Add TTRPC client

Signed-off-by: Maksym Pavlenko <makpav@amazon.com>

client_ttrpc_test.go

@@ -0,0 +1,73 @@
+/*
+   Copyright The containerd 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 containerd
+
+import (
+	"context"
+	"testing"
+	"time"
+
+	v1 "github.com/containerd/containerd/api/services/ttrpc/events/v1"
+	"github.com/containerd/containerd/namespaces"
+	"github.com/containerd/ttrpc"
+	"github.com/gogo/protobuf/types"
+	"gotest.tools/assert"
+)
+
+func TestClientTTRPC_New(t *testing.T) {
+	client, err := NewTTRPC(address + ".ttrpc")
+	assert.NilError(t, err)
+
+	err = client.Close()
+	assert.NilError(t, err)
+}
+
+func TestClientTTRPC_Reconnect(t *testing.T) {
+	client, err := NewTTRPC(address + ".ttrpc")
+	assert.NilError(t, err)
+
+	err = client.Reconnect()
+	assert.NilError(t, err)
+
+	// Send test request to make sure its alive after reconnect
+	_, err = client.EventsService().Forward(context.Background(), &v1.ForwardRequest{
+		Envelope: &v1.Envelope{
+			Timestamp: time.Now(),
+			Namespace: namespaces.Default,
+			Topic:     "/test",
+			Event:     &types.Any{},
+		},
+	})
+	assert.NilError(t, err)
+
+	err = client.Close()
+	assert.NilError(t, err)
+}
+
+func TestClientTTRPC_Close(t *testing.T) {
+	client, err := NewTTRPC(address + ".ttrpc")
+	assert.NilError(t, err)
+
+	err = client.Close()
+	assert.NilError(t, err)
+
+	_, err = client.EventsService().Forward(context.Background(), &v1.ForwardRequest{Envelope: &v1.Envelope{}})
+	assert.Equal(t, err, ttrpc.ErrClosed)
+
+	err = client.Close()
+	assert.NilError(t, err)
+}