tests/integration: Move of naming/snapshot clientv3 tests (and yaml reference)

path change in clientv3/yaml/config_test

git mv clientv3/naming/grpc_test.go         tests/integration/clientv3/grpc_test.go
git mv clientv3/snapshot/*_test.go          tests/integration/snapshot
git mv clientv3/{main_test.go,example_*.go} tests/integration/clientv3/examples/

tests/integration/clientv3/examples/example_test.go

@@ -0,0 +1,70 @@
+// Copyright 2016 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 clientv3_test
+
+import (
+	"context"
+	"go.etcd.io/etcd/v3/clientv3"
+	"go.etcd.io/etcd/v3/pkg/transport"
+	"log"
+)
+
+func ExampleConfig_insecure() {
+	cli, err := clientv3.New(clientv3.Config{
+		Endpoints:   endpoints,
+		DialTimeout: dialTimeout,
+	})
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer cli.Close() // make sure to close the client
+
+	_, err = cli.Put(context.TODO(), "foo", "bar")
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	// Without the line below the test is not being executed
+
+	// Output:
+}
+
+func ExampleConfig_withTLS() {
+	tlsInfo := transport.TLSInfo{
+		CertFile:      "/tmp/test-certs/test-name-1.pem",
+		KeyFile:       "/tmp/test-certs/test-name-1-key.pem",
+		TrustedCAFile: "/tmp/test-certs/trusted-ca.pem",
+	}
+	tlsConfig, err := tlsInfo.ClientConfig()
+	if err != nil {
+		log.Fatal(err)
+	}
+	cli, err := clientv3.New(clientv3.Config{
+		Endpoints:   endpoints,
+		DialTimeout: dialTimeout,
+		TLS:         tlsConfig,
+	})
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer cli.Close() // make sure to close the client
+
+	_, err = cli.Put(context.TODO(), "foo", "bar")
+	if err != nil {
+		log.Fatal(err)
+	}
+	// Without the line below the test is not being executed
+	// Output:
+}