test: add test case to cover lock restful APIs

Signed-off-by: Benjamin Wang <wachao@vmware.com>

tests/e2e/v3_curl_lock_test.go

@@ -0,0 +1,57 @@
+// Copyright 2023 The etcd 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 e2e
+
+import (
+	"encoding/json"
+	"fmt"
+
+	"testing"
+
+	"github.com/stretchr/testify/require"
+
+	"go.etcd.io/etcd/pkg/v3/expect"
+	"go.etcd.io/etcd/server/v3/etcdserver/api/v3lock/v3lockpb"
+	"go.etcd.io/etcd/tests/v3/framework/e2e"
+)
+
+func TestCurlV3LockOperations(t *testing.T) {
+	testCtl(t, testCurlV3LockOperations, withCfg(*e2e.NewConfig(e2e.WithClusterSize(1))))
+}
+
+func testCurlV3LockOperations(cx ctlCtx) {
+	// lock
+	lockReq, err := json.Marshal(&v3lockpb.LockRequest{Name: []byte("lock1")})
+	require.NoError(cx.t, err)
+
+	clus := cx.epc
+	args := e2e.CURLPrefixArgsCluster(clus.Cfg, clus.Procs[0], "POST", e2e.CURLReq{
+		Endpoint: "/v3/lock/lock",
+		Value:    string(lockReq),
+	})
+	resp, err := runCommandAndReadJsonOutput(args)
+	require.NoError(cx.t, err)
+	key, ok := resp["key"]
+	require.True(cx.t, ok)
+
+	// unlock
+	if err = e2e.CURLPost(cx.epc, e2e.CURLReq{
+		Endpoint: "/v3/lock/unlock",
+		Value:    fmt.Sprintf(`{"key": "%v"}`, key),
+		Expected: expect.ExpectedResponse{Value: "revision"},
+	}); err != nil {
+		cx.t.Fatalf("testCurlV3LockOperations failed to execute unlock (%v)", err)
+	}
+}