From 578b784dcdca22cd657a521656b7ae9b2c496312 Mon Sep 17 00:00:00 2001
From: Ivan Valdes <ivan@vald.es>
Date: Wed, 6 Mar 2024 16:22:09 -0800
Subject: [PATCH] client: address golangci var-naming issues

Signed-off-by: Ivan Valdes <ivan@vald.es>
---
 client/pkg/logutil/log_format.go              | 12 +++--
 client/pkg/logutil/log_format_test.go         |  4 +-
 client/pkg/tlsutil/cipher_suites_test.go      |  6 +--
 client/pkg/verify/verify.go                   | 26 +++++-----
 client/v3/client.go                           |  6 +--
 client/v3/internal/endpoint/endpoint.go       | 26 +++++-----
 client/v3/internal/endpoint/endpoint_test.go  | 52 +++++++++----------
 client/v3/mock/mockserver/mockserver.go       | 14 ++---
 client/v3/retry_interceptor.go                |  4 +-
 client/v3/watch.go                            | 52 +++++++++----------
 .../concurrency/example_election_test.go      |  4 +-
 .../concurrency/example_mutex_test.go         |  8 +--
 .../clientv3/concurrency/example_stm_test.go  |  4 +-
 13 files changed, 111 insertions(+), 107 deletions(-)

diff --git a/client/pkg/logutil/log_format.go b/client/pkg/logutil/log_format.go
index 494ab33fb97..286d385ba39 100644
--- a/client/pkg/logutil/log_format.go
+++ b/client/pkg/logutil/log_format.go
@@ -17,19 +17,23 @@ package logutil
 import "fmt"
 
 const (
-	JsonLogFormat    = "json"
+	JSONLogFormat    = "json"
 	ConsoleLogFormat = "console"
+	//revive:disable:var-naming
+	// Deprecated: Please use JSONLogFormat.
+	JsonLogFormat = JSONLogFormat
+	//revive:enable:var-naming
 )
 
-var DefaultLogFormat = JsonLogFormat
+var DefaultLogFormat = JSONLogFormat
 
 // ConvertToZapFormat converts and validated log format string.
 func ConvertToZapFormat(format string) (string, error) {
 	switch format {
 	case ConsoleLogFormat:
 		return ConsoleLogFormat, nil
-	case JsonLogFormat:
-		return JsonLogFormat, nil
+	case JSONLogFormat:
+		return JSONLogFormat, nil
 	case "":
 		return DefaultLogFormat, nil
 	default:
diff --git a/client/pkg/logutil/log_format_test.go b/client/pkg/logutil/log_format_test.go
index 3c17061db7e..7b77e256d33 100644
--- a/client/pkg/logutil/log_format_test.go
+++ b/client/pkg/logutil/log_format_test.go
@@ -24,9 +24,9 @@ func TestLogFormat(t *testing.T) {
 		want        string
 		errExpected bool
 	}{
-		{"json", JsonLogFormat, false},
+		{"json", JSONLogFormat, false},
 		{"console", ConsoleLogFormat, false},
-		{"", JsonLogFormat, false},
+		{"", JSONLogFormat, false},
 		{"konsole", "", true},
 	}
 
diff --git a/client/pkg/tlsutil/cipher_suites_test.go b/client/pkg/tlsutil/cipher_suites_test.go
index a17b46c2fee..e94c3ab0f56 100644
--- a/client/pkg/tlsutil/cipher_suites_test.go
+++ b/client/pkg/tlsutil/cipher_suites_test.go
@@ -26,13 +26,13 @@ func TestGetCipherSuite_not_existing(t *testing.T) {
 	}
 }
 
-func CipherSuiteExpectedToExist(tb testing.TB, cipher string, expectedId uint16) {
+func CipherSuiteExpectedToExist(tb testing.TB, cipher string, expectedID uint16) {
 	vid, ok := GetCipherSuite(cipher)
 	if !ok {
 		tb.Errorf("Expected %v cipher to exist", cipher)
 	}
-	if vid != expectedId {
-		tb.Errorf("For %v expected=%v found=%v", cipher, expectedId, vid)
+	if vid != expectedID {
+		tb.Errorf("For %v expected=%v found=%v", cipher, expectedID, vid)
 	}
 }
 
diff --git a/client/pkg/verify/verify.go b/client/pkg/verify/verify.go
index dcc93f471ec..a7b2097bed9 100644
--- a/client/pkg/verify/verify.go
+++ b/client/pkg/verify/verify.go
@@ -20,54 +20,54 @@ import (
 	"strings"
 )
 
-const ENV_VERIFY = "ETCD_VERIFY"
+const envVerify = "ETCD_VERIFY"
 
 type VerificationType string
 
 const (
-	ENV_VERIFY_VALUE_ALL    VerificationType = "all"
-	ENV_VERIFY_VALUE_ASSERT VerificationType = "assert"
+	envVerifyValueAll    VerificationType = "all"
+	envVerifyValueAssert VerificationType = "assert"
 )
 
 func getEnvVerify() string {
-	return strings.ToLower(os.Getenv(ENV_VERIFY))
+	return strings.ToLower(os.Getenv(envVerify))
 }
 
 func IsVerificationEnabled(verification VerificationType) bool {
 	env := getEnvVerify()
-	return env == string(ENV_VERIFY_VALUE_ALL) || env == strings.ToLower(string(verification))
+	return env == string(envVerifyValueAll) || env == strings.ToLower(string(verification))
 }
 
-// EnableVerifications sets `ENV_VERIFY` and returns a function that
+// EnableVerifications sets `envVerify` and returns a function that
 // can be used to bring the original settings.
 func EnableVerifications(verification VerificationType) func() {
 	previousEnv := getEnvVerify()
-	os.Setenv(ENV_VERIFY, string(verification))
+	os.Setenv(envVerify, string(verification))
 	return func() {
-		os.Setenv(ENV_VERIFY, previousEnv)
+		os.Setenv(envVerify, previousEnv)
 	}
 }
 
 // EnableAllVerifications enables verification and returns a function
 // that can be used to bring the original settings.
 func EnableAllVerifications() func() {
-	return EnableVerifications(ENV_VERIFY_VALUE_ALL)
+	return EnableVerifications(envVerifyValueAll)
 }
 
-// DisableVerifications unsets `ENV_VERIFY` and returns a function that
+// DisableVerifications unsets `envVerify` and returns a function that
 // can be used to bring the original settings.
 func DisableVerifications() func() {
 	previousEnv := getEnvVerify()
-	os.Unsetenv(ENV_VERIFY)
+	os.Unsetenv(envVerify)
 	return func() {
-		os.Setenv(ENV_VERIFY, previousEnv)
+		os.Setenv(envVerify, previousEnv)
 	}
 }
 
 // Verify performs verification if the assertions are enabled.
 // In the default setup running in tests and skipped in the production code.
 func Verify(f func()) {
-	if IsVerificationEnabled(ENV_VERIFY_VALUE_ASSERT) {
+	if IsVerificationEnabled(envVerifyValueAssert) {
 		f()
 	}
 }
diff --git a/client/v3/client.go b/client/v3/client.go
index c28f53c9d40..e6d2ae38675 100644
--- a/client/v3/client.go
+++ b/client/v3/client.go
@@ -345,11 +345,11 @@ func authority(endpoint string) string {
 func (c *Client) credentialsForEndpoint(ep string) grpccredentials.TransportCredentials {
 	r := endpoint.RequiresCredentials(ep)
 	switch r {
-	case endpoint.CREDS_DROP:
+	case endpoint.CredsDrop:
 		return nil
-	case endpoint.CREDS_OPTIONAL:
+	case endpoint.CredsOptional:
 		return c.creds
-	case endpoint.CREDS_REQUIRE:
+	case endpoint.CredsRequire:
 		if c.creds != nil {
 			return c.creds
 		}
diff --git a/client/v3/internal/endpoint/endpoint.go b/client/v3/internal/endpoint/endpoint.go
index 35a3fe8c337..2c45b5e3067 100644
--- a/client/v3/internal/endpoint/endpoint.go
+++ b/client/v3/internal/endpoint/endpoint.go
@@ -25,12 +25,12 @@ import (
 type CredsRequirement int
 
 const (
-	// CREDS_REQUIRE - Credentials/certificate required for thi type of connection.
-	CREDS_REQUIRE CredsRequirement = iota
-	// CREDS_DROP - Credentials/certificate not needed and should get ignored.
-	CREDS_DROP
-	// CREDS_OPTIONAL - Credentials/certificate might be used if supplied
-	CREDS_OPTIONAL
+	// CredsRequire - Credentials/certificate required for thi type of connection.
+	CredsRequire CredsRequirement = iota
+	// CredsDrop - Credentials/certificate not needed and should get ignored.
+	CredsDrop
+	// CredsOptional - Credentials/certificate might be used if supplied
+	CredsOptional
 )
 
 func extractHostFromHostPort(ep string) string {
@@ -54,20 +54,20 @@ func mustSplit2(s, sep string) (string, string) {
 func schemeToCredsRequirement(schema string) CredsRequirement {
 	switch schema {
 	case "https", "unixs":
-		return CREDS_REQUIRE
+		return CredsRequire
 	case "http":
-		return CREDS_DROP
+		return CredsDrop
 	case "unix":
 		// Preserving previous behavior from:
 		// https://github.com/etcd-io/etcd/blob/dae29bb719dd69dc119146fc297a0628fcc1ccf8/client/v3/client.go#L212
 		// that likely was a bug due to missing 'fallthrough'.
 		// At the same time it seems legit to let the users decide whether they
 		// want credential control or not (and 'unixs' schema is not a standard thing).
-		return CREDS_OPTIONAL
+		return CredsOptional
 	case "":
-		return CREDS_OPTIONAL
+		return CredsOptional
 	default:
-		return CREDS_OPTIONAL
+		return CredsOptional
 	}
 }
 
@@ -106,7 +106,7 @@ func translateEndpoint(ep string) (addr string, serverName string, requireCreds
 	if strings.Contains(ep, "://") {
 		url, err := url.Parse(ep)
 		if err != nil {
-			return ep, ep, CREDS_OPTIONAL
+			return ep, ep, CredsOptional
 		}
 		if url.Scheme == "http" || url.Scheme == "https" {
 			return url.Host, url.Host, schemeToCredsRequirement(url.Scheme)
@@ -114,7 +114,7 @@ func translateEndpoint(ep string) (addr string, serverName string, requireCreds
 		return ep, url.Host, schemeToCredsRequirement(url.Scheme)
 	}
 	// Handles plain addresses like 10.0.0.44:437.
-	return ep, ep, CREDS_OPTIONAL
+	return ep, ep, CredsOptional
 }
 
 // RequiresCredentials returns whether given endpoint requires
diff --git a/client/v3/internal/endpoint/endpoint_test.go b/client/v3/internal/endpoint/endpoint_test.go
index 7de9226ff19..95e8c73954c 100644
--- a/client/v3/internal/endpoint/endpoint_test.go
+++ b/client/v3/internal/endpoint/endpoint_test.go
@@ -25,38 +25,38 @@ func Test_interpret(t *testing.T) {
 		wantServerName    string
 		wantRequiresCreds CredsRequirement
 	}{
-		{"127.0.0.1", "127.0.0.1", "127.0.0.1", CREDS_OPTIONAL},
-		{"localhost", "localhost", "localhost", CREDS_OPTIONAL},
-		{"localhost:8080", "localhost:8080", "localhost:8080", CREDS_OPTIONAL},
+		{"127.0.0.1", "127.0.0.1", "127.0.0.1", CredsOptional},
+		{"localhost", "localhost", "localhost", CredsOptional},
+		{"localhost:8080", "localhost:8080", "localhost:8080", CredsOptional},
 
-		{"unix:127.0.0.1", "unix:127.0.0.1", "127.0.0.1", CREDS_OPTIONAL},
-		{"unix:127.0.0.1:8080", "unix:127.0.0.1:8080", "127.0.0.1:8080", CREDS_OPTIONAL},
+		{"unix:127.0.0.1", "unix:127.0.0.1", "127.0.0.1", CredsOptional},
+		{"unix:127.0.0.1:8080", "unix:127.0.0.1:8080", "127.0.0.1:8080", CredsOptional},
 
-		{"unix://127.0.0.1", "unix:127.0.0.1", "127.0.0.1", CREDS_OPTIONAL},
-		{"unix://127.0.0.1:8080", "unix:127.0.0.1:8080", "127.0.0.1:8080", CREDS_OPTIONAL},
+		{"unix://127.0.0.1", "unix:127.0.0.1", "127.0.0.1", CredsOptional},
+		{"unix://127.0.0.1:8080", "unix:127.0.0.1:8080", "127.0.0.1:8080", CredsOptional},
 
-		{"unixs:127.0.0.1", "unix:127.0.0.1", "127.0.0.1", CREDS_REQUIRE},
-		{"unixs:127.0.0.1:8080", "unix:127.0.0.1:8080", "127.0.0.1:8080", CREDS_REQUIRE},
-		{"unixs://127.0.0.1", "unix:127.0.0.1", "127.0.0.1", CREDS_REQUIRE},
-		{"unixs://127.0.0.1:8080", "unix:127.0.0.1:8080", "127.0.0.1:8080", CREDS_REQUIRE},
+		{"unixs:127.0.0.1", "unix:127.0.0.1", "127.0.0.1", CredsRequire},
+		{"unixs:127.0.0.1:8080", "unix:127.0.0.1:8080", "127.0.0.1:8080", CredsRequire},
+		{"unixs://127.0.0.1", "unix:127.0.0.1", "127.0.0.1", CredsRequire},
+		{"unixs://127.0.0.1:8080", "unix:127.0.0.1:8080", "127.0.0.1:8080", CredsRequire},
 
-		{"http://127.0.0.1", "127.0.0.1", "127.0.0.1", CREDS_DROP},
-		{"http://127.0.0.1:8080", "127.0.0.1:8080", "127.0.0.1:8080", CREDS_DROP},
-		{"https://127.0.0.1", "127.0.0.1", "127.0.0.1", CREDS_REQUIRE},
-		{"https://127.0.0.1:8080", "127.0.0.1:8080", "127.0.0.1:8080", CREDS_REQUIRE},
-		{"https://localhost:20000", "localhost:20000", "localhost:20000", CREDS_REQUIRE},
+		{"http://127.0.0.1", "127.0.0.1", "127.0.0.1", CredsDrop},
+		{"http://127.0.0.1:8080", "127.0.0.1:8080", "127.0.0.1:8080", CredsDrop},
+		{"https://127.0.0.1", "127.0.0.1", "127.0.0.1", CredsRequire},
+		{"https://127.0.0.1:8080", "127.0.0.1:8080", "127.0.0.1:8080", CredsRequire},
+		{"https://localhost:20000", "localhost:20000", "localhost:20000", CredsRequire},
 
-		{"unix:///tmp/abc", "unix:///tmp/abc", "abc", CREDS_OPTIONAL},
-		{"unixs:///tmp/abc", "unix:///tmp/abc", "abc", CREDS_REQUIRE},
-		{"unix:///tmp/abc:1234", "unix:///tmp/abc:1234", "abc:1234", CREDS_OPTIONAL},
-		{"unixs:///tmp/abc:1234", "unix:///tmp/abc:1234", "abc:1234", CREDS_REQUIRE},
-		{"etcd.io", "etcd.io", "etcd.io", CREDS_OPTIONAL},
-		{"http://etcd.io/abc", "etcd.io", "etcd.io", CREDS_DROP},
-		{"dns://something-other", "dns://something-other", "something-other", CREDS_OPTIONAL},
+		{"unix:///tmp/abc", "unix:///tmp/abc", "abc", CredsOptional},
+		{"unixs:///tmp/abc", "unix:///tmp/abc", "abc", CredsRequire},
+		{"unix:///tmp/abc:1234", "unix:///tmp/abc:1234", "abc:1234", CredsOptional},
+		{"unixs:///tmp/abc:1234", "unix:///tmp/abc:1234", "abc:1234", CredsRequire},
+		{"etcd.io", "etcd.io", "etcd.io", CredsOptional},
+		{"http://etcd.io/abc", "etcd.io", "etcd.io", CredsDrop},
+		{"dns://something-other", "dns://something-other", "something-other", CredsOptional},
 
-		{"http://[2001:db8:1f70::999:de8:7648:6e8]:100/", "[2001:db8:1f70::999:de8:7648:6e8]:100", "[2001:db8:1f70::999:de8:7648:6e8]:100", CREDS_DROP},
-		{"[2001:db8:1f70::999:de8:7648:6e8]:100", "[2001:db8:1f70::999:de8:7648:6e8]:100", "[2001:db8:1f70::999:de8:7648:6e8]:100", CREDS_OPTIONAL},
-		{"unix:unexpected-file_name#123$456", "unix:unexpected-file_name#123$456", "unexpected-file_name#123$456", CREDS_OPTIONAL},
+		{"http://[2001:db8:1f70::999:de8:7648:6e8]:100/", "[2001:db8:1f70::999:de8:7648:6e8]:100", "[2001:db8:1f70::999:de8:7648:6e8]:100", CredsDrop},
+		{"[2001:db8:1f70::999:de8:7648:6e8]:100", "[2001:db8:1f70::999:de8:7648:6e8]:100", "[2001:db8:1f70::999:de8:7648:6e8]:100", CredsOptional},
+		{"unix:unexpected-file_name#123$456", "unix:unexpected-file_name#123$456", "unexpected-file_name#123$456", CredsOptional},
 	}
 	for _, tt := range tests {
 		t.Run("Interpret_"+tt.endpoint, func(t *testing.T) {
diff --git a/client/v3/mock/mockserver/mockserver.go b/client/v3/mock/mockserver/mockserver.go
index 59a95388bf0..7d14e027810 100644
--- a/client/v3/mock/mockserver/mockserver.go
+++ b/client/v3/mock/mockserver/mockserver.go
@@ -32,7 +32,7 @@ type MockServer struct {
 	ln         net.Listener
 	Network    string
 	Address    string
-	GrpcServer *grpc.Server
+	GRPCServer *grpc.Server
 }
 
 func (ms *MockServer) ResolverAddress() resolver.Address {
@@ -63,7 +63,7 @@ func StartMockServers(count int) (ms *MockServers, err error) {
 func StartMockServersOnNetwork(count int, network string) (ms *MockServers, err error) {
 	switch network {
 	case "tcp":
-		return startMockServersTcp(count)
+		return startMockServersTCP(count)
 	case "unix":
 		return startMockServersUnix(count)
 	default:
@@ -71,7 +71,7 @@ func StartMockServersOnNetwork(count int, network string) (ms *MockServers, err
 	}
 }
 
-func startMockServersTcp(count int) (ms *MockServers, err error) {
+func startMockServersTCP(count int) (ms *MockServers, err error) {
 	addrs := make([]string, 0, count)
 	for i := 0; i < count; i++ {
 		addrs = append(addrs, "localhost:0")
@@ -133,12 +133,12 @@ func (ms *MockServers) StartAt(idx int) (err error) {
 	svr := grpc.NewServer()
 	pb.RegisterKVServer(svr, &mockKVServer{})
 	pb.RegisterLeaseServer(svr, &mockLeaseServer{})
-	ms.Servers[idx].GrpcServer = svr
+	ms.Servers[idx].GRPCServer = svr
 
 	ms.wg.Add(1)
 	go func(svr *grpc.Server, l net.Listener) {
 		svr.Serve(l)
-	}(ms.Servers[idx].GrpcServer, ms.Servers[idx].ln)
+	}(ms.Servers[idx].GRPCServer, ms.Servers[idx].ln)
 	return nil
 }
 
@@ -151,8 +151,8 @@ func (ms *MockServers) StopAt(idx int) {
 		return
 	}
 
-	ms.Servers[idx].GrpcServer.Stop()
-	ms.Servers[idx].GrpcServer = nil
+	ms.Servers[idx].GRPCServer.Stop()
+	ms.Servers[idx].GRPCServer = nil
 	ms.Servers[idx].ln = nil
 	ms.wg.Done()
 }
diff --git a/client/v3/retry_interceptor.go b/client/v3/retry_interceptor.go
index 2f1658d8de6..b15a40bf6fd 100644
--- a/client/v3/retry_interceptor.go
+++ b/client/v3/retry_interceptor.go
@@ -311,7 +311,7 @@ func waitRetryBackoff(ctx context.Context, attempt uint, callOpts *options) erro
 		select {
 		case <-ctx.Done():
 			timer.Stop()
-			return contextErrToGrpcErr(ctx.Err())
+			return contextErrToGRPCErr(ctx.Err())
 		case <-timer.C:
 		}
 	}
@@ -349,7 +349,7 @@ func isContextError(err error) bool {
 	return status.Code(err) == codes.DeadlineExceeded || status.Code(err) == codes.Canceled
 }
 
-func contextErrToGrpcErr(err error) error {
+func contextErrToGRPCErr(err error) error {
 	switch err {
 	case context.DeadlineExceeded:
 		return status.Errorf(codes.DeadlineExceeded, err.Error())
diff --git a/client/v3/watch.go b/client/v3/watch.go
index db12aff299c..14ddcb920e1 100644
--- a/client/v3/watch.go
+++ b/client/v3/watch.go
@@ -149,12 +149,12 @@ type watcher struct {
 	mu sync.Mutex
 
 	// streams holds all the active grpc streams keyed by ctx value.
-	streams map[string]*watchGrpcStream
+	streams map[string]*watchGRPCStream
 	lg      *zap.Logger
 }
 
-// watchGrpcStream tracks all watch resources attached to a single grpc stream.
-type watchGrpcStream struct {
+// watchGRPCStream tracks all watch resources attached to a single grpc stream.
+type watchGRPCStream struct {
 	owner    *watcher
 	remote   pb.WatchClient
 	callOpts []grpc.CallOption
@@ -251,7 +251,7 @@ func NewWatcher(c *Client) Watcher {
 func NewWatchFromWatchClient(wc pb.WatchClient, c *Client) Watcher {
 	w := &watcher{
 		remote:  wc,
-		streams: make(map[string]*watchGrpcStream),
+		streams: make(map[string]*watchGRPCStream),
 	}
 	if c != nil {
 		w.callOpts = c.callOpts
@@ -271,9 +271,9 @@ func (vc *valCtx) Deadline() (time.Time, bool) { return zeroTime, false }
 func (vc *valCtx) Done() <-chan struct{}       { return valCtxCh }
 func (vc *valCtx) Err() error                  { return nil }
 
-func (w *watcher) newWatcherGrpcStream(inctx context.Context) *watchGrpcStream {
+func (w *watcher) newWatcherGRPCStream(inctx context.Context) *watchGRPCStream {
 	ctx, cancel := context.WithCancel(&valCtx{inctx})
-	wgs := &watchGrpcStream{
+	wgs := &watchGRPCStream{
 		owner:      w,
 		remote:     w.remote,
 		callOpts:   w.callOpts,
@@ -334,7 +334,7 @@ func (w *watcher) Watch(ctx context.Context, key string, opts ...OpOption) Watch
 		}
 		wgs := w.streams[ctxKey]
 		if wgs == nil {
-			wgs = w.newWatcherGrpcStream(ctx)
+			wgs = w.newWatcherGRPCStream(ctx)
 			w.streams[ctxKey] = wgs
 		}
 		donec := wgs.donec
@@ -412,7 +412,7 @@ func (w *watcher) RequestProgress(ctx context.Context) (err error) {
 	}
 	wgs := w.streams[ctxKey]
 	if wgs == nil {
-		wgs = w.newWatcherGrpcStream(ctx)
+		wgs = w.newWatcherGRPCStream(ctx)
 		w.streams[ctxKey] = wgs
 	}
 	donec := wgs.donec
@@ -435,7 +435,7 @@ func (w *watcher) RequestProgress(ctx context.Context) (err error) {
 	}
 }
 
-func (w *watchGrpcStream) close() (err error) {
+func (w *watchGRPCStream) close() (err error) {
 	w.cancel()
 	<-w.donec
 	select {
@@ -445,7 +445,7 @@ func (w *watchGrpcStream) close() (err error) {
 	return toErr(w.ctx, err)
 }
 
-func (w *watcher) closeStream(wgs *watchGrpcStream) {
+func (w *watcher) closeStream(wgs *watchGRPCStream) {
 	w.mu.Lock()
 	close(wgs.donec)
 	wgs.cancel()
@@ -455,7 +455,7 @@ func (w *watcher) closeStream(wgs *watchGrpcStream) {
 	w.mu.Unlock()
 }
 
-func (w *watchGrpcStream) addSubstream(resp *pb.WatchResponse, ws *watcherStream) {
+func (w *watchGRPCStream) addSubstream(resp *pb.WatchResponse, ws *watcherStream) {
 	// check watch ID for backward compatibility (<= v3.3)
 	if resp.WatchId == InvalidWatchID || (resp.Canceled && resp.CancelReason != "") {
 		w.closeErr = v3rpc.Error(errors.New(resp.CancelReason))
@@ -467,7 +467,7 @@ func (w *watchGrpcStream) addSubstream(resp *pb.WatchResponse, ws *watcherStream
 	w.substreams[ws.id] = ws
 }
 
-func (w *watchGrpcStream) sendCloseSubstream(ws *watcherStream, resp *WatchResponse) {
+func (w *watchGRPCStream) sendCloseSubstream(ws *watcherStream, resp *WatchResponse) {
 	select {
 	case ws.outc <- *resp:
 	case <-ws.initReq.ctx.Done():
@@ -476,7 +476,7 @@ func (w *watchGrpcStream) sendCloseSubstream(ws *watcherStream, resp *WatchRespo
 	close(ws.outc)
 }
 
-func (w *watchGrpcStream) closeSubstream(ws *watcherStream) {
+func (w *watchGRPCStream) closeSubstream(ws *watcherStream) {
 	// send channel response in case stream was never established
 	select {
 	case ws.initReq.retc <- ws.outc:
@@ -501,7 +501,7 @@ func (w *watchGrpcStream) closeSubstream(ws *watcherStream) {
 }
 
 // run is the root of the goroutines for managing a watcher client
-func (w *watchGrpcStream) run() {
+func (w *watchGRPCStream) run() {
 	var wc pb.Watch_WatchClient
 	var closeErr error
 
@@ -699,7 +699,7 @@ func (w *watchGrpcStream) run() {
 
 // nextResume chooses the next resuming to register with the grpc stream. Abandoned
 // streams are marked as nil in the queue since the head must wait for its inflight registration.
-func (w *watchGrpcStream) nextResume() *watcherStream {
+func (w *watchGRPCStream) nextResume() *watcherStream {
 	for len(w.resuming) != 0 {
 		if w.resuming[0] != nil {
 			return w.resuming[0]
@@ -710,7 +710,7 @@ func (w *watchGrpcStream) nextResume() *watcherStream {
 }
 
 // dispatchEvent sends a WatchResponse to the appropriate watcher stream
-func (w *watchGrpcStream) dispatchEvent(pbresp *pb.WatchResponse) bool {
+func (w *watchGRPCStream) dispatchEvent(pbresp *pb.WatchResponse) bool {
 	events := make([]*Event, len(pbresp.Events))
 	for i, ev := range pbresp.Events {
 		events[i] = (*Event)(ev)
@@ -736,7 +736,7 @@ func (w *watchGrpcStream) dispatchEvent(pbresp *pb.WatchResponse) bool {
 }
 
 // broadcastResponse send a watch response to all watch substreams.
-func (w *watchGrpcStream) broadcastResponse(wr *WatchResponse) bool {
+func (w *watchGRPCStream) broadcastResponse(wr *WatchResponse) bool {
 	for _, ws := range w.substreams {
 		select {
 		case ws.recvc <- wr:
@@ -747,8 +747,8 @@ func (w *watchGrpcStream) broadcastResponse(wr *WatchResponse) bool {
 }
 
 // unicastResponse sends a watch response to a specific watch substream.
-func (w *watchGrpcStream) unicastResponse(wr *WatchResponse, watchId int64) bool {
-	ws, ok := w.substreams[watchId]
+func (w *watchGRPCStream) unicastResponse(wr *WatchResponse, watchID int64) bool {
+	ws, ok := w.substreams[watchID]
 	if !ok {
 		return false
 	}
@@ -761,7 +761,7 @@ func (w *watchGrpcStream) unicastResponse(wr *WatchResponse, watchId int64) bool
 }
 
 // serveWatchClient forwards messages from the grpc stream to run()
-func (w *watchGrpcStream) serveWatchClient(wc pb.Watch_WatchClient) {
+func (w *watchGRPCStream) serveWatchClient(wc pb.Watch_WatchClient) {
 	for {
 		resp, err := wc.Recv()
 		if err != nil {
@@ -780,7 +780,7 @@ func (w *watchGrpcStream) serveWatchClient(wc pb.Watch_WatchClient) {
 }
 
 // serveSubstream forwards watch responses from run() to the subscriber
-func (w *watchGrpcStream) serveSubstream(ws *watcherStream, resumec chan struct{}) {
+func (w *watchGRPCStream) serveSubstream(ws *watcherStream, resumec chan struct{}) {
 	if ws.closing {
 		panic("created substream goroutine but substream is closing")
 	}
@@ -877,7 +877,7 @@ func (w *watchGrpcStream) serveSubstream(ws *watcherStream, resumec chan struct{
 	// lazily send cancel message if events on missing id
 }
 
-func (w *watchGrpcStream) newWatchClient() (pb.Watch_WatchClient, error) {
+func (w *watchGRPCStream) newWatchClient() (pb.Watch_WatchClient, error) {
 	// mark all substreams as resuming
 	close(w.resumec)
 	w.resumec = make(chan struct{})
@@ -923,7 +923,7 @@ func (w *watchGrpcStream) newWatchClient() (pb.Watch_WatchClient, error) {
 	return wc, nil
 }
 
-func (w *watchGrpcStream) waitCancelSubstreams(stopc <-chan struct{}) <-chan struct{} {
+func (w *watchGRPCStream) waitCancelSubstreams(stopc <-chan struct{}) <-chan struct{} {
 	var wg sync.WaitGroup
 	wg.Add(len(w.resuming))
 	donec := make(chan struct{})
@@ -960,7 +960,7 @@ func (w *watchGrpcStream) waitCancelSubstreams(stopc <-chan struct{}) <-chan str
 }
 
 // joinSubstreams waits for all substream goroutines to complete.
-func (w *watchGrpcStream) joinSubstreams() {
+func (w *watchGRPCStream) joinSubstreams() {
 	for _, ws := range w.substreams {
 		<-ws.donec
 	}
@@ -973,7 +973,7 @@ func (w *watchGrpcStream) joinSubstreams() {
 
 var maxBackoff = 100 * time.Millisecond
 
-func (w *watchGrpcStream) backoffIfUnavailable(backoff time.Duration, err error) time.Duration {
+func (w *watchGRPCStream) backoffIfUnavailable(backoff time.Duration, err error) time.Duration {
 	if isUnavailableErr(w.ctx, err) {
 		// retry, but backoff
 		if backoff < maxBackoff {
@@ -991,7 +991,7 @@ func (w *watchGrpcStream) backoffIfUnavailable(backoff time.Duration, err error)
 // openWatchClient retries opening a watch client until success or halt.
 // manually retry in case "ws==nil && err==nil"
 // TODO: remove FailFast=false
-func (w *watchGrpcStream) openWatchClient() (ws pb.Watch_WatchClient, err error) {
+func (w *watchGRPCStream) openWatchClient() (ws pb.Watch_WatchClient, err error) {
 	backoff := time.Millisecond
 	for {
 		select {
diff --git a/tests/integration/clientv3/concurrency/example_election_test.go b/tests/integration/clientv3/concurrency/example_election_test.go
index 7ac8e436257..e3a448e36c6 100644
--- a/tests/integration/clientv3/concurrency/example_election_test.go
+++ b/tests/integration/clientv3/concurrency/example_election_test.go
@@ -25,14 +25,14 @@ import (
 	"go.etcd.io/etcd/client/v3/concurrency"
 )
 
-func mockElection_Campaign() {
+func mockElectionCampaign() {
 	fmt.Println("completed first election with e2")
 	fmt.Println("completed second election with e1")
 }
 
 func ExampleElection_Campaign() {
 	forUnitTestsRunInMockedContext(
-		mockElection_Campaign,
+		mockElectionCampaign,
 		func() {
 			cli, err := clientv3.New(clientv3.Config{Endpoints: exampleEndpoints()})
 			if err != nil {
diff --git a/tests/integration/clientv3/concurrency/example_mutex_test.go b/tests/integration/clientv3/concurrency/example_mutex_test.go
index b33ba66b46c..c3b593aed9b 100644
--- a/tests/integration/clientv3/concurrency/example_mutex_test.go
+++ b/tests/integration/clientv3/concurrency/example_mutex_test.go
@@ -23,7 +23,7 @@ import (
 	"go.etcd.io/etcd/client/v3/concurrency"
 )
 
-func mockMutex_TryLock() {
+func mockMutexTryLock() {
 	fmt.Println("acquired lock for s1")
 	fmt.Println("cannot acquire lock for s2, as already locked in another session")
 	fmt.Println("released lock for s1")
@@ -32,7 +32,7 @@ func mockMutex_TryLock() {
 
 func ExampleMutex_TryLock() {
 	forUnitTestsRunInMockedContext(
-		mockMutex_TryLock,
+		mockMutexTryLock,
 		func() {
 			cli, err := clientv3.New(clientv3.Config{Endpoints: exampleEndpoints()})
 			if err != nil {
@@ -85,7 +85,7 @@ func ExampleMutex_TryLock() {
 	// acquired lock for s2
 }
 
-func mockMutex_Lock() {
+func mockMutexLock() {
 	fmt.Println("acquired lock for s1")
 	fmt.Println("released lock for s1")
 	fmt.Println("acquired lock for s2")
@@ -93,7 +93,7 @@ func mockMutex_Lock() {
 
 func ExampleMutex_Lock() {
 	forUnitTestsRunInMockedContext(
-		mockMutex_Lock,
+		mockMutexLock,
 		func() {
 			cli, err := clientv3.New(clientv3.Config{Endpoints: exampleEndpoints()})
 			if err != nil {
diff --git a/tests/integration/clientv3/concurrency/example_stm_test.go b/tests/integration/clientv3/concurrency/example_stm_test.go
index ca1db0e1d46..bff2914f96b 100644
--- a/tests/integration/clientv3/concurrency/example_stm_test.go
+++ b/tests/integration/clientv3/concurrency/example_stm_test.go
@@ -25,7 +25,7 @@ import (
 	"go.etcd.io/etcd/client/v3/concurrency"
 )
 
-func mockSTM_apply() {
+func mockSTMApply() {
 	fmt.Println("account sum is 500")
 }
 
@@ -33,7 +33,7 @@ func mockSTM_apply() {
 // transfer between balances.
 func ExampleSTM_apply() {
 	forUnitTestsRunInMockedContext(
-		mockSTM_apply,
+		mockSTMApply,
 		func() {
 			cli, err := clientv3.New(clientv3.Config{Endpoints: exampleEndpoints()})
 			if err != nil {