"
+)
+
+var _ = Describe("ORAS beginners:", Focus, func() {
+	When("running resolve command", func() {
+		It("should fail when no manifest reference provided", func() {
+			ORAS("resolve").ExpectFailure().MatchErrKeyWords("Error:").Exec()
+		})
+		It("should fail when provided manifest reference is not found", func() {
+			ORAS("resolve", RegistryRef(ZOTHost, ImageRepo, "i-dont-think-this-tag-exists")).ExpectFailure().MatchErrKeyWords("Error: failed to resolve digest:", "not found").Exec()
+		})
+		It("should resolve with with just digest", func() {
+			out := ORAS("resolve", RegistryRef(ZOTHost, ImageRepo, multi_arch.Digest)).Exec().Out
+			outString := string(out.Contents())
+			outString = strings.TrimSpace(outString)
+			gomega.Expect(outString).To(gomega.Equal(multi_arch.Digest))
+
+		})
+		It("should resolve with with the fully qualified reference", func() {
+			out := ORAS("resolve", "-l", RegistryRef(ZOTHost, ImageRepo, multi_arch.Tag)).Exec().Out
+			gomega.Expect(out).To(gbytes.Say(fmt.Sprintf("%s/%s@%s", ZOTHost, ImageRepo, multi_arch.Digest)))
+		})
+		It("should resolve with a fully qualified reference for a platform", func() {
+			out := ORAS("resolve", "--full-reference", "--platform", "linux/amd64", RegistryRef(ZOTHost, ImageRepo, multi_arch.Tag)).Exec().Out
+			gomega.Expect(out).To(gbytes.Say(fmt.Sprintf("%s/%s@%s", ZOTHost, ImageRepo, multi_arch.LinuxAMD64.Digest)))
+		})
+	})
+})